import random

import dateutil.parser
import requests

from services.instagram import Instagram, InstagramError
from services.twitch import Twitch, TwitchError
from services.youtube import Youtube, YoutubeError


class CommandError(Exception):
    pass


class Commands(object):
    def __init__(self, config, logger):
        self.config = config
        self.logger = logger
        self._bellagrams = self._collect_bellagrams()

    def add_quote(self, id, text, game, date):
        try:
            self._post_quotes(dict(
                id=int(id),
                date=dateutil.parser.parse(date, dayfirst=True).date().isoformat(),
                game=game,
                text=text))
        except requests.exceptions.HTTPError as e:
            raise CommandError(e)

    def edit_quote(self, id, text, game, date):
        try:
            self._post_quotes(dict(
                id=int(id),
                date=dateutil.parser.parse(date, dayfirst=True).date().isoformat(),
                game=game,
                text=text))
        except requests.exceptions.HTTPError as e:
            raise CommandError(e)

    def remove_quote(self, id):
        try:
            self._delete_quotes(int(id))
        except requests.exceptions.HTTPError as e:
            raise CommandError(e)

    def get_twitch_messages(self, since):
        if since is None:
            try:
                quotes = self._get_quotes(dict(
                    sort_by='id',
                    sort_order='desc',
                    page_size=1)).json()
                quote = quotes.pop(0)
            except requests.exceptions.HTTPError:
                raise CommandError(e)
            except IndexError:
                raise CommandError(e)
            else:
                since = quote['date']
        api_url = self.config['Twitch'].get('api_url')
        client_id = self.config['Twitch'].get('client_id')
        channel_id = self.config['Twitch'].getint('channel_id')
        since = dateutil.parser.parse(since).date()
        twitch = Twitch(api_url, client_id)
        try:
            return twitch.get_messages(channel_id, since)
        except TwitchError as e:
            raise CommandError(e)

    def last_quote(self):
        try:
            quotes = self._get_quotes(dict(
                sort_by='id',
                sort_order='desc',
                page_size=1)).json()
            quote = quotes.pop(0)
        except (requests.exceptions.HTTPError, IndexError):
            raise CommandError('no quotes found')
        else:
            return quote

    def find_quote(self, filter):
        if len(filter) < 3:
            raise CommandError('the search phrase is too short')
        try:
            quotes = self._get_quotes(dict(
                filter=filter,
                sort_order='random',
                page_size=1)).json()
            quote = quotes.pop(0)
        except (requests.exceptions.HTTPError, IndexError):
            raise CommandError('no quotes found')
        else:
            return quote

    def bellagram(self):
        if not self._bellagrams:
            raise CommandError('couldn\'t get any media from Instagram')
        return random.choice(self._bellagrams)

    def query_youtube(self, query):
        api_key = self.config['Youtube'].get('api_key')
        channel_ids = self.config['Youtube'].get('channel_ids').split(',')
        yt = Youtube(api_key)
        try:
            for channel_id in channel_ids:
                results = yt.search(channel_id, query, playlists=True, limit=1)
                if results:
                    break
                results = yt.search(channel_id, query, playlists=False, limit=1)
                if results:
                    break
            result = results.pop(0)
        except (YoutubeError, IndexError):
            raise CommandError('couldn\'t find anything on Youtube')
        else:
            return result

    def _get_quotes(self, params):
        api_url = self.config['Quotes'].get('api_url')
        r = requests.get('{0}/quotes'.format(api_url), params=params)
        r.raise_for_status()
        return r

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

    def _delete_quotes(self, id):
        api_url = self.config['Quotes'].get('api_url')
        api_key = self.config['Quotes'].get('api_key')
        r = requests.delete('{0}/quotes/{1}'.format(api_url, id),
                            headers={'X-Quotes-API-Key': api_key})
        r.raise_for_status()
        return r

    def _collect_bellagrams(self):
        username = self.config['Instagram'].get('username')
        keywords = self.config['Instagram'].get('keywords').split(',')
        instagram = Instagram(username)
        try:
            media = instagram.get_media()
            media = [m for m in media if [k for k in keywords \
                if m['type'] == 'Image' and k.lower() in m['title'].lower()]]
        except (InstagramError, IndexError):
            return None
        else:
            return media