import random

# check that users have entered a valid
# option based on a list
def string_checker(question, valid_ans):
    while True:

        error = f"Please enter a valid option from the following list: {valid_ans}"

        # Get the user's 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 the user does not enter something valid
        print(error)
        print()

def instructions():
    """Print instructions"""

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

🎉 Let the math fun begin!

Step 1: Pick how many rounds you want to play.
Step 2: Dive into the game by answering each math question that pops up!

🧠 Rules of the Game:
Only type whole numbers — no letters, emojis, or other funky symbols allowed.

Ready, set, solve! 💥
    """)

# check that users have entered a valid
def int_check(question):
    while True:
        error = "📐🤔 Enter a number (1 or greater) to unlock the next question! 🤔📐"

        to_check = input(question)

        # check for infinite mode
        if to_check == "":
            return "infinite"

        try:
            response = int(to_check)

            # checks that the number is greater than / equal to 13
            if response < 1:
                print(error)

            else:
                return response

        except ValueError:
            print(error)

# Main routine Stars here

# Initialize  game variables
mode = "regular"
round_played = 0
round_lost = 0
rounds_won = 0
yes_no = ["yes","no"]

print(" 𝞹 🧠Multiply Mayhem! 🧠 ✖")
print()

# ask the user if they want instructions (check they say yes / no)
want_instructions = string_checker("Want to see the instructions first? ", yes_no)

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

# Ask user for number of rounds / infinite mde
num_rounds = int_check("How many rounds would you like?")

if num_rounds == "infinite":
    mode = "infinite"
    num_rounds = 5

# Game loop starts here

while round_played < num_rounds:

    # Rounds headings
    if mode == "infinite":
        rounds_heading = f"\n∞ ∞ ∞ Round {round_played + 1} (SECRET) 5 round Mode ∞ ∞ ∞"
    else:
        rounds_heading =f"\n🎓🌍🔎 Round {round_played + 1} of {num_rounds} 🔎🌍🎓"

    print(rounds_heading)

    # generate a random integer between 0 and 10
    random_integer = random.randint(2, 12)
    random_integer2 = random.randint(2, 12)

    answer = random_integer * random_integer2
    while True:
        try:
            user_choice = int(input(f"What is {random_integer} X {random_integer2}? "))

            if user_choice == answer:
                print("🤓✏️ Correct! ✏️🤓")
                error = 'false'
                round_played += 1
                rounds_won += 1
            else:
                error = 'false'
                print(f"✏️😔 Incorrect! 😔✏️ correct answer: {answer}.")
                round_played += 1
                round_lost += 1
        except ValueError:
            error = 'true'
            print("Error! Please enter a valid integer")

        while error == 'true':
            try:
                user_choice = int(input(f"What is {random_integer} X {random_integer2}? "))

                if user_choice == answer:

                    print("🤓✏️ Correct! ✏️🤓")
                    error = 'false'
                    round_played += 1
                    rounds_won += 1
                else:
                    error = 'false'
                    print(f"✏️😔 Incorrect! 😔✏️ correct answer: {answer}.")
                    round_played += 1
                    round_lost += 1
            except ValueError:
                error = 'true'
                print("Error! Please enter a valid integer")

        break

    # Calculate Statistics
percent_won = rounds_won / round_played * 100
percent_lost = round_lost / round_played * 100
print('')
    # Output Game Statistics
print("📊📈💡 Game Statistics 💡📈📊")
print(f"👍 Won: {percent_won:.2f} \t "
      f"😢 Lost: {percent_lost:.2f} \t ")
print('')
print("📚👋 Thanks for playing! 👋📚")