import random

# 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 following list: {valid_ans}"

    while True:

        user_response = input(question).lower()

        for item in valid_ans:
            if item == user_response:
                return item

            elif user_response == item[0]:
                return item
        # print error if user does not enter something that valid
        print(error)
        print()


# Displays instructions

def instruction():
    print('''
****Instructions****
You will see simple math questions like:
> 2 x 5 = ?

Type your answer in the space provided.
Example:
> If the question is 2 x 5 = ?, the correct answer is 10.

If you answer correctly, you move on to the next question.
✔ Correct: 2 x 5 = 10 → Great job!

If you answer incorrectly, don’t worry!
✘ Wrong: 2 x 5 = 12 → That’s not right. The correct answer will be shown so you can learn.

Try to get as many correct as you can!

Good Luck!
''')


# Main routine

print("🧠📝💡Multiplication Quiz🧠📝💡")
print()

# ask user if they want to see the instructions and display them if requested
want_instructions = string_checker("Do you want to read the instructions? ")

# checks users enter yes (y) or no (n)
if want_instructions == "yes":
    instruction()


# Game logic (multiplication quiz)
def answer_compare(user, ans):
    if user == ans:
        return "correct"
    else:
        return "incorrect"

questions_won = 0
questions_incorrect = 0

num_questions = 10

for i in range(num_questions):
    num_1 = random.randint(1, 9)
    num_2 = random.randint(1, 9)
    correct_answer = num_1 * num_2

    try:
        user_answer = int(input(f'Question {i+1}: What is {num_1} x {num_2}? '))
    except ValueError:
        print("Invalid input! Please enter a number.")
        questions_incorrect += 1
        continue

    result = answer_compare(user_answer, correct_answer)

    if result == "correct":
        questions_won += 1
        print("Correct!")
    else:
        questions_incorrect += 1
        print(f"Wrong! The correct answer was {correct_answer}")

# Final Score Summary
print(f"\nGame Over! ✔ You got {questions_won} correct and ✘ {questions_incorrect} incorrect.")