import uuid
import enum
from datetime import datetime
from decimal import Decimal
from sqlalchemy import String, DateTime, Text, ForeignKey, Numeric
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.dialects.postgresql import UUID, JSONB
from app.database import Base


class OrderLine(Base):
    __tablename__ = "order_lines"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    order_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("orders.id", ondelete="CASCADE"), nullable=False, index=True
    )
    product_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("products.id"), nullable=False, index=True
    )
    output_type_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("output_types.id"), nullable=True
    )
    gewuenschte_bildnummer: Mapped[str | None] = mapped_column(String(500), nullable=True)
    item_status: Mapped[str] = mapped_column(String(20), nullable=False, default="pending")
    render_status: Mapped[str] = mapped_column(String(20), nullable=False, default="pending")
    result_path: Mapped[str | None] = mapped_column(String(1000), nullable=True)
    render_log: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
    ai_validation_status: Mapped[str] = mapped_column(String(20), nullable=False, default="not_started")
    ai_validation_result: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
    flamenco_job_id: Mapped[str | None] = mapped_column(String(100), nullable=True)
    render_backend_used: Mapped[str | None] = mapped_column(String(20), nullable=True)
    render_started_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    render_completed_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    unit_price: Mapped[Decimal | None] = mapped_column(Numeric(10, 2), nullable=True)
    render_position_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("product_render_positions.id", ondelete="SET NULL"),
        nullable=True,
    )
    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False
    )

    order: Mapped["Order"] = relationship("Order", back_populates="lines")
    product: Mapped["Product"] = relationship("Product", back_populates="order_lines")
    output_type: Mapped["OutputType | None"] = relationship("OutputType", back_populates="order_lines")
    render_position: Mapped["ProductRenderPosition | None"] = relationship(
        "ProductRenderPosition", back_populates="order_lines"
    )