import curses
import time

# Using readlines()
file1 = open("test", "r")
lines = file1.readlines()
debug_text = False


def show_debug_text(stdscr, width, height, start_x_file):
    """debug text for the tomb of doom"""
    whstr = "Width: {}, Height: {}".format(width, height)
    stdscr.addstr(0, 0, whstr, curses.color_pair(1))
    file_string = "X position of text: {}".format(start_x_file)
    stdscr.addstr(1, 0, file_string, curses.color_pair(1))


def draw_scroll(stdscr):
    # Clear and refresh the screen for a blank screen
    # Set delay to no, to not wait for keyboard press
    stdscr.nodelay(1)
    stdscr.clear()
    stdscr.refresh()
    start_x_file = 80
    rotation = 1
    # Start colors in curses
    curses.start_color()
    curses.init_pair(1, curses.COLOR_CYAN, curses.COLOR_BLACK)
    curses.init_pair(2, curses.COLOR_RED, curses.COLOR_BLACK)
    curses.init_pair(3, curses.COLOR_GREEN, curses.COLOR_BLACK)
    curses.init_pair(4, curses.COLOR_BLUE, curses.COLOR_BLACK)
    curses.init_pair(5, curses.COLOR_MAGENTA, curses.COLOR_BLACK)
    curses.init_pair(6, curses.COLOR_YELLOW, curses.COLOR_BLACK)

    while True:
        # Loop where k is the last character pressed
        stdscr.clear()
        height, width = stdscr.getmaxyx()

        # Declaration of strings
        title = "Curses horizontal scroller test"[: width - 1]
        subtitle = "Crunk Varia"[: width - 1]

        hwidth = width // 2
        # Centering calculations
        start_x_title = int((hwidth) - (len(title) // 2) - len(title) % 2)
        start_x_subtitle = int(
            (hwidth) - (len(subtitle) // 2) - len(subtitle) % 2
        )
        start_y = int((height) - 2)
        if debug_text:
            show_debug_text(stdscr, width, height, start_x_file)

        line_count = 0
        for line in lines:
            ch_count = 0
            for character in line:
                if (
                    ch_count + start_x_file < width
                    and ch_count + start_x_file > 0
                ):
                    stdscr.addch(
                        3 + line_count,
                        start_x_file + ch_count,
                        character,
                        curses.color_pair(rotation),
                    )
                ch_count += 1
            line_count += 1

        # Turning on attributes for title
        stdscr.attron(curses.color_pair(2))
        stdscr.attron(curses.A_BOLD)

        # Rendering title
        stdscr.addstr(start_y, start_x_title, title)

        # Turning off attributes for title
        stdscr.attroff(curses.color_pair(2))
        stdscr.attroff(curses.A_BOLD)

        stdscr.addstr(start_y + 1, start_x_subtitle, subtitle)
        # Refresh the screen
        stdscr.refresh()
        time.sleep(1.0 / 30)

        start_x_file -= 1
        if start_x_file < -80:
            start_x_file = 80
            rotation += 1
            if rotation > 6:
                rotation = 1

        key_pressed = stdscr.getch() != -1
        if key_pressed:
            raise KeyboardInterrupt()


def main():
    curses.wrapper(draw_scroll)


if __name__ == "__main__":
    try:
        main()
    except KeyboardInterrupt:
        curses.endwin()
        curses.curs_set(1)
        curses.reset_shell_mode()
        curses.echo()