import random


# Check that users have entered a valid
# option based on a list
def string_checker(question, valid_ans):
    while True:

        error = f"Enter a valid option from {valid_ans}"

        user_response = input(question).lower()

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

            elif user_response == item[0]:
                return item

        print(error)
        print()


def instructions():
    print('''
    
        **** Instructions ****
        
        To begin, choose the number of rounds (or press <enter> for infinite mode).
        
        Then play against the computer, You enter R (rock), P (paper) or S (scissors),
        
        The rules are:
        Paper beats rock
        Rock beats scissors
        Scissors beats paper
        
        Press xxx to end the game at any time
            
            '''
          )

# compare the comp selection v the user input
# result - win, lose or tie


def rps_compare(user, comp):

    if user == comp:
        round_result = "tie"
    elif user == "paper" and comp == "rock":
        round_result = "win"
    elif user == "rock" and comp == "scissors":
        round_result = "win"
    elif user == "scissors" and comp == "paper":
        round_result = "win"
    else:
        round_result = "lose"

    return round_result

# checks the input is an integer


def int_check(question):

    while True:
        error = "Enter an integer more than 1"

        to_check = input(question)

        if to_check == "":
            return "infinite"

        try:
            response = int(to_check)

            # check the number is more than 1
            if response >= 1:
                return response

            else:
                print(error)

        except ValueError:
            print(error)


# Main routine


# game variables
mode = "regular"
rounds_played = 0
rounds_tied = 0
rounds_lost = 0
rounds_won = 0
yes_no = ["yes","no"]
rps_list = ["rock", "paper", "scissors", "xxx"]
game_history = []


print()
print(" ⛰️ 🧻 ✂️ Rock / Paper / Scissors Game ⛰️ 📰 ✂️ ")
print()

print("** Welcome to the Rock, Paper, Scissors Game **")
print()

# instructions

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

if want_instructions == "yes":
    instructions()

num_rounds = int_check("Enter the number of rounds or press enter for unlimited ")

# infinite mode - increase number of rounds
if num_rounds == "infinite":
    mode = "infinite"
    num_rounds = 5

# game loop starts here

while rounds_played < num_rounds:
    # infinite mode
    if mode == "infinite":
        rounds_heading = f"\n*** Round {rounds_played + 1} (Infinite Mode) ***"
    else:
        rounds_heading = f"\n*** Round {rounds_played + 1} of {num_rounds} ***"

    print(rounds_heading)

    user_choice = string_checker("What do you choose: ", rps_list)

    # infinite mode - increase number of rounds
    if mode == "infinite":
        num_rounds += 1

    if user_choice == "xxx":
        break

    # Random computer choice
    comp_choice = random.choice(rps_list[:-1])

    result = rps_compare(user_choice, comp_choice)

    # Add counters for the result and the game history
    if result == "tie":
        rounds_tied += 1
        feedback = "*** It's a tie! ***"
    elif result == "win":
        rounds_won += 1
        feedback = "\U0001F607 \U0001F929 You won! \U0001F929 \U0001F607"
    else:
        rounds_lost += 1
        feedback = "*** You lose! ***"

    round_feedback = f"{user_choice} vs {comp_choice}: {feedback}"
    history_item = f"Round: {rounds_played + 1} - {round_feedback}"

    print(round_feedback)
    game_history.append(history_item)

    rounds_played += 1

    # infinite mode - increase number of rounds
    if num_rounds == "infinite":
        num_rounds += 1

if rounds_played > 0:

    # Calculate stats
    rounds_won = rounds_played - rounds_tied - rounds_lost
    percentage_won = rounds_won / rounds_played * 100
    percentage_lost = rounds_lost / rounds_played * 100
    percentage_tied = 100 - percentage_won - percentage_lost

    # Display Game Stats

    print()
    print("**** GAME STATS ****")
    print(f"You won {rounds_won} out of {rounds_played} rounds")
    print(f"Won: {percentage_won:.2f} % \t"
          f"Lost: {percentage_lost:.2f} % \t"
          f"Tied: {percentage_tied:.2f} % \t")

    print()
    # Game history option
    see_history = string_checker("Do you want to see your game history? ",yes_no)
    if see_history == "yes":
        for item in game_history:
            print(item)

else:
    print("😾😾😾  Scaredy Cat! 😾😾😾")

# End of program message
print()
print("The program has ended")