def create_window():
    # Create a window
    # return: a new uagame.Window object
    title = 'Word Puzzle'
    width = 600
    height = 750
    return Window(title,width,height)


def draw_line(window, string, string_coords):

    # Display the string at the position string_coords and update the
    # y coordinate in string_coords to be one 'line' lower
    # - window is the uagame.Window object to draw to
    # - string is the string to display
    # - string_coords is a list containing the x,y int coordinates where
    # the next line should be displayed

    window.draw_string(string, string_coords[0], string_coords[1])
    string_coords[1] += window.get_font_height()


def display_instructions(window, instructions, string_coords):

    # Display the instructions for the game
    # - window is the uagame.Window object to draw to
    # - instructions is a list of strings containing the game's instructions
    # - string_coords is a list containing the x,y int coordinates where
    # the next line should be displayed
    for instruction in instructions:
        draw_line(window, instruction, string_coords)


def display_puzzle_string(window, puzzle, string_coords):

    # Display the current state of the puzzle to the screen.
    # Letters which have been guessed will be revealed.
    # Non-guessed letters will be replaced with underscore
    # characters.
    # - window is the uagame.Window object to draw to
    # - puzzle is a list representing the puzzles current state,
    # each element is either a letter if that letter has been
    # guessed, or an underscore if it has not.
    # - string_coords is a list containing the x,y int coordinates where
    # the next line should be displayed
    progress_message = 'The answer so far is: {}'.format(' '.join(puzzle), string_coords)
    draw_line(window, progress_message, string_coords)