import random


# 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 it's lowercase
        user_response = input(question).lower()

        for var_item in valid_ans:
            # check if the user response is a word in the list
            if var_item == user_response:
                return var_item

            # check if the user response is the same as
            # the first letter of an item in the list
            elif user_response == var_item[0]:
                return var_item

        # print error if user does not enter something that is valid
        print(error)
        print()


# Displays instructions
def instruction():
    print("""

**** 🧻Instructions🧻 ****

To begin, choose your difficulty level, choose either easy (0-5 times table) or hard (6-12 times table).
Then pick the number of rounds you would like to play (5-15 rounds only)

The computer will give you a random multiplication problem and you have to answer it. 
Answer the questions in integers, (full numbers) only.
Once finished you will receive your score!

Good Luck!👍
    """)


# checks for an integer more than 5 and less than 15
def int_check(question):
    while True:
        invalid = "Invalid integer please try again!"

        to_check = input(question)

        try:
            response = int(to_check)

            # checks that the number is more than / equal to 1
            if response < 5:
                print(invalid)
            elif response > 15:
                print(invalid)
            else:
                return response

        except ValueError:
            print(invalid)


# Main Routine Starts here
# Intialise game variables
mode = "regular"

rounds_played = 0
rounds_lost = 0
yes_no = ["yes","no"]
difficulty_lvl = ["easy", "hard"]
# Game Heading - game play starts here
print("✖️𝙈𝙪𝙡𝙩𝙞𝙥𝙡𝙞𝙘𝙖𝙩𝙞𝙤𝙣 𝙌𝙪𝙞𝙯!✖️")
print()

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

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

#ask for difficulty setting
difficulty = string_checker (" Choose your difficulty level (Easy or Hard) ", difficulty_lvl)

#checks difficulty
if difficulty == "easy":
    low_int = 0
    high_int = 5
elif difficulty == "hard":
    low_int = 6
    high_int = 12
print(f'You picked {difficulty}')
# Ask user for number of rounds
num_rounds = int_check("Please enter the number of rounds you would like to play! Integers between 5 and 15 only: ")

# Game loop starts here
while rounds_played < num_rounds:

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

    print(rounds_heading)

    # Generate two random numbers
    random_integer_1 = random.randint(low_int,high_int)
    random_integer_2 = random.randint(low_int, high_int)
    # multiply the two random numbers and store the answer
    answer = random_integer_1 * random_integer_2
    # compares the users input to the stored answer and outputs a response accordingly
    while True:
        try:
            user_choice = int(
                input(f"What is {random_integer_1} X {random_integer_2}? "))

            if user_choice == answer:
                print("👍👍 Correct! 👍👍")
                error = 'false'
            else:
                rounds_lost += 1
                error = 'false'
                print(f"Incorrect, correct answer: {answer}.")

        except ValueError:
            error = 'true'
            print("❗Error! Please enter a valid integer❗")
        # In the instance of a value error re-run the code until the error is resolved
        while error == 'true':
            try:
                user_choice = int(
                    input(
                        f"What is {random_integer_1} X {random_integer_2}? "))

                if user_choice == answer:
                    print("👍👍 Correct! 👍👍")
                    error = 'false'
                else:
                    error = 'false'
                    rounds_lost += 1
                    print(f"Incorrect 😭, correct answer: {answer}.")

            except ValueError:
                error = 'true'
                print("❗Error! Please enter a valid integer❗")

        break

    # increase number of rounds played.
    rounds_played += 1

# Game loop ends here

# Game History / Statistics area

if rounds_played > 0:
    # Calculate Statistics
    rounds_won = rounds_played - rounds_lost
    percent_won = rounds_won / rounds_played * 100
    percent_lost = rounds_lost / rounds_played * 100

    # Output Game Statistics
    print("📊📊📊 Game Statistics 📊📊📊")
    print(f"👍 Correct: {percent_won:.2f}% \t "
          f"😢 Incorrect: {percent_lost:.2f}% \t ")
    print()
    print("Thanks for playing.")