"""Consumer inbox model for outbox idempotency."""

from __future__ import annotations

import uuid
from datetime import datetime

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

from app.core.db import Base


class ConsumerInbox(Base):
    """Tracks which consumers have processed which outbox events.

    Prevents duplicate processing when a worker crashes between
    delivering an event and marking it as published.
    """

    __tablename__ = "consumer_inbox"
    __table_args__ = (
        UniqueConstraint("event_id", "consumer_name", name="uq_consumer_inbox_event_consumer"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    event_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("event_outbox.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    consumer_name: Mapped[str] = mapped_column(String(100), nullable=False, index=True)
    status: Mapped[str] = mapped_column(String(20), nullable=False, default="pending")
    processed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )