from sqlalchemy.orm import Session

from app.domain.models.courses import Course


class CoursesRepository:
    def __init__(self, db: Session):
        self.db = db

    def get_all(self):
        return self.db.query(Course).all()

    def get_by_id(self, course_id: int):
        return self.db.query(Course).filter(Course.id == course_id).first()

    def create(self, course: Course):
        self.db.add(course)
        self.db.commit()
        self.db.refresh(course)
        return course

    def update(self, course: Course):
        self.db.merge(course)
        self.db.commit()
        self.db.refresh(course)
        return course

    def delete(self, course_id: int):
        course = self.db.query(Course).filter(Course.id == course_id).first()
        if course:
            self.db.delete(course)
            self.db.commit()
            return course

        return None