import curses
from time import sleep
from fallout_functions import slowWrite, centeredWrite, NEWLINE, SPACE, addSound

###################### Functions ############################


def makeSelection(scr, SELECTIONS, MSGS):
    """
    ALlow the user to select an option
    Returns the line number of the users selection starting at 0
    """
    inchar = 0
    selection = 0
    selection_count = len(SELECTIONS)
    selection_start_y = scr.getyx()[0]
    width = scr.getmaxyx()[1]

    while inchar not in [NEWLINE, SPACE]:
        # move to start of selections and hightlight current selection
        scr.move(selection_start_y, 0)
        line = 0
        for sel in SELECTIONS:
            whole_line = "> " + SELECTIONS[line]
            space = width - len(whole_line) % width
            whole_line += " " * space

            if line == selection:
                scr.addstr(whole_line, curses.A_REVERSE)
            else:
                scr.addstr(whole_line)
            line += 1
            scr.refresh()

        inchar = scr.getch()

        # move up and down
        if inchar == curses.KEY_UP and selection > 0:
            selection -= 1
            addSound("keyenter")
        elif inchar == curses.KEY_DOWN and selection < selection_count - 1:
            selection += 1
            addSound("keyenter")
    addSound("keyenter")
    if MSGS and MSGS[selection]:
        whole_line = "> " + MSGS[selection]
        space = width - len(whole_line) % width
        whole_line += " " * space
        scr.addstr(" " * width)
        scr.addstr(whole_line)
        scr.refresh()
        sleep(2)
    return selection


def runSelection(scr, CENTERED_HEADERS, OTHER_HEADERS, OPTIONS, MESSAGES):
    """
    Print the selections and allow the user to select one
    """
    curses.use_default_colors()
    scr.erase()
    scr.move(0, 0)
    curses.curs_set(0)
    curses.noecho()

    width = scr.getmaxyx()[1]

    for header in CENTERED_HEADERS:
        centeredWrite(scr, header + "\n")

    for header in OTHER_HEADERS:
        slowWrite(scr, header + "\n")

    for i in range(width):
        scr.addch(curses.ACS_BSBS)
    scr.refresh()

    return makeSelection(scr, OPTIONS, MESSAGES)


def beginSelection(center, other, options, messages=[]):
    """
    Initialize curses and start the boot process
    """
    res = curses.wrapper(runSelection, center, other, options, messages)
    return res