import tortoise.models

from .field_generator import field_generator

class model(tortoise.models.Model):
    id = field_generator.primary_key()

    def _validators(self) -> dict:
        return dict()

    def __validate_item(self, validator: callable, key: str) -> None:
        try:
            if validator(self.__get(key)) == self.__get(key):
                return

            raise ValueError("Validated value is not same.")

        except Exception as error:
            value = self.__get(key)
            model_name = type(self).__name__
            
            info = "Model \"" + model_name + "\" contain invalid "
            info = info + "data in field \"" + key + "\". Content of "
            info = info + "field is \"" + value + "\". Found error \""
            info = info + str(error) + "\"."

            raise ValueError(info)

    def __get(self, key: str) -> any:
        return self.__getattribute__(key)

    def validate(self) -> object:
        for key, validator in self._validators().items():
            self.__validate_item(validator, key)
        
        return self

    class Meta:
        app = "class"