/**
 * Embed plugin by gohabereg
 * @version 1.0.0
 */
var embed = function(embed_plugin){

    var methods = {

        addInternal: function (content) {
            codex.editor.content.switchBlock(codex.editor.content.currentNode, content);

            var blockContent = codex.editor.content.currentNode.childNodes[0];
            blockContent.classList.add('embed__loader');

            setTimeout(function(){
                blockContent.classList.remove('embed__loader');
            }, 1000);

        },

        getHtmlWithEmbedId: function (type, id) {
            return services[type].html.replace(/<\%\= remote\_id \%\>/g, id);
        },

        makeElementFromHtml: function(html) {
            var wrapper = document.createElement('DIV');

            wrapper.innerHTML = html;

            return wrapper;
        },

        getRemoteId: function(source, execArray) {

            switch(source) {
                case 'yandex-music-track':
                    id = execArray[2]+'/'+execArray[1];
                    break;
                case 'yandex-music-playlist':
                    id = execArray[1]+'/'+execArray[2];
                    break;
                default:
                    id = execArray[1];
            }

            return id;
        }
    };

    var services = {
        youtube: {
            regex: /^.*(?:(?:youtu\.be\/)|(?:youtube\.com)\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=)([^#\&\?]*)(?:[\?\&]t\=(\d*)|)/,
            html: "<iframe src=\"https://www.youtube.com/embed/<%= remote_id %>\" style=\"width:100%;\" height=\"320\" frameborder=\"0\" allowfullscreen></iframe>",
            height: 320,
            width: 580
        }
    };


    embed_plugin.make = function(data, isInternal) {

        if (!data.remote_id)
            return;

        var html  = methods.getHtmlWithEmbedId(data.source, data.remote_id),
            block = methods.makeElementFromHtml(html);

        block.dataset.remoteId = data.remote_id;
        block.dataset.source = data.source;
        block.dataset.thumbnailUrl = data.thumbnailUrl;

        block.classList.add('embed');

        // var sidePadding = (600 - services[data.source].width) / 2 + 'px';

        // block.style.padding = '30px ' + sidePadding;

        if (isInternal) {
            methods.addInternal(block);
        }

        return block;

    };

    /**
     * Saving JSON output.
     * Upload data via ajax
     */
    embed_plugin.save = function(blockContent) {

        if (!blockContent)
            return;

        var data,
            source = blockContent.dataset.source;

        data = {
            source: source,
            remote_id: blockContent.dataset.remoteId,
            thumbnailUrl: blockContent.dataset.thumbnailUrl,
            height: services[source].height,
            width: services[source].width
        };

        return data;

    };

    /**
     * Render data
     */
    embed_plugin.render = function(data) {
        return embed_plugin.make(data);
    };

    embed_plugin.urlPastedCallback = function(url, pattern) {

        var execArray = pattern.regex.exec(url),
            id = methods.getRemoteId(pattern.type, execArray);

        var data = {
            source: pattern.type,
            remote_id: id,
            thumbnailUrl: url
        };

        embed_plugin.make(data, true);
    };

    embed_plugin.validate = function(savedData) {

        var source = savedData.source,
            execArray = services[source].regex.exec(savedData.thumbnailUrl),
            remoteId = methods.getRemoteId(source, execArray);

        return remoteId == savedData.remote_id;

    };

    embed_plugin.pastePatterns = [
        {
            type: 'vk',
            regex: /https?:\/\/vk\.com\/.*(?:video)([-0-9]+_[0-9]+)/, ///https?.+vk?.com\/feed\?w=wall\d+_\d+/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'youtube',
            regex: /(?:https?:\/{2})?(?:w{3}\.)?youtu(?:be)?\.(?:com|be)(?:\/watch\?v=|\/)([^\s&]+)/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'vimeo',
            regex: /(?:http[s]?:\/\/)?(?:www.)?vimeo\.co(?:.+\/([^\/]\d+)(?:#t=[\d]+)?s?$)/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'coub',
            regex: /https?:\/\/coub\.com\/view\/([^\/\?\&]+)/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'vine',
            regex: /https?:\/\/vine\.co\/v\/([^\/\?\&]+)/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'imgur',
            regex: /https?:\/\/(?:i\.)?imgur\.com.*\/([a-zA-Z0-9]+)(?:\.gifv)?/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'gfycat',
            regex: /https?:\/\/gfycat\.com(?:\/detail)?\/([a-zA-Z]+)/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'twitch-channel',
            regex: /https?:\/\/www.twitch.tv\/([^\/\?\&]*)/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'twitch-video',
            regex: /https?:\/\/www.twitch.tv\/(?:[^\/\?\&]*\/v|videos)\/([0-9]*)/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'yandex-music-album',
            regex: /https?:\/\/music.yandex.ru\/album\/([0-9]*)/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'yandex-music-track',
            regex: /https?:\/\/music.yandex.ru\/album\/([0-9]*)\/track\/([0-9]*)/,
            callback: embed_plugin.urlPastedCallback
        },
        {
            type: 'yandex-music-playlist',
            regex: /https?:\/\/music.yandex.ru\/users\/([^\/\?\&]*)\/playlists\/([0-9]*)/,
            callback: embed_plugin.urlPastedCallback
        } ];

    embed_plugin.destroy = function () {

        embed = null;

    };

    return embed_plugin;

}({});