"""Delivery API controller skeleton."""

import structlog
from fastapi import APIRouter, Depends, HTTPException, Request, status
from fastapi.responses import PlainTextResponse

from app.adapters.postgres.engine import create_postgres_engine, create_postgres_session_factory
from app.adapters.address_suggestions.dadata import DadataAddressSuggestionProvider
from app.adapters.address_suggestions.tomtom import TomTomAddressSuggestionProvider
from app.adapters.address_suggestions.yandex_geosuggest import (
    YandexGeosuggestAddressSuggestionProvider,
)
from app.adapters.delivery_providers.registry import (
    build_delivery_provider_registry,
    resolve_delivery_provider_timeout_seconds,
)
from app.adapters.email import SMTPEmailSender
from app.adapters.tbank import TBankAdapter
from app.config import Settings
from app.controllers.http_client import build_controller_http_client
from app.repositories.cache.redis_cache import PriceCache
from app.repositories.order import OrderRepository
from app.runtime.metrics import get_cache_metrics
from app.schemas.payment import (
    InitPaymentRequest,
    InitPaymentResponse,
    TBankPaymentNotification,
)
from app.schemas.request import DeliveryCalculationRequest, SuggestAddressRequest
from app.schemas.response import AddressSuggestion, DeliveryPrice
from app.services.aggregator import (
    AddressSuggestionsUnavailableError,
    AggregatorService,
    AggregatorServiceError,
    InvalidAddressSuggestRequestError,
    InvalidDeliveryRequestError,
    InvalidInitPaymentRequestError,
    InvalidTBankPaymentNotificationError,
    InitPaymentUnavailableError,
    TBankPaymentNotificationProcessingError,
    UnsupportedAddressSuggestionCountryError,
)

logger = structlog.get_logger(__name__)

router = APIRouter(prefix="/delivery", tags=["delivery"])


_AGGREGATOR_SERVICE_STATE_KEY = "aggregator_service"


def _build_aggregator_service(settings: Settings) -> AggregatorService:
    http_client = build_controller_http_client(
        timeout_seconds=resolve_delivery_provider_timeout_seconds(
            settings.delivery_providers
        )
    )
    delivery_provider_registry = build_delivery_provider_registry(
        http_client=http_client,
        config=settings.delivery_providers,
    )
    payment_adapter = TBankAdapter.from_config(
        http_client=http_client,
        config=settings.tbank_payment,
    )
    dadata_provider = DadataAddressSuggestionProvider.from_config(
        http_client=http_client,
        config=settings.address_suggestions.dadata,
    )
    yandex_geosuggest_provider = YandexGeosuggestAddressSuggestionProvider.from_config(
        http_client=http_client,
        config=settings.address_suggestions.yandex_geosuggest,
    )
    tomtom_provider = TomTomAddressSuggestionProvider.from_config(
        http_client=http_client,
        config=settings.address_suggestions.tomtom,
    )
    cache = PriceCache.from_repository_config(
        settings.repository,
        metrics=get_cache_metrics(),
    )
    postgres_engine = create_postgres_engine(settings.postgres)
    postgres_session_factory = create_postgres_session_factory(postgres_engine)
    order_repository = OrderRepository(session_factory=postgres_session_factory)
    email_sender = SMTPEmailSender(
        smtp_host=settings.email.smtp_host,
        smtp_port=settings.email.smtp_port,
        username=settings.email.username,
        password=settings.email.password,
        from_address=settings.email.from_address,
        use_tls=settings.email.use_tls,
        timeout_seconds=settings.email.timeout_seconds,
    )
    service = AggregatorService(
        providers=delivery_provider_registry.providers,
        cache=cache,
        payment_adapter=payment_adapter,
        payment_price_validation_adapters=(
            delivery_provider_registry.payment_price_validation_adapters
        ),
        order_repository=order_repository,
        order_registration_adapters=(
            delivery_provider_registry.order_registration_adapters
        ),
        email_sender=email_sender,
        address_suggestion_providers=(
            dadata_provider,
            yandex_geosuggest_provider,
            tomtom_provider,
        ),
        address_suggestion_country_to_provider=(
            settings.address_suggestions.country_to_provider
        ),
        weight_round_scale=settings.business_logic.weight_round_scale,
        provider_price_multiplier=settings.business_logic.provider_price_multiplier,
    )
    return service


async def get_aggregator_service(request: Request) -> AggregatorService:
    cached_service = getattr(request.app.state, _AGGREGATOR_SERVICE_STATE_KEY, None)
    if cached_service is not None:
        return cached_service

    settings = request.app.state.settings
    service = _build_aggregator_service(settings)
    setattr(request.app.state, _AGGREGATOR_SERVICE_STATE_KEY, service)
    return service


@router.post(
    "/price",
    response_model=list[DeliveryPrice],
)
async def get_delivery_price(
    delivery_request: DeliveryCalculationRequest,
    service: AggregatorService = Depends(get_aggregator_service),
) -> list[DeliveryPrice]:
    try:
        return await service.get_all_prices(delivery_request)
    except InvalidDeliveryRequestError as exc:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail={
                "code": "invalid_delivery_request",
                "message": "Delivery request contains unknown or unsupported location.",
            },
        ) from exc
    except AggregatorServiceError as exc:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail={
                "code": "aggregator_service_error",
                "message": "Delivery price aggregation is temporarily unavailable.",
            },
        ) from exc


@router.post(
    "/suggest-address",
    response_model=list[AddressSuggestion],
)
async def suggest_addresses(
    address_request: SuggestAddressRequest,
    service: AggregatorService = Depends(get_aggregator_service),
) -> list[AddressSuggestion]:
    logger.info(
        "suggest_address_requested",
        city=address_request.city,
        query=address_request.query,
        limit=address_request.limit,
    )
    try:
        return await service.suggest_addresses(address_request)
    except UnsupportedAddressSuggestionCountryError as exc:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail={
                "code": "unsupported_address_suggestion_country",
                "message": "Address suggestions are not configured for the requested country.",
            },
        ) from exc
    except InvalidAddressSuggestRequestError as exc:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail={
                "code": "invalid_address_suggest_request",
                "message": "Address suggestion request contains invalid or unsupported provider data.",
            },
        ) from exc
    except AddressSuggestionsUnavailableError as exc:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail={
                "code": "address_suggestions_unavailable",
                "message": "Address suggestions are temporarily unavailable.",
            },
        ) from exc


@router.post(
    "/order",
    response_model=InitPaymentResponse,
)
async def init_payment(
    payment_request: InitPaymentRequest,
    service: AggregatorService = Depends(get_aggregator_service),
) -> InitPaymentResponse:
    try:
        return await service.init_payment(payment_request)
    except InvalidInitPaymentRequestError as exc:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail={
                "code": "invalid_init_payment_request",
                "message": "Payment request contains invalid or unsupported TBank data.",
            },
        ) from exc
    except InitPaymentUnavailableError as exc:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail={
                "code": "init_payment_unavailable",
                "message": "Payment initialization is temporarily unavailable.",
            },
        ) from exc
    except AggregatorServiceError as exc:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail={
                "code": "init_payment_unavailable",
                "message": "Payment initialization is temporarily unavailable.",
            },
        ) from exc


@router.post(
    "/tbank/notifications",
    response_class=PlainTextResponse,
)
async def handle_tbank_payment_notification(
    notification: TBankPaymentNotification,
    service: AggregatorService = Depends(get_aggregator_service),
) -> PlainTextResponse:
    logger.info(
        "tbank_notification_received",
        order_id=notification.OrderId,
        status=notification.Status,
        success=notification.Success,
        payment_id=notification.PaymentId,
        error_code=notification.ErrorCode,
        amount=notification.Amount,
    )
    try:
        response_body = await service.handle_tbank_payment_notification(notification)
    except InvalidTBankPaymentNotificationError as exc:
        logger.warning(
            "tbank_notification_rejected",
            order_id=notification.OrderId,
            reason="invalid_token",
        )
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail={
                "code": "invalid_tbank_payment_notification",
                "message": "TBank payment notification token is invalid.",
            },
        ) from exc
    except TBankPaymentNotificationProcessingError as exc:
        logger.error(
            "tbank_notification_processing_failed",
            order_id=notification.OrderId,
            exc_info=True,
        )
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail={
                "code": "tbank_payment_notification_processing_unavailable",
                "message": "TBank payment notification processing is temporarily unavailable.",
            },
        ) from exc
    except AggregatorServiceError as exc:
        logger.error(
            "tbank_notification_processing_failed",
            order_id=notification.OrderId,
            exc_info=True,
        )
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail={
                "code": "tbank_payment_notification_processing_unavailable",
                "message": "TBank payment notification processing is temporarily unavailable.",
            },
        ) from exc
    return PlainTextResponse(response_body)