package controller;

import domain.User;
import org.apache.commons.beanutils.BeanUtils;
import service.UserService;
import service.impl.UserServiceImpl;

import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.List;
import java.util.Map;

@WebServlet(name = "userServlet", urlPatterns = {"/user"})
public class UserServlet extends BaseServlet {

    private UserService userService = new UserServiceImpl();


    public void login(HttpServletRequest request, HttpServletResponse response) throws Exception {
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        User user = userService.login(username, password);
        if (user != null) {
            request.getSession().setAttribute("loginUser", user);
            response.sendRedirect("/student?method=home");
        } else {
            request.setAttribute("msg", "用户名或者密码错误");
            request.getRequestDispatcher("/user/login.jsp").forward(request, response);
        }
    }

    public void register(HttpServletRequest request, HttpServletResponse response) throws Exception {
        User user = new User();
        Map<String, String[]> map = request.getParameterMap();
        try {
            BeanUtils.populate(user, map);
        } catch (Exception e) {
            e.printStackTrace();
        }
        int row = userService.register(user);
        if (row > 0) {
            request.getRequestDispatcher("/user/login.jsp").forward(request, response);
        } else {
            request.setAttribute("msg", "该用户名已注册!");
            request.getRequestDispatcher("/user/register.jsp").forward(request, response);
        }
    }

    public void pwdManage(HttpServletRequest request, HttpServletResponse response) throws Exception {
        HttpSession session = request.getSession();
        User user = (User) session.getAttribute("loginUser");
        Integer id = user.getId();
        String newPwd = request.getParameter("password");
        int row = userService.pwdManage(id, newPwd);
        if (row == 1) {
            request.getRequestDispatcher("/user/login.jsp").forward(request, response);
        } else {
            request.setAttribute("msg", "修改失败!");
            request.getRequestDispatcher("/pages/systemManage/pwdManage.jsp").forward(request, response);
        }
    }

    public void userManage(HttpServletRequest request, HttpServletResponse response) throws Exception {
        HttpSession session = request.getSession();
        User user = (User) session.getAttribute("loginUser");
        if (user != null) {
            request.setAttribute("userManageMsg", user);
        } else {
            request.setAttribute("userManageMsg", "获取用户信息失败!");
        }
        request.getRequestDispatcher("/pages/systemManage/userManage.jsp").forward(request,response);
    }
}