import typing

from .app_route import app_route
from .product import product 
from .product import product_factory
from .product_loader import product_loader
from .product_response import product_response
from .product_builder import product_builder

class product_app(app_route):
    def all(self) -> dict:
        with self.__products_database as loader:
            return self.__collection(loader.load_all())

    def get_barcode(self, target: str) -> dict:
        with self.__products_database as loader:
            return self.__single(loader.get_by_barcode(target))

    def get_name(self, target: str) -> dict:
        with self.__products_database as loader:
            return self.__single(loader.get_by_name(target))

    def search_name(self, target: str) -> dict:
        with self.__products_database as loader:
            return self.__collection(loader.search_by_name(target))

    def search_author(self, target: str) -> dict:
        with self.__products_database as loader:
            return self.__collection(loader.search_by_author(target))

    def check_barcode(self, target: str) -> dict:
        with self.__products_database as loader:
            return self.__exists(loader.barcode_in_use(target))

    def check_name(self, target: str) -> dict:
        with self.__products_database as loader:
            return self.__exists(loader.name_in_use(target))

    def create(self, send: dict) -> dict:
        with self.__products_database as loader:
            target = product_builder().modify(send).result
            result = loader.store(target)

            return self.__modify(result, "Can nod create product.")

    def update(self, send: dict) -> dict:
        barcode = send["target_barcode"] if "target_barcode" in send else None
        name = send["target_name"] if "target_name" in send else None

        if barcode is not None and name is not None:
            return self._fail("Give only one, name OR by barcode.")

        if barcode is None and name is None:
            return self._fail("Identify target by name or barcode.")

        with self.__products_database as loader:
            if barcode is not None:
                target = loader.get_by_barcode(barcode)
            else:
                target = loader.get_by_name(name)

            if target is None:
                return self._fail("Not found product to update.")

            updated = product_builder(target).modify(send).result
            result = loader.store(updated)

            return self.__modify(result, "Can not update product.")

    def delete(self, send: dict) -> dict:


    def __modify(self, result: bool, cause: str) -> dict:
        if result:
            return self._success()
        else:
            return self._fail(cause)

    def __exists(self, result: bool) -> dict:
        return self._success(exists = result)

    def __single(self, target: product) -> dict:
        if target is None:
            return self._fail("Can not found product in database.")

        return self.__success(product = product_response(target))

    def __collection(self, target: typing.Iterable[product]) -> dict:
        return self.__success(collection = product_response(target))

    @property
    def __products_database(self) -> product_loader:
        return product_loader(self._connection)