import random

# Checks that a user input is a valid number
def int_check(question, low, high, error_type):
    while True:

        # changes error message based on error_type

        if error_type == 1:
            error = f"Please enter a number between {low} and {high}"

        else:
            error = 'Please enter a number'

        to_check = input(question)

        try:
            response = int(to_check)

            # checks that the number is between low and high
            if low <= response <= high:
                return response

            else:
                print(error)

        except ValueError:
            try:
                if error_type == 1:
                    response = int(to_check)

                    # checks that the number is between low and high
                    if low <= response <= high:
                        return response

                    else:
                        print(error)
                else:
                    response = float(to_check)

                    # checks that the number is between low and high
                    if low <= response <= high:
                        return response

                    else:
                        print(error)

            except ValueError:
                print(error)

# 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 its 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 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 that is valid
        print(error)
        print()

#displays instructions if the user inputs yes
def instructions():
    """Prints instructions"""

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

To begin, choose the number of rounds.

Then, answer the given question with a number.

Round to two decimal places when necessary.

Good Luck!
    """)

# Main routine goes here

# Initialise game variables
rounds_played = 0
operator_list = ["+", "-", "*", "/"]
game_history = []
yes_no = ['yes', 'no']

print(f"\n✖️➕➗➖ Mathematics Quiz ➖➗➕✖️")
print()

# Ask the user if they want instructions (yes/no)
want_instructions = string_checker("Do you want to see the instructions? ", yes_no)

# Display the instructions if the user wants to see them...
if want_instructions == "yes":
    instructions()

# Ask the user for the number of rounds
num_rounds = int_check("How many rounds (between 5 and 15) would you like: ", 5, 15, 1)

# Game loop starts here
while rounds_played < num_rounds:

    rounds_heading = f"\n⚙️⚙️⚙️ Round {rounds_played + 1} of {num_rounds} ⚙️⚙️⚙️"

    print(rounds_heading)

    # Deciding and generating question
    operator = random.choice(operator_list)
    num1 = random.randint(-12, 12)
    num2 = random.randint(-12, 12)

    #make sure there's no 0 when dividing
    if num1 == 0 and operator == '/':
        num1 = random.randint(1, 12)

    elif num2 == 0 and operator == '/':
        num2 = random.randint(1, 12)

    question = str(num1) + ' ' + operator + ' ' + str(num2) + ' ' + '=' + ' '

    if operator == '/':
        correct_answer = float(round(eval(str(num1) + ' ' + operator + ' ' + str(num2)), 2))

    else:
        correct_answer = int(eval(str(num1) + ' ' + operator + ' ' + str(num2)))

    # Get user input
    user_input = int_check(question, float('-inf'), float('inf'), 0)

    # if user input is 'xxx', end the game
    if user_input == 'xxx':
         break

    if user_input == correct_answer:
        feedback = '✅ Correct! ✅'
        print(feedback)

    else:
        feedback = '❌ Incorrect! ❌'
        print(f'{feedback} The correct answer was: {correct_answer}')

    # Set up round feedback and output it user.
    # Add it to the game history list (include the round number)
    round_feedback = f"You put: {user_input}, {feedback}"
    history_item = f"Round: {rounds_played + 1} - {round_feedback}"

    game_history.append(history_item)

    rounds_played += 1

# Game loop ends here

# Game history

if rounds_played > 0:

    see_history = string_checker("\nDo you want to see your game history? ", yes_no)
    if see_history == "yes":
        for item in game_history:
            print(item)

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