"""Shared base classes for the Meeting Assistant domain model."""

from datetime import UTC, datetime
from uuid import UUID, uuid4

from pydantic import BaseModel, ConfigDict, Field


def utc_now() -> datetime:
    """Return the current time as a timezone-aware UTC datetime."""
    return datetime.now(UTC)


class DomainModel(BaseModel):
    """Base class for persistent domain entities."""

    model_config = ConfigDict(
        extra="forbid",
        validate_assignment=True,
        use_enum_values=False,
    )

    id: UUID = Field(default_factory=uuid4)
    created_at: datetime = Field(default_factory=utc_now)
    updated_at: datetime = Field(default_factory=utc_now)