package com.kettas.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.MappingDispatchAction;

import com.kettas.biz.ShoppingcartBizImpl;
import com.kettas.entity.Product;
import com.kettas.entity.Shoppingcart;
import com.kettas.exception.BizException;

/*
 * Title:购物车操作相关Action
 * Author:SecondGroup
 * Time:2010.1.15
 * Version:1.0.0
 */
public class ShoppingcartAction extends MappingDispatchAction{
	private ShoppingcartBizImpl cartBiz;

	public ShoppingcartBizImpl getCartBiz() {
		return cartBiz;
	}

	public void setCartBiz(ShoppingcartBizImpl cartBiz) {
		this.cartBiz = cartBiz;
	}


	/*
	 * 添加一个购物项Action
	 */
	public ActionForward addItem(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response){
		String idStr=request.getParameter("id").trim();
		Integer id=Integer.parseInt(idStr);
		String name=request.getParameter("name");
		String priceStr=request.getParameter("price");
		double price=Double.parseDouble(priceStr);
		String description=request.getParameter("description");
		String amountStr=request.getParameter("amount");
		int amount=Integer.parseInt(amountStr);
		String type=request.getParameter("type");
		Product product=new Product(name,description,price,type);
		product.setId(id);
		
		HttpSession session=request.getSession(true);
		
		Shoppingcart cart=(Shoppingcart) session.getAttribute("cart");
		
		if(cart!=null){
			try {
				cartBiz.setCart(cart);
				cartBiz.addItem(product, amount);
				//维护属性
				cart.setItemsCount(cartBiz.getItemsCount());
				cart.setTotalCost(cartBiz.getTotalCost());
				session.setAttribute("cart", cart);
			} catch (Exception e) {
				throw new BizException(e);
			}
		}else{
			Shoppingcart newCart=new Shoppingcart();
			try {
				cartBiz.setCart(newCart);
				cartBiz.addItem(product, amount);
				
				//维护属性
				newCart.setItemsCount(cartBiz.getItemsCount());
				newCart.setTotalCost(cartBiz.getTotalCost());
				session.setAttribute("cart", newCart);
			} catch (Exception e) {
				throw new BizException(e);
			}
		}
		return mapping.findForward("shoppingcart");
	}
	
	
	/*
	 * 移除一个购物项Action
	 */
	public ActionForward removeItem(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response){
		String productIdStr=request.getParameter("product_id");
		Integer productId=Integer.parseInt(productIdStr);
		
		//从session中获取shoppingcart对象
		HttpSession session=request.getSession(true);
		Shoppingcart cart=(Shoppingcart) session.getAttribute("cart");
		
		//初始化ShoppingcartBizImpl对象
		cartBiz.setCart(cart);
		try {
			//调用ShoppingcartBizImpl删除购物项方法
			cartBiz.deleteItemByProduct(productId);
			
			//维护属性
			cart.setItemsCount(cartBiz.getItemsCount());
			cart.setTotalCost(cartBiz.getTotalCost());
		} catch (Exception e) {
			throw new BizException(e);
		}
		if(cart.getItemsCount()==0){
			session.removeAttribute("cart");
		}else{
			session.setAttribute("cart", cart);
		}
		return mapping.findForward("shoppingcart");
	}
	
	
	/*
	 * 修改购买商品数量
	 */
	public ActionForward modifyAmount(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response){
		String productId[]=request.getParameterValues("productId");
		String newAmount[]=request.getParameterValues("newAmount");
		
		
		HttpSession session=request.getSession(true);
		Shoppingcart cart=(Shoppingcart) session.getAttribute("cart");
		//初始化ShoppingcartBizImpl对象
		cartBiz.setCart(cart);
		
		for(int i=0;i<productId.length;i++){
			try {
				cartBiz.modifyAmountByProduct(Integer.parseInt(productId[i]), Integer.parseInt(newAmount[i]));
				//维护属性
				cart.setItemsCount(cartBiz.getItemsCount());
				cart.setTotalCost(cartBiz.getTotalCost());
			} catch (NumberFormatException e) {
				//当出现数字格式错误的时候应该封装成业务异常抛出
				throw new BizException(e);
			} catch (Exception e) {
				throw new BizException(e);
			}
		}
		session.setAttribute("cart", cart);
		return mapping.findForward("shoppingcart");
	}
	
	
	/*
	 * 清空购物车
	 */
	public ActionForward clearShoppingcart(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response){
		HttpSession session=request.getSession(true);
		Shoppingcart cart=(Shoppingcart) session.getAttribute("cart");
		cartBiz.setCart(cart);
		
		System.out.println("-------------------------FuckingData------------------------------");
		if(cart!=null){
			try {
				cartBiz.clearCart();
			} catch (Exception e) {
				throw new BizException(e);
			}
		}
		
		session.removeAttribute("cart");
		return mapping.findForward("shoppingcart");
	}
}