package manageuser.controllers;

import java.io.IOException;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;

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

import manageuser.properties.ConfigProperties;
import manageuser.validates.ValidateUser;

/**
 * Servlet implementation class LoginController
 */
public class LoginController extends HttpServlet {
	private static final long serialVersionUID = 1L;
	private static final String USERNAME_PAR = "loginId";
	private static final String PASSWORD_PAR = "password";

	/**
	 * @see HttpServlet#HttpServlet()
	 */
	public LoginController() {
		super();
		// TODO Auto-generated constructor stub
	}

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.sendRedirect("ADM001");
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		// lấy thông tin từ form
		String username = request.getParameter(USERNAME_PAR);
		String password = request.getParameter(PASSWORD_PAR);
		// khởi tạo đối tượng validate
		ValidateUser validate = new ValidateUser();
		// Lấy các thông báo lỗi
		ArrayList<String> listMess;
		try {
			listMess = validate.validateLoginData(username, password);
			if (listMess.size() == 0) {
				HttpSession session = request.getSession();
				session.setAttribute("username", username);
				response.sendRedirect("ListUserController");
			} else {// Nếu có lỗi quay lại màn hình login kèm theo thông báo lỗi
				request.setAttribute("listMess", listMess);
				request.getRequestDispatcher("ADM001").forward(request, response);
			}
		} catch (NoSuchAlgorithmException e) {
			// chuyển hướng sang màn hình thông báo lối
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// chuyển hướng sang màn hình thông báo lỗi
		}
		// Nếu không có lỗi

	}

}