package ru.mcs.diary.student;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;

import java.util.List;
import java.util.Optional;

@Repository
public interface StudentRepository extends JpaRepository<Student, Long> {

    List<Student> findAllByTeacherIdOrderByLastNameAscFirstNameAsc(Long teacherId);

    Optional<Student> findByIdAndTeacherId(Long id, Long teacherId);

    @Query("SELECT s FROM Student s LEFT JOIN FETCH s.studentParents sp LEFT JOIN FETCH sp.parent WHERE s.id = :id AND s.teacher.id = :teacherId")
    Optional<Student> findByIdWithParents(@Param("id") Long id, @Param("teacherId") Long teacherId);

    long countByTeacherId(Long teacherId);
}