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


class Room(Base):
    __tablename__ = "rooms"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    name: Mapped[str] = mapped_column(String(100), nullable=False)
    owner_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
    current_track_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("tracks.id"), nullable=True)
    playback_position: Mapped[int] = mapped_column(Integer, default=0)  # milliseconds
    playback_started_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)  # when playback started
    is_playing: Mapped[bool] = mapped_column(Boolean, default=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)

    # Relationships
    owner = relationship("User", back_populates="owned_rooms")
    current_track = relationship("Track", foreign_keys=[current_track_id])
    participants = relationship("RoomParticipant", back_populates="room", cascade="all, delete-orphan")
    queue = relationship("RoomQueue", back_populates="room", cascade="all, delete-orphan", order_by="RoomQueue.position")
    messages = relationship("Message", back_populates="room", cascade="all, delete-orphan")


class RoomParticipant(Base):
    __tablename__ = "room_participants"

    room_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("rooms.id"), primary_key=True)
    user_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), primary_key=True)
    joined_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)

    # Relationships
    room = relationship("Room", back_populates="participants")
    user = relationship("User", back_populates="room_participations")