var request = require('request');
var Promise = require('promise');
var google = require('googleapis');
var apikey = 'AIzaSyBCLnmbmjjHvfScHNj8PBqINjoyLTAXEjg';

var youtube = google.youtube('v3');

var requestPromise = function (url, urlArgs) {
	var promise = new Promise(function(resolve, reject) {
		request({
			url: url,
			qs: urlArgs,
			json: false
		}, function(error, response, body) {
			if(!error && response.statusCode == 200) {
				resolve(JSON.parse(body));
			} else {
				reject(error);
			}
		});
	});
	return promise;
};

module.exports = function(config) {
	'use strict';
	return {
		getYoutubeVideoById: function(videoId) {
			var promise = new Promise(function(resolve, reject) {
				var videosParams = {
					part: 'snippet,contentDetails,statistics',
					id: videoId,
					key: apikey
				};

				youtube.videos.list(videosParams, function(err, resp) {
					//console.log('respo', resp);
					if(resp.items.length <= 0) {
						reject('No results');
						return;
					}

					var duration = resp.items[0].contentDetails.duration;
					var formattedTime = duration.replace("PT","").replace("H","t ").replace("M","m ").replace("S","s");
					var data = {
						videoId: videoId,
						url: 'https://youtu.be/'+videoId,
						title: resp.items[0].snippet.title,
						channelTitle: resp.items[0].snippet.channelTitle,
						statistics: resp.items[0].statistics,
						duration: formattedTime
					};
					resolve(data);
				});
			});
			return promise;
		},
		getYoutubeVideo: function(query) {

			var params = {
				part: 'snippet',
				q: query,
				type: 'video',
				order: 'viewCount',
				key: apikey
			};

			var promise = new Promise(function(resolve, reject) {
				youtube.search.list(params,  function(err, resp) {
					if (err) {
						console.log('An error occured', err);
						reject(err);
					}

					//console.log(resp.items[0].snippet.title);
					//console.log(resp.items[0].snippet.channelTitle);

					//console.log(resp, videoId);
					if(resp.items.length <= 0) {
						reject('No results');
						return;
					}

					var videoId = resp.items[0].id.videoId;
					var data = {
						videoId: videoId,
						url: 'https://youtu.be/'+videoId,
						title: resp.items[0].snippet.title,
						channelTitle: resp.items[0].snippet.channelTitle
					};


					var videosParams = {
						part: 'snippet,contentDetails,statistics',
						id: videoId,
						key: apikey
					};
					youtube.videos.list(videosParams, function(err2, resp2) {
						//console.log('respo', resp2);
						if(resp2.items.length <= 0) {
							reject('No results');
							return;
						}
						data.statistics = resp2.items[0].statistics;
						var duration = resp2.items[0].contentDetails.duration;
						var formattedTime = duration.replace("PT","").replace("H","t ").replace("M","m ").replace("S","s");
						data.duration = formattedTime;
						resolve(data);
					});
				});
			});

			return promise;		
		}
	};
};