import random

# Check if the user entered a valid option from the list
def string_checker(question, valid_ans=("yes", "no")):
    error = f"Please enter a valid option from the following list: {valid_ans}"
    while True:
        user_response = input(question).lower()
        for item in valid_ans:
            if item == user_response or user_response == item[0]:
                return item
        print(error)
        print()

# Checks for an integer more than 0
def int_check(question):
    while True:
        error = "Please enter an integer that is 1 or more."
        to_check = input(question)

        try:
            response = int(to_check)
            if response < 1:
                print(error)
            else:
                return response
        except ValueError:
            print(error)

# Main Routine
print("--- Simple Multiplication Quiz ---")
print()

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

if want_instructions == "yes":
    print("Welcome to my multiplication quiz.")
    print("You will be asked to multiply two random numbers.")
    print("Type 'xxx' as your answer to quit the game.")
    print()

rounds_played = 0
score = 0

num_rounds = int_check("How many rounds do you want to play? ")

# Game loop
while rounds_played < num_rounds:

    rounds_heading = f"\n--- Question {rounds_played + 1} of {num_rounds} ---"

    print(rounds_heading)
    print()

    # Generate numbers between 5-15 and 2-10
    number_one = random.randint(5, 15)
    number_two = random.randint(2, 10)
    answer = number_one * number_two

    # Get user answer
    user_input = input(f"{number_one} * {number_two} = ").lower()

    # Exit code check
    if user_input == "xxx":
        break

    # Checks if answer is correct
    try:
        user_answer = int(user_input)
        if user_answer == answer:
            print("Correct!")
            score += 1
        else:
            print(f"Incorrect. The answer was {answer}")

        rounds_played += 1

    except ValueError:
        print("Please enter a valid number or 'xxx' to quit.")

# Game History and Statistics
print("\n--- Game Over! ---")
if rounds_played > 0:
    print(f"You scored {score} out of {rounds_played} questions correctly.")
else:
    print("You didn't play any rounds!")