from datetime import datetime


class RawData:
    def __init__(self, data):
        self.__dict__.update(data)

    def get_str(self, attr):
        return RawData.get_str_st(self.__dict__, attr)

    @staticmethod
    def get_str_st(value, attr):
        if value is None:
            return ''
        result = value[attr]
        if result is None:
            return ''
        return result

    def get_int(self, attr):
        return RawData.get_int_st(self.__dict__, attr)

    @staticmethod
    def get_int_st(value, attr):
        if value is None:
            return ''
        result = value[attr]
        if result is None:
            return ''
        if not str(result).isnumeric():
            print(f'The value {result} is not a number')
            return ''
        return result

    @staticmethod
    def str_to_date(value, str_format):
        return datetime.strptime(value, str_format).date().strftime('%d.%m.%Y')

    @staticmethod
    def get_date_st(value):
        if value is None:
            return ''
        try:
            return RawData.str_to_date(value, '%d.%m.%Y')
        except ValueError:
            try:
                return RawData.str_to_date(value, '%d.%m.%y')
            except ValueError:
                print(f'Invalid date {value}')
                return ''

    @staticmethod
    def get_collection_st(collection, function):
        if collection is None:
            return ''
        result_list = list(map(lambda item: function(item), collection))
        if len(result_list) == 0:
            return ''
        return result_list