from datetime import datetime, timezone

from sqlalchemy import String, Integer, Float, DateTime, ForeignKey, Text, Boolean
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.core.database import Base


class Recommendation(Base):
    __tablename__ = "recommendations"

    id: Mapped[int] = mapped_column(primary_key=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), index=True)
    playlist_id: Mapped[int | None] = mapped_column(ForeignKey("playlists.id", ondelete="SET NULL"), nullable=True)

    # Recommended track info
    title: Mapped[str] = mapped_column(String(500))
    artist: Mapped[str] = mapped_column(String(500))
    album: Mapped[str | None] = mapped_column(String(500), nullable=True)
    spotify_id: Mapped[str | None] = mapped_column(String(255), nullable=True)
    preview_url: Mapped[str | None] = mapped_column(String(500), nullable=True)
    image_url: Mapped[str | None] = mapped_column(String(500), nullable=True)
    bandcamp_url: Mapped[str | None] = mapped_column(String(500), nullable=True)

    # AI explanation
    reason: Mapped[str] = mapped_column(Text)
    score: Mapped[float | None] = mapped_column(Float, nullable=True)
    query: Mapped[str | None] = mapped_column(Text, nullable=True)

    # User interaction
    saved: Mapped[bool] = mapped_column(Boolean, default=False)
    disliked: Mapped[bool] = mapped_column(Boolean, default=False, server_default="false")
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )

    user: Mapped["User"] = relationship(back_populates="recommendations")


from app.models.user import User  # noqa: E402, F811