import csv, os, re
from var_dump import var_dump
from typing import Dict, List, Tuple

EMPTY_FILE_STRING = 'Пустой файл'


class DataSet:
    def __init__(self, file_name: str):
        self.file_name = file_name
        self.vacancies_objects = [Vacancy(vacancy) for vacancy in self.csv_filer(*self.csv_reader(file_name))]

    @staticmethod
    def clean_string(html_tags: str) -> str:
        cleaned_string = re.sub('<.*?>', '', html_tags)
        return cleaned_string if '\n' in html_tags else ' '.join(cleaned_string.split())

    @staticmethod
    def csv_reader(file_name: str) -> Tuple[List[str], List[List[str]]]:
        reader = csv.reader(open(file_name, encoding='utf_8_sig'))
        all_date = [line for line in reader]
        return all_date[0], all_date[1:]

    def csv_filer(self, headlines: List[str], reader: List[List[str]]) -> List[Dict[str, str]]:
        updated_vacancies_list = list(filter(lambda vacancy: (
                len(vacancy) == len(headlines) and
                vacancy.count('') == 0), reader))
        return [dict(zip(headlines, map(self.clean_string, vacancy))) for vacancy in updated_vacancies_list]


class Vacancy:
    def __init__(self, vacancies_list: Dict[str, str]):
        self.name = vacancies_list['name']
        self.description = vacancies_list['description']
        self.key_skills = vacancies_list['key_skills'].split('\n')
        self.experience_id = vacancies_list['experience_id']
        self.premium = vacancies_list['premium']
        self.employer_name = vacancies_list['employer_name']
        self.salary = Salary(salary_from=vacancies_list['salary_from'],
                             salary_to=vacancies_list['salary_to'],
                             salary_gross=vacancies_list['salary_gross'],
                             salary_currency=vacancies_list['salary_currency'])
        self.area_name = vacancies_list['area_name']
        self.published_at = vacancies_list['published_at']


class Salary:
    def __init__(self, salary_from: str, salary_to: str, salary_gross: str, salary_currency: str):
        self.salary_from = salary_from
        self.salary_to = salary_to
        self.salary_gross = salary_gross
        self.salary_currency = salary_currency


def exit_file(received_message: str) -> None:
    print(received_message)
    exit()


csv_name = input('Введите название файла: ')
order_option = input('Введите параметр фильтрации: ')
sort_option = input('Введите параметр сортировки: ')
is_reversed = input('Обратный порядок сортировки (Да / Нет): ')
interval = list(map(int, input('Введите диапазон вывода: ').split()))
needed_columns = input('Введите требуемые столбцы: ')
if os.stat(csv_name).st_size == 0:
    exit_file(EMPTY_FILE_STRING)
var_dump(DataSet(file_name=csv_name))