import random

# Check that users have entered a valid answer
# option based on list
def string_checker(question, valid_ans):

    error = "Please enter a valid option from the following list: ", yes_no

    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()

# Displays instructions
def instructions():
    """Print instructions"""

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

To begin, choose the number of rounds (you can play between 5 and 20 rounds)

Then answer the multiplication question. Give it your best go! 
Your game statistics will be published at the end of the game. 

Good Luck!
    """)

# 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)


# Main Routine Starts here

# Game heading
print("\n🔢✏️✖️ Welcome to the multiplication quiz! ✖️✏️🔢")
print()

yes_no = ["yes", "no"]

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

# checks users enters yes (y) or no (n)
if want_instructions == "yes":
    instructions()

while True:
    # Initialise game variables
    mode = "regular"

    rounds_played = 0
    answers_correct = 0
    answers_incorrect = 0
    percentage_correct = 0

    game_history = []

    # Ask user for a number of rounds / infinite mode
    num_rounds = int_checker("How many rounds would you like to play (between 5 and 20)? ", 5, 20)

    # Game loop starts here
    while rounds_played < num_rounds:

        first_number = random.randint(3, 12)
        second_number = random.randint(3, 12)

        # Rounds headings
        rounds_heading = f"\n Round {rounds_played + 1} of {num_rounds}"
        print(rounds_heading)

        # Asks multiplication question
        user_answer = int_checker(f"Question: {first_number} x {second_number} = ", 1, 144)
        print(f"You chose, {user_answer}")

        # Identifies the correct answer
        correct_answer = first_number * second_number

        # Display if answer is correct / incorrect and add results to game history
        if user_answer == correct_answer:
            answers_correct += 1
            feedback ="✅✅✅ Congratulations, that is the correct answer ✅✅✅"
        else:
            answers_incorrect += 1
            feedback = (f"❌❌❌ Sorry, that was an incorrect answer ❌❌❌. "
                        f"\033[1mThe correct answer is {correct_answer} \033[0m")

        print(feedback)

        round_feedback = f"{first_number} x {second_number} = {user_answer}, {feedback}"
        history_item = f"Round: {rounds_played + 1} - {round_feedback}"

        game_history.append(history_item)

        rounds_played += 1

    # Game loop ends here

    # Game history / Statistics area

    # Calculate percentage of correct answers
    percentage_correct = answers_correct / rounds_played * 100

    # Output game statistics
    print("\n📊📊📊 Game Statistics 📊📊📊")
    print(f"✅ Correct answers: {answers_correct} \t "
          f"❌ Incorrect answers: {answers_incorrect} \t "
          f"👍 Percentage correct: {percentage_correct:.2f}%")

    # Ask if user wants game history, if yes display history
    print()
    history = string_checker("Do you want to see your game history? ", yes_no)

    if history == "yes":
        for item in game_history:
            print(item)

    # Allows users to replay entire game
    print()
    restart_game = string_checker("Would you like to play again? ", yes_no)
    if restart_game == "yes":
        continue
    else:
        break

print("Thanks for playing!")