/* widgetsDefinition of an ancestor for the Widget classes */

if (typeof IriSP.Widgets === "undefined") {

    IriSP.Widgets = {};

}

/**

 * @class IriSP.Widget is an "abstract" class. It's mostly used to define some properties common to every widget.

 *

 *  Note that widget constructors are never called directly by the user. Instead, the widgets are instantiated by functions

 *  defined in init.js

 *

 * @constructor

 * @param player - a reference to the player widget

 * @param config - configuration options for the widget

 */

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

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

        /* Probably an abstract call of the class when

         * individual widgets set their prototype */

        return;

    }

    this.__subwidgets = [];

    /* Setting all the configuration options */

    var _type = config.type || "(unknown)",

        _config = IriSP._.defaults({}, config, (player && player.config ? player.config.default_options : {}), this.defaults),

        _this = this;

    IriSP._(_config).forEach(function(_value, _key) {

       _this[_key] = _value;

    });

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

    if (typeof this.width === "undefined") {

        this.width = this.$.width();

    } else {

        this.$.css("width", this.width);

    }

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

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

    }

    /* Setting this.player at the end in case it's been overriden

     * by a configuration option of the same name :-(

     */

    this.player = player || new IriSP.FakeClass(["on","trigger","off","loadWidget","loadMetadata"]);

    /* Adding classes and html attributes */

    this.$.addClass("Ldt-TraceMe Ldt-Widget").attr("widget-type", _type);

    this.l10n = (

        typeof this.messages[IriSP.language] !== "undefined"

        ? this.messages[IriSP.language]

        : (

            IriSP.language.length > 2 && typeof this.messages[IriSP.language.substr(0,2)] !== "undefined"

            ? this.messages[IriSP.language.substr(0,2)]

            : this.messages["en"]

        )

    );

    /* Loading Metadata if required */

    function onsourceloaded() {

        if (_this.media_id) {

                _this.media = this.getElement(_this.media_id);

            } else {

                var _mediaopts = {

                    is_mashup: _this.is_mashup || false

                };

                _this.media = _this.source.getCurrentMedia(_mediaopts);

            }

        _this.player.trigger("widget-loaded");

    }

    if (this.metadata) {

        /* Getting metadata */

        this.source = player.loadMetadata(this.metadata);

        /* Call draw when loaded */

        this.source.onLoad(onsourceloaded);

    } else {

        if (this.source) {

            onsourceloaded();

        }

    }

};

IriSP.Widgets.Widget.prototype.defaults = {};

IriSP.Widgets.Widget.prototype.template = '';

IriSP.Widgets.Widget.prototype.messages = {"en":{}};

IriSP.Widgets.Widget.prototype.toString = function() {

    return "Widget " + this.type;

};

IriSP.Widgets.Widget.prototype.templateToHtml = function(_template) {

    return Mustache.to_html(_template, this);

};

IriSP.Widgets.Widget.prototype.renderTemplate = function() {

    this.$.append(this.templateToHtml(this.template));

};

IriSP.Widgets.Widget.prototype.functionWrapper = function(_name) {

    var _this = this,

        _function = this[_name];

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

        return function() {

            return _function.apply(_this, Array.prototype.slice.call(arguments, 0));

        };

    } else {

        console.log("Error, Unknown function IriSP.Widgets." + this.type + "." + _name);

    }

};

IriSP.Widgets.Widget.prototype.getFunctionOrName = function(_functionOrName) {

    switch (typeof _functionOrName) {

        case "function":

            return _functionOrName;

        case "string":

            return this.functionWrapper(_functionOrName);

        default:

            return undefined;

    }

};

IriSP.Widgets.Widget.prototype.onMdpEvent = function(_eventName, _functionOrName) {

    this.player.on(_eventName, this.getFunctionOrName(_functionOrName));

};

IriSP.Widgets.Widget.prototype.onMediaEvent = function(_eventName, _functionOrName) {

    this.media.on(_eventName, this.getFunctionOrName(_functionOrName));

};

IriSP.Widgets.Widget.prototype.getWidgetAnnotations = function() {

    var result = null;

    if (typeof this.annotation_type === "undefined") {

        result = this.media.getAnnotations();

    } else if (this.annotation_type.elementType === "annotationType") {

        result = this.annotation_type.getAnnotations();

    } else {

        result = this.media.getAnnotationsByTypeTitle(this.annotation_type);

    }

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

        return this.annotation_filter(result);

    } else {

        return result;

    }

};

IriSP.Widgets.Widget.prototype.getWidgetAnnotationsAtTime = function() {

    var _time = this.media.getCurrentTime();

    return this.getWidgetAnnotations().filter(function(_annotation) {

        return _annotation.begin <= _time && _annotation.end > _time;

    });

};

IriSP.Widgets.Widget.prototype.isLoaded = function() {

    var isloaded = !IriSP._(this.__subwidgets).any(function(w) {

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

    });

    return isloaded;

};

IriSP.Widgets.Widget.prototype.insertSubwidget = function(_selector, _widgetoptions, _propname) {

    var _id = _selector.attr("id"),

        _this = this,

        _type = _widgetoptions.type,

        $L = $LAB,

        key = this.__subwidgets.length;

    this.__subwidgets.push(null);

    if (typeof _id == "undefined") {

        _id = IriSP._.uniqueId(this.container + '_sub_widget_' + _widgetoptions.type);

        _selector.attr("id", _id);

    }

    _widgetoptions.container = _id;

    if (typeof IriSP.widgetsRequirements[_type] !== "undefined" && typeof IriSP.widgetsRequirements[_type].requires !== "undefined" ) {

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

            $L.script(IriSP.getLib(IriSP.widgetsRequirements[_type].requires[_j]));

        }

    }

    $L.wait(function() {

        _this.player.loadWidget(_widgetoptions, function(_widget) {

            if (_propname) {

                _this[_propname] = _widget;

            }

            _this.__subwidgets[key] = _widget;

        });

    });

};

/*

 * Position the player to the next/previous annotations based on current player position

 *

 * Parameter: offset: -1 for previous annotation, +1 for next annotation

 */

IriSP.Widgets.Widget.prototype.navigate = function(offset) {

    // offset is normally either -1 (previous slide) or +1 (next slide)

    var _this = this;

    var currentTime = _this.media.getCurrentTime();

    var annotations = _this.source.getAnnotations().sortBy(function(_annotation) {

        return _annotation.begin;

    });

    for (var i = 0; i < annotations.length; i++) {

        if (annotations[i].begin <= currentTime && currentTime < annotations[i].end) {

            // Found a current annotation - clamp i+offset value to [0, length - 1]

            i = Math.min(annotations.length - 1, Math.max(0, i + offset));

            _this.media.setCurrentTime(annotations[i].begin);

            break;

        }

    };

};

/**

 * This method responsible of drawing a widget on screen.

 */

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

    /* implemented by "sub-classes" */

};