Day-8

from art import logo
def main():
    alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u',
                'v', 'w', 'x', 'y', 'z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
                'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']

    direction = input("Type 'encode' to encrypt, type 'decode' to decrypt:\n")
    text = input("Type your message:\n").lower()
    shift = int(input("Type the shift number:\n"))

    def ceasar(start_text, shift_amount, cipher_direction):
        end_text = ""
        for letter in start_text:
            if letter in alphabet:
                position = alphabet.index(letter)
                if direction == "encode":
                    new_position = position - shift_amount
                elif direction == "decode":
                    new_position = position + shift_amount
                shift_amount = shift_amount % 26
                new_word = alphabet[new_position]
                end_text += new_word
            else:
                end_text += letter
        print(f"The {cipher_direction} result is: {end_text}")

    ceasar(text, shift, direction)

main()

last = input("Type 'yes' if you want to go again. Otherwise type 'no'.\n")
if last == "no":
    print("Good Bye")
while last == "yes":
    main()
    last = input("Type 'yes' if you want to go again. Otherwise type 'no'.\n")