import uuid
from datetime import datetime
from sqlalchemy import String, Float, Boolean, DateTime, Text, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.dialects.sqlite import JSON
from ..database import Base


class PlaybackSession(Base):
    __tablename__ = "playback_sessions"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    user_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    library_item_id: Mapped[str] = mapped_column(String(36), ForeignKey("library_items.id", ondelete="CASCADE"), nullable=False)
    episode_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
    media_type: Mapped[str] = mapped_column(String(20), default="book")
    current_time: Mapped[float] = mapped_column(Float, default=0.0)
    duration: Mapped[float] = mapped_column(Float, default=0.0)
    device_id: Mapped[str | None] = mapped_column(String(255), nullable=True)
    device_info: Mapped[dict] = mapped_column(JSON, default=dict)
    media_player: Mapped[str | None] = mapped_column(String(100), nullable=True)
    started_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    hls_session_path: Mapped[str | None] = mapped_column(Text, nullable=True)


class ServerSetting(Base):
    __tablename__ = "server_settings"

    key: Mapped[str] = mapped_column(String(100), primary_key=True)
    value: Mapped[dict | list | str | bool | int | float | None] = mapped_column(JSON, nullable=True)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)


class ScanJob(Base):
    __tablename__ = "scan_jobs"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    library_id: Mapped[str] = mapped_column(String(36), ForeignKey("libraries.id", ondelete="CASCADE"), nullable=False)
    status: Mapped[str] = mapped_column(String(20), default="queued")  # queued/running/done/error
    progress: Mapped[float] = mapped_column(Float, default=0.0)
    items_found: Mapped[int] = mapped_column(default=0)
    started_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    finished_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    log: Mapped[str | None] = mapped_column(Text, nullable=True)