import random

# Check that users have entered a valid answer
# option based on 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 entre something that is valid
        print(error)
        print()

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

        to_check = input(question)

        try:
            response = int(to_check)

            # checks that the number is equal or more
            if low <= response <= high:
                return response
            else:
                print(error)

        except ValueError:
            print(error)

yes_no = ["yes", "no"]
difficulty_levels = ["easy", "medium", "hard"]

# Ask user for difficulty level
difficulty = string_checker("Chose a difficulty level from easy, medium, or hard: ", difficulty_levels)
print(f"You chose, {difficulty}")


# Game loop starts here
for _ in range(5):
    # Set number ranges based on chosen difficulty
    if difficulty == "easy":
        first_number = random.randint(1, 5)
        second_number = random.randint(1, 5)
    elif difficulty == "medium":
        first_number = random.randint(3, 12)
        second_number = random.randint(3, 12)
    else:  # hard
        first_number = random.randint(10, 20)
        second_number = random.randint(10, 20)

    # Asks multiplication question
    user_answer = int_checker(f"Question: {first_number} x {second_number} = ", 1, 400)
    print(f"You chose, {user_answer}")