import random

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

    error = f"Please enter a valid option from the following list: {valid_ans}"

    while True:

          # Get user response and make sure it's 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 does not enter something valid
          print(error)
          print()

# Displays instructions
def instructions():
    # Prints instructions

    print(""" 
*** Instructions ***

To begin, choose the number of rounds (or press <enter> for infinite mode).

The rules are simple: The computer will ask you a multiplication question. 
Each number will be no higher than 12.
All you have to do is enter the correct answer to the question!

Type <xxx> to end the game at any time.

Good Luck! """)

# Checks for an integer more than 0 (allows <enter>)
def int_check(question):

    while True:
        error = "Please enter an integer that is 1 or more."

        to_check = input(question)

        # check for infinite mode
        if to_check == "":
             return "infinite"

        try:
            response = int(to_check)

            # check that the number is more than / equal to 1
            if response < 1:
                print()
                print(error)
                print()

            else:
               return response

        except ValueError:
            print()
            print(error)
            print()

# Compares user / computer choice and returns
# result (win / lose / tie)
def answer_compare(user, answer):

    # If the user and the actual answer is the same, it's correct
    if user == answer:
        round_result = "correct"

    # If it's not correct, then it's incorrect
    else:
        round_result = "incorrect"

    return round_result


# Main Routine starts here

# Initialise game variables
mode = "regular"
rounds_played = 0
rounds_tied = 0
rounds_lost = 0
yes_no = ["yes", "no"]

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

print()
print(" o[]= Multiplication Game =[]o ")
print()

# Ask user if they want to see instructions, and display if requested

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

# Checks user enters yes (y) or no (n)
if want_instructions == "yes":
    instructions()

# Ask user for number of rounds / infinite mode
num_rounds = int_check("How many rounds would you like? Push 'enter' for infinite mode ")

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

# Game loop starts here
while rounds_played < num_rounds:

    # Rounds headings
    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)
    print()

    # Get user choice
    user_choice = string_checker("Choose: ", rps_list)

    # If user choice is the exit code, break the loop
    if user_choice == "xxx":
        break

        # Randomly choose from the rps list (excluding the exit code)
    comp_choice = random.choice(rps_list[:-1])
    print("Computer choice: ", comp_choice)

    result = answer_compare(user_choice, comp_choice)

    # Adjust game lost / game tied counters and add results to game history
    if result == "tie":
        rounds_tied += 1
        feedback = "It's a tie!"
    elif result == "lose":
        rounds_lost += 1
        feedback = "You lose. :("
    else:
        feedback = "You won!!"

    # Set up round feedback and output it to user.
    # Add it to the game history list (include the round number)
    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

    # if users are in infinite mode, increase number of rounds!
    if mode == "infinite":
     num_rounds += 1

# Game loop ends here
print()

# Game History / Statistics area
if rounds_played > 0:
    # Calculate Statistics
    rounds_won = rounds_played - rounds_tied - rounds_lost
    percent_won = rounds_won / rounds_played * 100
    percent_lost = rounds_lost / rounds_played * 100
    percent_tied = 100 - percent_won - percent_lost

    # Output Game Statistics
    print(" +++ Game Statistics +++ ")
    print(f"Won: {percent_won:.2f} \t "
          f"Lost: {percent_lost:.2f} \t "
          f"Tied: {percent_tied:.2f}")

    # ask user if they want to see their game history, and output it if requested.
    see_history = string_checker("\nDo you want to see your game history? ", yes_no)
    if see_history == "yes":
        print()
        for item in game_history:
            print(item)

    print()
    print("Thanks for playing.")

else:
    print("Oops - You chickened out!")