import uuid
from datetime import datetime
from sqlalchemy import String, DateTime, Integer, ForeignKey
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship
from ..database import Base


class Track(Base):
    __tablename__ = "tracks"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    title: Mapped[str] = mapped_column(String(255), nullable=False)
    artist: Mapped[str] = mapped_column(String(255), nullable=False)
    duration: Mapped[int] = mapped_column(Integer, nullable=False)  # milliseconds
    s3_key: Mapped[str] = mapped_column(String(500), nullable=False)
    file_size: Mapped[int] = mapped_column(Integer, nullable=False)  # bytes
    uploaded_by: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)

    # Relationships
    uploader = relationship("User", back_populates="uploaded_tracks")
    queue_entries = relationship("RoomQueue", back_populates="track", cascade="all, delete-orphan")


class RoomQueue(Base):
    __tablename__ = "room_queue"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    room_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("rooms.id"), nullable=False)
    track_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("tracks.id"), nullable=False)
    position: Mapped[int] = mapped_column(Integer, nullable=False)
    added_by: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)

    # Relationships
    room = relationship("Room", back_populates="queue")
    track = relationship("Track", back_populates="queue_entries")
    added_by_user = relationship("User")