"""Game main module.
   """

from .constants import SCREEN, FREQ, BITSIZE, CHANNELS, BUFFER, DEBUG
from .engine import Engine
from .levelscene import LevelScene
from .menuscene import MenuScene

import pygame
from pygame.locals import SWSURFACE

import sys
import optparse


def parse_args(args):
    parser = optparse.OptionParser()
    parser.add_option("--no-sound", action="store_false", default=True,
            dest="sound", help="disable sound")
    if DEBUG:
        parser.add_option("--level", type="str", default=None,
            dest="level", help="initial level")
        parser.add_option("--no-rects", action="store_false", default=True,
            dest="rects", help="disable debugging rects")
    opts, _ = parser.parse_args(args or [])
    return opts


def main():
    """Launch Nine Tales.
       """
    opts = parse_args(sys.argv)
    pygame.display.init()
    pygame.font.init()
    if opts.sound:
        try:
            pygame.mixer.init(FREQ, BITSIZE, CHANNELS, BUFFER)
        except pygame.error, exc:
            raise
            # TODO: bail out to no_sound(exc)
    else:
        # Ensure get_sound returns nothing, so everything else just works
        # TODO: bail out to disable_sound()
        pass

    pygame.display.set_mode(SCREEN, SWSURFACE)
    #pygame.display.set_icon(pygame.image.load(
    #    data.filepath('icons/nine_tales24x24.png')))
    pygame.display.set_caption("Nine Tales")

    level = getattr(opts, 'level', None)

    engine = Engine()
    if level is not None:
        engine.change_scene(LevelScene(level))
    else:
        engine.change_scene(MenuScene())
    try:
        engine.run()
    except KeyboardInterrupt:
        pass


if __name__ == '__main__':
    main()