"""Base interface for delivery providers."""

from abc import ABC, abstractmethod

from app.schemas.request import DeliveryCalculationRequest
from app.schemas.response import DeliveryPrice


class DeliveryProvider(ABC):
    name: str

    @abstractmethod
    async def get_prices(
        self, request: DeliveryCalculationRequest
    ) -> list[DeliveryPrice]:
        """Fetch provider tariffs for a delivery request."""

        raise NotImplementedError


class ProviderClientError(RuntimeError):
    """Raised when a provider call fails for temporary or provider-side reasons."""


class ProviderRequestError(RuntimeError):
    """Raised when a provider rejects input request data."""