package org.itfuture.www.action;

import java.util.Enumeration;

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

import org.itfuture.www.po.Signon;
import org.itfuture.www.service.impl.CarImpl;
//這是一個處理購物車所有事務的action
public class CarAction extends BaseAction {
	//以下的全局屬性變量
	private String itemid;

	private Integer quantity = 1;

	public CarAction() {

	}

	//處理購物商品的方法，此方法用于處理商品信息（購物車信息）
	
	public String execute() throws Exception {
		HttpSession session = this.getSession();
		CarImpl car = null;
		//如果購物車中已經有該物品，則直接修改數量
		if (session.getAttribute("car") != null) {
		    car = (CarImpl) session.getAttribute("car");
			car.addItem(itemid, quantity);
		} else {
			//如果購物車中沒有該物品，則生成一個實例，用session存起來
			car = new CarImpl();
			car.addItem(itemid, quantity);
			session.setAttribute("car", car);
		}
		return this.SUCCESS;
	}
//該方法用于刪除購物車中的商品
	public String delete() {
		HttpSession session = this.getSession();
		CarImpl car = (CarImpl)session.getAttribute("car");
		car.getMap().remove(itemid);
		return this.SUCCESS;
	}
	//該方法用于修改購物車中商品的數量
    public String update(){
    	HttpServletRequest request = this.getRequest();
    	Enumeration en = request.getParameterNames();
    	CarImpl car = (CarImpl)request.getSession().getAttribute("car");
    	double aa = car.totalPrice();
    	while(en.hasMoreElements()){
    		String name = en.nextElement().toString();
    		String value = request.getParameter(name);
    		car.update(name, Integer.parseInt(value));
    	}
    	return this.SUCCESS;
    }
    //校驗用戶所要買的商品，即校驗購物車
    public String checkOrder(){
      HttpSession session = this.getSession();
      //得到用戶信息
      Signon signon = (Signon)session.getAttribute("sigon");
      //如果用戶信息為空，說明還沒有登錄，
      if(signon!=null){
    	  return this.SUCCESS;
      }
      //請用戶登錄
    	return this.INPUT;
    }
    //以下為全局屬性的setter getter方法
	public String getItemid() {
		return itemid;
	}

	public void setItemid(String itemid) {
		this.itemid = itemid;
	}

	public Integer getQuantity() {
		return quantity;
	}

	public void setQuantity(Integer quantity) {
		this.quantity = quantity;
	}

}