const CronJob = require('cron').CronJob,
    axios = require('axios'),
    jwt = require('jsonwebtoken'),
    crypto = require('crypto'),
    helpers = require('../helpers/helpers'),
    config = require('../config/default'),
    port = config.rtmp_server.http.port;

const job = new CronJob('*/5 * * * * *', function () {
    // Use node-media-server API v1 with a signed token (internal use)
    // Compute secret the same way node-media-server does (sha256 of first user password)
    const jwtConfig = config.rtmp_server.auth && config.rtmp_server.auth.jwt;
    let token = null;
    try {
        if (jwtConfig && jwtConfig.users && jwtConfig.users.length > 0) {
            const secret = crypto.createHash('sha256').update(jwtConfig.users[0].password).digest('hex');
            token = jwt.sign({}, secret, { algorithm: jwtConfig.algorithm || 'HS256' });
        }
    } catch (e) {
        console.log('Failed to generate JWT for node-media-server api:', e.message);
    }

    const apiUrl = 'http://127.0.0.1:' + port + '/api/v1/streams' + (token ? ('?token=' + token) : '');
    axios.get(apiUrl)
        .then(response => {
            let streams = response.data;
            if (typeof (streams['live'] !== undefined)) {
                let live_streams = streams['live'];
                for (let stream in live_streams) {
                    if (!live_streams.hasOwnProperty(stream)) continue;
                    helpers.generateStreamThumbnail(stream);
                }
            }
        })
        .catch(error => {
            console.log(error);
        });
}, null, false);

module.exports = job;