"""Transactional outbox model — ADR-006."""
from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import DateTime, Index, Integer, String, func
from sqlalchemy import Enum as SAEnum
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.types import JSON

from app.core.database import Base
from app.models.base import UUIDPrimaryKeyMixin
from app.models.types import GUID
from shared.events import EventStatus


class OutboxEvent(UUIDPrimaryKeyMixin, Base):
    """Pending domain events written in the same DB transaction as mutations."""

    __tablename__ = "outbox_events"

    tenant_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False)
    event_type: Mapped[str] = mapped_column(String(150), nullable=False)
    aggregate_type: Mapped[str] = mapped_column(String(100), nullable=False)
    aggregate_id: Mapped[str] = mapped_column(String(100), nullable=False)
    payload: Mapped[dict] = mapped_column(JSON, nullable=False, default=dict)
    status: Mapped[EventStatus] = mapped_column(
        SAEnum(EventStatus, name="healthcare_event_status", native_enum=False),
        default=EventStatus.PENDING,
        nullable=False,
    )
    retry_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )
    processed_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )

    __table_args__ = (
        Index("ix_healthcare_outbox_status", "status"),
        Index("ix_healthcare_outbox_tenant", "tenant_id"),
    )