package nju.seec.helper.service;

import nju.seec.helper.dto.course.ChooseDTO;
import nju.seec.helper.dto.course.CourseDTO;
import nju.seec.helper.dto.user.LoginUser;
import nju.seec.helper.vo.CourseVO;
import nju.seec.helper.vo.UserVO;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;

/**
 * @author cst
 */
public interface CourseService {
    /**
     * 创建课程
     *
     * @param teacher
     * @param courseDTO
     * @return
     */
    CourseVO createCourse(LoginUser teacher, CourseDTO courseDTO);

    /**
     * 修改课程
     *
     * @param user
     * @param courseId
     * @param courseDTO
     * @return
     */
    CourseVO modifyCourse(LoginUser user, Long courseId, CourseDTO courseDTO);

    /**
     * 删除课程（伪删除）
     *
     * @param user
     * @param courseId
     */
    void removeCourse(LoginUser user, Long courseId);

    /**
     * 学生选课
     *
     * @param student
     * @param courseId
     * @param chooseDTO
     */
    void chooseCourse(LoginUser student, Long courseId, ChooseDTO chooseDTO);

    /**
     * 退课
     *
     * @param user
     * @param courseId
     */
    void quitCourse(LoginUser user, Long courseId);

    /**
     * 获取课程
     *
     * @param key
     * @param pageable
     * @return
     */
    Page<CourseVO> getCourses(String key, Pageable pageable);

    /**
     * 教师获取创建课程
     *
     * @param teacher
     * @param key
     * @param pageable
     * @return
     */
    Page<CourseVO> teacherGetCourses(LoginUser teacher, String key, Pageable pageable);

    /**
     * 学生获取已选课程
     *
     * @param student
     * @param key
     * @param pageable
     * @return
     */
    Page<CourseVO> studentGetCourses(LoginUser student, String key, Pageable pageable);

    /**
     * 获取课程选课码
     *
     * @param user
     * @param courseId
     * @return
     */
    String getCourseCode(LoginUser user, Long courseId);

    /**
     * 取得某课程
     *
     * @param courseId
     * @return
     */
    CourseVO getOneCourse(Long courseId);

    /**
     * 获取选课名单
     *
     * @param user
     * @param courseId
     * @param key
     * @param pageable
     * @return
     */
    Page<UserVO> getChooseStudents(LoginUser user, Long courseId, String key, Pageable pageable);
}