package web.servlet.student;

import domain.Admin;
import domain.SelectCourse;
import domain.Student;
import domain.Teacher;
import service.StudentService;
import service.impl.StudentServiceImpl;

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 javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.List;

@WebServlet("/studentSelectCourseListServlet")
public class StudentSelectCourseListServlet extends HttpServlet {
    // 处理POST请求
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        // 设置请求编码为utf-8
        request.setCharacterEncoding("utf-8");
        // 获取当前会话
        HttpSession session = request.getSession();
        // 从会话中获取学生对象
        Student student= (Student)session.getAttribute("student");
        // 从会话中获取管理员对象
        Admin admin =(Admin)session.getAttribute("admin");

        //调用StudentService完成查询-
        StudentService studentService = new StudentServiceImpl();
        if (student != null && admin == null) {
            List<SelectCourse> selectcourses = studentService.findAllSelectCourse(student.getS_id());
            //将list存入request域-
            request.setAttribute("selectcourses",selectcourses);
            //转发到list.jsp-
            // 如果学生不为空，则跳转到学生选课列表页面
            request.getRequestDispatcher("/WEB-INF/student/studentSelectCourseList.jsp").forward(request,response);
        } else if (admin != null && student == null) {
            // 如果管理员不为空，学生为空，则查询所有学生的选课列表，并跳转到管理员查看所有学生选课列表页面
            List<SelectCourse> selectcourses = studentService.findSelectCourseAllStudent();
            request.setAttribute("selectcourses", selectcourses);
            request.getRequestDispatcher("/WEB-INF/admin/allStudentSelectCourseList.jsp").forward(request, response);
        } else {
            // 否则，跳转到错误页面
            request.getRequestDispatcher("error.jsp").forward(request, response);
        }


    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request,response);
    }
}
//public class StudentSelectCourseListServlet extends HttpServlet {
//    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//
//        request.setCharacterEncoding("utf-8");
//        HttpSession session = request.getSession();
//        Student student= (Student)session.getAttribute("student");
//        Admin admin =(Admin)session.getAttribute("admin");
//
//        //调用StudentService完成查询-
//        StudentService studentService = new StudentServiceImpl();
//        if (student != null && admin == null) {
//            List<SelectCourse> selectcourses = studentService.findAllSelectCourse(student.getS_id());
//            //将list存入request域-
//            request.setAttribute("selectcourses",selectcourses);
//            //转发到list.jsp-
//            request.getRequestDispatcher("/WEB-INF/student/studentSelectCourseList.jsp").forward(request,response);
//        } else if (admin != null && student == null) {
//            List<SelectCourse> selectcourses = studentService.findSelectCourseAllStudent();
//            request.setAttribute("selectcourses", selectcourses);
//            request.getRequestDispatcher("/WEB-INF/admin/allStudentSelectCourseList.jsp").forward(request, response);
//        } else {
//            request.getRequestDispatcher("error.jsp").forward(request, response);
//        }
//
//
//    }
//
//    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//        this.doPost(request,response);
//    }
//}