import configparser
import logging
import os
import re
import string

import dateutil.parser
import irc.bot
import requests

from twitch import Twitch


config = configparser.ConfigParser()
config.read('settings.cfg')


log = logging.getLogger('irc.client')
log.addHandler(logging.StreamHandler())
log.setLevel(logging.DEBUG if bool(int(os.getenv('DEBUG', 0))) else logging.INFO)


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)

# TODO: quote_edited, quote_removed


class TwitchBot(irc.bot.SingleServerIRCBot):
    def __init__(self):
        self.patterns = [
            (QUOTE_ADDED_PATTERN, self.add_quote),
        ]
        self.commands = [
            (re.compile(r'^!lastquote$'), self.last_quote),
            (re.compile(r'^!findquote\s+(?P<q>")?(?P<filter>.+)(?(q)")$'), self.find_quote),
            (re.compile(r'^!sync(\s+(?P<since>.+))?$'), self.sync),
        ]
        self.server = config['IRC'].get('server', 'irc.chat.twitch.tv')
        self.port = config['IRC'].getint('port', 6667)
        self.nickname = config['IRC'].get('nickname')
        self.channel = '#{0}'.format(config['IRC'].get('channel'))
        self.token = config['Twitch'].get('token')
        self.master_user_id = config['Twitch'].getint('master_user_id')
        self.api_url = config['Quotes'].get('api_url')
        self.api_key = config['Quotes'].get('api_key')
        log.info('Connecting to %s:%d', self.server, self.port)
        super(TwitchBot, self).__init__([(self.server, self.port, self.token)],
                                        self.nickname, self.nickname)

    def on_welcome(self, connection, event):
        connection.cap('REQ', ':twitch.tv/membership')
        connection.cap('REQ', ':twitch.tv/tags')
        connection.cap('REQ', ':twitch.tv/commands')
        log.info('Joining %s', self.channel)
        connection.join(self.channel)

    def on_join(self, connection, event):
        log.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 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 c in string.printable])
        message = message.rstrip()
        for pattern, action in self.patterns + self.commands:
            m = pattern.match(message)
            if m:
                action(connection, tags, **m.groupdict())

    def get(self, params):
        r = requests.get('{0}/quotes'.format(self.api_url), params=params)
        r.raise_for_status()
        return r.json()

    def post(self, data):
        r = requests.post('{0}/quotes'.format(self.api_url), data=data,
                          headers={'X-Quotes-API-Key': self.api_key})
        r.raise_for_status()
        return r.json()

    def delete(self, id):
        r = requests.delete('{0}/quote/{1}'.format(self.api_url, id),
                            headers={'X-Quotes-API-Key': self.api_key})
        r.raise_for_status()
        return r.json()

    def last_quote(self, connection, tags, **kwargs):
        try:
            quotes = self.get(dict(
                sort_by='id',
                sort_order='desc',
                page_size=1))
            quote = quotes[0]
        except (requests.exceptions.HTTPError, IndexError):
            msg = 'Sorry @{0}, no quotes found'.format(tags['display-name'])
        else:
            msg = '!quote {0}'.format(quote['id'])
        connection.privmsg(self.channel, msg)

    def find_quote(self, connection, tags, filter, **kwargs):
        if len(filter) < 3:
            msg = 'Sorry @{0}, the search phrase is too short'.format(tags['display-name'])
            connection.privmsg(self.channel, msg)
            return
        try:
            quotes = self.get(dict(
                filter=filter,
                sort_by='id',
                sort_order='desc',
                page_size=1))
            quote = quotes[0]
        except (requests.exceptions.HTTPError, IndexError):
            msg = 'Sorry @{0}, no quotes found'.format(tags['display-name'])
        else:
            msg = '!quote {0}'.format(quote['id'])
        connection.privmsg(self.channel, msg)

    def sync(self, connection, tags, since=None, **kwargs):
        if int(tags['user-id']) != self.master_user_id:
            msg = 'Sorry @{0}, you are not allowed to do this'.format(tags['display-name'])
            connection.privmsg(self.channel, msg)
            return
        if since is None:
            try:
                quotes = self.get(dict(
                    sort_by='id',
                    sort_order='desc',
                    page_size=1))
                quote = quotes[0]
            except requests.exceptions.HTTPError as e:
                log.error('Failed to get quotes: %s', str(e))
                return
            except IndexError:
                log.error('No quotes available')
                return
            else:
                since = quote['date']
        api_url = config['Twitch'].get('api_url')
        client_id = config['Twitch'].get('client_id')
        user_id = config['Twitch'].getint('target_user_id')
        since = dateutil.parser.parse(since).date()
        messages = Twitch(api_url, client_id, log).get_messages(user_id, since)
        if not messages:
            return
        for message in messages:
            for pattern, action in self.patterns:
                m = pattern.match(message)
                if m:
                    action(connection, None, **m.groupdict())
        msg = '@{0}, sync completed'.format(tags['display-name'])
        connection.privmsg(self.channel, msg)

    def add_quote(self, connection, tags, user, id, text, game, date, **kwargs):
        log.info('Adding quote %s: %s', id, text)
        try:
            self.post(dict(
                id=int(id) + 10000, # FIXME
                date=dateutil.parser.parse(date, dayfirst=True).date().isoformat(),
                game=game,
                text=text))
        except requests.exceptions.HTTPError as e:
            log.error('Failed to add quote: %s', str(e))


def main():
    bot = TwitchBot()
    bot.start()


if __name__ == "__main__":
    main()