from sqlalchemy import Column, Integer, Boolean, String, DateTime, ForeignKey
from sqlalchemy.sql import func
from sqlalchemy.orm import relationship

from app.domain.models import Base


class Notification(Base):
    __tablename__ = 'notifications'

    id = Column(Integer, primary_key=True, autoincrement=True)
    text = Column(String, nullable=False)
    datetime_notification = Column(DateTime, nullable=False, default=func.utcnow)
    is_read = Column(Boolean, nullable=False, default=False)

    user_id = Column(Integer, ForeignKey('users.id'), nullable=False)
    type_id = Column(Integer, ForeignKey('notification_types.id'), nullable=False)
    course_id = Column(Integer, ForeignKey('courses.id'))

    user = relationship('User', back_populates='notifications')
    type = relationship('NotificationType', back_populates='notifications')
    course = relationship('Course', back_populates='notifications')