// ==UserScript==
// @date			17.07.2021
// @name			CustomMediaPlayerVK
// @namespace		https://github.com/UTINKA/CustomMediaPlayerVK/
// @version			0.9
// @description		Изменённый плеер в верхнем меню для ВК
// @author			UTINKA
// @include			https://vk.com/*

// @icon
// @homepage		https://greasyfork.org/ru/scripts/376022-custommediaplayervk
// @supportURL		

// @grant			none
// @require			http://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js
// @require			https://cdnjs.cloudflare.com/ajax/libs/downloadjs/1.4.7/download.min.js

// @run-at			document-end
// @downloadURL none
// ==/UserScript==

(function()
{
	var 
		CMP = [],
		SettingsAdd = false,
		cmpvk = '0,0'
	;
	var main_box = $('#top_audio_player');
	

	function getMem(key)
	{
		var memory = localStorage.getItem(key);
		if(memory != null && memory != 'null' && memory.length != 0) return memory;
		else return false;
	}
	function setMem(key, value)
	{
		return localStorage.setItem(key, value);
	}
	
	function UpdateSettings()
	{
		var settings = cmpvk[0] + ',' + cmpvk[1];
		setMem('cmpvk', settings);
	}

	function Start()
	{
		new MutationObserver(function () 
		{
			CMPUpdate();
			if(getMem('cmpvk') != '')
			{
				cmpvk = getMem('cmpvk');
				cmpvk = cmpvk.split(',');
			}
			else if(getMem('cmpvk') == false)
			{
				var settings_start = new String(cmpvk);
				cmpvk = settings_start.split(',');
			}
			//
			if(cmpvk[0] == 0)
			{
				CMPVKsetState(false);
				if(location.href.search(/settings/) > 1 && location.href.search(/act/) == -1) $('#settings_cmpvk_state').prop("checked", false);
			}
			else if(cmpvk[0] == 1)
			{
				CMPVKsetState(true);
				if(location.href.search(/settings/) > 1 && location.href.search(/act/) == -1) $('#settings_cmpvk_state').prop("checked", true);
			}
			if(cmpvk[1] == 0)
			{
				$('.top_audio_player').css('display','block');
				if(location.href.search(/settings/) > 1 && location.href.search(/act/) == -1) $('#settings_cmpvk_player').prop("checked", false);
			}
			else if(cmpvk[1] == 1)
			{
				$('.top_audio_player').css('display','none');
				if(location.href.search(/settings/) > 1 && location.href.search(/act/) == -1) $('#settings_cmpvk_player').prop("checked", true);
			}
			//
			var sbox = $('.settings_panel');
			if(location.href.search(/settings/) > 1 && location.href.search(/act/) == -1)
			{
				if(SettingsAdd == false)
				{
					SettingsAdd = true;
					var 
						CheckBox, 
						CheckBoxPlayerState
					;
					if(cmpvk[0] == 0) CheckBox = '<input class="blind_label" type="checkbox" id="settings_cmpvk_state">';
					else if(cmpvk[0] == 1) CheckBox = '<input checked class="blind_label" type="checkbox" id="settings_cmpvk_state">';
					
					if(cmpvk[1] == 0) CheckBoxPlayerState = '<input class="blind_label" type="checkbox" id="settings_cmpvk_player">';
					else if(cmpvk[1] == 1) CheckBoxPlayerState = '<input checked class="blind_label" type="checkbox" id="settings_cmpvk_player">';

					sbox.prepend('\
						<div class="settings_line">\
							<div class="settings_info_block">\
								<div class="settings_label">Custom Media Player</br>Настройки</div>\
								<div class="settings_labeled_text">\
									<!--div class="settings_menu_link"></div-->\
									<div class="settings_narrow_row">\
										' + CheckBox + '\
										<label for="settings_cmpvk_state">Использовать плеер</label>\
									</div>\
									<div class="settings_narrow_row">\
										' + CheckBoxPlayerState + '\
										<label for="settings_cmpvk_player">Скрыть плеер</label>\
									</div>\
								</div>\
							</div>\
						</div>\
					');
					$('#settings_cmpvk_state').change(function(e)
					{
						var state = $(this).prop("checked");
						if(state == true)
						{
							cmpvk[0] = 1;
							UpdateSettings();
							CMPVKsetState(true);
						}
						else 
						{

							cmpvk[0] = 0;
							UpdateSettings();
							CMPVKsetState(false);
						}
					});
					$('#settings_cmpvk_player').change(function(e)
					{
						var state = $(this).prop("checked");
						if(state == true)
						{
							cmpvk[1] = 1;
							UpdateSettings();
							$('.top_audio_player').css('display','none');
						}
						else 
						{
							cmpvk[1] = 0;
							UpdateSettings();
							$('.top_audio_player').css('display','block');
						}
					});
				}
			}
			else
			{
				SettingsAdd = false;
			}
		}).observe(document.body, {childList: true, subtree: true});
	}
	
	function CMPVKsetState(state)
	{
		if(state == false)
		{
			main_box.css({
				'width': 'unset',
				'padding': '0 20px 0 8px'
			});
			//
			main_box.find('.top_audio_player_img').css('display','none');
			// prev
			main_box.find('.top_audio_player_prev').css({
				'position': 'relative',
				'top': 'unset',
				'bottom': 'unset',
				'left': 'unset',
				'margin': '12px 2px'
			});
			// play/pause
			main_box.find('.top_audio_player_play').css({
				'position': 'relative',
				'top': 'unset',
				'bottom': 'unset',
				'left': 'unset',
				'margin': '12px 2px'
			});
			// next
			main_box.find('.top_audio_player_next').css({
				'position': 'relative',
				'top': 'unset',
				'bottom': 'unset',
				'left': 'unset',
				'margin': '12px 2px'
			});
			//
			main_box.find('.top_audio_player_title_wrap').css({
				'position': 'relative',
				'top': 'unset',
				'left': 'unset',
				'right': 'unset',
				'bottom': 'unset',
				'margin': '14px 0 0'
			});
			main_box.find('.top_audio_player_title').css('display','inline-block');
			main_box.find('.top_audio_player_cmp_author').css('display','none');
			main_box.find('.top_audio_player_cmp_name').css('display','none');
		}
		else
		{
			main_box.css({
				'width':'100%',
				'padding':'0'
			});
			//
			main_box.find('.top_audio_player_img').css('display','block');
			// prev
			main_box.find('.top_audio_player_prev').css({
				'position': 'absolute',
				'top': '0px',
				'bottom': '0px',
				'left': '60px'
			});
			// play/pause
			main_box.find('.top_audio_player_play').css({
				'position': 'absolute',
				'top': '0px',
				'bottom': '0px',
				'left': 'calc(60px + (60px / 2))'
			});
			// next
			main_box.find('.top_audio_player_next').css({
				'position': 'absolute',
				'top': '0px',
				'bottom': '0px',
				'left': 'calc(60px + 60px)'
			});
			//
			main_box.find('.top_audio_player_title_wrap').css({
				'position': 'absolute',
				'left': 'calc(24px*3 + 48px + 10px*3)',
				'top': '0',
				'right': '0',
				'bottom': '0',
				'height': '100%',
				'margin': '0'
			});
			main_box.find('.top_audio_player_title').css('display','none');
			main_box.find('.top_audio_player_cmp_author').css('display','unset');
			main_box.find('.top_audio_player_cmp_name').css('display','unset');
		}
	}

	// css
	var CMP_CSS = '\
	<style>\
	\
	@import url(https://fonts.googleapis.com/css?family=Material+Icons);\
	\
	.top_audio_player.top_audio_player_enabled{\
		position: relative;\
		width: 100%;\
	}\
	\
	.top_audio_player_img{\
		display: block;\
		width: 48px;\
		height: 48px;\
		background-color: rgba(0,0,0,0);\
		background-image: url(/images/audio_row_placeholder.png);\
		background-repeat: no-repeat;\
		background-size: cover;\
		transition: 0.5s;\
	}\
	.top_audio_player_cmp_author{\
		opacity: 0;\
		position: absolute;\
		top: calc(48px / 2 + 2px);\
		left: 5px;\
		right: 0;\
		bottom: 0;\
		overflow: hidden;\
		white-space: nowrap;\
		text-overflow: ellipsis;\
		cursor: pointer;\
		color: var(--steel_gray_400);\
		transition: 0.2s;\
	}\
	.top_audio_player_cmp_name{\
		opacity: 0;\
		position: absolute;\
		top: calc(48px / 2 - 15px);\
		left: 5px;\
		right: 0;\
		bottom: 0;\
		overflow: hidden;\
		white-space: nowrap;\
		text-overflow: ellipsis;\
		cursor: pointer;\
		color: var(--steel_gray_400);\
		transition: 0.2s;\
	}\
	.top_audio_player_download_state{\
		opacity: 1;\
		display: block;\
		position: absolute;\
		left: 0;\
		bottom: 0;\
		height: 4px;\
		width: 0%;\
		background: #2787f5;\
		transition: 0.5s;\
	}\
	.top_audio_player_download{\
		width: 48px;\
		height: 48px;\
		background: rgb(0 0 0 / 0%);\
		display: block;\
		transition: 0.5s;\
	}\
	.top_audio_player_download:hover{\
		width: 48px;\
		height: 48px;\
		background: rgb(0 0 0 / 50%);\
		display: block;\
	}\
	.top_audio_player_download i{\
		padding: 12px;\
		transform: scale(0);\
		transition: 0.5s;\
		user-select: none;\
		pointer-events: none;\
	}\
	.top_audio_player_download:hover i{\
		transform: scale(1);\
	}\
	</style>';
	
	window.addEventListener('load',function()
	{
		if(location.href.search(/widget/)==-1)
		{
			main_box.find('.top_audio_player_title_wrap').append('\
			<div class="top_audio_player_cmp_author"></div>\
			<div class="top_audio_player_cmp_name"></div>\
			');
            main_box.append('\
			<div class="top_audio_player_img">\
				<a class="top_audio_player_download"><i class="material-icons">play_for_work</i></a>\
			</div>\
			<div class="top_audio_player_download_state">\
			</div>\
			' + CMP_CSS);
			
			// Bind
			main_box.find('.top_audio_player_download').click(function(e)
			{
				setTimeout(function()
				{
					$('.HeaderNav__item--player').click();
				},500);
				var aid = getAudioID();
				var aURL = '';
				var obj = $(this);
				var aName = obj.attr('aName');
				
				get_data(aid).then(result => 
				{
					aURL = result.url;
					download_file(aURL, aName, "audio/mp3", window.download_audio);
				});
			});
			// Start updater
			Start();
		}
	});
	
	CMP[1] = 0;
	CMP[2] = '';
	
	function CMPUpdate()
	{
		CMP[0] = getAudioPlayer()._currentAudio;
		if(CMP[0] != false)
		{
			//
			var check_track = CMP[0][4] + '_' + CMP[0][3];
			if(CMP[2] == '' || CMP[2] != check_track)
			{
				main_box.find('.top_audio_player_cmp_author').css({
					'opacity': '0',
					'transform': 'translateY(-35px)'
				});
				main_box.find('.top_audio_player_cmp_name').css({
					'opacity': '0',
					'transform': 'translateY(-25px)'
				});
				//
				if(CMP[0][14].split(',')[1] != undefined)
				{
					main_box.find('.top_audio_player_img').css('background-image', 'url(' + CMP[0][14].split(',')[1] + ')');
				}
				else main_box.find('.top_audio_player_img').css('background-image', 'url(/images/audio_row_placeholder.png)');
				CMP[2] = check_track;
				//
				clearTimeout(CMP[3]);
				CMP[3] = setTimeout(function()
				{
					main_box.find('.top_audio_player_cmp_author').css({
						'opacity': '0',
						'transform': 'translateY(35px)'
					});
					main_box.find('.top_audio_player_cmp_name').css({
						'opacity': '0',
						'transform': 'translateY(25px)'
					});
					//
					clearTimeout(CMP[3]);
					CMP[3] = setTimeout(function()
					{
						main_box.find('.top_audio_player_cmp_author').html(CMP[0][4]); // author
						main_box.find('.top_audio_player_cmp_name').html(CMP[0][3]); // music name
						//
						var download_name = main_box.find('.top_audio_player_cmp_author').text() + ' - ' + main_box.find('.top_audio_player_cmp_name').text();
						main_box.find('.top_audio_player_download').attr('title','Скачать ' + download_name).attr('aName', download_name);
						//
						main_box.find('.top_audio_player_cmp_author').css({
							'opacity': '1',
							'transform': 'translateY(0px)'
						});
						main_box.find('.top_audio_player_cmp_name').css({
							'opacity': '1',
							'transform': 'translateY(0px)'
						});
					}, 100);
				}, 100);
			}
			//
			if(Math.round(CMP[1], 2) == 100)
			{
				CMP[1] = 0;
				setTimeout(function()
				{
					$('.top_audio_player_download_state').css('opacity', '0');
					setTimeout(function()
					{
						$('.top_audio_player_download_state').css('width', '0%');
					}, 500);
				}, 1000);
			}
		}
	}
	
	function download_file(url, name, type, callback) 
	{
		$('.top_audio_player_download_state').css('opacity', '1');
		var xhr = new XMLHttpRequest();
		xhr.open("GET", url, true);
		xhr.responseType = "blob";
		xhr.onload = function() 
		{
			download(xhr.response, name + ".mp3", type);
		};
		xhr.onprogress = function(e) 
		{
			CMP[1] = e.loaded * 100 / e.total;
			$('.top_audio_player_download_state').css('width', Math.round(CMP[1], 2) + '%');
		};
		xhr.send();
	}
	
	function getAudioID()
	{
		var aid = 
		getAudioPlayer()._currentAudio[0] + '_' +
		getAudioPlayer()._currentAudio[1] + '_' + 
		getAudioPlayer()._currentAudio[13].split('//')[1].split('/')[0] + '_' +
		getAudioPlayer()._currentAudio[13].split('//')[2].split('/')[0];
		var i = AudioUtils.asObject(getAudioPlayer()._currentAudio);
		return `${i['fullId']}_${i['actionHash']}_${i['urlHash']}`;
	}
	
	function encode_url(t) 
	{
        let c = {
            'v': t=> t.split('').reverse().join(''),
            'r': (t, e) => {
                t = t.split('');
                for (let i, o = _ + _, a = t.length; a--; )
                    ~(i = o.indexOf(t[a])) && (t[a] = o.substr(i - e, 1));
                return t.join('')
            },
            's': (t,e)=> {
                let i = t.length;
                if (i) {
                    let o = ((t, e)=> {
                        let i = t.length,o = [];
                        if (i) {let a = i;
                        for (e = Math.abs(e); a--; )
                            e = (i * (a + 1) ^ e + a) % i,o[a] = e
                        }
                        return o
                    })(t, e), a = 0;
                    for (t = t.split(''); ++a < i; )
                        t[a] = t.splice(o[i - 1 - a], 1, t[a]) [0];
                    t = t.join('')}
                return t
            },
            'i': (t, e) => c['s'](t, e ^ vk.id),
            'x': (t, e,i=[])=> {
                return e = e.charCodeAt(0),
                    e(t.split(''), (t, o) =>
                    {i.push(String.fromCharCode(o.charCodeAt(0) ^ e))}),
                    i.join('')
            }
        },_ = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMN0PQRSTUVWXYZO123456789+/=',
            h=t=>{
            if (!t || t.length % 4 == 1)
                return !1;
            for (var e, i, o = 0, a = 0, s = ''; i = t.charAt(a++); )
                ~(i = _.indexOf(i)) &&
                (e = o % 4 ? 64 * e + i : i, o++ % 4) &&
                (s += String.fromCharCode(255 & e >> ( - 2 * o & 6)));
            return s
        };
        if ((!window['wbopen'] || !~(window.open + '').indexOf('wbopen')) && ~t.indexOf('audio_api_unavailable')) {
            let e = t.split('?extra=')[1].split('#'),i=''===e[1]?'':h(e[1]);
            if (e = h(e[0]), 'string' != typeof i || !e)
                return t;
            for (var o, a, s = (i = i ? i.split(String.fromCharCode(9))  : []).length; s--; ) {
                if (o = (a = i[s].split(String.fromCharCode(11))).splice(0, 1, e) [0], !c[o])
                    return t; e = c[o].apply(null, a)}if (e && 'http' === e.substr(0, 4)) return e
        }
        return t
	}
	
	function _g(url)
	{
		if(url.indexOf(".mp3?")!==-1) return url;
		else return url.replace("/index.m3u8",".mp3").replace(/\/\w{11}\//,'/');
	}

	function get_data(aid)
	{
		return new Promise(onSuccess => 
		{
			var data = undefined;
			ajax.post("/al_audio.php", {'act': 'reload_audio', 'al': '1', 'ids': aid + ""}, 
			{
				'onDone': a => 
				{
					each(a, (i, c) => 
					{
						c = AudioUtils.asObject(c);
						c['url'] = _g(encode_url(c['url']));
						data = c;
					});
					onSuccess(data);
				}
			})
		})
	}
	
})();