import uuid
from datetime import datetime

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

from app.db.base_class import Base


class Attachment(Base):
    __tablename__ = "attachments"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    study_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("studies.id"), nullable=False)
    entity_type: Mapped[str] = mapped_column(String(50), nullable=False)
    entity_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), nullable=False)
    filename: Mapped[str] = mapped_column(String(255), nullable=False)
    file_path: Mapped[str] = mapped_column(String(500), nullable=False)
    file_size: Mapped[int] = mapped_column(Integer, nullable=False)
    content_type: Mapped[str | None] = mapped_column(String(100), nullable=True)
    uploaded_by: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
    uploaded_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
    is_deleted: Mapped[bool] = mapped_column(Boolean, nullable=False, server_default="false")