#
#   Hangman version 2: h8.py (Fall 2025, CSCI 1470.1)
#   Two built-in modules may be needed.
import sys
import random

def populate_words(infile_name = 'hangman_words.txt'):
    """
    Read the file infile_name that contains one word per line.
    Strip away any trailing white spaces.
    Return a list of words.
	Write your code below.
    """



#   The number of guesses is set to 13. Captial letters are used for constants.
NUM_GUESSES = 13   

def get_a_word(words):
    """
    Return a random word from words, which is a list of words.
    """
    return random.choice(words)
    
def get_alphabet_from_user(prompt):
    """
    Prompts the user to enter a single alphabetical character and returns it.
    Includes validation to ensure only a single letter is entered.
	Write your code below.
    """


 
def get_yes_no_answer(prompt):
    """ 
        Prompt the user to enter a yes no answer.
        Return True if yes, False if no.
    """
    while True:
        user_input = input(prompt).strip().lower()
        if user_input in ('y', 'yes'):
            return True
        elif user_input in ('n', 'no'):
            return False
        else:
            print("Invalid input. Please enter 'yes' or 'no'.")
            
def play_one_game(word):
    """ Play one hangman game. 
        The parameter word is the answer word.
    """

    hidden_word = "-" * len(word)
    guess = 1
    #   guessed_chars is a set variable to keep track
    #   of what characters have already been guessed.
    guessed_chars = set()

    while guess <= NUM_GUESSES and "-" in hidden_word:
        print(f"The hidden word: {hidden_word}")
		
		#	Use a while loop to get a user input that is a character 
		#	which is not yet guessed before.
        while True:
            user_input = get_alphabet_from_user(f"Enter a character (guess #{guess}): ")
			
			#	Include code to handle character already guessed and 
			#	the update of the set guessed_chars.



        if len(user_input) == 1:
            # Count the number of times the character occurs in the word
            num_occurrences = word.count(user_input)

            # Replace the appropriate position(s) in hidden_word with the actual character.
            position = -1
            for occurrence in range(num_occurrences):
                position = word.find(user_input, position +
                                     1)  # Find the position of the next occurrence
                hidden_word = (hidden_word[:position] + user_input +
                               hidden_word[position + 1:]
                               )  # Rebuild the hidden word string

            guess += 1

    if not "-" in hidden_word:
        print("Winner!", end=" ")
    else:
        print("Loser!", end=" ")

    print(f"The word was {word}.")

def main(): 
    #   Populate the list words by calling populate_words() correctly.
	#	If there are exceptions, exit the program.
    words = []
	#	Write your code here.
    
	
    #   Print a welcome and introduction to the game.
	#	Write your code below.	
    
	
    #  Play games as many times as the user like.
    while True:
		#   Write your code here.


            
    #   print bye message.
    print("\nBye, see you later.")    

if __name__ == "__main__":
    main()