# -*- coding: utf-8 -*-
""" EPG API """

from __future__ import absolute_import, division, unicode_literals

import json
import logging
from datetime import datetime, timedelta

import dateutil.parser
import dateutil.tz
import requests

_LOGGER = logging.getLogger(__name__)

GENRE_MAPPING = {
    'Detective': 0x11,
    'Dramaserie': 0x15,
    'Fantasy': 0x13,
    'Human Interest': 0x00,
    'Informatief': 0x20,
    'Komedie': 0x14,
    'Komische serie': 0x14,
    'Kookprogramma': '',
    'Misdaadserie': 0x15,
    'Politieserie': 0x17,
    'Reality': 0x31,
    'Science Fiction': 0x13,
    'Show': 0x30,
    'Thriller': 0x11,
    'Voetbal': 0x43,
}


class EpgProgram:
    """ Defines a Program in the EPG. """

    # pylint: disable=invalid-name
    def __init__(self, channel, program_title, episode_title, episode_title_original, number, season, genre, start,
                 won_id, won_program_id, program_description, description, duration, program_url, video_url, thumb,
                 airing):
        self.channel = channel
        self.program_title = program_title
        self.episode_title = episode_title
        self.episode_title_original = episode_title_original
        self.number = number
        self.season = season
        self.genre = genre
        self.start = start
        self.won_id = won_id
        self.won_program_id = won_program_id
        self.program_description = program_description
        self.description = description
        self.duration = duration
        self.program_url = program_url
        self.video_url = video_url
        self.thumb = thumb
        self.airing = airing

        if GENRE_MAPPING.get(self.genre):
            self.genre_id = GENRE_MAPPING.get(self.genre)
        else:
            self.genre_id = None

    def __repr__(self):
        return "%r" % self.__dict__


class EpgApi:
    """ GoPlay EPG API """

    EPG_ENDPOINTS = {
        'Play4': 'https://www.goplay.be/api/epg/vier/{date}',
        'Play5': 'https://www.goplay.be/api/epg/vijf/{date}',
        'Play6': 'https://www.goplay.be/api/epg/zes/{date}',
        'Play7': 'https://www.goplay.be/api/epg/zeven/{date}',
    }

    EPG_NO_BROADCAST = 'Geen uitzending'

    def __init__(self):
        """ Initialise object """
        self._session = requests.session()

    def get_epg(self, channel, date):
        """ Returns the EPG for the specified channel and date.
        :type channel: str
        :type date: str
        :rtype list[EpgProgram]
        """
        if channel not in self.EPG_ENDPOINTS:
            raise Exception('Unknown channel %s' % channel)

        if date is None:
            # Fetch today when no date is specified
            date = datetime.today().strftime('%Y-%m-%d')
        elif date == 'yesterday':
            date = (datetime.today() + timedelta(days=-1)).strftime('%Y-%m-%d')
        elif date == 'today':
            date = datetime.today().strftime('%Y-%m-%d')
        elif date == 'tomorrow':
            date = (datetime.today() + timedelta(days=1)).strftime('%Y-%m-%d')

        # Request the epg data
        response = self._get_url(self.EPG_ENDPOINTS.get(channel).format(date=date))
        data = json.loads(response)

        # Parse the results
        return [self._parse_program(channel, x) for x in data if x.get('program_title') != self.EPG_NO_BROADCAST]

    @staticmethod
    def _parse_program(channel, data):
        """ Parse the EPG JSON data to a EpgProgram object.
        :type channel: str
        :type data: dict
        :rtype EpgProgram
        """
        duration = int(data.get('duration')) if data.get('duration') else None

        # Check if this broadcast is currently airing
        timestamp = datetime.now().replace(tzinfo=dateutil.tz.gettz('CET'))
        start = datetime.fromtimestamp(data.get('timestamp')).replace(tzinfo=dateutil.tz.gettz('CET'))
        if duration:
            airing = bool(start <= timestamp < (start + timedelta(seconds=duration)))
        else:
            airing = False

        # Only allow direct playing if the linked video is the actual program
        if data.get('video_node', {}).get('latest_video'):
            video_url = (data.get('video_node', {}).get('url') or '').lstrip('/')
            thumb = data.get('video_node', {}).get('image')
        else:
            video_url = None
            thumb = None

        return EpgProgram(
            channel=channel,
            program_title=data.get('program_title'),
            episode_title=data.get('episode_title'),
            episode_title_original=data.get('original_title'),
            number=int(data.get('episode_nr')) if data.get('episode_nr') else None,
            season=data.get('season'),
            genre=data.get('genre'),
            start=start,
            won_id=int(data.get('won_id')) if data.get('won_id') else None,
            won_program_id=int(data.get('won_program_id')) if data.get('won_program_id') else None,
            program_description=data.get('program_concept'),
            description=data.get('content_episode'),
            duration=duration,
            program_url=(data.get('program_node', {}).get('url') or '').lstrip('/'),
            video_url=video_url,
            thumb=thumb,
            airing=airing,
        )

    def get_broadcast(self, channel, timestamp):
        """ Load EPG information for the specified channel and date.
        :type channel: str
        :type timestamp: str
        :rtype: EpgProgram
        """
        # Parse to a real datetime
        timestamp = dateutil.parser.parse(timestamp).replace(tzinfo=dateutil.tz.gettz('CET'))

        # Load guide info for this date
        programs = self.get_epg(channel=channel, date=timestamp.strftime('%Y-%m-%d'))

        # Find a matching broadcast
        for broadcast in programs:
            if broadcast.start <= timestamp < (broadcast.start + timedelta(seconds=broadcast.duration)):
                return broadcast

        return None

    def _get_url(self, url):
        """ Makes a GET request for the specified URL.
        :type url: str
        :rtype str
        """
        response = self._session.get(url)

        if response.status_code != 200:
            raise Exception('Could not fetch data')

        return response.text