"""File upload metadata — tracks files stored in S3-compatible object storage."""
import uuid
from datetime import datetime, timezone
from typing import Optional

from sqlalchemy import String, Integer, DateTime, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.dialects.postgresql import UUID

from app.core.database import Base


class FileUpload(Base):
    __tablename__ = "file_uploads"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    account_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("accounts.id", ondelete="CASCADE"), nullable=False, index=True
    )
    uploaded_by: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("users.id", ondelete="SET NULL"), nullable=False
    )
    session_id: Mapped[Optional[uuid.UUID]] = mapped_column(
        UUID(as_uuid=True), nullable=True, index=True
    )
    filename: Mapped[str] = mapped_column(String(255), nullable=False)
    content_type: Mapped[str] = mapped_column(String(100), nullable=False)
    size_bytes: Mapped[int] = mapped_column(Integer, nullable=False)
    storage_key: Mapped[str] = mapped_column(String(500), nullable=False, unique=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )