;;; Build Farm Front-End
;;;
;;; Copyright © 2023 Christopher Baines <mail@cbaines.net>
;;;
;;; This program is free software: you can redistribute it and/or
;;; modify it under the terms of the GNU Affero General Public License
;;; as published by the Free Software Foundation, either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; This program 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
;;; Affero General Public License for more details.
;;;
;;; You should have received a copy of the GNU Affero General Public
;;; License along with this program.  If not, see
;;; <http://www.gnu.org/licenses/>.

(define-module (bffe)
  #:use-module (ice-9 format)
  #:use-module (oop goops)
  #:use-module (prometheus)
  #:use-module (logging logger)
  #:use-module (logging port-log)
  #:use-module (fibers)
  #:use-module (fibers scheduler)
  #:use-module (fibers channels)
  #:use-module (fibers conditions)
  #:use-module ((guix-build-coordinator utils fibers)
                #:select (call-with-sigint))
  #:use-module (bffe server)
  #:use-module (bffe manage-builds)
  #:export (run-bffe-service))

(define* (run-bffe-service
          #:key
          (metrics-registry
           (make-metrics-registry
            #:namespace
            "bffe"))
          (build '())
          pid-file
          (web-server-args '()))
  (let ((lgr      (make <logger>))
        (port-log (make <port-log>
                    #:port (current-output-port)
                    #:formatter
                    (lambda (lvl time str)
                      (format #f "~a (~5a): ~a~%"
                              (strftime "%F %H:%M:%S" (localtime time))
                              lvl
                              str)))))

    (setvbuf (current-output-port) 'line)

    (add-handler! lgr port-log)
    (open-log! lgr)
    (set-default-logger! lgr)

    (let ((finished? (make-condition)))
      (call-with-sigint
       (lambda ()
         (run-fibers
          (lambda ()
            (for-each start-submit-builds-fibers
                      build)

            (when web-server-args
              (apply start-bffe-web-server
                     `(,@web-server-args
                       #:pid-file ,pid-file
                       #:metrics-registry ,metrics-registry)))
            (wait finished?))
          #:hz 0
          #:parallelism 1))
       finished?))))