from typing import List, Optional

from sqlalchemy.orm import Session

from app.core.entities.city import CityEntity
from app.infrastructure.database.models.cities import City
from app.infrastructure.database.repository.city_repository import CitiesRepository


class CitiesService:
    def __init__(self, db: Session):
        self.repository = CitiesRepository(db)

    def get_all_cities(self) -> List[CityEntity]:
        cities = self.repository.get_all()
        return [
            CityEntity(
                id=c.id,
                name=c.name,
                federal_district_id=c.federal_district_id
            )
            for c in cities
        ]

    def get_city_by_id(self, city_id: int) -> Optional[CityEntity]:
        city = self.repository.get_by_id(city_id)
        if city:
            return CityEntity(
                id=city.id,
                name=city.name,
                federal_district_id=city.federal_district_id
            )
        return None

    def create_city(self, entity: CityEntity) -> CityEntity:
        city_model = City(
            name=entity.name,
            federal_district_id=entity.federal_district_id
        )
        created_city = self.repository.create(city_model)
        return CityEntity(
            id=created_city.id,
            name=created_city.name,
            federal_district_id=created_city.federal_district_id
        )

    def update_city(self, city_id: int, entity: CityEntity) -> Optional[CityEntity]:
        city_model = self.repository.get_by_id(city_id)
        if city_model:
            city_model.name = entity.name
            city_model.federal_district_id = entity.federal_district_id
            self.repository.update(city_model)
            return CityEntity(
                id=city_model.id,
                name=city_model.name,
                federal_district_id=city_model.federal_district_id
            )
        return None

    def delete_city(self, city_id: int) -> bool:
        return self.repository.delete(city_id) is not None