import re

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),
        ]
        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):
        for pattern, action in self.supported_commands:
            m = pattern.match(message.content)
            if m:
                await action(message, **m.groupdict())

    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)