import uuid
import enum
from datetime import datetime
from sqlalchemy import String, DateTime, Boolean, Text, BigInteger, Float, Integer, ForeignKey
from sqlalchemy import Enum as SAEnum
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.dialects.postgresql import UUID, JSONB
from app.database import Base


class MediaAssetType(str, enum.Enum):
    thumbnail = "thumbnail"
    still = "still"
    turntable = "turntable"
    stl_low = "stl_low"
    stl_high = "stl_high"
    gltf_geometry = "gltf_geometry"      # DEPRECATED: use usd_master — viewer GLB auto-generated as part of USD pipeline
    gltf_production = "gltf_production"  # DEPRECATED: use usd_master — high-quality production GLB superseded by USD master
    blend_production = "blend_production"
    usd_master = "usd_master"


class MediaAsset(Base):
    __tablename__ = "media_assets"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    tenant_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("tenants.id", ondelete="CASCADE"), nullable=True, index=True
    )
    product_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("products.id", ondelete="CASCADE"), nullable=True, index=True
    )
    cad_file_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("cad_files.id", ondelete="SET NULL"), nullable=True
    )
    order_line_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("order_lines.id", ondelete="SET NULL"), nullable=True, index=True
    )
    workflow_run_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("workflow_runs.id", ondelete="SET NULL"), nullable=True
    )
    asset_type: Mapped[MediaAssetType] = mapped_column(
        SAEnum(MediaAssetType, name="media_asset_type"), nullable=False
    )
    storage_key: Mapped[str] = mapped_column(Text, nullable=False)
    file_size_bytes: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
    mime_type: Mapped[str | None] = mapped_column(String(100), nullable=True)
    width: Mapped[int | None] = mapped_column(Integer, nullable=True)
    height: Mapped[int | None] = mapped_column(Integer, nullable=True)
    duration_s: Mapped[float | None] = mapped_column(Float, nullable=True)
    render_config: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
    is_archived: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, nullable=False)