/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.    
 */
package amazon.cart;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.osoa.sca.annotations.Service;

import com.cart.amazon.AmazonFactory;
import com.cart.amazon.Cart;
import com.cart.amazon.CartAdd;
import com.cart.amazon.CartAddRequest;
import com.cart.amazon.CartAddResponse;
import com.cart.amazon.CartClear;
import com.cart.amazon.CartClearResponse;
import com.cart.amazon.CartCreate;
import com.cart.amazon.CartCreateResponse;
import com.cart.amazon.CartGet;
import com.cart.amazon.CartGetResponse;
import com.cart.amazon.CartItem;
import com.cart.amazon.CartItems;
import com.cart.amazon.Item1;
import com.cart.amazon.Items1;

@Service(AmazonCart.class)
public class AmazonCartImpl {

    protected Map<String, Cart> cartsHash = new HashMap<String, Cart>();

    public CartCreateResponse CartCreate(CartCreate cartCreate) {

        System.out.println("CartServiceID: " + this.toString());
        System.out.println("Entering cartCreate...");
        String userId = cartCreate.getAWSAccessKeyId();

        Cart cart = getCart(userId);
        if (cart != null) {
            System.out.println("User " + cartCreate.getAWSAccessKeyId()
                + " has already created a cart with ID: "
                + cart.getCartId());
            return null;
        }
        cart = new Cart();
        cart.setCartItems(new CartItems());
        addCart(userId, cart);

        CartCreateResponse response = AmazonFactory.INSTANCE.createCartCreateResponse();
        System.out.println("Exiting cartCreate...");
        return response;

    }

    public CartAddResponse CartAdd(CartAdd cartAdd) {

        String userId = cartAdd.getAWSAccessKeyId();

        Cart cart = getCart(userId);
        if (cart == null) {
            System.out.println("User has not associated Cart yet...");
            return null;
        }

        List cartAddRequestList = cartAdd.getRequest();
        CartAddRequest car = (CartAddRequest)cartAddRequestList.get(0);
        Items1 carItems = car.getItems();
        List itemList = carItems.getItem();
        Item1 item = (Item1)itemList.get(0); //Take only the first one, no iteration for now
        System.out.println("item.getASIN: " + item.getASIN());
        System.out.println("item.getQuantity(): " + item.getQuantity());
        CartItems cartItems = cart.getCartItems();
        List<CartItem> cartItemList = cartItems.getCartItem();
        cart.setCartItems(cartItems);
        return null;
    }

    public CartClearResponse CartClear(CartClear cartClear) {
        String userId = cartClear.getAWSAccessKeyId();

        Cart cart = getCart(userId);
        if (cart == null) {
            System.out.println("User has not associated Cart yet...");
            return null;
        }

        cart.setCartItems(new CartItems());
        return null;
    }

    public CartGetResponse CartGet(CartGet cartGet) {
        return null;
    }

    private Cart getCart(String userId) {
        Cart cart = null;
        cart = this.cartsHash.get(userId);
        return cart;
    }

    private void addCart(String userId, Cart cart) {
        this.cartsHash.put(userId, cart);
    }
}