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


class MaterialAlias(Base):
    __tablename__ = "material_aliases"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    material_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("materials.id", ondelete="CASCADE"), nullable=False
    )
    alias: Mapped[str] = mapped_column(String(300), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, nullable=False)

    material = relationship("Material", back_populates="aliases")