from sqlalchemy import Column, Integer, VARCHAR, String, ForeignKey
from sqlalchemy.orm import relationship

from app.infrastructure.database.models import Base


class Course(Base):
    __tablename__ = 'courses'

    id = Column(Integer, primary_key=True, autoincrement=True)
    title = Column(VARCHAR(200), nullable=False)
    description = Column(String, nullable=False)

    category_id = Column(Integer, ForeignKey('categories.id'), nullable=False)
    owner_user_id = Column(Integer, ForeignKey('users.id'), nullable=False)

    category = relationship('Category', back_populates='courses')
    owner_user = relationship('User', back_populates='owned_courses')

    students = relationship('CourseStudent', back_populates='course')
    notifications = relationship('Notification', back_populates='course')

    lessons = relationship('Lesson', back_populates='course')