from typing import Optional
from services.territory.territories_repository import TerritoriesRepository
from services.territory.constants import GLOBAL_TERRITORY_ID
from utils.exceptions import BadRequest


class TerritoriesService:

    territories_repository = TerritoriesRepository()

    def get_country_code_for_delphi_api(self, territory_id: Optional[int], global_value=None) -> Optional[str]:
        # we don't need the parameter if we have our filter in "worldwide"
        if territory_id == GLOBAL_TERRITORY_ID:
            return global_value
        territory = self.territories_repository.get_territory_by_id(territory_id)
        if territory is None:
            raise BadRequest("Invalid territory id")
        return territory.code.lower()