import uuid
from datetime import datetime, timezone
from typing import Optional, TYPE_CHECKING
from sqlalchemy import String, DateTime, Integer, CheckConstraint, UniqueConstraint, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.dialects.postgresql import UUID
from app.core.database import Base

if TYPE_CHECKING:
    from app.models.user import User
    from app.models.session import Session
    from app.models.tree import Tree


class SessionRating(Base):
    __tablename__ = "session_ratings"
    __table_args__ = (
        CheckConstraint("rating >= 1 AND rating <= 5", name="ck_session_ratings_rating_range"),
        UniqueConstraint("session_id", name="uq_session_ratings_session_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    session_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("sessions.id", ondelete="CASCADE"), nullable=False
    )
    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False
    )
    tree_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("trees.id", ondelete="CASCADE"), nullable=False
    )
    account_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("accounts.id", ondelete="CASCADE"), nullable=False
    )
    rating: Mapped[int] = mapped_column(Integer, nullable=False)
    comment: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False
    )

    # Relationships
    session: Mapped["Session"] = relationship("Session", foreign_keys=[session_id])
    user: Mapped["User"] = relationship("User", foreign_keys=[user_id])
    tree: Mapped["Tree"] = relationship("Tree", foreign_keys=[tree_id])