Megatest

           process.scm runs.scm tasks.scm tests.scm genexample.scm	\
           http-transport.scm tdb.scm client.scm mt.scm	\
           ezsteps.scm lock-queue.scm rmt.scm api.scm		\
           subrun.scm portlogger.scm archive.scm env.scm		\
           diff-report.scm cgisetup/models/pgdb.scm

# module source files
MSRCFILES = dbfile.scm debugprint.scm mtargs.scm commonmod.scm dbmod.scm \
           dbmemmod.scm tcp-transportmod.scm

all : $(PREFIX)/bin/.$(ARCHSTR) mtest dboard mtut tcmt

transport-mode.scm : transport-mode.scm.template
	cp transport-mode.scm.template transport-mode.scm

megatest.scm : transport-mode.scm

# dbmod.import.o is just a hack here
mofiles/dbfile.o     : mofiles/debugprint.o mofiles/commonmod.o dbmod.import.o
db.o : dbmod.import.o
mofiles/debugprint.o : mofiles/mtargs.o

# ftail.scm rmtmod.scm commonmod.scm removed

	    (match server-dat
	      ((host port start-time server-id pid)
	       (debug:print-info 4 *default-log-port* "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)
	       (if (not runremote)
                   (begin
		     ;; Here we are creating a runremote where there was none or it was clobbered with #f
		     ;;
		     (set! runremote (make-and-init-remote))
                     (let* ((server-info (server:check-if-running areapath)))
		       (remote-server-info-set! runremote server-info)
                       (if server-info
                           (begin
                             (remote-server-url-set! runremote (server:record->url server-info))
                             (remote-server-id-set! runremote (server:record->id server-info)))))))
	       ;; at this point we have a runremote

(define *common:this-exe-name*     (pathname-strip-directory *common:this-exe-fullpath*))

(define (common:get-sync-lock-filepath)
  (let* ((tmp-area     (common:get-db-tmp-area))
         (lockfile     (conc tmp-area "/megatest.db.sync-lock")))
    lockfile))
























(define *common:logpro-exit-code->status-sym-alist*
  '( ( 0 . pass )
     ( 1 . fail )
     ( 2 . warn )
     ( 3 . check )
     ( 4 . waived )
     ( 5 . abort )

		      (create-directory dbarea)))
		dbpath))
	  #f)))

(define (common:get-area-path-signature)
  (message-digest-string (md5-primitive) *toppath*))




;;======================================================================
;; E X I T   H A N D L I N G
;;======================================================================

(define (common:run-sync?)
  (and *toppath*               ;; gate if called before *toppath* is set
       (common:on-homehost?)
       (args:get-arg "-server")))





(define (std-signal-handler signum)
  ;; (signal-mask! signum)
  (set! *time-to-exit* #t) 
  ;;(debug:print-info 13 *default-log-port* "got signal "signum)
  (debug:print-error 0 *default-log-port* "Received signal " signum " aaa exiting promptly")
  ;; (std-exit-procedure) ;; shouldn't need this since we are exiting and it will be called anyway

                       (conc "viewscreen " cmd))))
    (debug:print-info 02 *default-log-port* "Running command: " fullcmd)
    (cond
     (with-vars     (common:without-vars  fullcmd))
     (with-orig-env (common:with-orig-env fullcmd))
     (else          (common:without-vars  fullcmd "MT_.*")))))
		  

























































































































































































































































































;;======================================================================
;; C O L O R S
;;======================================================================
      
(define (common:name->iup-color name)
  (case (string->symbol (string-downcase name))
    ((red)    "223 33 49")

;; 
;;     You should have received a copy of the GNU General Public License
;;     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.

;;======================================================================

(declare (unit commonmod))
;; (declare (uses debugprint))

(use srfi-69)

(module commonmod
	*

(import scheme
	chicken

	(prefix sqlite3 sqlite3:)
	data-structures
	extras
	files
	matchable
	md5
	message-digest
	posix
	regex
	regex-case
	srfi-1
	srfi-18
	srfi-69
	typed-records

	;; debugprint
	)

;;======================================================================
;; CONTENTS
;;
;;  config file utils
;;  misc conversion, data manipulation functions
;;  testsuite and area utilites

;;
(define (get-cfg-areas cfgdat)
  (let ((adat (get-section cfgdat "areas")))
    (map (lambda (entry)
	   `(,(car entry) . 
	     ,(val->alist (cadr entry))))
	 adat)))

;;======================================================================
;; time utils
;;======================================================================

(define (common:human-time)
  (time->string (seconds->local-time (current-seconds)) "%Y-%m-%d %H:%M:%S"))

;;======================================================================
;; T I M E   A N D   D A T E
;;======================================================================

;;======================================================================
;; Convert strings like "5s 2h 3m" => 60x60x2 + 3x60 + 5
(define (common:hms-string->seconds tstr)
  (let ((parts     (string-split-fields "\\w+" tstr))
	(time-secs 0)
	;; s=seconds, m=minutes, h=hours, d=days, M=months, y=years, w=weeks
	(trx       (regexp "(\\d+)([smhdMyw])")))
    (for-each (lambda (part)
		(let ((match  (string-match trx part)))
		  (if match
		      (let ((val (string->number (cadr match)))
			    (unt (caddr match)))
			(if val 
			    (set! time-secs (+ time-secs (* val
							    (case (string->symbol unt)
							      ((s) 1)
							      ((m) 60) ;; minutes
							      ((h) 3600)
							      ((d) 86400)
							      ((w) 604800)
							      ((M) 2628000) ;; aproximately one month
							      ((y) 31536000)
							      (else #f))))))))))
	      parts)
    time-secs))
		       
(define (seconds->hr-min-sec secs)
  (let* ((hrs (quotient secs 3600))
	 (min (quotient (- secs (* hrs 3600)) 60))
	 (sec (- secs (* hrs 3600)(* min 60))))
    (conc (if (> hrs 0)(conc hrs "hr ") "")
	  (if (> min 0)(conc min "m ")  "")
	  sec "s")))

(define (seconds->time-string sec)
  (time->string 
   (seconds->local-time sec) "%H:%M:%S"))

(define (seconds->work-week/day-time sec)
  (time->string
   (seconds->local-time sec) "ww%V.%u %H:%M"))

(define (seconds->work-week/day sec)
  (time->string
   (seconds->local-time sec) "ww%V.%u"))

(define (seconds->year-work-week/day sec)
  (time->string
   (seconds->local-time sec) "%yww%V.%w"))

(define (seconds->year-work-week/day-time sec)
  (time->string
   (seconds->local-time sec) "%Yww%V.%w %H:%M"))

(define (seconds->year-week/day-time sec)
  (time->string
   (seconds->local-time sec) "%Yw%V.%w %H:%M"))

(define (seconds->quarter sec)
  (case (string->number
	 (time->string 
	  (seconds->local-time sec)
	  "%m"))
    ((1 2 3) 1)
    ((4 5 6) 2)
    ((7 8 9) 3)
    ((10 11 12) 4)
    (else #f)))

;;======================================================================
;; basic ISO8601 format (e.g. "2017-02-28 06:02:54") date time => Unix epoch
;;
(define (common:date-time->seconds datetime)
  (local-time->seconds (string->time datetime "%Y-%m-%d %H:%M:%S")))

;;======================================================================
;; given span of seconds tstart to tend
;; find start time to mark and mark delta
;;
(define (common:find-start-mark-and-mark-delta tstart tend)
  (let* ((deltat   (- (max tend (+ tend 10)) tstart)) ;; can't handle runs of less than 4 seconds. Pad it to 10 seconds ...
	 (result   #f)
	 (min      60)
	 (hr       (* 60 60))
	 (day      (* 24 hr))
	 (yr       (* 365 day)) ;; year
	 (mo       (/ yr 12))
	 (wk       (* day 7)))
    (for-each
     (lambda (max-blks)
       (for-each
	(lambda (span) ;; 5 2 1
	  (if (not result)
	      (for-each 
	       (lambda (timeunit timesym) ;; year month day hr min sec
		 (if (not result)
		     (let* ((time-blk (* span timeunit))
			    (num-blks (quotient deltat time-blk)))
		       (if (and (> num-blks 4)(< num-blks max-blks))
			   (let ((first (* (quotient tstart time-blk) time-blk)))
			     (set! result (list span timeunit time-blk first timesym))
			     )))))
	       (list yr mo wk day hr min 1)
	       '(     y  mo w  d   h  m   s))))
	(list 8 6 5 2 1)))
     '(5 10 15 20 30 40 50 500))
    (if values
	(apply values result)
	(values 0 day 1 0 'd))))

;;======================================================================
;; given x y lim return the cron expansion
;;
(define (common:expand-cron-slash x y lim)
  (let loop ((curr x)
	     (res  `()))
    (if (< curr lim)
	(loop (+ curr y) (cons curr res))
	(reverse res))))

;;======================================================================
;; expand a complex cron string to a list of cron strings
;;
;;  x/y   => x, x+y, x+2y, x+3y while x+Ny<max_for_field
;;  a,b,c => a, b ,c
;;
;;   NOTE: with flatten a lot of the crud below can be factored down.
;;
(define (common:cron-expand cron-str)
  (if (list? cron-str)
      (flatten
       (fold (lambda (x res)
	       (if (list? x)
		   (let ((newres (map common:cron-expand x)))
		     (append x newres))
		   (cons x res)))
	     '()
	     cron-str)) ;; (map common:cron-expand cron-str))
      (let ((cron-items (string-split cron-str))
	    (slash-rx   (regexp "(\\d+)/(\\d+)"))
	    (comma-rx   (regexp ".*,.*"))
	    (max-vals   '((min        . 60)
			  (hour       . 24)
			  (dayofmonth . 28) ;;; BUG!!!! This will be a bug for some combinations
			  (month      . 12)
			  (dayofweek  . 7))))
	(if (< (length cron-items) 5) ;; bad spec
	    cron-str ;; `(,cron-str)              ;; just return the string, something downstream will fix it
	    (let loop ((hed  (car cron-items))
		       (tal  (cdr cron-items))
		       (type 'min)
		       (type-tal '(hour dayofmonth month dayofweek))
		       (res  '()))
	      (regex-case
		  hed
		(slash-rx ( _ base incr ) (let* ((basen          (string->number base))
						 (incrn          (string->number incr))
						 (expanded-vals  (common:expand-cron-slash basen incrn (alist-ref type max-vals)))
						 (new-list-crons (fold (lambda (x myres)
									 (cons (conc (if (null? res)
											 ""
											 (conc (string-intersperse res " ") " "))
										     x " " (string-intersperse tal " "))
									       myres))
								       '() expanded-vals)))
					    ;; (print "new-list-crons: " new-list-crons)
					    ;; (fold (lambda (x res)
					    ;; 	    (if (list? x)
					    ;; 		(let ((newres (map common:cron-expand x)))
					    ;; 		  (append x newres))
					    ;; 		(cons x res)))
					    ;; 	  '()
					    (flatten (map common:cron-expand new-list-crons))))
		;;					    (map common:cron-expand (map common:cron-expand new-list-crons))))
		(else (if (null? tal)
			  cron-str
			  (loop (car tal)(cdr tal)(car type-tal)(cdr type-tal)(append res (list hed)))))))))))

;;======================================================================
;; given a cron string and the last time event was processed return #t to run or #f to not run
;;
;;  min    hour   dayofmonth month  dayofweek
;; 0-59    0-23   1-31       1-12   0-6          ### NOTE: dayofweek does not include 7
;;
;;  #t => yes, run the job
;;  #f => no, do not run the job
;;
(define (common:cron-event cron-str now-seconds-in last-done) ;; ref-seconds = #f is NOW.
  (let* ((cron-items     (map string->number (string-split cron-str)))
	 (now-seconds    (or now-seconds-in (current-seconds)))
	 (now-time       (seconds->local-time now-seconds))
	 (last-done-time (seconds->local-time last-done))
	 (all-times      (make-hash-table)))
    ;; (print "cron-items: " cron-items "(length cron-items): " (length cron-items))
    (if (not (eq? (length cron-items) 5)) ;; don't even try to figure out junk strings
	#f
	(match-let (((     cmin chour cdayofmonth cmonth    cdayofweek)
		     cron-items)
		    ;; 0     1    2        3         4    5      6
		    ((nsec nmin nhour ndayofmonth nmonth nyr ndayofweek n7 n8 n9)
		     (vector->list now-time))
		    ((lsec lmin lhour ldayofmonth lmonth lyr ldayofweek l7 l8 l9)
		     (vector->list last-done-time)))
	  ;; create all possible time slots
	  ;; remove invalid slots due to (for example) day of week
	  ;; get the start and end entries for the ref-seconds (current) time
	  ;; if last-done > ref-seconds => this is an ERROR!
	  ;; does the last-done time fall in the legit region?
	  ;;    yes => #f  do not run again this command
	  ;;    no  => #t  ok to run the command
	  (for-each ;; month
	   (lambda (month)
	     (for-each ;; dayofmonth
	      (lambda (dom)
		(for-each
		 (lambda (hr) ;; hour
		   (for-each
		    (lambda (minute) ;; minute
		      (let ((copy-now (apply vector (vector->list now-time))))
			(vector-set! copy-now 0 0) ;; force seconds to zero
			(vector-set! copy-now 1 minute)
			(vector-set! copy-now 2 hr)
			(vector-set! copy-now 3 dom)  ;; dom is already corrected for zero referenced
			(vector-set! copy-now 4 month)
			(let* ((copy-now-secs (local-time->seconds copy-now))
			       (new-copy      (seconds->local-time copy-now-secs))) ;; remake the time vector
			  (if (or (not cdayofweek)
				  (equal? (vector-ref new-copy 6)
					  cdayofweek)) ;; if the day is specified and a match OR if the day is NOT specified
			      (if (or (not cdayofmonth)
				      (equal? (vector-ref new-copy 3)
					      (+ 1 cdayofmonth))) ;; if the month is specified and a match OR if the month is NOT specified
				  (hash-table-set! all-times copy-now-secs new-copy))))))
		    (if cmin
			`(,cmin)  ;; if given cmin, have to use it
			(list (- nmin 1) nmin (+ nmin 1))))) ;; minute
		 (if chour
		     `(,chour)
		     (list (- nhour 1) nhour (+ nhour 1))))) ;; hour
	      (if cdayofmonth
		  `(,cdayofmonth)
		  (list (- ndayofmonth 1) ndayofmonth (+ ndayofmonth 1)))))
	   (if cmonth
	       `(,cmonth)
	       (list (- nmonth 1) nmonth (+ nmonth 1))))
	  (let ((before #f)
		(is-in  #f))
	    (for-each
	     (lambda (moment)
	       (if (and before
			(<= before now-seconds)
			(>= moment now-seconds))
		   (begin
		     ;; (print)
		     ;; (print "Before: " (time->string (seconds->local-time before)))
		     ;; (print "Now:    " (time->string (seconds->local-time now-seconds)))
		     ;; (print "After:  " (time->string (seconds->local-time moment)))
		     ;; (print "Last:   " (time->string (seconds->local-time last-done)))
		     (if (<  last-done before)
			 (set! is-in before))
		     ))
	       (set! before moment))
	     (sort (hash-table-keys all-times) <))
	    is-in)))))

(define (common:extended-cron  cron-str now-seconds-in last-done)
  (let ((expanded-cron (common:cron-expand cron-str)))
    (if (string? expanded-cron)
	(common:cron-event expanded-cron now-seconds-in last-done)
	(let loop ((hed (car expanded-cron))
		   (tal (cdr expanded-cron)))
	  (if (common:cron-event hed now-seconds-in last-done)
	      #t
	      (if (null? tal)
		  #f
		  (loop (car tal)(cdr tal))))))))



;;======================================================================
;; misc stuff
;;======================================================================

(define (common:get-signature str)
  (message-digest-string (md5-primitive) str))

;;======================================================================
;; hash of hashs
;;======================================================================

(define (db:hoh-set! dat key1 key2 val)
  (let* ((subhash (hash-table-ref/default dat key1 #f)))
    (if subhash
	(hash-table-set! subhash key2 val)
	(begin
	  (hash-table-set! dat key1 (make-hash-table))
	  (db:hoh-set! dat key1 key2 val)))))

(define (db:hoh-get dat key1 key2)
  (let* ((subhash (hash-table-ref/default dat key1 #f)))
    (and subhash
	 (hash-table-ref/default subhash key2 #f))))

;;======================================================================
;; when called from a wrapper I need sometimes to find the calling
;; wrapper, this is for dashboard to find the correct megatest.
;;
(define (common:find-local-megatest #!optional (progname "megatest"))
  (let ((res (filter file-exists?
		     (map (lambda (updir)
			    (let* ((lm  (car (argv)))
				   (dir (pathname-directory lm))
				   (exe (pathname-strip-directory lm)))
			      (conc (if dir (conc dir "/") "")
				    (case (string->symbol exe)
				      ((dboard)    (conc updir progname))
				      ((mtest)     (conc updir progname))
				      ((dashboard) progname)
				      (else exe)))))
			  '("../../" "../")))))
    (if (null? res)
	(begin
	  ;; (debug:print 0 *default-log-port* "Failed to find this executable! Using what can be found on the path")
	  progname)
	(car res))))

)

;;======================================================================
;; Database access
;;======================================================================

;; dbstruct vector containing all the relevant dbs like main.db, megatest.db, run.db etc

(declare (unit db))
(declare (uses common))
(declare (uses debugprint))
(declare (uses dbmod))
(declare (uses dbfile))
(declare (uses keys))
(declare (uses ods))
(declare (uses client))
(declare (uses mt))

(use (srfi 18)
     extras
     tcp
     stack
     (prefix sqlite3 sqlite3:)
     srfi-1
     posix

     format
     dot-locking
     z3
     typed-records
     matchable
     files)











(include "common_records.scm")
(include "db_records.scm")
(include "key_records.scm")
(include "run_records.scm")

(define *number-of-writes* 0)
(define *number-non-write-queries* 0)

(import debugprint)
(import dbmod)
(import dbfile)

;; record for keeping state,status and count for doing roll-ups in
;; iterated tests
;;
(defstruct dbr:counts

(define (db:setup do-sync)
  (assert *toppath* "FATAL: db:setup called before launch:setup has been run.")
  (let* ((tmpdir (common:get-db-tmp-area)))
    (if (not *dbstruct-dbs*)
	(dbfile:setup do-sync *toppath* tmpdir)
	*dbstruct-dbs*)))

(define (db:with-db dbstruct run-id r/w proc . params)
  (case (rmt:transport-mode)
    ((http)(dbfile:with-db dbstruct run-id r/w proc params))
    ((tcp) (dbmod:with-db dbstruct run-id r/w proc params))))

;; moved from dbfile
;;
;; ADD run-id SUPPORT
;;
(define (db:create-all-triggers dbstruct)
  (db:with-db
   dbstruct #f #f
   (lambda (dbdat db)
     (db:create-triggers db))))

(define (db:create-triggers db)
    (for-each (lambda (key)
              (sqlite3:execute db (cadr key)))
          db:trigger-list))

(define (db:drop-all-triggers dbstruct)
  (db:with-db
   dbstruct #f #f
   (lambda (dbdat db)
     (db:drop-triggers db))))

(define (db:have-incompletes? dbstruct run-id ovr-deadtime)
  (let* ((incompleted '())
	 (oldlaunched '())
	 (toplevels   '())
	 ;; (deadtime-str (configf:lookup *configdat* "setup" "deadtime"))
	 (deadtime  (or ovr-deadtime 72000))) ;; twenty hours
    (db:with-db
     dbstruct run-id #f
     (lambda (dbdat db)
       
       ;; in RUNNING or REMOTEHOSTSTART for more than 10 minutes
       ;;
       ;; HOWEVER: this code in run:test seems to work fine
       ;;              (> (- (current-seconds)(+ (db:test-get-event_time testdat)
       ;;                     (db:test-get-run_duration testdat)))
       ;;                    600) 
       ;; (db:delay-if-busy dbdat)
       (sqlite3:for-each-row 
        (lambda (test-id run-dir uname testname item-path)
          (if (and (equal? uname "n/a")
                   (equal? item-path "")) ;; this is a toplevel test
              ;; what to do with toplevel? call rollup?
              (begin
                (set! toplevels   (cons (list test-id run-dir uname testname item-path run-id) toplevels)))
                ;; (print-info "Found old toplevel test in RUNNING state, test-id=" test-id))
              (set! incompleted (cons (list test-id run-dir uname testname item-path run-id) incompleted))))
        (db:get-cache-stmth dbdat db
        "SELECT id,rundir,uname,testname,item_path FROM tests WHERE run_id=? AND (strftime('%s','now') - event_time) > (run_duration + ?) AND state IN ('RUNNING','REMOTEHOSTSTART');")
        run-id deadtime)

       ;; in LAUNCHED for more than one day. Could be long due to job queues TODO/BUG: Need override for this in config
       ;;
       ;; (db:delay-if-busy dbdat)
       (sqlite3:for-each-row
        (lambda (test-id run-dir uname testname item-path)
          (if (and (equal? uname "n/a")
                   (equal? item-path "")) ;; this is a toplevel test
              ;; what to do with toplevel? call rollup?
              (set! toplevels   (cons (list test-id run-dir uname testname item-path run-id) toplevels))
              (set! oldlaunched (cons (list test-id run-dir uname testname item-path run-id) oldlaunched))))
        (db:get-cache-stmth dbdat db
        "SELECT id,rundir,uname,testname,item_path FROM tests WHERE run_id=? AND (strftime('%s','now') - event_time) > 86400 AND state IN ('LAUNCHED');")
        run-id)
       
       ;; (print-info "Found " (length oldlaunched) " old LAUNCHED items, " (length toplevels) " old LAUNCHED toplevel tests and " (length incompleted) " tests marked RUNNING but apparently dead.")
       (if (and (null? incompleted)
                (null? oldlaunched)
                (null? toplevels))
           #f
           #t)))))


;; looks up subdb and returns it, if not found then set up
;; and then return it.
;;
#;(define (db:get-db dbstruct run-id)
  (let* ((res (dbfile:get-subdb dbstruct run-id)))
    (if res

	 (src-area (if old2new *toppath* tmp-area))
	 (dest-area (if old2new tmp-area *toppath*))
	 (dbfiles        (if old2new (glob (conc *toppath* "/.megatest/*.db")) (glob (conc tmp-area "/.megatest/*.db"))))
	 (keys (db:get-keys dbstruct))
	 (sync-durations (make-hash-table)))

    ;; kill servers
    (if killservers (db:kill-servers))
    
    (if (not dbfiles)
	(debug:print-error 0 *default-log-port* "no dbfiles found in " (conc *toppath* "/.megatest"))
	(for-each
	 (lambda (srcfile)
	   (debug:print-info 3 *default-log-port* "file: " srcfile)
	   (let* ((fname    (conc (pathname-file srcfile) ".db"))

;; Sync all changed db's
;;
(define (db:tmp->megatest.db-sync dbstruct run-id last-update)
  (let* ((subdbs (hash-table-values (dbr:dbstruct-subdbs dbstruct)))
	 (res    '()))
    (for-each
     (lambda (subdb)

       (let* ((mtdb   (dbr:subdb-mtdb subdb))
	      (tmpdb  (db:get-subdb dbstruct run-id))
	      (refndb (dbr:subdb-refndb subdb))
	      (newres (db:sync-tables (db:sync-all-tables-list dbstruct (db:get-keys dbstruct)) last-update tmpdb refndb mtdb)))
	 ;; (stack-push! (dbr:subdb-dbstack subdb) tmpdb)
	 ;; BUG: verify this is really needed
	 (dbfile:add-dbdat dbstruct run-id tmpdb)
	 (set! res (cons newres res))))

	ports

	commonmod
	;; debugprint
	)

(define keep-age-param (make-parameter 10)) ;; qif file age, if over move to attic
(define num-run-dbs    (make-parameter 10))     ;; number of db's in .megatest
(define dbfile:testsuite-name (make-parameter #f))

;;======================================================================
;;  R E C O R D S
;;======================================================================

;; a single Megatest area with it's multiple dbs is
;; managed in a dbstruct
;;
(defstruct dbr:dbstruct
  (areapath  #f)
  (homehost  #f)
  (tmppath   #f)
  (read-only #f)
  (subdbs (make-hash-table))
  ;;
  ;; for the inmem approach (see dbmod.scm)
  ;; this is one db per server
  (inmem     #f)  ;; handle for the in memory copy
  (dbfile    #f)  ;; path to the db file on disk
  (ondiskdb  #f)  ;; handle for the on-disk file
  (dbdat     #f)  ;; create a dbdat for the downstream calls such as db:with-db
  )

;; NOTE: Need one dbr:subdb per main.db, 1.db ...
;;
(defstruct dbr:subdb
  (dbname      #f) ;; .megatest/1.db
  (mtdbfile    #f) ;; mtrah/.megatest/1.db

                               END;" )
	   (list "update_test_data_trigger"  "CREATE TRIGGER  IF NOT EXISTS update_test_data_trigger AFTER UPDATE ON test_data
                             FOR EACH ROW
                               BEGIN 
                                 UPDATE test_data SET last_update=(strftime('%s','now'))
                                   WHERE id=old.id;
                               END;" )))




















(define (db:is-trigger-dropped db tbl-name)
  (let* ((trigger-name (if (equal? tbl-name "test_steps")
			   "update_teststeps_trigger" 
                           (conc "update_" tbl-name "_trigger")))
	 (res          #f))
    (sqlite3:for-each-row
     (lambda (name)

;;======================================================================

;; call with dbinit=db:initialize-main-db
;;
(define (db:open-db dbstruct run-id dbinit)
  ;; (mutex-lock! *db-open-mutex*)
  (let* ((dbdat (dbfile:open-db dbstruct run-id dbinit)))
              #;(case (rmt:transport-mode)
		  ((http) (dbfile:open-db dbstruct run-id dbinit))
		  ((tcp)  (dbmod:open-db  dbstruct run-id dbinit))
		  (else (assert #f "FATAL: rmt:transport-node not correct value"(rmt:transport-mode))))
    (set! *db-write-access* (not (dbr:dbdat-read-only dbdat)))
    ;; (mutex-unlock! *db-open-mutex*)
    dbdat))

(define dbfile:db-init-proc (make-parameter #f))

;; in xmaxima this gives a curve close to what I want:

    crumbn))

(define no-condition-db-with-db (make-parameter #t))

;; (db:with-db dbstruct run-id sqlite3:exec "select blah fgrom blaz;")
;; r/w is a flag to indicate if the db is modified by this query #t = yes, #f = no
;;
(define (dbfile:with-db dbstruct run-id r/w proc params)
  (assert dbstruct "FATAL: db:with-db called with dbstruct "#f)
  (assert (dbr:dbstruct? dbstruct) "FATAL: dbstruct is "dbstruct)
  (let* ((use-mutex (> *api-process-request-count* 25)) ;; risk of db corruption
	 (have-struct (dbr:dbstruct? dbstruct))
         (dbdat     (if have-struct                ;; this stuff just allows us to call with a db handle directly
			(db:open-db dbstruct run-id (dbfile:db-init-proc)) ;; (dbfile:get-subdb dbstruct run-id)
			#f))

	 (stmth       (hash-table-ref/default stmt-cache stmt #f)))
    (or stmth
	(let* ((newstmth (sqlite3:prepare db stmt)))
	  ;; (db:hoh-set! stmt-cache db stmt newstmth)
	  (hash-table-set! stmt-cache stmt newstmth)
	  newstmth))))












































)

;;======================================================================
;; Copyright 2017, Matthew Welland.
;; 
;; This file is part of Megatest.
;; 
;;     Megatest is free software: you can redistribute it and/or modify
;;     it under the terms of the GNU General Public License as published by
;;     the Free Software Foundation, either version 3 of the License, or
;;     (at your option) any later version.
;; 
;;     Megatest is distributed in the hope that it will be useful,
;;     but WITHOUT ANY WARRANTY; without even the implied warranty of
;;     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;     GNU General Public License for more details.
;; 
;;     You should have received a copy of the GNU General Public License
;;     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.

;;======================================================================

(declare (unit dbmemmod))
(declare (uses debugprint))
(declare (uses commonmod))

(module dbmemmod
	*
	
  (import scheme
	  chicken
	  data-structures
	  extras
	  matchable)
  
(import (prefix sqlite3 sqlite3:)
	posix typed-records srfi-18 srfi-1
	srfi-69
	stack
	files
	ports

	debugprint
	commonmod
	)

(define keep-age-param (make-parameter 10)) ;; qif file age, if over move to attic
(define num-run-dbs (make-parameter 10))     ;; number of db's in .megatest

;;======================================================================
;;  R E C O R D S
;;======================================================================

;; a single Megatest area with it's multiple dbs is
;; managed in a dbstruct
;;
(defstruct dbr:dbstruct
  (areapath  #f)
  (homehost  #f)
  (tmppath   #f)
  (read-only #f)
  (subdbs (make-hash-table))
  )

;; NOTE: Need one dbr:subdb per main.db, 1.db ...
;;
(defstruct dbr:subdb
  (dbname      #f) ;; .megatest/1.db
  (mtdbfile    #f) ;; mtrah/.megatest/1.db
  (mtdbdat     #f) ;; only need one of these for syncing
  ;; (dbdats      (make-hash-table))  ;; id => dbdat 
  (tmpdbfile   #f) ;; /tmp/.../.megatest/1.db
  ;; (refndbfile  #f) ;; /tmp/.../.megatest/1.db_ref
  (dbstack     (make-stack)) ;; stack for tmp dbr:dbdat,
  (homehost    #f) ;; not used yet
  (on-homehost #f) ;; not used yet
  (read-only   #f)
  (last-sync   0)
  (last-write  (current-seconds))
  )                ;; goal is to converge on one struct for an area but for now it is too confusing

;; need to keep dbhandles and cached statements together
(defstruct dbr:dbdat
  (dbfile      #f)
  (dbh         #f)    
  (stmt-cache  (make-hash-table))
  (read-only   #f)
  (birth-sec   (current-seconds)))

(define *dbstruct-dbs* #f)
(define *db-open-mutex* (make-mutex))
(define *db-access-mutex* (make-mutex)) ;; used in common.scm
(define *no-sync-db*   #f)
(define *db-sync-in-progress* #f)
(define *db-with-db-mutex*    (make-mutex))
(define *max-api-process-requests* 0)
(define *api-process-request-count* 0)
(define *db-write-access*     #t)
(define *db-last-sync*        0)                 ;; last time the sync to megatest.db happened
(define *db-multi-sync-mutex* (make-mutex))      ;; protect access to *db-sync-in-progress*, *db-last-sync*

(define (db:generic-error-printout exn . message)
  (print-call-chain (current-error-port))
  (apply dbfile:print-err message)
  (dbfile:print-err
    ", error: "     ((condition-property-accessor 'exn 'message)   exn)
    ", arguments: " ((condition-property-accessor 'exn 'arguments) exn)
    ", location: "  ((condition-property-accessor 'exn 'location)  exn)
    ))

(define (dbfile:run-id->key run-id)
  (or run-id 'main))

(define (db:safely-close-sqlite3-db db stmt-cache #!key (try-num 3))
  (if (<= try-num 0)
      #f
      (handle-exceptions
	  exn
	(begin
	  (print "Attempt to safely close sqlite3 db failed. Trying again. exn=" exn)
	  (thread-sleep! 3)
	  (sqlite3:interrupt! db)
	  (db:safely-close-sqlite3-db db stmt-cache try-num: (- try-num 1)))
	(if (sqlite3:database? db)
	    (let* ((stmts (and stmt-cache (hash-table-ref/default stmt-cache db #f))))
	      (if stmts (map sqlite3:finalize! (hash-table-values stmts)))
	      (sqlite3:finalize! db)
	      #t)
            (begin
             (dbfile:print-err "db:safely-close-sqlite3-db: " db " is not an sqlite3 db")
	     #f
            )
        ))))

;; close all opened run-id dbs
(define (db:close-all dbstruct)
  (if (dbr:dbstruct? dbstruct)
;; (handle-exceptions
;; 	  exn
;; 	  (begin
;; 	    (debug:print 0 *default-log-port* "WARNING: Finalizing failed, "  ((condition-property-accessor 'exn 'message) exn) ", note - exn=" exn)
;; 	    (print-call-chain *default-log-port*))
	;; (db:sync-touched dbstruct 0 force-sync: #t) ;; NO. Do not do this here. Instead we rely on a server to be started when there are writes, even if the server itself is not going to be used as a server.
        (let* ((subdbs     (hash-table-values (dbr:dbstruct-subdbs dbstruct))))
	  (for-each
	   (lambda (subdb)
	     (let* ((tdbs       (stack->list (dbr:subdb-dbstack subdb)))
		    (mtdbdat    (dbr:dbdat-dbh (dbr:subdb-mtdbdat subdb)))
		    #;(rdb        (dbr:dbdat-dbh (dbr:subdb-refndb subdb))))
		    
	       (map (lambda (dbdat)
		      (let* ((stmt-cache (dbr:dbdat-stmt-cache dbdat))
			     (dbh        (dbr:dbdat-dbh        dbdat)))
			(db:safely-close-sqlite3-db dbh stmt-cache)))
		    tdbs)
	       (db:safely-close-sqlite3-db mtdbdat (dbr:dbdat-stmt-cache  (dbr:subdb-mtdbdat subdb))) 
               ;; (if (sqlite3:database? mdb) (sqlite3:finalize! mdb))
	       #;(db:safely-close-sqlite3-db rdb #f))) ;; stmt-cache))))) ;; (if (sqlite3:database? rdb) (sqlite3:finalize! rdb))))))
	   subdbs)
           #t
          )
          #f
  )
)

;; ;; set up a single db (e.g. main.db, 1.db ... etc.)
;; ;;
;; (define (db:setup-db dbstruct areapath run-id)
;;   (let* ((dbname   (db:run-id->dbname run-id))
;; 	 (dbstruct (hash-table-ref/default dbstructs dbname #f)))
;;     (if dbstruct
;; 	dbstruct
;; 	(let* ((dbstruct-new (make-dbr:dbstruct)))
;; 	  (db:open-db dbstruct-new run-id areapath: areapath do-sync: #t)
;; 	  (hash-table-set! dbstructs dbname dbstruct-new)
;; 	  dbstruct-new))))
    
;; ; Returns the dbdat for a particular dbfile inside the area
;; ;;
;; (define (dbr:dbstruct-get-dbdat dbstruct dbfile)
;;   (hash-table-ref/default (dbr:dbstruct-dbdats dbstruct) dbfile #f))
;; 
;; (define (dbr:dbstruct-dbdat-put! dbstruct dbfile db)
;;   (hash-table-set! (dbr:dbstruct-dbdats dbstruct) dbfile db))
;; 
;; (define (db:run-id->first-num run-id)
;;   (let* ((s (number->string run-id))
;; 	 (l (string-length s)))
;;     (substring s (- l 1) l)))

;; 1234 => 4/1234.db
;;   #f => 0/main.db
;;   (abandoned the idea of num/db)
;; 
(define (dbfile:run-id->path apath run-id)
  (conc apath"/"(dbfile:run-id->dbname run-id)))

(define (db:dbname->path apath dbname)
  (conc apath"/"dbname))

(define (dbfile:run-id->dbnum run-id)
  (cond
   ((number? run-id)
    (modulo run-id (num-run-dbs)))
   ((not run-id) "main")   ;; 0 or main?
   (else run-id)))

;; POTENTIAL BUG: this implementation could produce a db file if run-id is neither #f or a number
(define (dbfile:run-id->dbname run-id)
  (conc ".megatest/"(dbfile:run-id->dbnum run-id)".db"))

;; Make the dbstruct, setup up auxillary db's and call for main db at least once
;;
;; called in http-transport and replicated in rmt.scm for *local* access. 
;;
(define (dbfile:setup do-sync areapath tmppath)
  (cond
   (*dbstruct-dbs*
    (dbfile:print-err "WARNING: dbfile:setup called when *dbstruct-dbs* is already initialized")
    *dbstruct-dbs*) ;; TODO: when multiple areas are supported, this optimization will be a hazard
   (else
    (let* ((dbstruct (make-dbr:dbstruct)))
      (set! *dbstruct-dbs* dbstruct)
      (dbr:dbstruct-areapath-set! dbstruct areapath)
      (dbr:dbstruct-tmppath-set!  dbstruct tmppath)
      dbstruct))))

(define (dbfile:get-subdb dbstruct run-id)
  (let* ((dbfname (dbfile:run-id->dbname run-id)))
    (hash-table-ref/default (dbr:dbstruct-subdbs dbstruct) dbfname #f)))

(define (dbfile:set-subdb dbstruct run-id subdb)
  (hash-table-set! (dbr:dbstruct-subdbs dbstruct) (dbfile:run-id->dbname run-id) subdb))

;; (define *dbfile:num-handles-in-use* 0)

;; Get/open a database
;;    if run-id => get run specific db
;;    if #f     => get main db
;;    if run-id is a string treat it as a filename
;;    if db already open - return inmem
;;    if db not open, open inmem, rundb and sync then return inmem
;;    inuse gets set automatically for rundb's
;;
(define (dbfile:get-dbdat dbstruct run-id)
  (let* ((subdb (dbfile:get-subdb dbstruct run-id)))
    (if (stack-empty? (dbr:subdb-dbstack subdb))
	#f
	(begin
	  (stack-pop! (dbr:subdb-dbstack subdb))))))

;; return a previously opened db handle to the stack of available handles
(define (dbfile:add-dbdat dbstruct run-id dbdat)
  (let* ((subdb (dbfile:get-subdb dbstruct run-id))
	 (dbstk (dbr:subdb-dbstack subdb))
	 (count (stack-count dbstk)))
    (if (> count 15)
	(dbfile:print-err "WARNING: stack for "run-id".db is "count"."))
    (stack-push! dbstk dbdat)
    dbdat))

;; set up a subdb
;;
(define (dbfile:init-subdb dbstruct run-id init-proc)
  (let* ((dbname    (dbfile:run-id->dbname run-id))
	 (areapath  (dbr:dbstruct-areapath dbstruct))
	 (tmppath   (dbr:dbstruct-tmppath  dbstruct))
	 (mtdbpath  (dbfile:run-id->path areapath run-id))
	 (tmpdbpath (dbfile:run-id->path tmppath run-id))
	 (mtdbdat   (dbfile:open-sqlite3-db mtdbpath init-proc sync-mode: 0 journal-mode: #f)) ;; "WAL"))
	 (newsubdb  (make-dbr:subdb dbname:    dbname
				    mtdbfile:  mtdbpath
				    tmpdbfile: tmpdbpath
				    mtdbdat:   mtdbdat)))
    (dbfile:set-subdb dbstruct run-id newsubdb)
    newsubdb)) ;; return the new subdb - but shouldn't really use it

;; returns dbdat with dbh and dbfilepath
;;
;; NOTE: the handle is on /tmp db file!
;;
;;  1. if needed setup the subdb for the given run-id
;;  2. if there is no existing db handle in the stack
;;     create a new handle and return it (do NOT add
;;     it to the stack).
;;
(define (dbfile:open-db dbstruct run-id init-proc)
  (let* ((subdb (dbfile:get-subdb dbstruct run-id)))
    (if (not subdb) ;; not yet defined
	(begin
	  (dbfile:init-subdb dbstruct run-id init-proc)
	  (dbfile:open-db dbstruct run-id init-proc))
	(let* ((dbdat (dbfile:get-dbdat dbstruct run-id)))
	  (if dbdat
	      dbdat
	      (let* ((tmppath   (dbr:dbstruct-tmppath  dbstruct))
		     (tmpdbpath (dbfile:run-id->path tmppath run-id))
		     (dbdat     (dbfile:open-sqlite3-db tmpdbpath init-proc sync-mode: 0 journal-mode: "WAL")))
		;; the following line short-circuits the "one db handle per thread" model
		;; 
		;; (dbfile:add-dbdat dbstruct run-id dbdat)
		;;
		dbdat))))))
    
;; COMBINE dbfile:open-sqlite-db and dbfile:lock-create-open
;;

;; this stuff is for initial debugging, please remove it when
;; this code stabilizes
(define *dbopens* (make-hash-table))
(define (dbfile:inc-db-open dbfile)
  (let* ((curr-opens-count (+ (hash-table-ref/default *dbopens* dbfile 0) 1)))
    (if (and (> curr-opens-count 1) ;; this should NOT be happening
	     (common:low-noise-print 15 "db-opens"))
	(dbfile:print-err "INFO: db "dbfile" has been opened "curr-opens-count" times!"))
    (hash-table-set! *dbopens* dbfile curr-opens-count)
    curr-opens-count))

;; Open the classic megatest.db file (defaults to open in toppath)
;;
;;   NOTE: returns a dbdat not a dbstruct!
;;
(define (dbfile:open-sqlite3-db dbpath init-proc #!key (sync-mode 0)(journal-mode #f))
  (let* ((dbexists     (file-exists? dbpath))
	 (write-access (file-write-access? dbpath))
	 (db           (dbfile:cautious-open-database dbpath init-proc sync-mode journal-mode)))
    (dbfile:inc-db-open dbpath)
    ;; (init-proc db)
    (make-dbr:dbdat dbfile: dbpath dbh: db read-only: (not write-access))))

(define (dbfile:print-and-exit . params)
  (with-output-to-port
      (current-error-port)
    (lambda ()
      (apply print params)))
  (exit 1))
    
(define (dbfile:print-err . params)
  (with-output-to-port
      (current-error-port)
    (lambda ()
      (apply print params))))

(define (dbfile:cautious-open-database fname init-proc sync-mode journal-mode #!optional (tries-left 500))
  (let* ((busy-file  (conc fname "-journal"))
	 (delay-time (* (- 51 tries-left) 1.1))
      	 (write-access (file-write-access? fname))
         (dir-access (file-write-access? (pathname-directory fname)))
         (retry      (lambda ()
		       (thread-sleep! delay-time)
		       (if (> tries-left 0)
			   (dbfile:cautious-open-database fname init-proc
							  sync-mode journal-mode
							  (- tries-left 1))))))
    (assert (>= tries-left 0) (conc "FATAL: too many attempts in dbfile:cautious-open-database of "fname", giving up."))
    
    (if (and (file-write-access? fname)
	     (file-exists? busy-file))
	(begin
	  (if (common:low-noise-print 120 busy-file)
	      (dbfile:print-err "INFO: dbfile:cautious-open-database: journal file "
				busy-file" exists, trying again in few seconds."))
	  (thread-sleep! 1)
	  (if (eq? tries-left 2)
	      (begin
	  	(dbfile:print-err "INFO: forcing journal rollup "busy-file)
	  	(dbfile:brute-force-salvage-db fname)))
	  (dbfile:cautious-open-database fname init-proc sync-mode journal-mode (- tries-left 1)))
	
	(let* ((result (condition-case
		        (if dir-access
			    (dbfile:with-simple-file-lock
			     (conc fname ".lock")
			     (lambda ()
			       (let* ((db-exists (file-exists? fname))
				      (db        (sqlite3:open-database fname))) ;; creates an empty db if it did not already exist.
                                 (sqlite3:set-busy-handler! db (sqlite3:make-busy-timeout 30000))
				 (if sync-mode
				     (sqlite3:execute db (conc "PRAGMA synchronous = "sync-mode";")))
				 (if journal-mode
				     (sqlite3:execute db (conc "PRAGMA journal_mode = "journal-mode";")))
				 (if (and init-proc (not db-exists))
				     (init-proc db))
				 db)))
                            (begin
			      (if (file-exists? fname )
                                  (let ((db (sqlite3:open-database fname)))
				    ;; pragmas synchronous not needed because this db is used read-only
				    ;; (sqlite3:execute db (conc "PRAGMA synchronous = "mode";")
				    (sqlite3:set-busy-handler! db (sqlite3:make-busy-timeout 30000)) ;; read-only but still need timeout
				    db )
                                  (print "file doesn't exist: " fname))))
			(exn (io-error)
			     (dbfile:print-err exn "ERROR: i/o error with " fname ". Check permissions, disk space etc. and try again.")
			     (retry))
			(exn (corrupt)
			     (dbfile:print-err exn "ERROR: database " fname " is corrupt. Repair it to proceed.")
			     (retry))
			(exn (busy)
			     (dbfile:print-err exn "ERROR: database " fname
					       " is locked. Try copying to another location, remove original and copy back.")
			     (retry))
			(exn (permission)(dbfile:print-err exn "ERROR: database " fname " has some permissions problem.")
			     (retry))
			(exn ()
			     (dbfile:print-err exn "ERROR: Unknown error with database " fname " message: "
					       ((condition-property-accessor 'exn 'message) exn))
			     (retry)))))
	  result))))

(define (dbfile:brute-force-salvage-db fname)
  (let* ((backupfname (conc fname"-"(current-process-id)".bak"))
	 (cmd (conc "cp "fname" "backupfname";mv "fname" "(conc fname ".delme;")
		    "cp "backupfname" "fname)))
    (dbfile:print-err "WARNING: attempting recovery of file "fname" by running commands:\n"
		      "  "cmd)
    (system cmd)))


(define (dbfile:open-no-sync-db dbpath)
  (if *no-sync-db*
      *no-sync-db*
      (begin
	(if (not (file-exists? dbpath))
	    (create-directory dbpath #t))
	(let* ((dbname    (conc dbpath "/no-sync.db"))
	       (db-exists (file-exists? dbname))
	       (init-proc (lambda (db)
			    (if (not db-exists)
				(begin
				  (sqlite3:execute db "CREATE TABLE IF NOT EXISTS no_sync_metadat (var TEXT,val TEXT, CONSTRAINT no_sync_metadat_constraint UNIQUE (var));"))
				)))
	       (db        (dbfile:cautious-open-database dbname init-proc 0 "WAL"))) ;; (sqlite3:open-database dbname)))
	  ;; (sqlite3:execute db "PRAGMA synchronous = 0;")
	  ;; (sqlite3:set-busy-handler! db (sqlite3:make-busy-timeout 136000)) ;; done in cautious-open-database
	  (set! *no-sync-db* db)
	  db))))

(define (db:no-sync-set db var val)
  (sqlite3:execute db "INSERT OR REPLACE INTO no_sync_metadat (var,val) VALUES (?,?);" var val))

(define (db:no-sync-del! db var)
  (sqlite3:execute db "DELETE FROM no_sync_metadat WHERE var=?;" var))

(define (db:no-sync-get/default db var default)
  (let ((res default))
    (sqlite3:for-each-row
     (lambda (val)
       (set! res val))
     db
     "SELECT val FROM no_sync_metadat WHERE var=?;"
     var)
    (if res
        (let ((newres (if (string? res)
			  (string->number res)
			  #f)))
          (if newres
              newres
              res))
        res)))

;; transaction protected lock aquisition
;; either:
;;    fails    returns  (#f . lock-creation-time)
;;    succeeds (returns (#t . lock-creation-time)
;; use (db:no-sync-del! db keyname) to release the lock
;;
(define (db:no-sync-get-lock db keyname)
  (sqlite3:with-transaction
   db
   (lambda ()
     (condition-case
	 (let* ((curr-val (db:no-sync-get/default db keyname #f)))
	   (if curr-val
	       `(#f . ,curr-val)   ;; (sqlite3:first-result db "SELECT val FROM no_sync_metadat WHERE var=?;" keyname))
	       (let ((lock-time (current-seconds)))
		 (sqlite3:execute db "INSERT OR REPLACE INTO no_sync_metadat (var,val) VALUES(?,?);" keyname lock-time)
		 `(#t . ,lock-time))))
       (exn (io-error)  (dbfile:print-err "ERROR: i/o error with no-sync db. Check permissions, disk space etc. and try again."))
       (exn (corrupt)   (dbfile:print-err "ERROR: database no-sync db is corrupt. Repair it to proceed."))
       (exn (busy)      (dbfile:print-err "ERROR: database no-sync db is locked. Try copying to another location, remove original and copy back."))
       (exn (permission)(dbfile:print-err "ERROR: database no-sync db has some permissions problem."))
       (exn () ;; (status done) ;; I don't know how to detect status done but no data!
	    (dbfile:print-err "ERROR: Unknown error with database no-sync db message: exn="(condition->list exn)", \n"
			      ((condition-property-accessor 'exn 'message) exn))
	    `(#f . ,(current-seconds)))))))

(define (db:no-sync-get-lock-timeout db keyname timeout)
  (let* ((lockdat (db:no-sync-get-lock db keyname)))
    (match lockdat
      ((#f . lock-time)
       (if (> (- (current-seconds) (if (string? lock-time)(string->number lock-time)lock-time)) timeout)
	   (let ((lock-time (current-seconds)))
	     ;; (debug:print-info 2 *default-log-port* "db:no-sync-get-lock keyname=" keyname ", lock-time=" lock-time ", exn=" exn)
	     (sqlite3:execute db "INSERT OR REPLACE INTO no_sync_metadat (var,val) VALUES(?,?);" keyname lock-time)
	     `(#t . ,lock-time))
	   lockdat))
      (else lockdat))))

;; NOTE: This will steal the lock after timeout of waiting.
;;
(define (db:with-no-sync-lock db keyname timeout proc)
  (let* ((lockdat  (db:no-sync-get-lock-timeout db keyname))
	 (gotlock  (car lockdat))
	 (locktime (cdr lockdat)))
    (if gotlock
	(let ((res (proc)))
	  (db:no-sync-del! db keyname)
	  res))))
  
;;======================================================================
;; sync back functions pulled from db.scm
;;======================================================================

;; Get a lock from the no-sync-db for the from-db, then delta sync the from-db to the to-db, otherwise return #f
;;
(define (db:lock-and-delta-sync no-sync-db dbstruct from-db-file runid keys dbinit)
  (assert (not *db-sync-in-progress*) "FATAL: db:lock-and-sync called while a sync is in progress.")
  ;; (dbfile:print-err *default-log-port* "db:lock-and-delta-sync")
  (let* ((lock-file (conc from-db-file ".lock")))
    (if (common:simple-file-lock lock-file)
	(begin
	  (dbfile:print-err "INFO: db:lock-and-delta-sync copying db "runid" at "(current-seconds))
	  (set! *db-sync-in-progress* #t)
	  (db:sync-touched dbstruct runid keys dbinit)
	  (set! *db-sync-in-progress* #f)
	  (delete-file* lock-file)
	  #t)
        (begin
	  (if (common:low-noise-print 120 (conc "no lock "from-db-file))
	      (dbfile:print-err "INFO: could not get lock for " from-db-file ", sync likely in progress."))
	  #f
	  ))))

;; ;; Get a lock from the no-sync-db for the from-db, then delta sync the from-db to the to-db, otherwise return #f
;; ;;
;; (define (db:lock-and-delta-sync-orig no-sync-db dbstruct from-db-file runid keys dbinit)
;;   (assert (not *db-sync-in-progress*) "FATAL: db:lock-and-sync called while a sync is in progress.")
;;   ;; (dbfile:print-err *default-log-port* "db:lock-and-delta-sync")
;;   (let* ((lockdat  (db:no-sync-get-lock-timeout no-sync-db from-db-file 60))
;; 	 (gotlock  (car lockdat))
;; 	 (locktime (cdr lockdat)))
;;     ;; (debug:print-info 3 *default-log-port* "db:lock-and-delta-sync: got lock?")
;;     
;;     (if gotlock
;; 	(begin
;;           (dbfile:print-err "INFO: db:lock-and-delta-sync copying db "runid" at "(current-seconds))
;; 	  (set! *db-sync-in-progress* #t)
;;           (db:sync-touched dbstruct runid keys dbinit)
;; 	  (set! *db-sync-in-progress* #f)
;; 	  (db:no-sync-del! no-sync-db from-db-file)
;; 	  #t)
;;         (begin
;;           (dbfile:print-err "ERROR: could not get lock for " from-db-file " from no-sync-db")
;; 	  #f
;;         ))))

;; sync run from tmp disk to nfs disk if touched
;;
;; call with dbinit=db:initialize-main-db
;;
(define (db:sync-touched dbstruct run-id keys #!key dbinit (force-sync #f))
  (dbfile:print-err "db:sync-touched Syncing: " (conc (if run-id run-id "main") ".db"))
  (let* (;; the subdb is needed to access the mtdbdat
	 (subdb     (or (dbfile:get-subdb dbstruct run-id)
			(dbfile:init-subdb dbstruct run-id dbinit)))
         (tmpdbfile (dbr:subdb-tmpdbfile subdb))
	 (mtdb      (dbr:subdb-mtdbdat subdb))
         (tmpdb     (db:open-db dbstruct run-id dbinit)) ;; sqlite3-db tmpdbfile #f))
	 (start-t   (current-seconds)))
    (mutex-lock! *db-multi-sync-mutex*)
    (let ((update_info (cons "last_update" (if force-sync 0 *db-last-sync*) )))
      (mutex-unlock! *db-multi-sync-mutex*)
      (db:sync-tables (db:sync-all-tables-list dbstruct keys) update_info tmpdb mtdb))
    (mutex-lock! *db-multi-sync-mutex*)
    (set! *db-last-sync* start-t)
    (set! *db-last-access* start-t)
    (mutex-unlock! *db-multi-sync-mutex*)
    (dbfile:add-dbdat dbstruct run-id tmpdb)
  #t))

;; just tests, test_steps and test_data tables
(define db:sync-tests-only
  (list
   ;; (list "strs"
   ;;       '("id"             #f)
   ;;       '("str"            #f))
   (list "tests" 
	 '("id"             #f)
	 '("run_id"         #f)
	 '("testname"       #f)
	 '("host"           #f)
	 '("cpuload"        #f)
	 '("diskfree"       #f)
	 '("uname"          #f)
	 '("rundir"         #f)
	 '("shortdir"       #f)
	 '("item_path"      #f)
	 '("state"          #f)
	 '("status"         #f)
	 '("attemptnum"     #f)
	 '("final_logf"     #f)
	 '("logdat"         #f)
	 '("run_duration"   #f)
	 '("comment"        #f)
	 '("event_time"     #f)
	 '("fail_count"     #f)
	 '("pass_count"     #f)
	 '("archived"       #f)
         '("last_update"    #f))
  (list "test_steps"
	 '("id"             #f)
	 '("test_id"        #f)
	 '("stepname"       #f)
	 '("state"          #f)
	 '("status"         #f)
	 '("event_time"     #f)
	 '("comment"        #f)
	 '("logfile"        #f)
         '("last_update"    #f))
   (list "test_data"
	 '("id"             #f)
	 '("test_id"        #f)
	 '("category"       #f)
	 '("variable"       #f)
	 '("value"          #f)
	 '("expected"       #f)
	 '("tol"            #f)
	 '("units"          #f)
	 '("comment"        #f)
	 '("status"         #f)
	 '("type"           #f)
         '("last_update"    #f))))

;; needs db to get keys, this is for syncing all tables
;;
(define (db:sync-main-list dbstruct keys)
  (let ((keys  keys)) ;; (db:get-keys dbstruct)))
    (list
     (list "keys"
	   '("id"        #f)
	   '("fieldname" #f)
	   '("fieldtype" #f))
     (list "metadat" '("var" #f) '("val" #f))
     (append (list "runs" 
		   '("id"  #f))
	     (map (lambda (k)(list k #f))
		  (append keys
			  (list "runname" "state" "status" "owner" "event_time" "comment" "fail_count" "pass_count" "contour" "last_update"))))
     (list "archive_disks"
           '("id" #f)
           '("archive_area_name" #f) 
           '("disk_path" #f)
           '("last_df" #f)
           '("last_df_time" #f)
           '("creation_time" #f)) 

     (list "archive_blocks"
           '("id" #f)
           '("archive_disk_id" #f) 
           '("disk_path" #f)
           '("last_du" #f)
           '("last_du_time" #f)
           '("creation_time" #f)) 

     (list "test_meta"
	   '("id"             #f)
	   '("testname"       #f)
	   '("owner"          #f)
	   '("description"    #f)
	   '("reviewed"       #f)
	   '("iterated"       #f)
	   '("avg_runtime"    #f)
	   '("avg_disk"       #f)
	   '("tags"           #f)
	   '("jobgroup"       #f))


     (list "tasks_queue"
           '("id"            #f)
           '("action"        #f)
           '("owner"         #f) 
           '("state"         #f)
           '("target"        #f)
           '("name"          #f)
           '("testpatt"      #f)
           '("keylock"       #f)
           '("params"        #f)
           '("creation_time" #f)
           '("execution_time" #f))
     )))

(define (db:sync-all-tables-list dbstruct keys)
  (append (db:sync-main-list dbstruct keys)
	  db:sync-tests-only))

;; tbls is ( ("tablename" ( "field1" [#f|proc1] ) ( "field2" [#f|proc2] ) .... ) )
;; db's are dbdat's
;;
;; if last-update specified ("field-name" . time-in-seconds)
;;    then sync only records where field-name >= time-in-seconds
;;    IFF field-name exists
;;
(define (db:sync-tables tbls last-update fromdb todb . slave-dbs)
  (handle-exceptions
   exn
   (begin
     (dbfile:print-err  "EXCEPTION: database probably overloaded or unreadable in db:sync-tables.")
     (print-call-chain (current-error-port))
     (dbfile:print-err  " message: " ((condition-property-accessor 'exn 'message) exn))
     (dbfile:print-err  "exn=" (condition->list exn))
     (dbfile:print-err  " status:  " ((condition-property-accessor 'sqlite3 'status) exn))
     (dbfile:print-err  " src db:  " (dbr:dbdat-dbfile fromdb))
     (for-each (lambda (dbdat)
		 (let ((dbpath (dbr:dbdat-dbfile dbdat)))
		   (dbfile:print-err  " dbpath:  " dbpath)
		   (if #t ;; (not (db:repair-db dbdat))
		       (begin
			 (dbfile:print-err "Failed to rebuild (repair is turned off) " dbpath ", exiting now.")
			 (exit)))))
	       (cons todb slave-dbs))
     
     0)

   ;; this is the work to be done")
   (cond
    ((not fromdb) (dbfile:print-err  "WARNING: db:sync-tables called with fromdb missing")
     -1)
    ((not todb)   (dbfile:print-err  "WARNING: db:sync-tables called with todb missing")
     -2)
    ((not (sqlite3:database? (dbr:dbdat-dbh fromdb)))
     (dbfile:print-err "db:sync-tables called with fromdb not a database " fromdb)
   -3)
    ((not (sqlite3:database? (dbr:dbdat-dbh todb)))
     (dbfile:print-err "db:sync-tables called with todb not a database " todb)
   -4)

    ((not (file-write-access? (dbr:dbdat-dbfile todb)))
     (dbfile:print-err "db:sync-tables called with todb not a read-only database " todb)
     -5)
    ((not (null? (let ((readonly-slave-dbs
                        (filter
                         (lambda (dbdat)
                           (not (file-write-access? (dbr:dbdat-dbfile todb))))
                         slave-dbs)))
                   (for-each
                    (lambda (bad-dbdat)
                      (dbfile:print-err "db:sync-tables called with todb not a read-only database " bad-dbdat))
                    readonly-slave-dbs)
                   readonly-slave-dbs))) -6)
    (else
     ;; (dbfile:print-err "db:sync-tables: args are good")

     (let ((stmts       (make-hash-table)) ;; table-field => stmt
	   (all-stmts   '())              ;; ( ( stmt1 value1 ) ( stml2 value2 ))
	   (numrecs     (make-hash-table))
	   (start-time  (current-milliseconds))
	   (tot-count   0))
       (for-each ;; table
	(lambda (tabledat)
	  (let* ((tablename        (car tabledat))
		 (fields           (cdr tabledat))
		 (has-last-update  (member "last_update" fields))
		 (use-last-update  (cond
				    ((and has-last-update
					  (member "last_update" fields))
				     #t) ;; if given a number, just use it for all fields
				    ((number? last-update) #f) ;; if not matched first entry then ignore last-update for this table
				    ((and (pair? last-update)
					  (member (car last-update)    ;; last-update field name
						  (map car fields)))
                                        #t)
				    ((and last-update (not (pair? last-update)) (not (number? last-update)))
				     (dbfile:print-err  "ERROR: parameter last-update for db:sync-tables must be a pair or a number, received: " last-update);; found in fields
				     #f)
				    (else
				     #f)))
		 (last-update-value (if use-last-update ;; no need to check for has-last-update - it is already accounted for
					(if (number? last-update)
					    last-update
					    (cdr last-update))
					#f))
		 (last-update-field (if use-last-update
					(if (number? last-update)
					    "last_update"
					    (car last-update))
					#f))
		 (num-fields (length fields))
		 (field->num (make-hash-table))
		 (num->field (apply vector (map car fields))) ;; BBHERE
		 (full-sel   (conc "SELECT " (string-intersperse (map car fields) ",") 
				   " FROM " tablename (if use-last-update ;; apply last-update criteria
							  (conc " WHERE " last-update-field " >= " last-update-value)
							  "")
				   ";"))
		 (full-ins   (conc "INSERT OR REPLACE INTO " tablename " ( " (string-intersperse (map car fields) ",") " ) "
				   " VALUES ( " (string-intersperse (make-list num-fields "?") ",") " );"))
		 (fromdat    '())
		 (fromdats   '())
		 (totrecords 0)
		 (batch-len  100) ;; (string->number (or (configf:lookup *configdat* "sync" "batchsize") "100")))
		 (todat      (make-hash-table))
		 (count      0)
                 (field-names (map car fields))
                 (delay-handicap  0) ;; (string->number (or (configf:lookup *configdat* "sync" "delay-handicap") "0")))
                 )

	    ;; set up the field->num table
	    (for-each
	     (lambda (field)
	       (hash-table-set! field->num field count)
	       (set! count (+ count 1)))
	     fields)

	    ;; read the source table
            ;; store a list of all rows in the table in fromdat, up to batch-len.
            ;; Then add fromdat to the fromdats list, clear fromdat and repeat.
	    (sqlite3:for-each-row
	     (lambda (a . b)
	       (set! fromdat (cons (apply vector a b) fromdat))
	       (if (> (length fromdat) batch-len)
		   (begin
		     (set! fromdats (cons fromdat fromdats))
		     (set! fromdat  '())
		     (set! totrecords (+ totrecords 1)))
               )
             )
	     (dbr:dbdat-dbh fromdb)
	     full-sel)

             ;; Count less than batch-len as a record
             (if (> (length fromdat) 0)
                 (set! totrecords (+ totrecords 1)))

	    ;; tack on remaining records in fromdat
	    (if (not (null? fromdat))
		(set! fromdats (cons fromdat fromdats)))

	    (sqlite3:for-each-row
	     (lambda (a . b)
	       (hash-table-set! todat a (apply vector a b)))
	     (dbr:dbdat-dbh todb)
	     full-sel)

            (when (and delay-handicap (> delay-handicap 0))
              (dbfile:print-err "imposing synthetic sync delay of "delay-handicap" seconds since sync/delay-handicap is configured")
              (thread-sleep! delay-handicap)
              (dbfile:print-err "synthetic sync delay of "delay-handicap" seconds completed")
              )
            
	    ;; first pass implementation, just insert all changed rows

	    (for-each 
	     (lambda (targdb)
	       (let* ((db                 (dbr:dbdat-dbh targdb))
                      (drp-trigger        (if (member "last_update" field-names)
					      (db:drop-trigger db tablename) 
					      #f))
		      (has-last-update    (member "last_update" field-names))
                      (is-trigger-dropped (if has-last-update
                                              (db:is-trigger-dropped db tablename)
					      #f)) 
		      (stmth  (sqlite3:prepare db full-ins))
                      (changed-rows 0))
		 (for-each
		  (lambda (fromdat-lst)
		    (sqlite3:with-transaction
		     db
		     (lambda ()
		       (for-each ;; 
			(lambda (fromrow)
			  (let* ((a    (vector-ref fromrow 0))
				 (curr (hash-table-ref/default todat a #f))
				 (same #t))
			    (let loop ((i 0))
			      (if (or (not curr)
				      (not (equal? (vector-ref fromrow i)(vector-ref curr i))))
				  (set! same #f))
			      (if (and same
				       (< i (- num-fields 1)))
				  (loop (+ i 1))))
			    (if (not same)
				(begin
				  (apply sqlite3:execute stmth (vector->list fromrow))
				  (hash-table-set! numrecs tablename (+ 1 (hash-table-ref/default numrecs tablename 0)))
                                  (set! changed-rows (+ changed-rows 1))
                                )
                            )
                            ))
			fromdat-lst))))
		  fromdats)

		 (sqlite3:finalize! stmth)
                 (if (member "last_update" field-names)
                    (db:create-trigger db tablename))))
	     (append (list todb) slave-dbs)
           )
          )
        )
	tbls)
       (let* ((runtime      (- (current-milliseconds) start-time))
	      (should-print (or ;; (debug:debug-mode 12)
			     (common:low-noise-print 120 "db sync")
			     (> runtime 500)))) ;; low and high sync times treated as separate.
	 (for-each 
	  (lambda (dat)
	    (let ((tblname (car dat))
		  (count   (cdr dat)))
	      (set! tot-count (+ tot-count count))
              )) 
	  (sort (hash-table->alist numrecs)(lambda (a b)(> (cdr a)(cdr b))))))
       tot-count)))))

;;======================================================================
;; trigger setup/takedown
;;======================================================================

(define db:trigger-list 
     (list (list "update_runs_trigger"  "CREATE TRIGGER IF NOT EXISTS update_runs_trigger AFTER UPDATE ON runs
                             FOR EACH ROW
                               BEGIN 
                                 UPDATE runs SET last_update=(strftime('%s','now'))
                                   WHERE id=old.id;
                               END;" ) 
	   (list "update_run_stats_trigger"  "CREATE TRIGGER  IF NOT EXISTS update_run_stats_trigger AFTER UPDATE ON run_stats
                             FOR EACH ROW
                               BEGIN 
                                 UPDATE run_stats SET last_update=(strftime('%s','now'))
                                   WHERE id=old.id;
                               END;" )
	   (list "update_tests_trigger"  "CREATE TRIGGER  IF NOT EXISTS update_tests_trigger AFTER UPDATE ON tests
                             FOR EACH ROW
                               BEGIN 
                                 UPDATE tests SET last_update=(strftime('%s','now'))
                                   WHERE id=old.id;
                               END;" )
	   (list "update_teststeps_trigger"  "CREATE TRIGGER  IF NOT EXISTS update_teststeps_trigger AFTER UPDATE ON test_steps
                             FOR EACH ROW
                               BEGIN 
                                 UPDATE test_steps SET last_update=(strftime('%s','now'))
                                   WHERE id=old.id;
                               END;" )
	   (list "update_test_data_trigger"  "CREATE TRIGGER  IF NOT EXISTS update_test_data_trigger AFTER UPDATE ON test_data
                             FOR EACH ROW
                               BEGIN 
                                 UPDATE test_data SET last_update=(strftime('%s','now'))
                                   WHERE id=old.id;
                               END;" )))
;;
;; ADD run-id SUPPORT
;;
(define (db:create-all-triggers dbstruct)
  (db:with-db
   dbstruct #f #f
   (lambda (dbdat db)
     (db:create-triggers db))))

(define (db:create-triggers db)
    (for-each (lambda (key)
              (sqlite3:execute db (cadr key)))
          db:trigger-list))

(define (db:drop-all-triggers dbstruct)
  (db:with-db
   dbstruct #f #f
   (lambda (dbdat db)
     (db:drop-triggers db))))

(define (db:is-trigger-dropped db tbl-name)
  (let* ((trigger-name (if (equal? tbl-name "test_steps")
			   "update_teststeps_trigger" 
                           (conc "update_" tbl-name "_trigger")))
	 (res          #f))
    (sqlite3:for-each-row
     (lambda (name)
       (if (equal? name trigger-name)
	   (set! res #t)))
     db 
     "SELECT name FROM sqlite_master WHERE type = 'trigger' ;")
    res))

(define (db:drop-triggers db)
  (for-each
   (lambda (key) 
     (sqlite3:execute db (conc "drop trigger if exists " (car key))))
   db:trigger-list))

(define  (db:drop-trigger db tbl-name)
  (let* ((trigger-name (if (equal? tbl-name "test_steps")
			   "update_teststeps_trigger" 
                           (conc "update_" tbl-name "_trigger"))))
    (for-each
     (lambda (key) 
       (if (equal? (car key) trigger-name)
           (sqlite3:execute db (conc "drop trigger if exists " trigger-name))))
     db:trigger-list)))

(define  (db:create-trigger db tbl-name)
      (let* ((trigger-name (if (equal? tbl-name "test_steps")
                              "update_teststeps_trigger" 
                              (conc "update_" tbl-name "_trigger"))))
       (for-each (lambda (key) 
             (if (equal? (car key) trigger-name)
             (sqlite3:execute db (cadr key))))
      db:trigger-list))) 

;;======================================================================
;; db access stuff
;;======================================================================

;; call with dbinit=db:initialize-main-db
;;
(define (db:open-db dbstruct run-id dbinit)
  ;; (mutex-lock! *db-open-mutex*)
  (let* ((dbdat (dbfile:open-db dbstruct run-id dbinit)))
    (set! *db-write-access* (not (dbr:dbdat-read-only dbdat)))
    ;; (mutex-unlock! *db-open-mutex*)
    dbdat))

(define dbfile:db-init-proc (make-parameter #f))

;; in xmaxima this gives a curve close to what I want:
;;    plot2d ((exp(x/1.2)-1)/300, [x, 0, 10])$
;;    plot2d ((exp(x/1.5)-1)/40, [x, 0, 10])$
;;    plot2d ((exp(x/5)-1)/40, [x, 0, 20])$
(define (dbfile:droop x)
  (/ (- (exp (/ x 5)) 1) 40))
  ;; (* numqrys (/ 1 (qif-slope))))

;; create a dropping near the db file in a qif dir
;; use count of such files to gate queries (queries in flight)
;;
(define (dbfile:wait-for-qif fname run-id params)
  (let* ((thedir  (pathname-directory fname))
	 (dbnum   (dbfile:run-id->dbnum run-id))
	 (destdir (conc thedir"/qif-"dbnum))
	 (uniqn   (get-area-path-signature (conc dbnum params)))
	 (crumbn  (conc destdir"/"(current-seconds)"-"uniqn"."(current-process-id))))
    (if (not (file-exists? destdir))(create-directory (conc destdir"/attic") #t))
    (let loop ((count 0))
      (let* ((currlks (glob (conc destdir"/*")))
	     (numqrys (length currlks))
	     (delayval (cond ;; do a droopish curve
			((> numqrys 25)
			 (for-each
			  (lambda (f)
			    (if (> (- (current-seconds)
				      (handle-exceptions
					  exn
					(current-seconds) ;; file is likely gone, just fake out
					(file-modification-time f)))
				   (keep-age-param))
				(let* ((basedir (pathname-directory f))
				       (filen   (pathname-file f))
				       (destf   (conc basedir"/attic/"filen)))
				  (dbfile:print-err "Moving qif file "f" older than 10 seconds to "destf)
				  ;; (delete-file* f)
				  (handle-exceptions
				      exn
				    #t
				    (file-move f destf #t)))))
			  currlks)
			 4)
			((> numqrys 0)  (dbfile:droop numqrys)) ;; slope of 1/100
			(else #f))))
	(if (and delayval
		 (< count 5))
	    (begin
	      (thread-sleep! delayval)
	      (loop (+ count 1))))))
    (with-output-to-file crumbn
      (lambda ()
	(print fname" run-id="run-id" params="params)
	))
    crumbn))

(define no-condition-db-with-db (make-parameter #t))

;; (db:with-db dbstruct run-id sqlite3:exec "select blah fgrom blaz;")
;; r/w is a flag to indicate if the db is modified by this query #t = yes, #f = no
;;
(define (db:with-db dbstruct run-id r/w proc . params)
  (assert dbstruct "FATAL: db:with-db called with dbstruct "#f)
  (assert (dbr:dbstruct? dbstruct) "FATAL: dbstruct is "dbstruct)
  (let* ((use-mutex (> *api-process-request-count* 25)) ;; risk of db corruption
	 (have-struct (dbr:dbstruct? dbstruct))
         (dbdat     (if have-struct                ;; this stuff just allows us to call with a db handle directly
			(db:open-db dbstruct run-id (dbfile:db-init-proc)) ;; (dbfile:get-subdb dbstruct run-id)
			#f))
	 (db        (if have-struct                ;; this stuff just allows us to call with a db handle directly
			(dbr:dbdat-dbh dbdat)
			dbstruct))
	 (fname     (if dbdat
			(dbr:dbdat-dbfile dbdat)
			"nofilenameavailable"))
	 (jfile     (conc fname"-journal"))
	 (qryproc   (lambda ()
		      (if use-mutex (mutex-lock! *db-with-db-mutex*))
		      (let ((res (apply proc dbdat db params))) ;; the actual call is here.
			(if use-mutex (mutex-unlock! *db-with-db-mutex*))
			;; (if (vector? dbstruct)(db:done-with dbstruct run-id r/w))
			(if dbdat
			    (dbfile:add-dbdat dbstruct run-id dbdat))
			;; (delete-file* crumbfile)
			res))))

    (assert (sqlite3:database? db) "FATAL: db:with-db, db is not a database, db="db", fname="fname)
    (if (file-exists? jfile)
	(begin
	  (dbfile:print-err "INFO: "jfile" exists, delaying to reduce database load")
	  (thread-sleep! 0.2)))
    (if (and use-mutex
	     (common:low-noise-print 120 "over-50-parallel-api-requests"))
	(dbfile:print-err *api-process-request-count* " parallel api requests being processed in process "
			  (current-process-id))) ;;  ", throttling access"))
    (if (no-condition-db-with-db)
	(qryproc)
	(condition-case
	 (qryproc)
	 (exn (io-error)
	      (db:generic-error-printout exn "ERROR: i/o error with " fname ". Check permissions, disk space etc. and try again."))
	 (exn (corrupt)
	      (db:generic-error-printout exn "ERROR: database " fname " is corrupt. Repair it to proceed."))
	 (exn (busy)
	      (db:generic-error-printout exn "ERROR: database " fname
					 " is locked. Try copying to another location, remove original and copy back."))
	 (exn (permission)(db:generic-error-printout exn "ERROR: database " fname " has some permissions problem."))
	 (exn ()
	      (db:generic-error-printout exn "ERROR: Unknown error with database " fname " message: "
					 ((condition-property-accessor 'exn 'message) exn)))))))

;;======================================================================
;; another attempt at a transactionized queue
;;======================================================================

;; ;; ;; (define *transaction-queues* (make-hash-table))
;; ;; ;; 
;; ;; ;; (define (db:get-queue run-id)
;; ;; ;;   (let* ((res (hash-table-ref/default *transaction-queues* run-id #f)))
;; ;; ;;     (if res
;; ;; ;; 	res
;; ;; ;; 	(let* ((newq (make-queue)))
;; ;; ;; 	  (hash-table-set! *transaction-queues* run-id newq)
;; ;; ;; 	  newq))))
;; ;; ;; 
;; ;; ;; (define (db:add-to-transaction-queue dbstruct proc params)
;; ;; ;;   (let* ((mbox (make-mailbox))
;; ;; ;; 	 (q    (db:get-queue run-id)))
;; ;; ;;     (queue-add! *transaction-queue* (list dbstruct proc mbox))
;; ;; ;;     (mailbox-receive mbox)))
;; ;; ;; 
;; ;; ;; (define (db:process-transaction-queue *dbstruct-dbs*)
;; ;; ;;   (for-each
;; ;; ;;    (lambda (run-id)
;; ;; ;;      (let* ((q (hash-table-ref *transaction-queue* run-id)))
;; ;; ;;        ;; with-transaction
;; ;; ;;        ;;     dbstruct
;; ;; ;;        ;; pop items from queue and execute them, return results via mailbox
;; ;; ;;        q
;; ;; ;;        ;; pop 
;; ;; ;;        ))
;; ;; ;;    (hash-table-keys *transaction-queues*)))

;;======================================================================
;; file utils
;;======================================================================

;;======================================================================
;; lazy-safe get file mod time. on any error (file not existing etc.) return 0
;;
(define (dbfile:lazy-modification-time fpath)
  (handle-exceptions
      exn
    (begin
      (dbfile:print-err "Failed to get modification time for " fpath ", treating it as zero. exn=" exn)
      0)
    (if (file-exists? fpath)
	(file-modification-time fpath)
	0)))

;;======================================================================
;; find timestamp of newest file associated with a sqlite db file
(define (dbfile:lazy-sqlite-db-modification-time fpath)
  (let* ((glob-list (handle-exceptions
			exn
		      (begin
			(dbfile:print-err "Failed to glob " fpath "*, exn=" exn)
			`(,(conc "/no/such/file, message: " ((condition-property-accessor 'exn 'message) exn))))
		      (glob (conc fpath "*"))))
         (file-list (if (eq? 0 (length glob-list))
			'("/no/such/file")
			glob-list)))
  (apply max
	 (map
	  dbfile:lazy-modification-time 
	  file-list))))

;; dot-locking egg seems not to work, using this for now
;; if lock is older than expire-time then remove it and try again
;; to get the lock
;;
(define (dbfile:simple-file-lock fname #!key (expire-time 300))
  (let ((fmod-time (handle-exceptions
		       ext
		     (current-seconds)
		     (file-modification-time fname))))
    (if (file-exists? fname)
	(if (> (- (current-seconds) fmod-time) expire-time)
	    (begin
	      (handle-exceptions exn #f (delete-file* fname))	
	      (dbfile:simple-file-lock fname expire-time: expire-time))
	    #f)
	(let ((key-string (conc (get-host-name) "-" (current-process-id)))
	      (oup        (open-output-file fname)))
	  (with-output-to-port
	      oup
	    (lambda ()
	      (print key-string)))
	  (close-output-port oup)
	  #;(with-output-to-file fname ;; bizarre. with-output-to-file does not seem to be cleaning up after itself.
	    (lambda ()
	  (print key-string)))
	  (thread-sleep! 0.25)
	  (if (file-exists? fname)
	      (handle-exceptions exn
                #f 
                (with-input-from-file fname
	  	  (lambda ()
		    (equal? key-string (read-line)))))
	      #f)
       )
    )
  )
)

(define (dbfile:simple-file-lock-and-wait fname #!key (expire-time 300))
  (let ((end-time (+ expire-time (current-seconds))))
    (let loop ((got-lock (dbfile:simple-file-lock fname expire-time: expire-time)))
      (if got-lock
	  #t
	  (if (> end-time (current-seconds))
	      (begin
		(thread-sleep! 3)
		(loop (dbfile:simple-file-lock fname expire-time: expire-time)))
	      #f)))))

(define (dbfile:simple-file-release-lock fname)
  (handle-exceptions
      exn
      #f ;; I don't really care why this failed (at least for now)
    (delete-file* fname)))

(define (dbfile:with-simple-file-lock fname proc #!key (expire-time 300))
  (let ((gotlock (dbfile:simple-file-lock-and-wait fname expire-time: expire-time)))
    (if gotlock
	(let ((res (proc)))
	  (dbfile:simple-file-release-lock fname)
	  res)
	(assert #t "FATAL: simple file lock never got a lock."))))
  
(define (db:get-cache-stmth dbdat db stmt)
  (let* (;; (dbdat       (dbfile:get-dbdat dbstruct run-id))
	 (stmt-cache  (dbr:dbdat-stmt-cache dbdat))
	 ;; (stmth       (db:hoh-get stmt-cache db stmt))
	 (stmth       (hash-table-ref/default stmt-cache stmt #f)))
    (or stmth
	(let* ((newstmth (sqlite3:prepare db stmt)))
	  ;; (db:hoh-set! stmt-cache db stmt newstmth)
	  (hash-table-set! stmt-cache stmt newstmth)
	  newstmth))))

(define (db:have-incompletes? dbstruct run-id ovr-deadtime)
  (let* ((incompleted '())
	 (oldlaunched '())
	 (toplevels   '())
	 ;; (deadtime-str (configf:lookup *configdat* "setup" "deadtime"))
	 (deadtime  (or ovr-deadtime 72000))) ;; twenty hours
    (db:with-db
     dbstruct run-id #f
     (lambda (dbdat db)
       
       ;; in RUNNING or REMOTEHOSTSTART for more than 10 minutes
       ;;
       ;; HOWEVER: this code in run:test seems to work fine
       ;;              (> (- (current-seconds)(+ (db:test-get-event_time testdat)
       ;;                     (db:test-get-run_duration testdat)))
       ;;                    600) 
       ;; (db:delay-if-busy dbdat)
       (sqlite3:for-each-row 
        (lambda (test-id run-dir uname testname item-path)
          (if (and (equal? uname "n/a")
                   (equal? item-path "")) ;; this is a toplevel test
              ;; what to do with toplevel? call rollup?
              (begin
                (set! toplevels   (cons (list test-id run-dir uname testname item-path run-id) toplevels)))
                ;; (print-info "Found old toplevel test in RUNNING state, test-id=" test-id))
              (set! incompleted (cons (list test-id run-dir uname testname item-path run-id) incompleted))))
        (db:get-cache-stmth dbdat db
        "SELECT id,rundir,uname,testname,item_path FROM tests WHERE run_id=? AND (strftime('%s','now') - event_time) > (run_duration + ?) AND state IN ('RUNNING','REMOTEHOSTSTART');")
        run-id deadtime)

       ;; in LAUNCHED for more than one day. Could be long due to job queues TODO/BUG: Need override for this in config
       ;;
       ;; (db:delay-if-busy dbdat)
       (sqlite3:for-each-row
        (lambda (test-id run-dir uname testname item-path)
          (if (and (equal? uname "n/a")
                   (equal? item-path "")) ;; this is a toplevel test
              ;; what to do with toplevel? call rollup?
              (set! toplevels   (cons (list test-id run-dir uname testname item-path run-id) toplevels))
              (set! oldlaunched (cons (list test-id run-dir uname testname item-path run-id) oldlaunched))))
        (db:get-cache-stmth dbdat db
        "SELECT id,rundir,uname,testname,item_path FROM tests WHERE run_id=? AND (strftime('%s','now') - event_time) > 86400 AND state IN ('LAUNCHED');")
        run-id)
       
       ;; (print-info "Found " (length oldlaunched) " old LAUNCHED items, " (length toplevels) " old LAUNCHED toplevel tests and " (length incompleted) " tests marked RUNNING but apparently dead.")
       (if (and (null? incompleted)
                (null? oldlaunched)
                (null? toplevels))
           #f
           #t)))))


)

;; 
;;     You should have received a copy of the GNU General Public License
;;     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.

;;======================================================================

(declare (unit dbmod))
(declare (uses dbfile))
(declare (uses commonmod))
(declare (uses debugprint))

(module dbmod
	*
	
(import scheme
	chicken
	data-structures
	extras

	(prefix sqlite3 sqlite3:)
	posix
	typed-records
	srfi-18
	srfi-69

	commonmod
	dbfile
	debugprint
	)

;; NOTE: This returns only the name "1.db", "main.db", not the path
;;
(define (dbmod:run-id->dbfname run-id)
  (conc (dbfile:run-id->dbnum run-id)".db"))

(define (dbmod:get-dbdir dbstruct run-id)
  (let* ((areapath (dbr:dbstruct-areapath dbstruct)))
    (conc areapath"/.megatest")))

(define (dbmod:run-id->full-dbfname dbstruct run-id)
  (conc (dbmod:get-dbdir dbstruct run-id)"/"(dbmod:run-id->dbfname run-id)))

;;======================================================================

;; The inmem one-db file per server method goes in here
;;======================================================================

(define (dbmod:with-db dbstruct run-id r/w proc params)
  (let* ((dbdat  (dbmod:open-db dbstruct run-id (dbfile:db-init-proc)))
	 (dbh    (dbr:dbdat-dbh dbdat))
	 (dbfile (dbr:dbdat-dbfile dbdat)))
    (apply proc dbdat dbh params)))

(define (dbmod:open-inmem-db initproc)
  (let* ((db      (sqlite3:open-database ":memory:"))
	 (handler (sqlite3:make-busy-timeout 3600)))
    (sqlite3:set-busy-handler! db handler)
    (initproc db)
    db))

(define (dbmod:open-db dbstruct run-id dbinit)
  (or (dbr:dbstruct-dbdat dbstruct)
      (let* ((dbdat (make-dbr:dbdat
		     dbfile: (dbr:dbstruct-dbfile dbstruct)
		     dbh:    (dbr:dbstruct-inmem  dbstruct)
		     )))
	(dbr:dbstruct-dbdat-set! dbstruct dbdat)
	dbdat)))

;; Open the inmem db and the on-disk db
;; populate the inmem db with data
;;
;; Updates fields in dbstruct
;; Returns dbstruct
;;
;; * This routine creates the db if not found
;; * Probably can get rid of the dbstruct-in
;; 
(define (dbmod:open-dbmoddb areapath run-id init-proc #!key (dbstruct-in #f)) ;;  (conc *toppath* "/megatest.db") (car *configinfo*)))
  (let* ((dbstruct     (or dbstruct-in (make-dbr:dbstruct areapath: areapath)))
	 (dbfname      (dbmod:run-id->dbfname run-id))
	 (dbpath       (dbmod:get-dbdir dbstruct run-id))             ;; directory where all the .db files are kept
	 (dbfullname   (dbmod:run-id->full-dbfname dbstruct run-id))
	 (dbexists     (file-exists? dbfullname))
	 (inmem        (dbmod:open-inmem-db init-proc))
	 (write-access (file-write-access? dbpath))
	 (db           (dbfile:with-simple-file-lock
			(conc dbfullname".lock")
			(lambda ()
			  (let* ((db      (sqlite3:open-database dbfullname))
				 (handler (sqlite3:make-busy-timeout 136000)))
			    (sqlite3:set-busy-handler! db handler)
			    (if write-access

				(init-proc db))
			    db)))))
    (dbr:dbstruct-inmem-set!    dbstruct inmem)
    (dbr:dbstruct-ondiskdb-set! dbstruct db)
    (dbr:dbstruct-dbfile-set!   dbstruct dbfullname)
    dbstruct))

(define (dbmod:close-db dbstruct)
  ;; do final sync to disk file
  ;; (do-sync ...)
  (sqlite3:finalize! (dbr:dbstruct-ondiskdb dbstruct)))

;;======================================================================
;; Moved from dbfile
;;======================================================================


)

(declare (unit launch))
(declare (uses subrun))
(declare (uses common))
(declare (uses commonmod))
(declare (uses configf))
(declare (uses db))
(declare (uses ezsteps))
(declare (uses dbfile))

(include "common_records.scm")
(include "key_records.scm")
(include "db_records.scm")
(include "megatest-fossil-hash.scm")

(import commonmod
	dbfile)

;;======================================================================
;; ezsteps
;;======================================================================

;; ezsteps were going to be coded as
;; stepname[,predstep1,predstep2 ...] [{VAR1=first,second,third}] command to execute

	    (begin
	      (setenv "MT_RUN_AREA_HOME" *toppath*)
	      (setenv "MT_TESTSUITENAME" (common:get-testsuite-name)))
	    (begin
	      (debug:print-error 0 *default-log-port* "failed to find the top path to your Megatest area.")
	      (set! *toppath* #f) ;; force it to be false so we return #f
	      #f))

	;; needed by various transport and db modules
	(dbfile:testsuite-name (common:get-testsuite-name)) ;; (get-testsuite-name *toppath* *configdat*))

        ;; one more attempt to cache the configs for future reading
        (let* ((cachefiles   (launch:get-cache-file-paths areapath toppath target mtconfig))
               (mtcachef     (car cachefiles))
               (rccachef     (cdr cachefiles)))

          ;; trap exception due to stale NFS handle -- Error: (open-output-file) cannot open file - Stale NFS file handle: "...somepath.../.runconfigs.cfg-1.6427-7d1e789cb3f62f9cde719a4865bb51b3c17ea853" - ticket 220546342
          ;; TODO - consider 1) using simple-lock to bracket cache write

(define args:arg-hash (make-hash-table))

(define (args:get-arg arg . default)
  (if (null? default)
      (hash-table-ref/default args:arg-hash arg #f)
      (hash-table-ref/default args:arg-hash arg (car default))))

;; get an arg as a number
(define (args:get-arg-number arg . default)
  (let* ((val-str (args:get-arg arg))
	 (val     (if val-str (string->number val-str) #f)))
    (if val
	val
	(if (null? default)
	    #f
	    default))))

(define (args:any? . args)
  (not (null? (filter (lambda (x) x)
		      (map args:get-arg args)))))

(define (args:get-arg-from ht arg . default)
  (if (null? default)

;; fake out readline usage of toplevel-command
(define (toplevel-command . a) #f)

(declare (uses common))
;; (declare (uses megatest-version))
(declare (uses margs))
(declare (uses mtargs))
(declare (uses mtargs.import))
(declare (uses commonmod))
(declare (uses commonmod.import))
(declare (uses mtargs))
(declare (uses mtargs.import))
(declare (uses debugprint))
(declare (uses debugprint.import))
(declare (uses runs))
(declare (uses launch))
(declare (uses server))
(declare (uses client))
(declare (uses tests))
(declare (uses genexample))
;; (declare (uses daemon))

(declare (uses db))
;; (declare (uses dcommon))

(declare (uses tdb))
(declare (uses mt))
(declare (uses api))
(declare (uses tasks)) ;; only used for debugging.
(declare (uses env))
(declare (uses diff-report))
(declare (uses db))
(declare (uses dbfile))
(declare (uses dbfile.import))
(declare (uses dbmod))
(declare (uses dbmod.import))
(declare (uses tcp-transportmod))
(declare (uses tcp-transportmod.import))
;; (declare (uses debugprint))
;; (declare (uses debugprint.import))



;; (declare (uses ftail))
;; (import ftail)

(import mtargs
        debugprint
	dbmod
	commonmod
	dbfile
	tcp-transportmod
        )

(define *db* #f) ;; this is only for the repl, do not use in general!!!!

(include "common_records.scm")
(include "key_records.scm")
(include "db_records.scm")
(include "run_records.scm")
(include "megatest-fossil-hash.scm")

(use (prefix sqlite3 sqlite3:) srfi-1 posix regex regex-case srfi-69 (prefix base64 base64:)
     readline apropos json http-client directory-utils typed-records
     http-client srfi-18 extras format tcp-server tcp)

;; Added for csv stuff - will be removed
;;
(use sparse-vectors)

(require-library mutils)

(define *usage-log-file* #f)    ;; put path to file for logging usage in this var in the ~/.megatestrc file
(define *usage-use-seconds* #t) ;; for Epoc seconds in usage logging change this to #t in ~/.megatestrc file

;; set some parameters here
(include "transport-mode.scm")
(dbfile:db-init-proc db:initialize-main-db)

;; load the ~/.megatestrc file, put (use trace)(trace-call-sites #t)(trace function-you-want-to-trace) in this file
;;
(let ((debugcontrolf (conc (get-environment-variable "HOME") "/.megatestrc")))
  (if (common:file-exists? debugcontrolf)
      (load debugcontrolf)))

			"-override-timeout"
			"-test-files"  ;; -test-paths is for listing all
			"-load"        ;; load and exectute a scheme file
			"-section"
			"-var"
			"-dumpmode"
			"-run-id"
			"-db"
			"-ping"
			"-refdb2dat"
			"-o"
			"-log"
                        "-sync-log"
			"-since"
			"-fields"

;; this segment will run launch:setup only if -log is not set. This is fairly safe as servers are not
;; manually started and thus should never be started in a non-megatest area. Thus no need to handle situation
;; where (launch:setup) returns #f?
;;
(if (or (args:get-arg "-log")(args:get-arg "-server")) ;; redirect the log always when a server
    (handle-exceptions
	exn
      (begin
	(print "ERROR: Failed to switch to log output. " ((condition-property-accessor 'exn 'message) exn) ", exn=" exn))

      (let* ((tl   (or (args:get-arg "-log")(launch:setup)))   ;; run launch:setup if -server, ensure we do NOT run launch:setup if -log specified
	     (logf (or (args:get-arg "-log") ;; use -log unless we are a server, then craft a logfile name
		       (conc tl "/logs/server-" (current-process-id) "-" (get-host-name) ".log")))
	     (oup  (open-logfile logf)))
	(if (not (args:get-arg "-log"))
	    (hash-table-set! args:arg-hash "-log" logf)) ;; fake out future queries of -log
	(debug:print-info 0 *default-log-port* "Sending log output to " logf)

;; Start the server - can be done in conjunction with -runall or -runtests (one day...)
;;   we start the server if not running else start the client thread
;;======================================================================

;; Server? Start up here.
;;
(if (args:get-arg "-server")
    (let* ((run-id     (args:get-arg "-run-id"))
	   (dbfname    (args:get-arg "-db"))
	   (tl         (launch:setup)))

      (case (rmt:transport-mode)
	((http)(http-transport:launch))
	((tcp)
	 (debug:print 0 *default-log-port* "INFO: Running using tcp method.")
	 (if run-id
	     (tt:start-server tl run-id dbfname api:dispatch-request)
	     (begin
	       (debug:print 0 *default-log-port* "ERROR: transport mode is tcp - -run-id is required.")
	       (exit 1))))
	(else (debug:print 0 *default-log-port* "ERROR: rmt:transport-mode value not recognised "(rmt:transport-mode))))
      (set! *didsomething* #t)))

;; The adjutant is a bit different, it does NOT run (launch:setup) as it is not necessarily tied to
;; a specific Megatest area. Detail are being hashed out and this may change.
;;
(if (args:get-arg "-adjutant")
    (begin
      (adjutant-run)
      (set! *didsomething* #t)))

(if (or (args:get-arg "-list-servers")
        (args:get-arg "-kill-servers"))
    (let ((tl (launch:setup)))
      (if tl ;; all roads from here exit
	  (let* ((servers (server:choose-server *toppath* 'all-valid)) ;; (server:get-list *toppath*))
		 (fmtstr  "~33a~22a~20a~20a~8a\n"))
            (if (not servers)
              (begin
                (debug:print-info 1 *default-log-port* "No servers found")
                (exit)
              )
            )
       	    (format #t fmtstr "PID" "host:port" "age (hms)" "Last mod" "State")
	    (format #t fmtstr "===" "=========" "=========" "========" "=====")
	    (for-each ;;  (ip-addr port? mod-time host port start-time pid )
	     (lambda (server)
	       (let* ((mtm (any->number (caddr server)))
		      (mod (if mtm (- (current-seconds) mtm) "unk"))
		      (age (- (current-seconds)(or (any->number mtm) (current-seconds))))

		      (pid (list-ref server 4))
		      (url (conc (car server) ":" (cadr server)))
		      (alv (if (number? mod)(< mod 360) #f)))
		 (format #t
			 fmtstr
			 pid
			 url
			 (seconds->hr-min-sec age)
			 (seconds->hr-min-sec mod)
			 (if alv "alive" "dead"))
		 (if (and alv
			  (args:get-arg "-kill-servers"))
		     (begin
		       (debug:print-info 0 *default-log-port* "Attempting to kill server with pid " pid)
		       (server:kill server)))))
	     (sort servers (lambda (a b)
			     (let ((ma (or (any->number (car a)) 9e9))
				   (mb (or (any->number (car b)) 9e9)))
			       (> ma mb)))))

	    (set! *didsomething* #t)
	    (exit))
	  (exit))))
      ;; must do, would have to add checks to many/all calls below

;;======================================================================
;; Weird special calls that need to run *after* the server has started?

(if (args:get-arg "-cleanup-db")
    (begin
      (if (not (launch:setup))
	  (begin
	    (debug:print 0 *default-log-port* "Failed to setup, exiting") 
	    (exit 1)))

;;      (if (not (server:choose-server *toppath* 'home?))
;;	  (begin
;;	    (debug:print 0 *default-log-port* "Servers are not running on this host or no servers alive. Cannot run cleanup-db")
;;	    (exit 1)))

      (let ((dbstructs (db:setup #f)))
        (common:cleanup-db dbstructs))
      (set! *didsomething* #t)))

(if (args:get-arg "-mark-incompletes")
    (begin
      (if (not (launch:setup))

    (exit 0)))

(if (or (getenv "MT_RUNSCRIPT")
	(args:get-arg "-repl")
	(args:get-arg "-load"))
    (let* ((toppath (launch:setup))
	   (dbstructs (if (and toppath
			       ;; NOTE: server:choose-server is starting a server
			       ;;   either add equivalent for tcp mode or ????
                               #;(server:choose-server toppath 'home?))
                          (db:setup #t)
                          #f))) ;; make-dbr:dbstruct path: toppath local: (args:get-arg "-local")) #f)))
      (if *toppath*
	  (cond
	   ((getenv "MT_RUNSCRIPT")
	    ;; How to run megatest scripts
	    ;;

;;     along with mtargs.  If not, see <http://www.gnu.org/licenses/>.


(module mtargs
    (
     arg-hash
     get-arg
     get-arg-number
     get-arg-from
     get-args
     usage
     print-args
     any-defined?
     ) 

(import scheme) ;; gives us cond-expand in chicken-4

(cond-expand
 (chicken-5
  (import scheme (chicken base) (chicken port) (chicken file) (chicken process-context))
  (import srfi-69 srfi-1))
 (chicken-4
  (import chicken posix srfi-69 srfi-1))
 (else))

(define usage (make-parameter print))
(define arg-hash (make-hash-table))

(define (get-arg arg . default)
  (if (null? default)
      (hash-table-ref/default arg-hash arg #f)
      (hash-table-ref/default arg-hash arg (car default))))

;; get an arg as a number
(define (get-arg-number arg . default)
  (let* ((val-str (get-arg arg))
	 (val     (if val-str (string->number val-str) #f)))
    (if val
	val
	(if (null? default)
	    #f
	    default))))

(define (any-defined? . args)
  (not (null? (filter (lambda (x) x)
		      (map get-arg args)))))

;; (define any any-defined?)

;;======================================================================

(use format typed-records) ;; RADT => purpose of json format??

(declare (unit rmt))
(declare (uses api))
(declare (uses http-transport))
(declare (uses commonmod))
(declare (uses dbfile))
(declare (uses dbmemmod))
(declare (uses tcp-transportmod))
(include "common_records.scm")
;; (declare (uses rmtmod))

;; used by http-transport
(import dbfile) ;; rmtmod)

(import commonmod
	dbmemmod
	tcp-transportmod)

(define rmt:transport-mode (make-parameter 'http))
;;
;; THESE ARE ALL CALLED ON THE CLIENT SIDE!!!
;;

;; generate entries for ~/.megatestrc with the following
;;
;;  grep define ../rmt.scm | grep rmt: |perl -pi -e 's/\(define\s+\((\S+)\W.*$/\1/'|sort -u

  (let* ((hh-dat (remote-hh-dat runremote)))
    (if (pair? hh-dat)
	(cdr hh-dat)
	(begin
	  (debug:print-info 0 *default-log-port* "hh-dat="hh-dat)
	  #f))))

(define (make-and-init-remote areapath)
   (case (rmt:transport-mode)
     ((http)(make-remote))
     ((tcp) (tt:make-remote areapath))
     (else #f)))

;;======================================================================

(define *send-receive-mutex* (make-mutex)) ;; should have separate mutex per run-id

;; RA => e.g. usage (rmt:send-receive 'get-var #f (list varname))
;;
(define (rmt:send-receive cmd rid params #!key (attemptnum 1)(area-dat #f)) ;; start attemptnum at 1 so the modulo below works as expected

  #;(common:telemetry-log (conc "rmt:"(->string cmd))
                        payload: `((rid . ,rid)
                                   (params . ,params)))
  
  (if (> attemptnum 2)
      (debug:print 0 *default-log-port* "INFO: attemptnum in rmt:send-receive is " attemptnum))
  
  (cond
   ((> attemptnum 2) (thread-sleep! 0.05))
   ((> attemptnum 10) (thread-sleep! 0.5))
   ((> attemptnum 20) (thread-sleep! 1)))

  ;; I'm turning this off, it may make sense to move it
  ;; into http-transport-handler
  (if (and (> attemptnum 5) (= 0 (modulo attemptnum 15)))  
      (begin
	(server:run *toppath*)
	(thread-sleep! 3)))









  ;; 1. check if server is started IFF cmd is a write OR if we are not on the homehost, store in runremote
  ;; 2. check the age of the connections. refresh the connection if it is older than timeout-20 seconds.
  ;; 3. do the query, if on homehost use local access
  ;;
  (let* ((start-time    (current-seconds)) ;; snapshot time so all use cases get same value
         (areapath      *toppath*);; TODO - resolve from dbstruct to be compatible with multiple areas
	 (runremote     (or area-dat
			    *runremote*))
         (attemptnum    (+ 1 attemptnum))
	 (readonly-mode (rmtmod:calc-ro-mode runremote *toppath*))
	 (testsuite     (common:get-testsuite-name))
	 (mtexe         (common:find-local-megatest)))

    (case (rmt:transport-mode)
      ((http)(http-transport-handler runremote cmd rid params attemptnum area-dat areapath readonly-mode))
      ((tcp) (tcp-transport-handler  runremote cmd rid params attemptnum area-dat areapath readonly-mode testsuite mtexe)))))

(define (tcp-transport-handler runremote cmd rid params attemptnum area-dat areapath readonly-mode testsuite mtexe)
  (if (not runremote)
      (let* ((newremote  (make-and-init-remote areapath)))
	(set! *runremote* newremote)
	(set! runremote newremote)))
  (let* ((dbfname (conc (dbfile:run-id->dbnum rid)".db"))) ;;(dbfile:run-id->path areapath run-id)))
    (tt:handler runremote cmd rid params attemptnum area-dat areapath readonly-mode dbfname testsuite mtexe)))
	
(define (http-transport-handler runremote cmd rid params attemptnum area-dat areapath readonly-mode)
  ;; do all the prep locked under the rmt-mutex
  (mutex-lock! *rmt-mutex*)
  
  ;; ensure we have a record for our connection for given area
  (if (not runremote)                   ;; can remove this one. should never get here.         
      (begin
	(set! *runremote* (make-and-init-remote areapath))
        (let* ((server-info (remote-server-info *runremote*))) 
          (if server-info
	      (begin
		(remote-server-url-set! *runremote* (server:record->url server-info))
		(remote-server-id-set! *runremote* (server:record->id server-info)))))  
	(set! runremote   *runremote*))) ;; new runremote will come from this on next iteration







  ;; ensure we have a homehost record
  (if (or (not (pair? (remote-hh-dat runremote)))  ;; not on homehost
	  (not (cdr (remote-hh-dat runremote))))   ;; not on homehost
      (thread-sleep! 0.1) ;; since we shouldn't get here, delay a little
      (let ((hh-data (server:choose-server areapath 'homehost)))
	(remote-hh-dat-set! runremote (or hh-data (cons #f #f)))))
  

  (cond









   ;; give up if more than 150 attempts
   ((> attemptnum 150)
    (debug:print 0 *default-log-port* "ERROR: 150 tries to start/connect to server. Giving up.")
    (exit 1))




   ;; readonly mode, read request-  handle it - case 2
   ((and readonly-mode
         (member cmd api:read-only-queries)) 
    (mutex-unlock! *rmt-mutex*)
    (debug:print-info 12 *default-log-port* "rmt:send-receive, case 2")
    (rmt:open-qry-close-locally cmd 0 params)
    )




   ;; readonly mode, write request.  Do nothing, return #f
   (readonly-mode (extras-readonly-mode *rmt-mutex* *default-log-port* cmd params))

   ;; This block was for pre-emptively resetting the connection if there had been no communication for some time.
   ;; I don't think it adds any value. If the server is not there, just fail and start a new connection.
   ;; also, the expire-time calculation might not be correct. We want, time-since-last-server-access > (server:get-timeout)
   ;;



   ;; reset the connection if it has been unused too long
   ((and runremote
         (remote-api-url runremote)
	 (> (current-seconds) ;; if it has been more than server-timeout seconds since last contact, close this connection and start a new on
	    (+ (remote-last-access runremote)
	       (remote-server-timeout runremote))))
    (debug:print-info 0 *default-log-port* "Connection to " (remote-server-url runremote) " expired due to no accesses in " (remote-server-timeout runremote) " seconds, forcing new connection.")
    (http-transport:close-connections runremote)
    ;; moving this setting of runremote conndat to #f to inside the http-transport:close-connections
    ;; (remote-conndat-set! runremote #f) ;; invalidate the connection, thus forcing a new connection.
    (mutex-unlock! *rmt-mutex*)
    (rmt:send-receive cmd rid params attemptnum: attemptnum))
   




   ;; on homehost and this is a read
   ((and (not (remote-force-server runremote)) ;; honor forced use of server, i.e. server NOT required
	 (rmt:on-homehost? runremote)
         (member cmd api:read-only-queries))   ;; this is a read
    (mutex-unlock! *rmt-mutex*)
    (debug:print-info 12 *default-log-port* "rmt:send-receive, case  5")
    (rmt:open-qry-close-locally cmd 0 params))




























   ;; on homehost and this is a write, we already have a server
   ((and (not (remote-force-server runremote))     ;; honor forced use of server, i.e. server NOT required
	 (cdr (remote-hh-dat runremote))           ;; on homehost
         (not (member cmd api:read-only-queries))  ;; this is a write
         (remote-server-url runremote))            ;; have a server (needed to sync written data back)
    (mutex-unlock! *rmt-mutex*)
    (debug:print-info 12 *default-log-port* "rmt:send-receive, case  4.1")
    (rmt:open-qry-close-locally cmd 0 params))




   ;;  on homehost, no server contact made and this is a write, passively start a server 
   ((and (not (remote-force-server runremote))     ;; honor forced use of server, i.e. server NOT required
	 (cdr (remote-hh-dat runremote))           ;; have homehost
         (not (remote-server-url runremote))       ;; no connection yet
	 (not (member cmd api:read-only-queries))) ;; not a read-only query
    (debug:print-info 12 *default-log-port* "rmt:send-receive, case  8")
    (let ((server-info  (server:check-if-running *toppath*))) ;; (server:read-dotserver->url *toppath*))) ;; (server:check-if-running *toppath*))) ;; Do NOT want to run server:check-if-running - very expensive to do for every write call

   ;;DOT CASE11 [label="send_receive"];
   ;;DOT MUTEXLOCK -> CASE11 [label="else"]; {rank=same "case 11" CASE11};
   ;;DOT CASE11 -> "rmt:send-receive" [label="call failed"];
   ;;DOT CASE11 -> "RESULT" [label="call succeeded"];
   ;; not on homehost, do server query
   (else (extras-case-11 *default-log-port* runremote cmd params attemptnum rid))))


;; bunch of small functions factored out of send-receive to make debug easier
;;

(define (extras-case-11 *default-log-port* runremote cmd params attemptnum rid)
  ;; (mutex-unlock! *rmt-mutex*)
  (debug:print-info 12 *default-log-port* "rmt:send-receive, case  9")

(use (prefix sqlite3 sqlite3:) srfi-1 posix regex regex-case srfi-69 (srfi 18) 
     posix-extras directory-utils pathname-expand typed-records format  sxml-serializer
     sxml-modifications matchable)

(declare (unit runs))
(declare (uses db))
(declare (uses common))
(declare (uses commonmod))
(declare (uses items))
(declare (uses runconfig))
(declare (uses tests))
(declare (uses server))
(declare (uses mt))
(declare (uses archive))
;; (declare (uses filedb))

(include "common_records.scm")
(include "key_records.scm")
(include "db_records.scm")
(include "run_records.scm")
(include "test_records.scm")

;; (include "debugger.scm")

(import commonmod)

;; use this struct to facilitate refactoring
;;

(defstruct runs:dat
  reglen regfull
  runname max-concurrent-jobs run-id

(define (server:get-server-id)
  (if *server-id* *server-id*
      (let ((sig (server:mk-signature))) ;; clients re-use the server:mk-signature logic
        (set! *server-id* sig)
        *server-id*)))

;; ;; When using zmq this would send the message back (two step process)
;; ;; with spiffy or rpc this simply returns the return data to be returned
;; ;; 
;; (define (server:reply return-addr query-sig success/fail result)
;;   (debug:print-info 11 *default-log-port* "server:reply return-addr=" return-addr ", result=" result)
;;   ;; (send-message pubsock target send-more: #t)
;;   ;; (send-message pubsock 
;;   (case (server:get-transport)
;;     ((rpc)  (db:obj->string (vector success/fail query-sig result)))
;;     ((http) (db:obj->string (vector success/fail query-sig result)))
;;     ((fs)   result)
;;     (else 
;;      (debug:print-error 0 *default-log-port* "unrecognised transport type: " *transport-type*)
;;      result)))

;; Given an area path,  start a server process    ### NOTE ### > file 2>&1 
;; if the target-host is set 
;; try running on that host
;;   incidental: rotate logs in logs/ dir.
;;
(define  (server:run areapath) ;; areapath is *toppath* for a given testsuite area

(define (server:kill servr)
  (handle-exceptions
    exn
    (begin 
      (debug:print-info 0 *default-log-port*  "Unable to get host and/or port from " servr ", exn=" exn)     
    #f)
  (match-let (((hostname port start-time server-id pid)
	       servr))
    (tasks:kill-server hostname pid))))

;; called in megatest.scm, host-port is string hostname:port
;;
;; NOTE: This is NOT called directly from clients as not all transports support a client running
;;       in the same process as the server.
;;
(define (server:ping host:port server-id #!key (do-exit #f))
  (let* ((host-port (cond
		     ((string? host:port)
		      (let ((slst (string-split   host:port ":")))
			(if (eq? (length slst) 2)
			    (list (car slst)(string->number (cadr slst)))
			    #f)))
		     (else
		      #f))))
    (cond
     ((and (list? host-port)
	   (eq? (length host-port) 2))
      (let* ((myrunremote (make-and-init-remote *toppath*))
	     (iface       (car host-port))
	     (port        (cadr host-port))
	     (server-dat  (client:connect iface port server-id myrunremote))
	     (login-res   (rmt:login-no-auto-client-setup myrunremote)))
	(http-transport:close-connections myrunremote)
	(if (and (list? login-res)
		 (car login-res))

;;======================================================================
;; Copyright 2017, Matthew Welland.
;; 
;; This file is part of Megatest.
;; 
;;     Megatest is free software: you can redistribute it and/or modify
;;     it under the terms of the GNU General Public License as published by
;;     the Free Software Foundation, either version 3 of the License, or
;;     (at your option) any later version.
;; 
;;     Megatest is distributed in the hope that it will be useful,
;;     but WITHOUT ANY WARRANTY; without even the implied warranty of
;;     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;     GNU General Public License for more details.
;; 
;;     You should have received a copy of the GNU General Public License
;;     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.

;;======================================================================

(declare (unit tcp-transportmod))
(declare (uses debugprint))
(declare (uses commonmod))
(declare (uses dbfile))
(declare (uses dbmod))

(use address-info)

(module tcp-transportmod
	*
	
  (import scheme
	  (prefix sqlite3 sqlite3:)
	  chicken
	  data-structures

	  address-info
	  directory-utils
	  extras
	  files
	  hostinfo
	  matchable
	  md5
	  message-digest
	  ports
	  posix
	  regex
	  regex-case
	  s11n
	  srfi-1
	  srfi-18
	  srfi-4
	  srfi-69
	  stack
	  typed-records
	  tcp-server
	  tcp
	  
	  debugprint
	  commonmod
	  dbfile
	  dbmod
	)

;;======================================================================
;; client
;;======================================================================

;; (define keep-age-param (make-parameter 10)) ;; qif file age, if over move to attic

(defstruct tt-conn
  host
  port
  host-port
  dbfname
  server-id
  server-start
  pid
)

(defstruct tt
  ;; client related
  (conns (make-hash-table)) ;; dbfname -> conn

  ;; server related
  (areapath     #f)
  (host         #f)
  (port         #f)
  (conn         #f)
  (cleanup-proc #f)
  (handler      #f) ;; receives data and responds
  (socket       #f)
  (thread       #f)
  (host-port    #f)
  (cmd-thread   #f)
  )

(define (tt:make-remote areapath)
  (make-tt area: areapath))

;; do all the busy work of finding and setting up conn for
;; connecting to a server
;; 
(define (tt:client-connect-to-server ttdat dbfname run-id)
  (let* ((conn (hash-table-ref/default (tt-conns ttdat) dbfname #f)))
    (if conn
	conn ;; we are already connected to the server
	(let* ((sdat (tt:get-current-server-info ttdat dbfname run-id)))
	  (match sdat
	    ((host port start-time server-id pid)
	     (let ((conn (make-tt-conn
			  host: host
			  port: port
			  dbfname: dbfname
			  server-id: server-id
			  server-start: start-time
			  pid: pid)))
	       (hash-table-set! (tt-conns ttdat) dbfname conn)
	       conn))
	    (else
	     (tt:server-process-run
	      (tt-areapath ttdat)
	      (dbfile:testsuite-name)
	      (common:find-local-megatest)
	      run-id)
	     (thread-sleep! 1)
	     (tt:client-connect-to-server ttdat dbfname run-id)))))))

;; client side handler
;;
(define (tt:handler ttdat cmd run-id params attemptnum area-dat areapath readonly-mode dbfname testsuite mtexe)
  ;; NOTE: areapath is passed in and in tt struct. We'll use passed in value for now.
  (let* ((conn (tt:client-connect-to-server ttdat dbfname run-id))) ;; (hash-table-ref/default (tt-conns ttdat) dbfname #f)))
    (if conn
	;; have connection, call the server
	(let* ((res (tt:send-receive ttdat conn cmd run-id params)))
	  (cond
	   ((member res '(busy starting))
	    (thread-sleep! 1)
	    (tt:handler  ttdat cmd run-id params attemptnum area-dat areapath readonly-mode dbfname testsuite mtexe))
	   (else
	    res)))
	(begin
	  (thread-sleep! 1) ;; give it a rest and try again
	  (tt:handler ttdat cmd run-id params attemptnum area-dat areapath readonly-mode dbfname testsuite mtexe)))))

	;; no conn yet, find and or start and find a server
;; 	(let* ((server (tt:find-server ttdat dbfname)))
;; 	  (if server
;; 	      (let* ((conn (tt:client-connect-to-server server)))
;; 		(hash-table-set! (tt-conns ttdat) dbfname conn)
;; 		(tt:handler  ttdat cmd run-id params attemptnum area-dat areapath readonly-mode
;; 			     dbfname testsuite mtexe))
;; 	      ;; no server, try to start a server process
;; 	      (begin
;; 		(tt:server-process-run areapath testsuite mtexe run-id) ;;  #!key (profile-mode "")) 
;; 		(thread-sleep! 1)
;; 		(tt:handler  ttdat cmd run-id params attemptnum area-dat areapath
;; 			     readonly-mode dbfname testsuite mtexe)))))))

(define (tt:bid-for-servership run-id)
  #f)

(define (tt:get-current-server-info ttdat dbfname run-id)
  (let* ((sfiles (tt:find-server ttdat dbfname)))
    (case (length sfiles)
      ((0) #f) ;; no server around
      ((1) (tt:server-get-info (car sfiles)))
      (else #f) ;; we'll want to wait until extra servers have exited
      )))

(define (tt:send-receive ttdat conn cmd run-id params)
  (let* ((host-port (conc (tt-conn-host conn)":"(tt-conn-port conn)))
	 (dat       (list cmd run-id params)))
    (let-values (((inp oup)(tcp-connect host-port)))
      (let ((res (if (and inp oup)
		     (begin
		       (serialize dat oup)
		       (close-output-port oup)
		       (deserialize inp))
		     (begin
		       (debug:print 0 *default-log-port* "ERROR: send called but no receiver has been setup. Please call setup first!")
		       #f))))
	(close-input-port inp)
	;; (mutex-unlock! *send-mutex*) ;; DOESN'T SEEM TO HELP
	res))))

;;======================================================================
;; server
;;======================================================================

(define (tt:sync-dbs ttdat)
  #f)

;; start the listener and start responding to requests
;;
;; NOTE: organise by dbfname, not run-id so we don't need
;;       to pull in more modules
;;
(define (tt:start-server areapath run-id dbfname handler)
  ;; is there already a server for this dbfile? Then exit.
  (let* ((ttdat  (make-tt areapath: areapath))
	 (servers (tt:find-server ttdat dbfname)))
    (tt-handler-set! ttdat handler)
    (if (null? servers)
	(let* ((dbstruct (dbmod:open-dbmoddb areapath run-id (dbfile:db-init-proc))))
	  (tt:start-tcp-server ttdat) ;; start the tcp-server which applies handler to incoming data
	  (tt:keep-running ttdat dbfname handler))
	(begin
	  (debug:print 0 *default-log-port* "INFO: found server(s) already running for db "dbfname", "(string-intersperse servers ",")" Exiting.")
	  (exit)))))

(define (tt:keep-running ttdat dbfile)
  ;; verfiy conn for ready
  ;; listener socket has been started by this stage
  (debug:print 0 *default-log-port* "INFO: Got here!!!!"))

;; ;; given an already set up uconn start the cmd-loop
;; ;;
;; (define (tt:cmd-loop ttdat)
;;   (let* ((serv-listener (-socket uconn))
;; 	 (listener      (lambda ()
;; 			  (let loop ((state 'start))
;; 			    (let-values (((inp oup)(tcp-accept serv-listener)))
;; 			      ;; (mutex-lock! *send-mutex*) ;; DOESN'T SEEM TO HELP
;; 			      (let* ((rdat  (deserialize inp)) ;; '(my-host-port qrykey cmd params)
;; 				     (resp  (ulex-handler uconn rdat)))
;; 				(serialize resp oup)
;; 				(close-input-port inp)
;; 				(close-output-port oup)
;; 				;; (mutex-unlock! *send-mutex*) ;; DOESN'T SEEM TO HELP
;; 				)
;; 			      (loop state))))))
;;     ;; start N of them
;;     (let loop ((thnum   0)
;; 	       (threads '()))
;;       (if (< thnum 100)
;; 	  (let* ((th (make-thread listener (conc "listener" thnum))))
;; 	    (thread-start! th)
;; 	    (loop (+ thnum 1)
;; 		  (cons th threads)))
;; 	  (map thread-join! threads)))))
;; 
;; 
;; 
;; (define (wait-and-close uconn)
;;   (thread-join! (udat-cmd-thread uconn))
;;   (tcp-close (udat-socket uconn)))
;; 
;; 

(define (tt:shutdown-server ttdat)
  (let* ((cleanproc (tt-cleanup-proc ttdat)))
    (if cleanproc (cleanproc))
    (tcp-close (tt-socket ttdat)) ;; close up ports here
    ))

;; (define (wait-and-close uconn)
;;   (thread-join! (tt-cmd-thread uconn))
;;   (tcp-close (tt-socket uconn)))

;; return servid
;; side-effects:
;;   ttdat-cleanup-proc is populated with function to remove the serverinfo file
(define (tt:create-server-registration-file ttdat dbfname)
  (let* ((areapath (tt-areapath ttdat))
	 (servdir  (tt:get-servinfo-dir areapath))
	 (conn     (hash-table-ref/default (tt-conns ttdat) dbfname #f)))
    (assert conn "FATAL: tt:create-server-registration-file called with no conn, dbfname="dbfname)
    (let* ((host    (tt-conn-host conn))
	   (port    (tt-conn-port conn))
	   (servinf (conc servdir"/"host":"port"-"(current-process-id)":"dbfname))
	   (serv-id (tt:mk-signature areapath))
	   (clean-proc (lambda ()
			 (delete-file* servinf))))
      (tt-cleanup-proc-set! ttdat clean-proc)
      (with-output-to-file servinf
	(lambda ()
	  (print "SERVER STARTED: "host":"port" AT "(current-seconds)" server-id: "serv-id" pid: "(current-process-id)" dbfname: "dbfname)))
      serv-id)))

;; find valid server
;; get servers listed, last part of name must match :<dbfname>
;; if more than one, wait one second and look again
;; future: ping oldest, if alive remove other :<dbfname> files
;;
(define (tt:find-server ttdat dbfname)
  (let* ((areapath (tt-areapath ttdat))
	 (servdir  (tt:get-servinfo-dir areapath))
	 (sfiles   (glob (conc servdir"/*:"dbfname))))
    sfiles))

;; given a path to a server info file return: host port startseconds server-id
;; example of what it's looking for in the log file:
;;     SERVER STARTED: 10.38.175.67:50216 AT 1616502350.0 server-id: 4907e90fc55c7a09694e3f658c639cf4 
;;
(define (tt:server-get-info logf)
  (let ((server-rx    (regexp "^SERVER STARTED: (\\S+):(\\d+) AT ([\\d\\.]+) server-id: (\\S+) pid: (\\d+)")) ;; SERVER STARTED: host:port AT timesecs server id
        (dbprep-rx    (regexp "^SERVER: dbprep"))
        (dbprep-found 0)
	(bad-dat      (list #f #f #f #f #f)))
    (handle-exceptions
     exn
     (begin
       ;; WARNING: this is potentially dangerous to blanket ignore the errors
       (if (file-exists? logf)
	   (debug:print-info 2 *default-log-port* "Unable to get server info from "logf", exn=" exn))
       bad-dat) ;; no idea what went wrong, call it a bad server
     (with-input-from-file
	 logf
       (lambda ()
	 (let loop ((inl  (read-line))
		    (lnum 0))
	   (if (not (eof-object? inl))
	       (let ((mlst (string-match server-rx inl))
		     (dbprep (string-match dbprep-rx inl)))
		 (if dbprep (set! dbprep-found 1))
		 (if (not mlst)
		     (if (< lnum 500) ;; give up if more than 500 lines of server log read
			 (loop (read-line)(+ lnum 1))
			 (begin 
                           (debug:print-info 0 *default-log-port* "Unable to get server info from first 500 lines of " logf )
                           bad-dat))
		     (match mlst
			    ((_ host port start server-id pid)
			     (list host
				   (string->number port)
				   (string->number start)
				   server-id
				   (string->number pid)))
			    (else
			     (debug:print 0 *default-log-port* "ERROR: did not recognise SERVER line info "mlst)
			     bad-dat))))
	       (begin 
		 (if dbprep-found
		     (begin
		       (debug:print-info 2 *default-log-port* "Server is in dbprep at " (common:human-time))
		       (thread-sleep! 0.5)) ;; was 25 sec but that blocked things from starting?
		     (debug:print-info 0 *default-log-port* "Unable to get server info from " logf " at " (seconds->time-string (current-seconds))))
		 bad-dat))))))))

;; Given an area path,  start a server process    ### NOTE ### > file 2>&1 
;; if the target-host is set 
;; try running on that host
;;   incidental: rotate logs in logs/ dir.
;;
(define  (tt:server-process-run areapath testsuite mtexe run-id #!key (profile-mode "")) ;; areapath is *toppath* for a given testsuite area
  (let* ((logfile   (conc areapath "/logs/server.log")) ;; -" curr-pid "-" target-host ".log"))
	 (cmdln     (conc
		     mtexe
		     " -server - ";; (or target-host "-")
		     " -m testsuite:" testsuite
		     " -run-id " (or run-id "main")
		     " -db "  (dbmod:run-id->dbfname run-id)
		     " " profile-mode
		     ))) ;; (conc " >> " logfile " 2>&1 &")))))
    ;; we want the remote server to start in *toppath* so push there
    (push-directory areapath)
    (debug:print 0 *default-log-port* "INFO: Trying to start server in tcp mode (" cmdln ") ...")
    (debug:print 0 *default-log-port* "INFO: starting server at " (common:human-time))
    (system (conc "nbfake " cmdln))
    (pop-directory)))

;;======================================================================
;; tcp connection stuff
;;======================================================================

;; create a tcp listener and return a populated udat struct with
;; my port, address, hostname, pid etc.
;; return #f if fail to find a port to allocate.
;;
;;  if udata-in is #f create the record
;;  if there is already a serv-listener return the udata
;;
(define (setup-listener uconn #!optional (port 4242))
  (assert (tt? uconn) "FATAL: setup-listener called with wrong struct "uconn)
  (handle-exceptions
   exn
   (if (< port 65535)
       (setup-listener uconn (+ port 1))
       #f)
   (connect-listener uconn port)))

;; find a port and start tcp-server
;;
(define (tt:start-tcp-server ttdat)
  (setup-listener ttdat)
  (let* ((socket   (tt-socket ttdat))
	 (handler  (tt-handler    ttdat)))
    ((make-tcp-server socket handler)
     #t ;; yes, send error messages to std-err
     )))

(define (connect-listener uconn port)
  ;; (tcp-listener-socket LISTENER)(socket-name so)
  ;; sockaddr-address, sockaddr-port, sockaddr->string
  (let* ((tlsn (tcp-listen port 1000 #f)) ;; (tcp-listen TCPPORT [BACKLOG [HOST]])
	 (addr  (tt:get-best-guess-address (get-host-name)))) ;; (get-my-best-address))) ;; (hostinfo-addresses (host-information (current-hostname)))
    (tt-port-set!      uconn port)
    (tt-host-port-set! uconn (conc addr":"port))
    (tt-socket-set!    uconn tlsn)
    uconn))



;;======================================================================
;; utils
;;======================================================================

;; Generate a unique signature for this server
(define (tt:mk-signature areapath)
  (message-digest-string (md5-primitive) 
			 (with-output-to-string
			   (lambda ()
			     (write (list areapath
                                          (current-process-id)
					  (argv)))))))


(define (tt:get-best-guess-address hostname)
  (let ((res #f))
    (for-each 
     (lambda (adr)
       (if (not (eq? (u8vector-ref adr 0) 127))
	   (set! res adr)))
     ;; NOTE: This can fail when there is no mention of the host in /etc/hosts. FIXME
     (vector->list (hostinfo-addresses (hostname->hostinfo hostname))))
    (string-intersperse 
     (map number->string
	  (u8vector->list
	   (if res res (hostname->ip hostname)))) ".")))

(define (tt:get-servinfo-dir areapath)
  (let* ((spath (conc areapath"/.servinfo")))
    (if (not (file-exists? spath))
	(create-directory spath #t))
    spath))

;;======================================================================
;; network utilities
;;======================================================================

;; NOTE: Look at address-info egg as alternative to some of this

(define (rate-ip ipaddr)
  (regex-case ipaddr
    ( "^127\\..*" _ 0 )
    ( "^(10\\.0|192\\.168)\\..*" _ 1 )
    ( else 2 ) ))

;; Change this to bias for addresses with a reasonable broadcast value?
;;
(define (ip-pref-less? a b)
  (> (rate-ip a) (rate-ip b)))

(define (get-my-best-address)
  (let ((all-my-addresses (get-all-ips)))
    (cond
     ((null? all-my-addresses)
      (get-host-name))                                          ;; no interfaces?
     ((eq? (length all-my-addresses) 1)
      (car all-my-addresses))                      ;; only one to choose from, just go with it
     (else
      (car (sort all-my-addresses ip-pref-less?))))))

(define (get-all-ips-sorted)
  (sort (get-all-ips) ip-pref-less?))

(define (get-all-ips)
  (map address-info-host
       (filter (lambda (x)
		 (equal? (address-info-type x) "tcp"))
	       (address-infos (get-host-name)))))

)

;; 'http or 'tcp
;; (rmt:transport-mode 'tcp)
(rmt:transport-mode 'http)