/**
 * 购物车模型，目前服务有多种类型，所以通过增加一个购物车对象来缓存用户所选的服务
 */
define(['base', '$', 'native', 'product'], function(base, $, native, product) {
	var Cart = function() {
		if (typeof Cart.instance === 'object') {
			return Cart.instance;
		}
		Cart.instance = this;
		this.storagePrefix = 'cart_';
		this.products = this.getCache('products', null, {
			1: {
				productID: '',
				price: '',
				couponName: '',
				couponId: '',
				couponVal: '',
				couponList: []
			},
			2: {
				productID: '',
				price: '',
				couponName: '',
				couponId: '',
				couponVal: '',
				couponList: []
			},
			3: {
				productID: '',
				price: '',
				couponName: '',
				couponId: '',
				couponVal: '',
				couponList: []
			},
			4: { // 洁牙
				productID: '',
				price: '',
				couponName: '',
				couponId: '',
				couponVal: '',
				couponList: []
			},
			5: { // spa
				productID: '',
				price: '',
				couponName: '',
				couponId: '',
				couponVal: '',
				couponList: []
			},
      6: { // 训犬
		  productID: '',
		  price: '',
		  couponName: '',
		  couponId: '',
		  couponVal: '',
		  couponList: []
			},
      7: { // 断尾
		  productID: '',
		  price: '',
		  couponName: '',
		  couponId: '',
		  couponVal: '',
		  couponList: []
			},
      8: { // 碳酸浴
		  productID: '',
		  price: '',
		  couponName: '',
		  couponId: '',
		  couponVal: '',
		  couponList: []
			},
      9: {
		  productID: '',
		  price: '',
		  couponName: '',
		  couponId: '',
		  couponVal: '',
		  couponList: []
			}
		});
		this.petInfo = this.getCache('petInfo', null, {
			petID: '',
			productID: '',
			petName: '',
			petWeight: '',
			petPrice: ''
		});
	};

	Cart.prototype = new base();

	Cart.prototype.precheck = function(type, callback) {
		var productID = this.products[type]['productID'];
		var productParam = [{product_id: productID, count: 1}];

		api.precheck({
			products: JSON.stringify(productParam)
		}, function(res) {
			if (typeof(callback) == 'function') {
				callback(res);
			}
		})
	};

	return new Cart();
})