// Inspired by base2 and Prototype
(function(){
  var initializing = false, fnTest = /xyz/.test(function(){xyz;}) ? /\b_super\b/ : /.*/;

  // The base Class implementation (does nothing)
  this.Class = function(){};
  
  // Create a new Class that inherits from this class
  Class.extend = function(prop) {
    var _super = this.prototype;
    
    // Instantiate a base class (but only create the instance,
    // don't run the init constructor)
    initializing = true;
    var prototype = new this();
    initializing = false;
    
    // Copy the properties over onto the new prototype
    for (var name in prop) {
      // Check if we're overwriting an existing function
      prototype[name] = typeof prop[name] == "function" && 
        typeof _super[name] == "function" && fnTest.test(prop[name]) ?
        (function(name, fn){
          return function() {
            var tmp = this._super;
            
            // Add a new ._super() method that is the same method
            // but on the super-class
            this._super = _super[name];
            
            // The method only need to be bound temporarily, so we
            // remove it when we're done executing
            var ret = fn.apply(this, arguments);        
            this._super = tmp;
            
            return ret;
          };
        })(name, prop[name]) :
        prop[name];
    }
    
    // The dummy class constructor
    function Class() {
      // All construction is actually done in the init method
      if ( !initializing && this.init )
        this.init.apply(this, arguments);
    }
    
    // Populate our constructed prototype object
    Class.prototype = prototype;
    
    // Enforce the constructor to be what we expect
    Class.constructor = Class;

    // And make this class extendable
    Class.extend = arguments.callee;
    
    return Class;
  };
})();

var Photo = Class.extend({
  init: function(photoinfo){
    this.title = "";
    this.tags = photoinfo.tags;
    this.images = photoinfo.images;
    /*
    for (var n=0; n < photoinfo.images.length; n++) {
      this.images[n] = photoinfo.images[n];
    }
    */
    // sort by size
    this.images.sort(function(a, b) {
      function area(dimension) {
        var widthheight = dimension.split('x', 2)
        return widthheight[0] * widthheight[1];
      }
      var a_area = area(a.dimensions);
      var b_area = area(b.dimensions);
      return a_area < b_area ? -1 : a_area > b_area ? 1 : 0;
    });
  },
  title: function(){
    return this.title;
  },
  tags: function(){
    return this.tags;
  },
  images: function(){
    return this.images;
  },
  image: function(style) {
    for (var x = 0; x < this.images.length; x++) {
      if (this.images[x].style == style) {
        return this.images[x];
      }
    }
  },
  styles: function(){
    var styles = [];
    for (var x = 0; x < this.images.length; x++) {
      styles.push(this.images[x].style);
    }
    return styles;
  }
});

var Product = Class.extend({
  init: function(rawdata){
    this.rawdata = rawdata;
    this.photos = [];
    for (var i=0; i < this.rawdata.images.length; i++) {
      this.photos[i] = new Photo(this.rawdata.images[i]);
    }
  },
  name: function(){
    return this.rawdata.name;
  },
  sku: function(){
    return this.rawdata.sku;
  },
  description: function(){
    return this.rawdata.description;
  },
  photos: function() {
    return this.photos;
  }
});