from __future__ import annotations

from datetime import datetime
from enum import StrEnum
from uuid import UUID

from pydantic import BaseModel, ConfigDict


class NotificationStatus(StrEnum):
    PENDING = "PENDING"
    DISPATCHING = "DISPATCHING"
    RETRY_WAIT = "RETRY_WAIT"
    DELIVERED = "DELIVERED"
    FAILED = "FAILED"
    HELD_FOR_REVIEW = "HELD_FOR_REVIEW"


class NotificationKind(StrEnum):
    FIRING = "FIRING"
    RESOLVED = "RESOLVED"
    TEST = "TEST"


class NotificationDeliveryResponse(BaseModel):
    """Safe operator-facing delivery metadata. Payload and destination are never returned."""

    model_config = ConfigDict(extra="forbid", from_attributes=True)

    id: UUID
    alert_history_event_id: UUID | None
    route_key: str
    event_kind: NotificationKind
    severity: str | None
    status: NotificationStatus
    attempt_count: int
    next_attempt_at: datetime | None
    last_attempt_at: datetime | None
    delivered_at: datetime | None
    last_http_status: int | None
    last_error_code: str | None
    created_at: datetime


class NotificationTestResponse(BaseModel):
    model_config = ConfigDict(extra="forbid")

    delivery: NotificationDeliveryResponse
    message: str