import functools
import re
import unicodedata

import irc.bot

from commands import CommandError


# $username --> Sweet! Thanks for the quote! #$id: $response
QUOTE_ADDED_PATTERN = re.compile(r'''^
    (?P<user>.+)\s+-->\s+
    Sweet!\s+Thanks\s+for\s+the\s+quote!\s+
    \#(?P<id>\d+):\s+
    (?P<text>.+)\s+
    \[(?P<game>.+)\]\s+
    \[(?P<date>.+)\]$''', re.VERBOSE)

# $username --> Successfully edited Quote #$id: $response
QUOTE_EDITED_PATTERN = re.compile(r'''^
    (?P<user>.+)\s+-->\s+
    Successfully\s+edited\s+Quote\s+
    \#(?P<id>\d+):\s+
    (?P<text>.+)\s+
    \[(?P<game>.+)\]\s+
    \[(?P<date>.+)\]$''', re.VERBOSE)

# $username --> Successfully deleted Quote #$id.
QUOTE_REMOVED_PATTERN = re.compile(r'''^
    (?P<user>.+)\s+-->\s+
    Successfully\s+deleted\s+Quote\s+
    \#(?P<id>\d+)\.$''', re.VERBOSE)


class TwitchClient(irc.bot.SingleServerIRCBot):
    def __init__(self, config, logger, commands):
        self.config = config
        self.logger = logger
        self.commands = commands
        self.patterns = [
            (QUOTE_ADDED_PATTERN, self._add_quote),
            (QUOTE_EDITED_PATTERN, self._edit_quote),
            (QUOTE_REMOVED_PATTERN, self._remove_quote),
        ]
        self.supported_commands = [
            (re.compile(r'^!lastquote$'), self._do_lastquote),
            (re.compile(r'^!findquote\s+(?P<q>")?(?P<filter>.+)(?(q)")$'), self._do_findquote),
            (re.compile(r'^!syncquotes$'), self._do_syncquotes),
            (re.compile(r'^!(bella(gram|pics)|insta(gram|bella))$'), self._do_bellagram),
            (re.compile(r'^!yt\s+(?P<q>")?(?P<query>.+)(?(q)")$'), self._do_yt),
            (re.compile(r'^!clip\s+(?P<q>")?(?P<filter>.+)(?(q)")$'), self._do_clip),
            (re.compile(r'^!reload$'), self._do_reload),
        ]
        server = self.config['IRC'].get('server')
        port = self.config['IRC'].getint('port')
        nickname = self.config['IRC'].get('nickname')
        token = self.config['Twitch'].get('token')
        self.logger.info('Connecting to %s:%d', server, port)
        super(TwitchClient, self).__init__([(server, port, token)], nickname, nickname)

    def connect_(self):
        self._connect()

    def process_data(self):
        self.reactor.process_once()

    def on_welcome(self, connection, event):
        connection.cap('REQ', ':twitch.tv/membership')
        connection.cap('REQ', ':twitch.tv/tags')
        connection.cap('REQ', ':twitch.tv/commands')
        for channel in self.config['IRC'].get('channels').split(','):
            channel = '#{0}'.format(channel)
            self.logger.info('Joining %s', channel)
            connection.join(channel)

    def on_join(self, connection, event):
        self.logger.info('Joined %s', event.target)

    def on_pubmsg(self, connection, event):
        self._process_message(connection, event)

    def on_whisper(self, connection, event):
        self._process_message(connection, event)

    def _send_response(self, connection, event, msg):
        if event.target.startswith('#'):
            connection.privmsg(event.target, msg)
        else:
            connection.privmsg('#jtv', '/w {0} {1}'.format(event.source.nick, msg))

    def _process_message(self, connection, event):
        tags = {t['key']: t['value'] for t in event.tags}
        message = ''.join([c for c in event.arguments[0] if not unicodedata.category(c).startswith('C')])
        message = message.rstrip()
        send_response = functools.partial(self._send_response, connection, event)
        for pattern, action in self.patterns + self.supported_commands:
            m = pattern.match(message)
            if m:
                action(tags, send_response, **m.groupdict())
        for cmd, resp in self.config['Extra Commands'].items():
            if cmd == message:
                send_response(resp)

    def _add_quote(self, tags, send_response, user, id, text, game, date, **kwargs):
        if text[0] == text[-1] == '"':
            text = text[1:-1]
        self.logger.info('Adding quote %s: %s', id, text)
        try:
            self.commands.add_quote(id, text, game, date)
        except CommandError as e:
            self.logger.error('Failed to add quote: %s', e)

    def _edit_quote(self, tags, send_response, user, id, text, game, date, **kwargs):
        if text[0] == text[-1] == '"':
            text = text[1:-1]
        self.logger.info('Editing quote %s: %s', id, text)
        try:
            self.commands.edit_quote(id, text, game, date)
        except CommandError as e:
            self.logger.error('Failed to add quote: %s', e)

    def _remove_quote(self, tags, send_response, user, id, **kwargs):
        self.logger.info('Removing quote %s', id)
        try:
            self.commands.remove_quote(id)
        except CommandError as e:
            self.logger.error('Failed to remove quote: %s', e)

    def _do_lastquote(self, tags, send_response, **kwargs):
        try:
            quote = self.commands.last_quote()
        except CommandError as e:
            send_response('Sorry @{0}, {1}'.format(tags['display-name'], e))
        else:
            if self.config['Quotes'].getboolean('act_as_proxy'):
                send_response('!quote {0}'.format(quote['id']))
            else:
                send_response('One time, Lilia said this... #{id}: "{text}" [{game}] [{date}]'.format(**quote))

    def _do_findquote(self, tags, send_response, filter, **kwargs):
        try:
            quote = self.commands.find_quote(filter)
        except CommandError as e:
            send_response('Sorry @{0}, {1}'.format(tags['display-name'], e))
        else:
            if self.config['Quotes'].getboolean('act_as_proxy'):
                send_response('!quote {0}'.format(quote['id']))
            else:
                send_response('One time, Lilia said this... #{id}: "{text}" [{game}] [{date}]'.format(**quote))

    def _do_syncquotes(self, tags, send_response, **kwargs):
        master_user_id = self.config['Twitch'].getint('master_user_id')
        if int(tags['user-id']) != master_user_id:
            respond('Sorry @{0}, you are not allowed to do this'.format(tags['display-name']))
            return
        try:
            messages = self.commands.get_quote_messages()
        except CommandError as e:
            self.logger.error('Failed to get quote messages: %s', e)
        else:
            for message in messages:
                for pattern, action in self.patterns:
                    m = pattern.match(message)
                    if m:
                        action(tags, send_response, **m.groupdict())

    def _do_bellagram(self, tags, send_response, **kwargs):
        try:
            bellagram = self.commands.bellagram()
        except CommandError as e:
            send_response('Sorry @{0}, {1}'.format(tags['display-name'], e))
        else:
            send_response(bellagram['url'])

    def _do_yt(self, tags, send_response, query, **kwargs):
        try:
            result = self.commands.query_youtube(query)
        except CommandError as e:
            send_response('Sorry @{0}, {1}'.format(tags['display-name'], e))
        else:
            send_response('{0}: {1}'.format(result['title'], result['url']))

    def _do_clip(self, tags, send_response, filter, **kwargs):
        try:
            result = self.commands.find_clip(filter)
        except CommandError as e:
            send_response('Sorry @{0}, {1}'.format(tags['display-name'], e))
        else:
            send_response('{0}: {1}'.format(result['title'], result['url']))

    def _do_reload(self, tags, send_response, **kwargs):
        master_user_id = self.config['Twitch'].getint('master_user_id')
        if int(tags['user-id']) != master_user_id:
            respond('Sorry @{0}, you are not allowed to do this'.format(tags['display-name']))
            return
        self.config.remove_section('Extra Commands')
        self.config.read('settings.cfg')