import sys
from random import randint

# Game instructions, should be displayed before every user input
def startgame():
	print(
	''' What do you want to play:
		[0] Rock
		[1] Paper
		[2] Scissors

		[9] Quit
	''')

# Checks if input is between 0 and 2
def inputValidation(userInput):
	while userInput not in [0, 1, 2, 9]:
		print(errorMessage)
		try:
			startgame()
			userInput = float(input(prompt))
		except:
			print(errorMessage)
			startgame()
			continue
		if userInput == 9:
			sys.exit()

		if userInput in [0, 1, 2]:
			break
	return userInput 

# Compares user's input with computer's input
def result(ValidatedInput, computerMove):
	moves = {0:'Rock', 1:'Paper', 2:'Scissors'}

	print(f'You played: {moves[ValidatedInput]}\nComputer played: {moves[computerMove]}')
	
	w = 'You Win!'
	l = 'You Lose!'
	
	if ValidatedInput == computerMove:
		print("It's a draw")
	elif ValidatedInput == 0 and computerMove == 1:
		print(l)
	elif ValidatedInput == 0 and computerMove == 2:
		print(w) 	
	elif ValidatedInput == 1 and computerMove == 0:
		print(w)
	elif ValidatedInput == 1 and computerMove == 2:
		print(l)
	elif ValidatedInput == 2 and computerMove == 0:
		print(l)
	elif ValidatedInput == 2 and computerMove == 1:
		print(w)

prompt = '> '
errorMessage = 'Incorrect input, please input one of the provided options'

#Game starts from here
while True:
	computerMove = randint(0, 2)
	while True:
		try:
			startgame()
			userInput = int(input(prompt))
		except:
			print(errorMessage)
			continue
		else:
			break

	if userInput == 9:
		break

	ValidatedInput = inputValidation(userInput)

	result(ValidatedInput, computerMove)

	continue_input = input('Play again [y/n]? ').upper()

	while continue_input not in 'YyNn':
		print('Incorrect input, please type y or n')
		continue_input = input((prompt))
			
	if continue_input == 'N':
		c = False