"""This programme runs a multiplication quiz."""

import random


# define functions and variables

"""This function detects if the answer given is an
integer and between a range."""


def int_check(question, low, high):
    while True:
        error = f"Please enter an integer that is between {low} and {high}."

        to_check = input(question)

        if to_check == "":
            return error

        try:
            response = int(to_check)

            # checks if input is above or below desired range
            if low <= response <= high:
                return response

            else:
                print(error)

        except ValueError:
            print(error)


def string_checker(question, valid_ans=("yes", "no")):
    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


def results():
    """prints instructions"""

    print(f"""
*** Results ***

You ended with a score of {points}/{num_questions}.
(which is {round(points / num_questions * 100, 2)}%)
    """)


mode = "regular"
question_number = 0
points = 0
want_results = 0
# Main Routine goes here


print("Multiplication Quiz")
print()
# Instructions

# Ask user for number of questions / infinite mode
num_questions = int_check("Enter a number between 5 and 15. "
                               "This will be the number of questions"
                               " you will answer: ", 5, 15)


# game loop starts here
while question_number < num_questions:

    question_heading = f"\n Question {question_number + 1} of {num_questions}"

    print(question_heading)
    print()

    # set temporary variables
    integer_1 = random.randint(1, 10)
    integer_2 = random.randint(1, 10)
    correct_answer = integer_1 * integer_2

    # asks question
    # determines if the answer given is equal to the correct answer
    user_choice = int(input(f"{integer_1} x {integer_2} = "))

    if int(user_choice) == int(correct_answer):
        print("✅  Correct!")
        points = points + 1
    else:
        print(f"❌  The correct answer was {correct_answer}")

    if user_choice == "xxx":
        break

    question_number += 1

# game loop ends here

# game history / statistic area
print()
print("You have finished your quiz!")
want_results = string_checker("Would you like to see your results? ")
if want_results == 'yes':
    results()