import random

def int_check(min_value, max_value, prompt):
    """
    Ask the user for an integer between min_value and max_value (inclusive).
    Accepts 'quit' to exit early (returns the string 'quit').
    Keeps prompting until a valid integer is entered.
    """
    while True:
        response = input(prompt).strip()
        if response.lower() == "quit":
            return "quit"

        if response.lstrip("-").isdigit():
            value = int(response)
            if min_value <= value <= max_value:
                return value
            else:
                print(f"Please enter a number between {min_value} and {max_value}.\n")
        else:
            print("That is not a valid whole number. Type a number or 'quit' to stop.\n")


def choose_difficulty():
    """
    Let the user choose difficulty using:
      e = easy
      m = medium
      h = hard
    Returns (name, max_value)
    """
    while True:
        choice = input("Choose difficulty (easy(e), medium(m), hard(h)): ").strip().lower()

        if choice in ("e", "easy"):
            return "easy", 12
        if choice in ("m", "medium"):
            return "medium", 15
        if choice in ("h", "hard"):
            return "hard", 20

        print("Invalid choice. Type e, m, or h.\n")


def ask_question_count():
    """
    Ask how many questions the user wants. Must be between 1 and 10.
    """
    while True:
        response = input("How many questions would you like? (1 to 10): ").strip()
        if response.lower() == "quit":
            return "quit"

        if response.isdigit():
            num = int(response)
            if 1 <= num <= 10:
                return num
            else:
                print("Please enter a number between 1 and 10.\n")
        else:
            print("That is not a valid whole number. Please enter a number between 1 to 10 or type 'quit' to exit.\n")


def show_instructions():
    """
    Display quiz instructions.
    """
    print("\n========== INSTRUCTIONS ==========")
    print("• Choose a difficulty: easy, medium, or hard.")
    print("• You will get random multiplication questions.")
    print("• Type your answer as a whole number.")
    print("• Type 'quit' anytime to exit the quiz.")
    print("• At the end, you can view your question history.")
    print("===================================\n")


def run_quiz():
    print("====================================")
    print("        MULTIPLICATION QUIZ         ")
    print("====================================\n")

    print("Welcome to the Multiplication Quiz!")
    print("You will be given random multiplication questions based on the difficulty you choose.")
    print("Try to get as many correct as you can.")
    print("Type 'quit' at any time to exit.\n")

    # NEW: Ask if user wants instructions
    while True:
        see_instructions = input("Do you want to see the instructions? (yes(y)/no(n)): ").strip().lower()
        if see_instructions in ("y", "yes"):
            show_instructions()
            break
        elif see_instructions in ("n", "no"):
            print("Skipping instructions.\n")
            break
        else:
            print("Invalid option. Please type yes(y) or no(n).\n")

    difficulty, max_rand = choose_difficulty()
    question_num = ask_question_count()

    if question_num == "quit":
        print("No questions selected. Exiting.")
        return

    rounds_played = 0
    score = 0

    min_answer = 2
    max_answer = 400

    history = []  # store question history

    while rounds_played < question_num:
        print(f"\n--- Question {rounds_played + 1} of {question_num} ---")

        random_1 = random.randint(2, max_rand)
        random_2 = random.randint(2, max_rand)
        ans = random_1 * random_2

        user_ans = int_check(min_answer, max_answer, f"What is {random_1} x {random_2} = ")

        if user_ans == "quit":
            print("\nYou chose to quit the quiz early.")
            break

        correct = (user_ans == ans)

        if correct:
            print("You got it!")
            score += 1
        else:
            print(f"The correct answer was {ans}")

        # Save history entry
        history.append({
            "q": f"{random_1} x {random_2}",
            "your_answer": user_ans,
            "correct_answer": ans,
            "result": "Correct" if correct else "Wrong"
        })

        rounds_played += 1

    # FIXED: No division by zero crash
    if rounds_played > 0:
        accuracy = (score / rounds_played) * 100
    else:
        accuracy = 0

    print("\n====================================")
    print("               SUMMARY              ")
    print("====================================")
    print(f"Difficulty: {difficulty}")
    print(f"Questions attempted: {rounds_played}")
    print(f"Score: {score}/{rounds_played}")
    print(f"Accuracy: {accuracy:.1f}%")
    print("====================================\n")

    # Ask if user wants to see history
    while True:
        show_history = input("Do you want to see your question history? (yes(y)/no(n)): ").strip().lower()

        if show_history in ("y", "yes"):
            print("\n========== QUESTION HISTORY ==========")
            for i, entry in enumerate(history, start=1):
                print(f"\nQuestion {i}: {entry['q']}")
                print(f"Your answer: {entry['your_answer']}")
                print(f"Correct answer: {entry['correct_answer']}")
                print(f"Result: {entry['result']}")
            print("\n======================================\n")
            break

        elif show_history in ("n", "no"):
            print("History skipped.\n")
            break

        else:
            print("Invalid option. Please type yes(y) or no(n).\n")


if __name__ == "__main__":
    run_quiz()
    input("Press Enter to exit...")