package service;

import dao.DAOFactory;
import dao.StudentDAO;
import model.Student;

/**
 * 学生信息服务类
 */
public class StudentService {
    private final StudentDAO studentDAO = DAOFactory.getStudentDAO();

    /**
     * 根据ID查询学生
     * @param id 学生ID
     * @return 学生信息
     */
    public Student getStudentById(int id) {
        return studentDAO.findById(id);
    }

    /**
     * 学生登录
     * @param studentId 学号
     * @param password 密码
     * @return 登录成功返回学生信息，失败返回null
     */
    public Student login(String studentId, String password) {
        Student student = studentDAO.findByStudentId(studentId);
        System.out.println("Login attempt - StudentID: " + studentId);
        System.out.println("Student found: " + (student != null));
        if (student != null) {
            System.out.println("Stored password: " + student.getPassword());
            System.out.println("Input password: " + password);
            System.out.println("Password match: " + password.equals(student.getPassword()));
        }
        if (student != null && password.equals(student.getPassword())) {
            return student;
        }
        return null;
    }
}