from datetime import datetime

from pydantic import BaseModel


class BackendSummary(BaseModel):
    id: str
    name: str
    type: str
    stability_class: str
    read_priority: int
    write_priority: int
    is_enabled: bool
    last_health_status: str | None
    last_health_checked_at: datetime | None
    created_at: datetime
    updated_at: datetime


class BackendListResponse(BaseModel):
    items: list[BackendSummary]


class CreateBackendRequest(BaseModel):
    name: str
    type: str
    stability_class: str
    read_priority: int
    write_priority: int
    config: dict


class CreateBackendResponse(BaseModel):
    backend: BackendSummary


class BackendCheckResponse(BaseModel):
    backend_id: str
    status: str
    checked_at: datetime | None
    detail: str | None = None


class BackendMutationResponse(BaseModel):
    ok: bool = True
    backend: BackendSummary