import random


def main():
    heading()
    rand_num = number()
    take_guess(rand_num)


# This function shows the greetings
def heading():
    print("Welcome to the my guessing game!\n")


# This function generates the random number and displays it
def number():
    number = random.randint(1, 100)
    print("(The answer is ", number, ")", sep="")

    return number


# This function performs the logic required to keep track of the
# guesses in addition to calling other functions that perform
# checks for the boundaries
def take_guess(rand_num):
    start = 1
    end = 100
    counter = 0
    guess = 0
    flag = True

    while flag:
        # TODO:
        # When an error is triggered, display only the exception
        # error prompt according to the requirement
        try:
            guess = int(input("Please guess a number between "
                              + str(start) + " and " + str(end) + ": "))
        except ValueError:
            print("Your guess must be a number.\n")

        # This function call checks if the user is outside the
        # boundaries and keeps track of guesses
        # if within boundaries
        proceed = boundary_check(guess, start, end, counter)
        if proceed != -1:
            counter += 1

        # This function call takes in the start and end
        # boundaries, the guess, the random number, guess
        # counter, and continues if proceed isn't -1

        # here you set new_bound but never passed end so that it can be changed
        new_bound, new_end = high_low(start, end, guess, rand_num, proceed, counter)
        start = new_bound
        end = new_end

        if start == -1:
            flag = False


# This function checks the boundaries and returns the proceed
# code in which case -1 means "don't proceed".


def boundary_check(guess, start, end, counter):
    if guess < start or guess > end:
        print("Your guess must be between " + str(start) +
              " and " + str(end), "\n")
        return -1

    else:
        counter += 1
        return counter


# This function calculates if the guess is high or low and
# resets the boundary based on the calculation

# added end so that it can also be changed.
def high_low(start, end, guess, rand_num, proceed, counter):
    if proceed != -1:
        if guess < rand_num:
            print("Too low!\n")
            start = guess

        elif guess == rand_num:
            print("You guessed it!")
            print("It only took you", counter, "guess(es)!\n")
            start = -1
            play_again()

        elif guess > rand_num:
            end = guess
            print("Too high!\n")

    return start, end


# This function ensures the user types the requested string to
# play again or quit
def play_again():
    flag = True

    while flag:
        again = input(str("Play again? (Y/N): "))
        if again == "Y" or again == "y":
            flag = False
            main()

        elif again == "N" or again == "n":
            flag = False

        else:
            print("The only valid choices are (Y/N)\n")


# TODO:
# Thank the user for playing
# display the user's best round

main()