/* widgets-container/metadataplayer.js - initialization and configuration of the widgets

*/

/* The Metadataplayer Object, single point of entry, replaces IriSP.init_player */

(function(ns) {

var formerJQuery, formerUnderscore, former$;

var Metadataplayer = ns.Metadataplayer = function(config) {

    ns.log("IriSP.Metadataplayer constructor");

    for (var key in ns.guiDefaults) {

        if (ns.guiDefaults.hasOwnProperty(key) && !config.hasOwnProperty(key)) {

            config[key] = ns.guiDefaults[key]

        }

    }

    var _container = document.getElementById(config.container);

    _container.innerHTML = '<h3 class="Ldt-Loader">Loading... Chargement...</h3>';

    this.sourceManager = new ns.Model.Directory();

    this.config = config;

    this.__events = {};

    this.loadLibs();

};

Metadataplayer.prototype.toString = function() {

    return 'Metadataplayer in #' + this.config.container;

};

Metadataplayer.prototype.on = function(_event, _callback) {

    if (typeof this.__events[_event] === "undefined") {

        this.__events[_event] = [];

    }

    this.__events[_event].push(_callback);

};

Metadataplayer.prototype.trigger = function(_event, _data) {

    var _element = this;

    ns._(this.__events[_event]).each(function(_callback) {

        _callback.call(_element, _data);

    });

};

Metadataplayer.prototype.loadLibs = function() {

    ns.log("IriSP.Metadataplayer.prototype.loadLibs");

    var $L = $LAB

        .queueScript(ns.getLib("Mustache"));

    formerJQuery = !!window.jQuery;

    former$ = !!window.$;

    formerUnderscore = !!window._;

    if (typeof ns.jQuery === "undefined") {

        $L.queueScript(ns.getLib("jQuery"));

    }

    if (typeof ns._ === "undefined") {

        $L.queueScript(ns.getLib("underscore"));

    }

    if (typeof window.JSON == "undefined") {

        $L.queueScript(ns.getLib("json"));

    }

    $L.queueWait().queueScript(ns.getLib("jQueryUI")).queueWait();

    /* widget specific requirements */

    for(var _i = 0; _i < this.config.widgets.length; _i++) {

        var _t = this.config.widgets[_i].type;

        if (typeof ns.widgetsRequirements[_t] !== "undefined" && typeof ns.widgetsRequirements[_t].requires !== "undefined" ) {

            for (var _j = 0; _j < ns.widgetsRequirements[_t].requires.length; _j++) {

                $L.queueScript(ns.getLib(ns.widgetsRequirements[_t].requires[_j]));

            }

        }

    }

    var _this = this;

    $L.queueWait(function() {

        _this.onLibsLoaded();

    });

    $L.runQueue();

};

Metadataplayer.prototype.onLibsLoaded = function() {

    ns.log("IriSP.Metadataplayer.prototype.onLibsLoaded");

    if (typeof ns.jQuery === "undefined" && typeof window.jQuery !== "undefined") {

        ns.jQuery = window.jQuery;

        if (former$ || formerJQuery) {

            window.jQuery.noConflict(formerJQuery);

        }

    }

    if (typeof ns._ === "undefined" && typeof window._ !== "undefined") {

        ns._ = window._;

        if (formerUnderscore) {

            _.noConflict();

        }

    }

    ns.loadCss(ns.getLib("cssjQueryUI"));

    ns.loadCss(this.config.css);

    this.$ = ns.jQuery('#' + this.config.container);

    this.$.css({

        "width": this.config.width,

        "clear": "both"

    });

    if (typeof this.config.height !== "undefined") {

        this.$.css("height", this.config.height);

    }

    this.widgets = [];

    var _this = this;

    ns._(this.config.widgets).each(function(widgetconf, key) {

        _this.widgets.push(null);

        _this.loadWidget(widgetconf, function(widget) {

            _this.widgets[key] = widget;

            if (widget.isLoaded()) {

                _this.trigger("widget-loaded");

            }

        });

    });

    this.$.find('.Ldt-Loader').detach();

    this.widgetsLoaded = false;

    this.on("widget-loaded", function() {

        if (_this.widgetsLoaded) {

            return;

        }

        var isloaded = !ns._(_this.widgets).any(function(w) {

            return !(w && w.isLoaded());

        });

        if (isloaded) {

            _this.widgetsLoaded = true;

            _this.trigger("widgets-loaded");

        }

    });

};

Metadataplayer.prototype.loadLocalAnnotations = function(localsourceidentifier) {

    if (this.localSource === undefined)

        this.localSource = this.sourceManager.newLocalSource({serializer: IriSP.serializers['ldt_localstorage']});

    // Load current local annotations

    if (localsourceidentifier) {

        // Allow to override localsourceidentifier when necessary (usually at init time)

        this.localSource.identifier = localsourceidentifier;

    }

    this.localSource.deSerialize(window.localStorage[this.localSource.identifier] || "[]");

    return this.localSource;

};

Metadataplayer.prototype.saveLocalAnnotations = function() {

    // Save annotations back to localstorage

    window.localStorage[this.localSource.identifier] = this.localSource.serialize();

    // Merge modifications into widget source

    // this.source.merge(this.localSource);

};

Metadataplayer.prototype.addLocalAnnotation = function(a) {

    this.loadLocalAnnotations();

    this.localSource.getAnnotations().push(a);

    this.saveLocalAnnotations();

};

Metadataplayer.prototype.deleteLocalAnnotation = function(ident) {

    this.localSource.getAnnotations().removeId(ident, true);

    this.saveLocalAnnotations();

};

Metadataplayer.prototype.getLocalAnnotation = function (ident) {

    this.loadLocalAnnotations();

    // We cannot use .getElement since it fetches

    // elements from the global Directory

    return IriSP._.first(IriSP._.filter(this.localSource.getAnnotations(), function (a) { return a.id == ident; }));

};

Metadataplayer.prototype.loadMetadata = function(_metadataInfo) {

    if (_metadataInfo.elementType === "source") {

        return _metadataInfo;

    }

    if (typeof _metadataInfo.serializer === "undefined" && typeof _metadataInfo.format !== "undefined") {

        _metadataInfo.serializer = ns.serializers[_metadataInfo.format];

    }

    if (typeof _metadataInfo.url !== "undefined" && typeof _metadataInfo.serializer !== "undefined") {

        return this.sourceManager.remoteSource(_metadataInfo);

    } else {

        return this.sourceManager.newLocalSource(_metadataInfo);

    }

};

Metadataplayer.prototype.loadWidget = function(_widgetConfig, _callback) {

    /* Creating containers if needed */

    if (typeof _widgetConfig.container === "undefined") {

        var _divs = this.layoutDivs(_widgetConfig.type);

        _widgetConfig.container = _divs[0];

    }

    var _this = this;

    if (typeof ns.Widgets[_widgetConfig.type] !== "undefined") {

        ns._.defer(function() {

            _callback(new ns.Widgets[_widgetConfig.type](_this, _widgetConfig));

        });

    } else {

        /* Loading Widget CSS */

        if (typeof ns.widgetsRequirements[_widgetConfig.type] === "undefined" || typeof ns.widgetsRequirements[_widgetConfig.type].noCss === "undefined" || !ns.widgetsRequirements[_widgetConfig.type].noCss) {

            ns.loadCss(ns.widgetsDir + '/' + _widgetConfig.type + '.css');

        }

        /* Loading Widget JS    */

        $LAB.script(ns.widgetsDir + '/' + _widgetConfig.type + '.js').wait(function() {

            _callback(new ns.Widgets[_widgetConfig.type](_this, _widgetConfig));

        });

    }

};

/** create a subdiv with an unique id, and a spacer div as well.

    @param widgetName the name of the widget.

    @return an array of the form [createdivId, spacerdivId].

*/

Metadataplayer.prototype.layoutDivs = function(_name, _height) {

    if (typeof(_name) === "undefined") {

       _name = "";

    }

    var newDiv = ns._.uniqueId(this.config.container + "_widget_" + _name + "_"),

        spacerDiv = ns._.uniqueId("LdtPlayer_spacer_"),

        divHtml = ns.jQuery('<div>')

            .attr("id",newDiv)

            .css({

                width: this.config.width + "px",

                position: "relative",

                clear: "both"

            }),

        spacerHtml = ns.jQuery('<div>')

            .attr("id",spacerDiv)

            .css({

                width: this.config.width + "px",

                height: this.config.spacer_div_height + "px",

                position: "relative",

                clear: "both"

            });

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

        divHtml.css("height", _height);

    }

    this.$.append(divHtml);

    this.$.append(spacerHtml);

    return [newDiv, spacerDiv];

};

})(IriSP);

/* End of widgets-container/metadataplayer.js */