package controller;

import domain.Student;
import service.StudentService;
import service.impl.StudentServiceImpl;
import utils.MyBeanUtils;

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

@WebServlet(name = "studentInfoServlet", urlPatterns = {"/student"})
public class StudentInfoServlet extends BaseServlet {

    private StudentService studentService = new StudentServiceImpl();

    public void home(HttpServletRequest request, HttpServletResponse response) throws Exception {
        List<Student> studentList = studentService.queryAllStudent();
        System.out.println(studentList);
        if (studentList != null) {
            request.setAttribute("studentList", studentList);
        } else {
            request.setAttribute("msg", "无数据");
        }
        request.getRequestDispatcher("/pages/studentInfo/allInfo.jsp").forward(request, response);

    }

    public void insertInfo(HttpServletRequest request, HttpServletResponse response) throws Exception {
        Student student = new Student();
        Map<String, String[]> map = request.getParameterMap();
        try {
            MyBeanUtils.populate(student, map);
        } catch (Exception e) {
            e.printStackTrace();
        }
        int row = studentService.insertStudentInfo(student);
        if (row == 1) {
            request.setAttribute("stuMsg","添加成功");
        } else {
            request.setAttribute("stuMsg","添加失败,id可能重复");
        }
        request.getRequestDispatcher("/pages/studentInfo/insertInfo.jsp").forward(request, response);
    }

    public void delInfo(HttpServletRequest request, HttpServletResponse response) throws Exception {
        String id=request.getParameter("id");
        int row = studentService.delStudentInfo(id);
        if (row == 1) {
            request.setAttribute("stuMsg","删除成功");
        } else {
            request.setAttribute("stuMsg","删除失败,可能无id");
        }
        request.getRequestDispatcher("/pages/studentInfo/delInfo.jsp").forward(request, response);
    }

    public void findStudentInfoById(HttpServletRequest request, HttpServletResponse response) throws Exception {
        String id=request.getParameter("id");
        Student student = studentService.findStudentInfoById(id);
        if (student!=null) {
            request.setAttribute("student",student);
        } else {
            request.setAttribute("stuMsgError","查询失败,可能无id");
        }
        request.getRequestDispatcher("/pages/studentInfo/updateInfo.jsp").forward(request, response);
    }



    public void updateStudentInfo(HttpServletRequest request, HttpServletResponse response) throws Exception {
        Student student = new Student();
        Map<String, String[]> map = request.getParameterMap();
        try {
            MyBeanUtils.populate(student, map);
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println(student);
        int row = studentService.updateStudentInfo(student);
        if (row == 1) {
            request.setAttribute("stuMsg","修改成功");
        } else {
            request.setAttribute("stuMsg","修改失败,可能修改后的id重复或者不存在");
        }
        request.getRequestDispatcher("/pages/studentInfo/updateInfo.jsp").forward(request, response);
    }
}