//define([
//], function(){

//==============================================================================
/** @class Model for a saved Galaxy visualization.
 *
 *  @augments Backbone.Model
 *  @constructs
 */
var Visualization = Backbone.Model.extend(
/** @lends Visualization.prototype */{

    ///** logger used to record this.log messages, commonly set to console */
    //// comment this out to suppress log output
    //logger              : console,

    /** default attributes for a model */
    defaults : {
        config : {}
    },

    /** override urlRoot to handle presence/absence of galaxy_config */
    urlRoot : function(){
        var apiUrl = '/api/visualizations';
        return (( window.galaxy_config && galaxy_config.root )?( galaxy_config.root + apiUrl ):( apiUrl ));
    },

    /** Set up the model, determine if accessible, bind listeners
     *  @see Backbone.Model#initialize
     */
    initialize : function( data ){
        //this.log( this + '.initialize', data, this.attributes );

        // munge config sub-object here since bbone won't handle defaults with this
        if( _.isObject( data.config ) && _.isObject( this.defaults.config ) ){
            _.defaults( data.config, this.defaults.config );
        }

        this._setUpListeners();
    },

    /** set up any event listeners
     */
    _setUpListeners : function(){
        //this.on( 'change', function(){
        //    console.info( 'change:', arguments );
        //});
    },

    // ........................................................................ config
    /** override set to properly allow update and trigger change when setting the sub-obj 'config' */
    set: function( key, val ){
        //TODO: validate config is object
        if( key === 'config' ){
            var oldConfig = this.get( 'config' );
            // extend if already exists (is this correct behavior? no way to eliminate keys or reset entirely)
            // clone in order to trigger change (diff. obj ref)
            if( _.isObject( oldConfig ) ){
                val = _.extend( _.clone( oldConfig ), val );
            }
        }
        Backbone.Model.prototype.set.call( this, key, val );
        return this;
    },

    // ........................................................................ misc
    /** String representation */
    toString : function(){
        var idAndTitle = this.get( 'id' ) || '';
        if( this.get( 'title' ) ){
            idAndTitle += ':' + this.get( 'title' );
        }
        return 'Visualization(' + idAndTitle + ')';
    }
});


//==============================================================================
/** @class Backbone collection of visualization models
 *
 *  @borrows LoggableMixin#logger as #logger
 *  @borrows LoggableMixin#log as #log
 *  @constructs
 */
var VisualizationCollection = Backbone.Collection.extend(
/** @lends VisualizationCollection.prototype */{
    model           : Visualization,

    ///** logger used to record this.log messages, commonly set to console */
    //// comment this out to suppress log output
    //logger              : console,

    url : function(){
        return galaxy_config.root + 'api/visualizations';
    },

    /** Set up.
     *  @see Backbone.Collection#initialize
     */
    initialize : function( models, options ){
        options = options || {};
        //this._setUpListeners();
    },

    //_setUpListeners : function(){
    //},

    // ........................................................................ common queries
    // ........................................................................ ajax
    // ........................................................................ misc
    set : function( models, options ){
        // arrrrrrrrrrrrrrrrrg...
        // override to get a correct/smarter merge when incoming data is partial (e.g. stupid backbone)
        //  w/o this partial models from the server will fill in missing data with model defaults
        //  and overwrite existing data on the client
        // see Backbone.Collection.set and _prepareModel
        var collection = this;
        models = _.map( models, function( model ){
            var existing = collection.get( model.id );
            if( !existing ){ return model; }

            // merge the models _BEFORE_ calling the superclass version
            var merged = existing.toJSON();
            _.extend( merged, model );
            return merged;
        });
        // now call superclass when the data is filled
        Backbone.Collection.prototype.set.call( this, models, options );
    },

    /** String representation. */
    toString : function(){
         return ([ 'VisualizationCollection(', [ this.historyId, this.length ].join(), ')' ].join( '' ));
    }
});


//==============================================================================
//return {
//    Visualization           : Visualization,
//    VisualizationCollection : VisualizationCollection
//};});