"""Outbox delivery model for per-consumer delivery tracking."""

from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, Integer, 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 OutboxDelivery(Base):
    """Tracks per-consumer delivery status for outbox events.

    Each row represents one consumer (event handler) processing one outbox
    event.  An event is only fully 'published' when all mandatory deliveries
    succeed.
    """

    __tablename__ = "outbox_deliveries"
    __table_args__ = (
        UniqueConstraint("event_id", "consumer_name", name="uq_outbox_deliveries_event_consumer"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        primary_key=True,
        server_default=func.gen_random_uuid(),
    )
    event_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("event_outbox.id", ondelete="CASCADE"),
        nullable=False,
    )
    consumer_name: Mapped[str] = mapped_column(String(150), nullable=False)
    status: Mapped[str] = mapped_column(
        String(30), nullable=False, server_default="pending",
    )
    attempt_count: Mapped[int] = mapped_column(
        Integer, nullable=False, server_default="0",
    )
    next_attempt_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True,
    )
    last_error: Mapped[str | None] = mapped_column(Text, nullable=True)
    processed_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True,
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now(),
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now(),
    )