/* -*- mode:javascript; coding:utf-8; -*- */

'use strict';

(function (window) {
    var LOOP_COUNT = 4;

    function sample(json) {
        var x = JSON.parse(json);

        this.seq = x.seq || 0;
        this.timestamp = x.timestamp || 0;
        this.url = x.url;
    }

    sample.prototype.gt = function (x) {
        return this.timestamp > x.timestamp || this.timestamp === x.timestamp && this.seq > x.seq;
    };

    sample.prototype.load = function (context) {
        var self = this;

        if (self.url) {
            var request = new XMLHttpRequest();

            request.open('GET', self.url, true);
            request.responseType = 'arraybuffer';

            request.onload = function (v) {
                if (v && v.target && v.target.status == 200) {
                    context.decodeAudioData(request.response, function (buffer) {
                        if (buffer) {
                            self.buffer = buffer;

                            if (self.onload) {
                                self.onload();
                            }
                            console.log('sample.load: finished ', self.url);
                        }
                        else {
                            console.error('sample.load: no decoded data', self);
                        }
                    }, function (e) {
                        console.error('sample.load: decodeAudioData error', e, self);
                    });
                }
            };

            request.onerror = function (e) {
                var s = (e && e.target && e.target.status && e.target.statusText
                         ? (e.target.status + ' ' + e.target.statusText)
                         : 'error');
                console.error('sample.load: ' + s + ' while loading', self);
            };

            request.send();
        }
        else {
            console.error('sample.load: no URL');
        }
    };

    sample.prototype.play = function (context) {
        var self = this;

        if (self.buffer) {
            var delay = self.buffer.duration * LOOP_COUNT
            var source = context.createBufferSource();

            source.buffer = self.buffer;
            source.loop = true;

            source.connect(context.destination);
            source.start(context.currentTime);
            source.stop(context.currentTime + delay);

            window.setTimeout(function () {
                if (self.onended) {
                    self.onended();
                }
            }, delay * 1000);

            // does not work
            //source.onended = function (e) {
            //    console.log(e);
            //};
        }
        else {
            console.error('sample.play: no buffer', self);
        }
    };

    window['Sample'] = sample;
})(window);