from fastapi import APIRouter, Depends

from app.api.dependencies import get_backend_service
from app.schemas.backend import (
    BackendCheckResponse,
    BackendListResponse,
    BackendMutationResponse,
    BackendSummary,
    CreateBackendRequest,
    CreateBackendResponse,
)
from app.services.backend_service import BackendService

router = APIRouter()


@router.get("", response_model=BackendListResponse)
async def list_backends(
    service: BackendService = Depends(get_backend_service),
) -> BackendListResponse:
    items = await service.list_backends()
    return BackendListResponse(
        items=[BackendSummary.model_validate(item, from_attributes=True) for item in items]
    )


@router.post("", response_model=CreateBackendResponse)
async def create_backend(
    payload: CreateBackendRequest,
    service: BackendService = Depends(get_backend_service),
) -> CreateBackendResponse:
    backend = await service.create_backend(
        name=payload.name,
        backend_type=payload.type,
        stability_class=payload.stability_class,
        read_priority=payload.read_priority,
        write_priority=payload.write_priority,
        config=payload.config,
    )
    return CreateBackendResponse(backend=BackendSummary.model_validate(backend, from_attributes=True))


@router.post("/{backend_id}/check", response_model=BackendCheckResponse)
async def check_backend(
    backend_id: str,
    service: BackendService = Depends(get_backend_service),
) -> BackendCheckResponse:
    backend, status, detail = await service.check_backend(backend_id)
    return BackendCheckResponse(
        backend_id=backend.id,
        status=status,
        checked_at=backend.last_health_checked_at,
        detail=detail,
    )


@router.post("/{backend_id}/disable", response_model=BackendMutationResponse)
async def disable_backend(
    backend_id: str,
    service: BackendService = Depends(get_backend_service),
) -> BackendMutationResponse:
    backend = await service.disable_backend(backend_id)
    return BackendMutationResponse(backend=BackendSummary.model_validate(backend, from_attributes=True))