const Lang = imports.lang;

// network requests
const Soup = imports.gi.Soup;
const Json = imports.gi.Json;

let DesktopperAdapter = new Lang.Class({
	Name: "DesktopperAdapter",
	/*
		fetch a random image url from desktopper.cc
		and call callback function with the URL of the image
	*/
	requestRandomImage: function(callback){
		let session = new Soup.SessionAsync();
		let message = Soup.Message.new('GET', 'https://api.desktoppr.co/1/wallpapers/random')

		let parser = new Json.Parser();

		var _this = this;

		session.queue_message(message, function(session, message) {
			parser.load_from_data(message.response_body.data, -1);

			let data = parser.get_root().get_object()
			let response = data.get_object_member('response');
			let imageUrl = response.get_object_member('image').get_string_member('url');

			if (callback) {
				callback(imageUrl);
			};
		});
	}
})

let WallheavenAdapter = new Lang.Class({
	Name: "WallheavenAdapter",

	// query options
	options: {
		'q': '',
		'purity': '110', // SFW, sketchy
		'sorting': 'random',
		'category': '111', // General, Anime, People
		'resolutions': ['1920x1200','2560x1440'],
	},

	/*
		fetch a random image url from wallheaven.cc with the given options
		and call callback function with the URL of the image
	*/
	requestRandomImage: function(callback){
		let session = new Soup.SessionAsync();

		let options = this.options;
		let optionsString=""

		for (var key in options) {
			if (options.hasOwnProperty(key)) {
				if (Array.isArray(options[key])) {
					optionsString += key + "=" + options[key].join() + "&";
				} else {
					optionsString += key + "=" + options[key] + "&";
				}
			}
		}
		// remove last '&'
		optionsString = optionsString.slice(0,-1);

		let url = 'http://alpha.wallhaven.cc/search?'+optionsString;

		let message = Soup.Message.new('GET', url);

		var _this = this;

		session.queue_message(message, function(session, message) {
			let body = message.response_body.data;
			let urlArray = body.match(new RegExp(/http[s]*:\/\/alpha.wallhaven.cc\/wallpaper\/[0-9]+/g));

			// remove dublicates from array
			let uniqueUrlArray = urlArray.filter(function(item, pos) {
				return urlArray.indexOf(item) == pos;
			});

			// get a random entry from the array
			var url = uniqueUrlArray[Math.floor(Math.random()*uniqueUrlArray.length)];

			message = Soup.Message.new('GET', url);

			session.queue_message(message, function(){
				let body = message.response_body.data;
				let imageUrl = body.match(new RegExp(/\/\/wallpapers.wallhaven.cc\/wallpapers\/full\/.*?"/))[0];
				imageUrl = imageUrl.slice(0,-1);
				imageUrl = 'http:' + imageUrl;

				if (callback) {
					callback(imageUrl);
				};
			})


		});
	}
})