import random 

def rps_compare(user, comp):

    # if computer and user choice are the same
    if user == comp:
        result = "tie"


    elif user == 'paper' and comp == 'rock':
        result = 'win'
    elif user == 'scissors' and comp == 'paper':
        result = 'win'
    elif user == 'rock' and comp == 'scissors':
        result = 'win'




    # if it's not win or tie its lose
    else:
        result = 'lose'

    return result

# Check that users have entered a valid
# option based on a list
def string_checker(question, valid_ans=("yes", "no")):

    error = f'please enter a valid option from the following list: {valid_ans}'

    while True:

        #get user response and turn it lowercase
        user_response = input(question).lower()

        for item in valid_ans:
            # check if the user response is a word in the list
            if item == user_response:
                return item

            #check if the user response is the same as the first letter of an item in the list

            elif user_response == item[0]:
                return item

        #print error if user not enter correct
        print(error)
        print()


# Check that users have entered a valid
# option based on a list
#checks that user enter an integer that is more than 0

def int_check(question):

    while True:
        error = "please enter an integer that is more than 1 "

        to_check = input(question)

        if to_check =="":
            return "infinite"

        try:
            response = int(to_check)

            #checks that the number is okay
            if response < 1:
                print(error)

            else:
                return response

        except ValueError:
            print(error)


def instructions():
    print('''
    paper beat rock, rock best scissors, scissors beat paper.

    gl


    ''')


# main routine starts here

print(' rock papaer scissor game ')
print()

# intialise game varibles

mode = 'regular'
rounds_played = 0

rps_list = ["rock", "paper", "scissors", 'xxx']






#instructions ask if they want then display

want_instructions = string_checker("Do you want to see the instructions? ")


# checks users enter y or n
if want_instructions == 'yes':
    instructions()



#ask user for number of rounds or infintie mode

num_rounds = int_check('How many rounds woul you like? pushe neter for infitine mode: ')

if num_rounds == 'infinite':
    mode = 'infinite'
    num_rounds = 5

#game loop starts here
while rounds_played < num_rounds:

    # rounds heading
    if mode == "infinite":
        rounds_heading = f"Round {rounds_played + 1} (Infinite Mode)"
    else:
        rounds_heading = f' Round {rounds_played + 1} of {num_rounds}'

    print(rounds_heading)
    print()

    # randomly choose from the rps list apart from exit code
    comp_choice = random.choice(rps_list[:-1])
    print('computer choice', comp_choice)

    user_choice = string_checker('choose: ', rps_list)
    print('you chose', user_choice)

    #ending the infintie mode
    if user_choice == 'xxx':
        break



    result = rps_compare(user_choice, comp_choice)
    print(f"{user_choice} vs {comp_choice}, {result}")

    rounds_played += 1


    # if users are infinite mode increase number of rounds
    if mode == 'infinite':
        num_rounds += 1

# game loop ends here

#game history stats