var Backgrid = require('backgrid');
var Backbone = require('backbone');

module.exports = Backgrid.Cell.extend({
    _originalInit : Backgrid.Cell.prototype.initialize,
    initialize    : function(){
        this._originalInit.apply(this, arguments);
        this.cellValue = this._getValue();
        this.listenTo(this.model, 'change', this._refresh);
        if(this._onEdit) {
            this.listenTo(this.model, 'backgrid:edit', function(model, column, cell, editor){
                if(column.get('name') === this.column.get('name')) {
                    this._onEdit(model, column, cell, editor);
                }
            });
        }
    },
    _refresh      : function(){
        this.cellValue = this._getValue();
        this.render();
    },
    _getValue     : function(){
        var cellValue = this.column.get('cellValue');
        if(cellValue) {
            if(cellValue === 'this') {
                return this.model;
            }
        }
        var name = this.column.get('name');
        if(name === 'this') {
            return this.model;
        }
        var value = this.model.get(name);
        if(!value) {
            return undefined;
        }
        if(!value.get && typeof value === 'object') {
            value = new Backbone.Model(value);
        }
        return value;
    }
});