from hashlib import sha256
import localtoken
import os
import time

def init_setup():
    with open('gerador.dat', 'a', newline='') as setup:
        user = input('Digite o usuário: ')
        local_password = sha256(input('Digite a senha local: ').encode('utf-8')).hexdigest()
        seed_password = sha256(input('Digite a senha semente: ').encode('utf-8')).hexdigest()
        salt = input('Digite o salt: ')
        salted_password = localtoken.get_salted_password(seed_password, salt)

        line = f'{user},{local_password},{salted_password}\n'
        setup.write(line)

        print(f'Usuário [{user}] registrado com sucesso!')

def generate_token():
    user = input('Digite o usuário: ')
    local_password = sha256(input('Digite a senha local: ').encode('utf-8')).hexdigest()
    salted_password = ''
    with open('gerador.dat', 'r', newline='') as setup:
        for line in setup:
            line = line.replace('\n', '')

            if line.split(',')[0] == user and line.split(',')[1] == local_password:
                salted_password = line.split(',')[2]
                break
        else:
            print('Usuário ou senha incorretos!')
            return

    loop_token(user, salted_password)

def loop_token(user, salted_password):
    while True:
        print(f'Gerando token para [{user}]...')
        tokens = [localtoken.generate_token(salted_password)]
        for i in range(4):
            tokens.append(localtoken.generate_token(tokens[-1]))

        for token in tokens:
            print(token[:8])

        # sleep until next minute
        time.sleep(60 - time.time() % 60 + 1)

        # clear console
        os.system('cls' if os.name == 'nt' else 'clear')

def main():
    while True:
        print('Selecione uma opção:')
        print('1 - Registrar usuário')
        print('2 - Gerar token')
        print('0 - Sair')
        option = input('Opção: ')

        if option == '1':
            init_setup()
        elif option == '2':
            generate_token()
        elif option == '0':
            exit()

def exit():
    print('Saindo...')
    quit()


if __name__ == '__main__':
    if not os.path.exists('gerador.dat'):
        open('gerador.dat', 'w').close()

    main()