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#!@GUILE@ --no-auto-compile
-*- scheme -*-
-*- geiser-scheme-implementation: guile -*-
!#
;;; mumi -- Mediocre, uh, mail interface
;;; Copyright © 2016, 2017, 2019 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2018 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of mumi.
;;;
;;; mumi 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.
;;;
;;; mumi 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 mumi.  If not, see <http://www.gnu.org/licenses/>.

(use-modules (srfi srfi-1)
             (srfi srfi-26)
             (srfi srfi-37)
             (system repl server)
             (ice-9 match)
             (ice-9 threads)
             (mumi config)
             (mumi bugs)
             (mumi messages)
             (mumi web server)
             (debbugs))

(db-create!)

(define %default-repl-server-port
  ;; Default port to run REPL server on, if --listen-repl is provided
  ;; but no port is mentioned
  37146)

;; Keep indexing the mail directory
(define %update-interval 60)
(define mu-index
  (let ((mu (%config 'mu-executable)))
    (lambda _
      (let* ((maildir (%config 'mail-dir))
             (args (list "index"
                         "--quiet"
                         (format #f "--muhome=~a" maildir)
                         (format #f "--maildir=~a" maildir))))
        (unless (zero? (apply system* mu args))
          (format (current-error-port)
                  "Failed to run `~a'~%" command))))))

(define update-state!
  (lambda _
    (mu-index)
    (update-bug-database!)
    (sleep %update-interval)
    (update-state!)))

(define %options
  ;; Specifications of the command-line options
  (list (option '("listen-repl") #f #t
                (lambda (opt name arg result)
                  (let ((port (cond (arg => string->number)
                                    (else %default-repl-server-port))))
                    (if port
                        (alist-cons 'listen-repl port
                                    (alist-delete 'listen-repl result))
                        (error "invalid REPL server port" arg)))))
        (option '("fetch") #f #f
                (lambda (opt name arg result)
                  (alist-cons 'fetch #t result)))
        (option '("worker") #f #f
                (lambda (opt name arg result)
                  (alist-cons 'worker #t result)))))

(define %default-options
  ;; Alist of default option values
  `((listen-repl . #f)
    (fetch . #f)
    (worker . #f)))

(define (parse-options args)
  (args-fold
   args %options
   (lambda (opt name arg result)
     (error "unrecognized option" name))
   (lambda (arg result)
     (error "extraneous argument" arg))
   %default-options))

(let ((opts (parse-options (cdr (program-arguments)))))
  (cond
   ((assoc-ref opts 'worker)
    (update-state!))
   ((assoc-ref opts 'fetch)
    (let ((bug-nums
           (sort (append-map (lambda (package)
                               (soap-invoke (%config 'debbugs)
                                            get-bugs
                                            `((package . ,package))))
                             (%config 'packages)) <)))
      (for-each (lambda (bug-num i)
                  (let ((msg-nums
                         (match (soap-invoke (%config 'debbugs)
                                             get-bug-message-numbers
                                             bug-num)
                           ((nums . ids) nums))))
                    (format (current-error-port)
                            "[~a/~a] Downloading ~a messages of bug ~a...~%"
                            i (length bug-nums)
                            (length msg-nums) bug-num)
                    (parameterize ((current-error-port (%make-void-port OPEN_WRITE)))
                      (par-for-each (cut download-message bug-num <>)
                                    msg-nums))))
                bug-nums
                (iota (length bug-nums) 1))))
   (else
    (let ((repl-port (assoc-ref opts 'listen-repl)))
      (when repl-port
        (spawn-server (make-tcp-server-socket #:port repl-port))))
    (use-modules (mumimu))
    (mu:initialize (%config 'mail-dir))
    (start-mumi-web-server 1234))))