package servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import bean.OrderItem;
import bean.Product;
import dao.ProductDAO;

public class OrderItemAddServlet extends HttpServlet{
	@Override
	protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		
		int num = Integer.parseInt(request.getParameter("num"));
		int pid = Integer.parseInt(request.getParameter("pid"));
		
		Product p = new ProductDAO().getProduct(pid);
		
		OrderItem oi = new OrderItem();
		
		oi.setNum(num);
		oi.setProduct(p);
		
		List<OrderItem> ois = (List<OrderItem>) request.getSession().getAttribute("ois");
		
		if(null == ois) {
			ois = new ArrayList<OrderItem>();
			request.getSession().setAttribute("ois", ois);
		}
		
		
		  boolean found = false; for(OrderItem orderItem : ois) {
		  if(orderItem.getProduct().getId() == oi.getProduct().getId()) {
		  orderItem.setNum(orderItem.getNum()+oi.getNum()); found = true; break; } }
		 
		
		if(!found)
		
		ois.add(oi);
		
		response.sendRedirect("listOrderItem");
	}

}