import signal, sys
from src import Config, ModuleManager, utils

class Module(ModuleManager.BaseModule):
    def on_load(self):
        self._exited = False
        signal.signal(signal.SIGINT, self.SIGINT)
        signal.signal(signal.SIGUSR1, self.SIGUSR1)
        signal.signal(signal.SIGHUP, self.SIGHUP)

    def SIGINT(self, signum, frame):
        print()
        self.bot.trigger(lambda: self._kill(signum))

    def _kill(self, signum):
        if self._exited:
            return
        self._exited = True

        self.events.on("signal.interrupt").call(signum=signum)

        written = False
        for server in self.bot.servers.values():
            if server.connected:
                server.socket.clear_send_buffer()

                line = utils.irc.protocol.quit("Shutting down")
                sent_line = server.send(line, immediate=True)
                sent_line.events.on("send").hook(self._make_hook(server))

                server.send_enabled = False
                written = True

        if not written:
            sys.exit()

    def _make_hook(self, server):
        return lambda e: self.bot.disconnect(server)

    def SIGUSR1(self, signum, frame):
        self.bot.trigger(self._reload_config)

    def SIGHUP(self, signum, frame):
        self.bot.trigger(self._SIGHUP)
    def _SIGHUP(self):
        self._reload_config()
        self._reload_modules()

    def _reload_config(self):
        self.bot.log.info("Reloading config file", [])
        self.bot.config.load()
        self.bot.log.info("Reloaded config file", [])

    def _reload_modules(self):
        self.bot.log.info("Reloading modules", [])

        success = []
        fail = []
        for name in list(self.bot.modules.modules.keys()):
            try:
                self.bot.modules.unload_module(name)
            except ModuleManager.ModuleWarning:
                continue
            except Exception as e:
                failed.append(name)
                continue
        load_success, load_fail = self.bot.load_modules(safe=True)
        fail.extend(load_fail)

        self.bot.log.info("Reloaded %d modules (%d failed)",
            [len(load_success), len(fail)])