package example.controller;

import example.model.Computer;
import example.service.ICartService;
import example.service.impl.CartServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@WebServlet("/cart")
public class CartServlet extends HttpServlet {

    ICartService cartService = new CartServiceImpl();

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String action = req.getParameter("action");
        switch (action){
            case "list":
                try {
                    toCart(req, resp);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
                break;
            case "add":
                String id = req.getParameter("id");
                req.getSession().setAttribute("cart",id);
                resp.sendRedirect("/cart");
                break;
            case "remove":
                String removeId = req.getParameter("id");
                req.getSession().removeAttribute(removeId);
                resp.sendRedirect("/cart");
                break;
            default:
                req.getRequestDispatcher("/WEB-INF/jsp/cart.jsp").forward(req,resp);
                break;
        }
    }

    private void toCart(HttpServletRequest req, HttpServletResponse resp) throws Exception {
        List<Computer> computers = cartService.myCart(16);
        req.setAttribute("computers",computers);
        req.getRequestDispatcher("cart.jsp").forward(req,resp);
    }
}