from datetime import date
from sqlalchemy import Date, ForeignKey, Integer, Text
from sqlalchemy.orm import Mapped, mapped_column, relationship
from app.models.base import Base, TimestampMixin


class ActivityLog(TimestampMixin, Base):
    __tablename__ = "activity_logs"

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    child_id: Mapped[int] = mapped_column(ForeignKey("children.id", ondelete="CASCADE"), nullable=False)
    subject_id: Mapped[int | None] = mapped_column(
        ForeignKey("subjects.id", ondelete="SET NULL"), nullable=True
    )
    session_id: Mapped[int | None] = mapped_column(
        ForeignKey("daily_sessions.id", ondelete="SET NULL"), nullable=True
    )
    log_date: Mapped[date] = mapped_column(Date, nullable=False)
    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
    duration_minutes: Mapped[int | None] = mapped_column(Integer, nullable=True)

    child: Mapped["Child"] = relationship("Child", back_populates="activity_logs")  # noqa: F821
    subject: Mapped["Subject | None"] = relationship("Subject", back_populates="activity_logs")  # noqa: F821
    session: Mapped["DailySession | None"] = relationship("DailySession", back_populates="activity_logs")  # noqa: F821