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#!/usr/bin/env python3

"""

Python program to translate to and from Morse code.

https://en.wikipedia.org/wiki/Morse_code

"""

# fmt: off

MORSE_CODE_DICT = {

"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": "--..", "1": ".----",

"2": "..---", "3": "...--", "4": "....-", "5": ".....", "6": "-....", "7": "--...",

"8": "---..", "9": "----.", "0": "-----", "&": ".-...", "@": ".--.-.",

":": "---...", ",": "--..--", ".": ".-.-.-", "'": ".----.", '"': ".-..-.",

"?": "..--..", "/": "-..-.", "=": "-...-", "+": ".-.-.", "-": "-....-",

"(": "-.--.", ")": "-.--.-", "!": "-.-.--", " ": "/"

} # Exclamation mark is not in ITU-R recommendation

# fmt: on

REVERSE_DICT = {value: key for key, value in MORSE_CODE_DICT.items()}

def encrypt(message: str) -> str:

"""

>>> encrypt("Sos!")

'... --- ... -.-.--'

>>> encrypt("SOS!") == encrypt("sos!")

True

"""

return " ".join(MORSE_CODE_DICT[char] for char in message.upper())

def decrypt(message: str) -> str:

"""

>>> decrypt('... --- ... -.-.--')

'SOS!'

"""

return "".join(REVERSE_DICT[char] for char in message.split())

def main() -> None:

"""

>>> s = "".join(MORSE_CODE_DICT)

>>> decrypt(encrypt(s)) == s

True

"""

message = "Morse code here!"

print(message)

message = encrypt(message)

print(message)

message = decrypt(message)

print(message)

if __name__ == "__main__":

main()