IriSP.Widgets.Mediafragment = function(player, config) {

    IriSP.Widgets.Widget.call(this, player, config);

    this.last_hash_key = "";

    this.last_hash_value = "";

    window.onhashchange = this.functionWrapper("goToHash");

    if (typeof window.addEventListener !== "undefined") {

        window.addEventListener('message', function(_msg) {

            if (_msg.data.type === "hashchange") {

                document.location.hash = _msg.data.hash;

            }

        })

    };

    this.bindPopcorn("pause","setHashToTime");

    this.bindPopcorn("seeked","setHashToTime");

    this.bindPopcorn("IriSP.Mediafragment.setHashToAnnotation","setHashToAnnotation");

    this.blocked = false;

}

IriSP.Widgets.Mediafragment.prototype = new IriSP.Widgets.Widget();

IriSP.Widgets.Mediafragment.prototype.draw = function() {

    this.goToHash();

}

IriSP.Widgets.Mediafragment.prototype.getLastHash = function() {

    var _tab = document.location.hash.replace(/^#/,'').split('&');

    _tab = IriSP._(_tab).filter(function(_el) {

        return _el && !/^(id|t)=/.test(_el);

    });

    if (this.last_hash_key) {

        _tab.push(this.last_hash_key + '=' + this.last_hash_value);

    }

    return '#' + _tab.join('&');

}

IriSP.Widgets.Mediafragment.prototype.goToHash = function() {

    if (document.location.hash !== this.getLastHash()) {

        var _tab = document.location.hash.replace(/^#/,'').split('&');

        for (var _i = 0; _i < _tab.length; _i++) {

            var _subtab = _tab[_i].split("=");

            if (_subtab[0] == "id" || _subtab[0] == "t") {

                this.last_hash_key = _subtab[0];

                this.last_hash_value = _subtab[1];

                if (this.last_hash_key == "id") {

                    var _annotation = this.source.getElement(this.last_hash_value);

                    if (typeof _annotation !== "undefined") {

                        this.player.popcorn.currentTime(_annotation.begin.getSeconds());

                    }

                }

                if (this.last_hash_key == "t") {

                    this.player.popcorn.currentTime(this.last_hash_value);

                }

                break;

            }

        }

    }

}

IriSP.Widgets.Mediafragment.prototype.setHashToAnnotation = function(_annotationId) {

    this.setHash( 'id', this.source.unNamespace(_annotationId) );

}

IriSP.Widgets.Mediafragment.prototype.setHashToTime = function(_time) {

    if (_time !== NaN) {

        this.setHash( 't', this.player.popcorn.currentTime() );

    }

}

IriSP.Widgets.Mediafragment.prototype.setHash = function(_key, _value) {

    if (!this.blocked && (this.last_hash_key !== _key || this.last_hash_value !== _value)) {

        this.last_hash_key = _key;

        this.last_hash_value = _value;

        var _hash = this.getLastHash();

        document.location.hash = _hash;

        if (window.parent !== window) {

            window.parent.postMessage({

                type: "hashchange",

                hash: _hash

        }

        this.block();

    }

}

IriSP.Widgets.Mediafragment.prototype.unblock = function() {

    if (typeof this.blockTimeout !== "undefined") {

        window.clearTimeout(this.blockTimeout);

    }

    this.blockTimeout = undefined;

    this.blocked = false;

}

IriSP.Widgets.Mediafragment.prototype.block = function() {

    if (typeof this.blockTimeout !== "undefined") {

        window.clearTimeout(this.blockTimeout);

    }

    this.blocked = true;

    this.blockTimeout = window.setTimeout(this.functionWrapper("unblock"), 1000);

}