"""
©AngelaMos | 2026
base.py

Abstract SQLModel base class providing UUID primary key
and timezone-aware created_at timestamp

TimestampedModel defines id as a uuid4 primary key and
created_at as a DateTime(timezone=True) column with
CURRENT_TIMESTAMP server default. All domain models
inherit from this base

Connects to:
  models/threat_event    - ThreatEvent inherits
  models/model_metadata  - ModelMetadata inherits
"""

import uuid
from datetime import datetime

from sqlalchemy import DateTime, text
from sqlmodel import Field, SQLModel


class TimestampedModel(SQLModel):
    """
    Abstract base providing UUID primary key and timezone-aware created_at.
    """

    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
    created_at: datetime = Field(  # type: ignore[call-overload]
        sa_type=DateTime(timezone=True),
        sa_column_kwargs={"server_default": text("CURRENT_TIMESTAMP")},
        nullable=False,
    )