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()


# Display instructions
def instructions():
    print("""
*** Instructions ****

To begin, choose the number of rounds (you can play between 5 and 20 rounds)
Then, chose your difficulty level from easy (questions between 1 and 5),
medium (questions between 3 and 12) or hard (questions between 10 and 20).

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

Good Luck!
    """)


# Check 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

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

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

# Ask user if they want to see the instructions
want_instructions = string_checker("Do you want to see the instructions? ", yes_no)

# Check users enters yes (y) or no (n) and display them if requested
if want_instructions == "yes":
    instructions()

while True:
    # Initialise game variables
    rounds_played = 0
    answers_correct = 0
    answers_incorrect = 0
    percentage_correct = 0

    game_history = []

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

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

    # Game loop starts here
    while rounds_played < num_rounds:

        # 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)

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

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

        # Identify 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)

        # Set up history and feedback, and add it to the game history list (include the round number)
        history_item = f"Round: {rounds_played + 1} - {first_number} x {second_number} = {user_answer}, {feedback}"

        game_history.append(history_item)

        rounds_played += 1

    # Game loop ends here

    # Game history / Statistics area

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

    # Output game statistics
    print("\n📊📊📊 Game Statistics 📊📊📊")
    print(f"🎮 Difficulty: {difficulty}")
    print(f"✅ Correct answers: {answers_correct} \t "
          f"❌ Incorrect answers: {answers_incorrect} \t "
          f"👍 Accuracy: {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)

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

# Display finishing line
print("Thanks for playing!")