import uuid
from datetime import datetime

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

from app.db.base_class import Base


class AuditLog(Base):
    __tablename__ = "audit_logs"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    study_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("studies.id"), nullable=True)
    entity_type: Mapped[str] = mapped_column(String(50), nullable=False)
    entity_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), nullable=True)
    action: Mapped[str] = mapped_column(String(50), nullable=False)
    detail: Mapped[str | None] = mapped_column(Text, nullable=True)
    operator_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
    operator_role: Mapped[str] = mapped_column(String(50), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())