#!/usr/bin/env python3
# -*- coding: utf-8 -*-

__name__ = "Spotify"

import base64
import datetime
from configparser import ConfigParser
from dateutil import parser
from urllib.parse import urlencode
import requests
import json
import subprocess
import logging


defaultSpotifyConfigFilePath = '../config/spotifyd.cfg'


class Spotify(object):

    def __init__(self, luniebox, configFilePath=defaultSpotifyConfigFilePath):
        self.luniebox = luniebox
        self.configFilePath = configFilePath
        self.read_config()

    def read_config(self):
        configParser = ConfigParser()
        dataset = configParser.read(self.configFilePath)
        if len(dataset) != 1:
            raise ValueError(
                "Config file {} not found!".format(self.configFilePath))
        self.config = configParser

    def get_setting(self, key, default=None):
        if self.config.has_option('global', key):
            return self.config['global'][key].strip('\"')
        return default

    def set_setting(self, key, value):
        if not self.config.has_section('global'):
            self.config.add_section('global')
        self.config.set('global', key, str('\"' + value + '\"'))

        with open(self.configFilePath, 'w') as configfile:
            self.config.write(configfile)

    def get_status(self):
        devices = self.devices()
        device_id = self.luniebox.get_setting('spotify', 'device_id')
        device_name = self.get_setting('device_name')
        status = {
            'status': False,
            'device_name': device_name,
            'device_id': device_id,
            'errors': {'setup': True, 'not_running': True}
        }

        if not device_id:
            status['errors']['not_running'] = False
            for device in devices['devices']:
                if device['name'] == device_name:
                    device_id = device['id']
                    self.luniebox.get_setting(
                        'spotify', 'device_id', device_id)
                    status['errors']['setup'] = False
        else:
            status['errors']['setup'] = False
            for device in devices['devices']:
                if device['id'] == device_id:
                    status['errors']['not_running'] = False

        if status['errors']['not_running'] and self.transfer_playback():
            status['errors']['not_running'] = False

        return status

    def get_access_token(self):
        access_token = self.luniebox.get_setting('spotify', 'access_token')
        if not access_token:
            return False

        token_expires = parser.parse(
            self.luniebox.get_setting('spotify', 'token_expires'))

        if token_expires < datetime.datetime.now():
            self.refresh_access_token()
            return self.get_access_token()

        return access_token

    def new_access_token(self, code):
        clientId = self.luniebox.get_setting('spotify', 'client_id')
        clientSecret = self.luniebox.get_setting('spotify', 'client_secret')
        redirectUri = self.luniebox.get_setting('spotify', 'redirect_uri')

        credentials = clientId + ":" + clientSecret

        headers = {
            'Content-Type': 'application/x-www-form-urlencoded',
            'Authorization': 'Basic ' + str(base64.b64encode(credentials.encode('utf-8')), 'utf-8')
        }

        formData = {
            'code': code,
            'redirect_uri': redirectUri,
            'grant_type': 'authorization_code'
        }

        response = requests.post(
            'https://accounts.spotify.com/api/token', headers=headers, data=formData)

        tokenData = response.json()

        self.luniebox.set_setting(
            'spotify', 'access_token', tokenData['access_token'])
        self.luniebox.set_setting('spotify', 'refresh_token',
                                  tokenData['refresh_token'])
        self.luniebox.set_setting('spotify', 'token_expires', str(datetime.datetime.now(
        ) + datetime.timedelta(seconds=tokenData['expires_in'])))

    def refresh_access_token(self):
        clientId = self.luniebox.get_setting('spotify', 'client_id')
        clientSecret = self.luniebox.get_setting('spotify', 'client_secret')
        refresh_token = self.luniebox.get_setting('spotify', 'refresh_token')

        if not refresh_token:
            return False

        credentials = clientId + ":" + clientSecret

        headers = {
            'Content-Type': 'application/x-www-form-urlencoded',
            'Authorization': 'Basic ' + str(base64.b64encode(credentials.encode('utf-8')), 'utf-8')
        }

        formData = {
            'refresh_token': refresh_token,
            'grant_type': 'refresh_token'
        }

        response = requests.post(
            'https://accounts.spotify.com/api/token', headers=headers, data=formData)

        tokenData = response.json()

        self.luniebox.set_setting(
            'spotify', 'access_token', tokenData['access_token'])
        self.luniebox.set_setting('spotify', 'token_expires', str(datetime.datetime.now(
        ) + datetime.timedelta(seconds=tokenData['expires_in'])))

    def api_call(self, url):
        access_token = self.get_access_token()
        headers = {
            'Authorization': 'Bearer ' + access_token
        }

        return requests.get(
            'https://api.spotify.com/v1' + url, headers=headers)

    def search(self, query, types, limit, offset=0):
        if limit > 50:
            limit = 50
        response = self.api_call(
            '/search?' + urlencode({'q': query, 'type': ','.join(types), 'limit': limit, 'offset': offset}))

        if response.status_code == 200:
            return response.json()
        elif response.status_code == 404 and self.luniebox.spotify_connect(restart=True):
            return self.search(query, types, limit, offset)

        return False

    def playback_state(self):
        response = self.api_call('/me/player')

        if response.status_code == 200:
            return response.json()

        if response.status_code == 204:
            return {"not_active": True}
        elif response.status_code == 404 and self.luniebox.spotify_connect(restart=True):
            return self.playback_state()

        return False

    def transfer_playback(self):
        device_id = self.luniebox.get_setting('spotify', 'device_id')
        access_token = self.get_access_token()
        headers = {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer ' + access_token
        }

        data = {
            'device_ids': [device_id],
            'play': False
        }

        response = requests.put(
            'https://api.spotify.com/v1/me/player', headers=headers, data=json.dumps(data))

        if response.status_code == 204 or response.status_code == 202:
            return True
        elif response.status_code == 404 and self.luniebox.spotify_connect(restart=True):
            return self.transfer_playback()

        logging.getLogger('luniebox').warn(
            "error on spotify transfer playback", response, response.text)
        return False

    def is_active(self):
        self.transfer_playback()
        state = self.playback_state()
        device_id = self.luniebox.get_setting('spotify', 'device_id')
        if not state:
            return False
        return 'device' in state and 'id' in state['device'] and state['device']['id'] == device_id

    def devices(self):
        response = self.api_call('/me/player/devices')
        return response.json()

    def play(self, uri):
        device_id = self.luniebox.get_setting('spotify', 'device_id')
        access_token = self.get_access_token()
        headers = {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer ' + access_token
        }

        data = {}

        if uri:
            if uri.startswith('spotify:track:') or uri.startswith('spotify:episode:'):
                data = {
                    "uris": [uri]
                }
            else:
                data = {
                    "context_uri": uri
                }

        response = requests.put(
            'https://api.spotify.com/v1/me/player/play?' +
            urlencode({'device_id': device_id}), headers=headers, data=json.dumps(data))

        if response.status_code == 204 or response.status_code == 202:
            return True
        elif response.status_code == 404 and self.luniebox.spotify_connect(restart=True):
            return self.play(uri)

        logging.getLogger('luniebox').warn(
            "error on spotify play", response, response.text)
        return False

    def pause(self):
        device_id = self.luniebox.get_setting('spotify', 'device_id')
        access_token = self.get_access_token()
        headers = {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer ' + access_token
        }
        response = requests.put(
            'https://api.spotify.com/v1/me/player/pause?' +
            urlencode({'device_id': device_id}), headers=headers)

        if response.status_code == 204 or response.status_code == 202:
            return True
        elif response.status_code == 404 and self.luniebox.spotify_connect(restart=True):
            return self.pause()

        logging.getLogger('luniebox').warn(
            "error on spotify pause", response, response.text)
        return False

    def volume(self, value):
        device_id = self.luniebox.get_setting('spotify', 'device_id')
        access_token = self.get_access_token()
        headers = {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer ' + access_token
        }

        if value < 0:
            value = 0
        if value > 100:
            value = 100

        response = requests.put(
            'https://api.spotify.com/v1/me/player/volume?' +
            urlencode({'device_id': device_id, 'volume_percent': value}), headers=headers)

        if response.status_code == 204 or response.status_code == 202:
            return True
        elif response.status_code == 404 and self.luniebox.spotify_connect(restart=True):
            return self.volume(value)

        logging.getLogger('luniebox').warn(
            "error on spotify volume", response, response.text)
        return False

    def seek(self, position):
        device_id = self.luniebox.get_setting('spotify', 'device_id')
        access_token = self.get_access_token()
        headers = {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer ' + access_token
        }

        if position < 0:
            position = 0

        response = requests.put(
            'https://api.spotify.com/v1/me/player/seek?' +
            urlencode({'device_id': device_id, 'position_ms': position}), headers=headers)

        if response.status_code == 204 or response.status_code == 202:
            return True
        elif response.status_code == 404 and self.luniebox.spotify_connect(restart=True):
            return self.seek(position)

        logging.getLogger('luniebox').warn(
            "error on spotify seek", response, response.text)
        return False

    def rewind(self, seconds):
        state = self.playback_state()
        if state and 'progress_ms' in state:
            progress = int(state['progress_ms'])
            progress -= seconds * 1000
            return self.seek(progress)

        return False

    def fastforward(self, seconds):
        state = self.playback_state()
        if state and 'progress_ms' in state:
            progress = int(state['progress_ms'])
            progress += seconds * 1000
            return self.seek(progress)

        return False

    def previous(self):
        device_id = self.luniebox.get_setting('spotify', 'device_id')
        access_token = self.get_access_token()
        headers = {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer ' + access_token
        }

        response = requests.post(
            'https://api.spotify.com/v1/me/player/previous?' +
            urlencode({'device_id': device_id}), headers=headers)

        if response.status_code == 204 or response.status_code == 202:
            return True
        elif response.status_code == 404 and self.luniebox.spotify_connect(restart=True):
            return self.previous()

        logging.getLogger('luniebox').warn(
            "error on spotify previous", response, response.text)
        return False

    def next(self):
        device_id = self.luniebox.get_setting('spotify', 'device_id')
        access_token = self.get_access_token()
        headers = {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer ' + access_token
        }

        response = requests.post(
            'https://api.spotify.com/v1/me/player/next?' +
            urlencode({'device_id': device_id}), headers=headers)

        if response.status_code == 204 or response.status_code == 202:
            return True
        elif response.status_code == 404 and self.luniebox.spotify_connect(restart=True):
            return self.next()

        logging.getLogger('luniebox').warn(
            "error on spotify next", response, response.text)
        return False