function authInfo(response) {
	if (typeof response != 'undefined' && response.session) {
		Session.setVkParams(response.session);
		$('#vk_login, .auth_notice').hide();
		$('#vk_logout').css('display', 'block');
		if ($('#search_field').length > 0) {
			$('#search_field').focus();
		}
		Session.query('/user/auth', {}, function(ar){
			if (!ar.username) {
				VK.Api.call('getVariable', {key: 1281}, function(r) {
					Session.query('/user/update', {'name': r.response}, function(ar2) {
						$('#header-container .hello .greating').text('Hi there, '+ (ar2.username ? ar2.username : '%username%') +'!');
					});
				});
			}
			$('#header-container .hello .greating').text('Hi there, '+ (ar.username ? ar.username : '%username%') +'!');
			Session.user_id = ar.id;
		});
	} else {
		$('#vk_login, .auth_notice').css('display', 'block');
		$('#vk_logout').hide();
	}
}
$(function(){
	VK.init({
		apiId: (document.location.host == 'beathaven.org' ? 2335068 : 2383163),
		nameTransportPath: "/xd_receiver.html"
	});
	VK.Auth.getLoginStatus(authInfo);
	$('#vk_login').click(function(){
		VK.Auth.login(authInfo, 8);
	});
	$('#vk_logout').click(function(){
		VK.Auth.logout(authInfo);
	});
})

function loadTracksData(artist, track, duration, callback) {
	track_prepared = track.replace(/\(.*\)/i, '').split('/')[0];
	VK.Api.call('audio.search', {q: artist +' '+ track_prepared}, function(r){
		callback(matchPerfectResult(r.response, artist, track, duration));
	})
}

function matchPerfectResult(data, artist, track, duration) {
	var duration = duration.split(':');
	if (duration[1].charAt(0) === '0') {
		duration[1] = duration[1].substring(1);
	}
	duration = parseInt(duration[0]) * 60 + parseInt(duration[1]);
	var best_score = 0;
	var best_result = null;
	for (var i = 1; i < data.length; i++) {
		var score = 0;
		if (data[i].artist === artist) {
			score += 10;
		} else if (data[i].artist.split(artist).length === 2) {
			score += 5;
		} else if (data[i].title.split(artist).length === 2) {
			score += 4;
		}
		if (data[i].title === track) {
			score += 10;
		} else if (data[i].title.split(track).length === 2) {
			score += 5;
		}
		if (parseInt(data[i].duration) === duration) {
			score += 15;
		} else {
			var delta = Math.abs(parseInt(data[i].duration) - duration);
			if (delta < 10) {
				score += (10 - delta);
			}
		}
		if (score > best_score) {
			best_score = score;
			best_result = data[i];
		}
		if (score === 35) {
			return best_result.url;
		}
	}
	return best_result.url;
}