const config = require('../config');
const Vimeo = require('vimeo').Vimeo;
const client = new Vimeo(config.vimeo.CLIENT_ID, config.vimeo.CLIENT_SECRET, config.vimeo.ACCESS_TOKEN);

function parseVideo(url) {
    // - Supported YouTube URL formats:
    //   - http://www.youtube.com/watch?v=My2FRPA3Gf8
    //   - http://youtu.be/My2FRPA3Gf8
    //   - https://youtube.googleapis.com/v/My2FRPA3Gf8
    // - Supported Vimeo URL formats:
    //   - http://vimeo.com/25451551
    //   - http://player.vimeo.com/video/25451551
    // - Also supports relative URLs:
    //   - //player.vimeo.com/video/25451551

    var type = undefined;
    url.match(/(http:|https:|)\/\/(player.|www.)?(vimeo\.com|youtu(be\.com|\.be|be\.googleapis\.com))\/(video\/|embed\/|watch\?v=|v\/)?([A-Za-z0-9._%-]*)(\&\S+)?/);

    if (RegExp.$3.indexOf('youtu') > -1) {
        type = 'youtube';
    } else if (RegExp.$3.indexOf('vimeo') > -1) {
        type = 'vimeo';
    }

    return {
        type: type,
        id: RegExp.$6,
        class: type ? 'video' : 'unknown',
    };
}


function getIframeSource(iframeHtml) {
    const groups = iframeHtml.match(/\<iframe.+src\=(?:\"|\')(.+?)(?:\"|\')/);
    return groups[1];
}

function extractVimeoInformation(vimeoResponse) {
    return {
        duration: vimeoResponse.duration,
        name: vimeoResponse.name,
        description: vimeoResponse.description,
        link: vimeoResponse.link,
        type: vimeoResponse.type,
        stats: vimeoResponse.stats,

        download: vimeoResponse.download,
        pictures: vimeoResponse.pictures,
        embed: getIframeSource(vimeoResponse.embed.html)
    }
}


function extractProviderInfo(videoId) {
    return new Promise(function(resolve, reject) {
        client.request({
            method: 'GET',
            path: '/videos/' + videoId
        }, function (error, body, status_code, headers) {
            if (error) {
                console.error(error);
                resolve({})
            } else {
                if (body.status !== 'available') {
                    resolve({})   
                } else {
                    resolve(extractVimeoInformation(body));
                }
            }
        })
    });
}

function determineProviderInfo(url) {
    console.log(url);
    
    if (!url) return {
        provider: undefined,
        code: undefined,
        class: undefined,
    };

    var info = parseVideo(url);
    return {
        provider: info.type,
        code: info.code,
        class: info.class,
    }
}


module.exports = {
    determineProviderInfo,
    extractProviderInfo
}