#!/usr/bin/env python3
# -*- coding:utf-8 -*
#
# Copyright 2019
# - Sli <antoine@bartuccio.fr>
#
# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
# http://ae.utbm.fr.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License a 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 General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
#

import os
import signal
import sys
from http.server import CGIHTTPRequestHandler, test

from django.core.management.base import BaseCommand
from django.utils import autoreload


class Command(BaseCommand):
    help = "Generate Sphinx documentation and launch basic server"

    default_addr = "127.0.0.1"
    default_port = "8080"

    def add_arguments(self, parser):
        parser.add_argument(
            "addrport", nargs="?", help="Optional port number, or ipaddr:port"
        )

    def build_documentation(self):
        os.chdir(os.path.join(self.project_dir, "doc"))
        err = os.system("make html")

        if err != 0:
            self.stdout.write("A build error occured")

    def start_server(self, **kwargs):
        os.chdir(os.path.join(self.project_dir, "doc", "_build/html"))
        addr = self.default_addr
        port = self.default_port
        if kwargs["addrport"]:
            addrport = kwargs["addrport"].split(":")

            addr = addrport[0]

            if len(addrport) > 1:
                port = addrport[1]

            if not port.isnumeric():
                self.stdout.write("%s is not a valid port" % (port,))
                sys.exit(0)

        test(HandlerClass=CGIHTTPRequestHandler, port=int(port), bind=addr)

    def build_and_start_server(self, **kwargs):
        self.build_documentation()
        self.start_server(**kwargs)

    def handle(self, *args, **kwargs):
        self.project_dir = os.getcwd()

        signal.signal(signal.SIGTERM, lambda *args: sys.exit(0))
        try:
            if os.environ.get(autoreload.DJANGO_AUTORELOAD_ENV) == "true":
                reloader = autoreload.get_reloader()
                reloader.watch_dir(os.path.join(self.project_dir, "doc"), "**/*.rst")
                autoreload.logger.info(
                    "Watching for file changes with %s", reloader.__class__.__name__
                )
                autoreload.start_django(reloader, self.build_and_start_server, **kwargs)
            else:
                exit_code = autoreload.restart_with_reloader()
                sys.exit(exit_code)
        except KeyboardInterrupt:
            pass