import re
import time

import discord

from commands import CommandError


class DiscordClient(discord.Client):

    def __init__(self, config, logger, commands):
        self.config = config
        self.logger = logger
        self.commands = commands
        self.supported_commands = [
            (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),
        ]
        self.cooldowns = {p.pattern: {} for p, _ in self.supported_commands}
        super(DiscordClient, self).__init__()

    async def start_(self):
        token = self.config['Discord'].get('token')
        await self.start(token)

    async def on_ready(self):
        self.logger.info('Logged in as {0}'.format(self.user.name))

    async def on_message(self, message):
        def check_cooldown(pattern, user):
            retries = self.config['Discord'].getint('cooldown_retries')
            seconds = self.config['Discord'].getint('cooldown_seconds')
            if user not in self.cooldowns[pattern]:
                self.cooldowns[pattern][user] = dict(tries=0, time=0)
            cooldown = self.cooldowns[pattern][user]
            if cooldown['tries'] >= retries and time.time() - cooldown['time'] <= seconds:
                return False
            cooldown['tries'] = 1 if cooldown['tries'] >= retries else cooldown['tries'] + 1
            cooldown['time'] = time.time()
            return True
        for pattern, action in self.supported_commands:
            m = pattern.match(message.content)
            if m:
                if check_cooldown(pattern.pattern, message.author.id):
                    await action(message, **m.groupdict())
                else:
                    await self.send_message(message.channel,
                        'Sorry {0}, you have to wait a while before running '
                        'the same command again'.format(message.author.mention))

    async def _do_bellagram(self, message, **kwargs):
        try:
            bellagram = self.commands.bellagram()
        except CommandError as e:
            await self.send_message(message.channel, 'Sorry {0}, {1}'.format(message.author.mention, e))
        else:
            embed = discord.Embed(title=bellagram['title'], url=bellagram['url'], color=0x8545bc)
            embed.set_image(url=bellagram['display_url'])
            embed.set_author(name=bellagram['owner'], url=bellagram['owner_url'],
                icon_url=bellagram['owner_pic_url'])
            await self.send_message(message.channel, embed=embed)

    async def _do_yt(self, message, query, **kwargs):
        try:
            result = self.commands.query_youtube(query)
        except CommandError as e:
            await self.send_message(message.channel, 'Sorry {0}, {1}'.format(message.author.mention, e))
        else:
            embed = discord.Embed(title=result['title'], url=result['url'],
                description=result['description'], color=0xff0000)
            embed.set_thumbnail(url=result['thumbnail_url'])
            embed.set_author(name=result['channel_title'], url=result['channel_url'],
                icon_url=result['channel_thumbnail_url'])
            await self.send_message(message.channel, embed=embed)