from datetime import datetime, timezone

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

from app.core.database import Base


class Playlist(Base):
    __tablename__ = "playlists"

    id: Mapped[int] = mapped_column(primary_key=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), index=True)
    name: Mapped[str] = mapped_column(String(500))
    platform_source: Mapped[str] = mapped_column(String(50))  # spotify, manual, etc.
    external_id: Mapped[str | None] = mapped_column(String(255), nullable=True)
    track_count: Mapped[int] = mapped_column(Integer, default=0)
    taste_profile: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    imported_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )

    user: Mapped["User"] = relationship(back_populates="playlists")
    tracks: Mapped[list["Track"]] = relationship(back_populates="playlist", cascade="all, delete-orphan")


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