import csv
from faker import Faker
import hashlib
from sys import argv

SLOTS = 1000
FILENAME = "dummy_file.csv"

fake = Faker('de_DE')

fake.name()

def create_dummy_file(filename=FILENAME):

    fake = Faker('de_DE')

    with open(filename, 'w', newline='', encoding='utf-8') as csvfile:
        fieldnames = ['Benutzername', 'Passwort']
        writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
        writer.writerow(dict(zip(fieldnames, fieldnames)))

        for _ in range(SLOTS):
            username = fake.user_name()
            password = fake.password(
                length=5, 
                special_chars=False,
                digits=False,
                upper_case=False,
                lower_case=True
            )

            new_hash_func = hashlib.sha256()
            new_hash_func.update(password.encode('utf-8'))
            new_hash_value = new_hash_func.hexdigest()

            writer.writerow({'Benutzername': username, 'Passwort': new_hash_value})

    print(f"Success: {SLOTS} Entries!")


def main():
    global SLOTS
    global FILENAME
    try:
        if len(argv) == 2:
            SLOTS = int(argv[1])
    except ValueError as e:
        print(e)
        exit(-1)
    
    new_file = 'dummy_file.csv'
    create_dummy_file(new_file)

if __name__ == "__main__":
    main()