#! /usr/bin/env guile
# -*-scheme-*-
!#

;;; 8sync --- Asynchronous programming for Guile
;;; Copyright © 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of 8sync.
;;;
;;; 8sync is free software: you can redistribute it and/or modify it
;;; under the terms of the GNU Lesser General Public License as
;;; published by the Free Software Foundation, either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; 8sync 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 Lesser General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with 8sync.  If not, see <http://www.gnu.org/licenses/>.

(define-module (8s-server)
  #:use-module (oop goops)
  #:use-module (8sync)
  #:use-module (8sync systems web)
  #:use-module (8sync systems websocket client)
  #:use-module (8sync systems websocket server)
  #:export (main))

(define %server-port 1236)

(define-actor <sleeper> (<actor>)
  ((*init* sleeper-loop))
  (sleep-secs #:init-value 3 #:getter sleeper-sleep-secs))

(define (sleeper-loop actor message)
  (while (actor-alive? actor)
    (display "Zzzzzzzz....\n")
    ;; Sleep for a bit
    (8sleep (sleeper-sleep-secs actor))))

(define (main . args)
  (let* ((hive (make-hive))
         (sleeper (bootstrap-actor hive <sleeper>))
         (suspendable-port-bug? #t) ;; server must send large message to browser
         (server (bootstrap-actor
                  hive <websocket-server>
                  #:port %server-port
                  #:on-ws-client-connect (lambda args
                                           (format (current-error-port) "on-ws-client-connection: ~s\n" args))
                  #:on-ws-client-disconnect (lambda args
                                              (format (current-error-port) "on-ws-client-disconnect: ~s\n" args))
                  #:on-ws-message (lambda (ws id msg)
                                    (format (current-error-port) "on-message: ~s: ~s\n" 'ws
                                            (if (< (string-length msg) 80) msg
                                                (string-append (substring msg 0 77) "...")))
                                    (<- (actor-id ws) 'ws-send id msg)
                                    (when suspendable-port-bug?
                                      (<- (actor-id ws) 'ws-send id (string-append "Say: " (make-string (expt 2 16) #\A) "\n"))))
                  #:on-ws-open (lambda (ws)
                                 (format (current-error-port) "on-open: ~s\n" ws)))))
    (format (current-error-port) "listening: ~s\n" %server-port)
    (run-hive hive '())))

;; HACK: Do not suspend writes to avoid
;; `The connection to ws://localhost:1236/ was interrupted while the page was loading.' (icecat)
;; `could not decode a text frame as utf-8' (ungoogled chromium)

;; (define put-bytevector (@ (ice-9 binary-ports) put-bytevector))
;; (module-define! (resolve-module '(8sync systems websocket frame)) 'put-bytevector put-bytevector)

(main (command-line))