var spawn = require('child_process').spawn,
    stream = require('stream'),

    clone = require('clone'),
    ffmpeg = require('fluent-ffmpeg'),
    headless = require('headless');

module.exports = function (done) {
    headless({
        display: {
            width: 640,
            height: 480,
            depth: 16
        }
    }, function (err, child, server) {
        var env, out;

        if (err) {
            return done(err);
        }

        out = new stream.PassThrough();

        env = clone(process.env);
        env.DISPLAY = ':' + server;

        spawn('mupen64plus', [ '--resolution 320x240', '--fullscreen',__dirname + '/sm64.z64' ], {
            env: env
        });

        ffmpeg()
            .input(':' + server)
            .inputFormat('x11grab')
            .inputFPS(15)
            .size('320x240')
            .videoBitrate(120)
            .format('webm')
            .fps(25)
            .output(out)
            .run();

        done(null, null, out);
    });
};