'''Game main module.

Contains the entry point used by the run_game.py script.

'''

# Albow looks for stuff in os.path[0], which isn't always where it expects.
# The following horribleness fixes this.
import sys
import os.path
right_path = os.path.dirname(os.path.dirname(__file__))
sys.path.insert(0, right_path)
from optparse import OptionParser

import pygame
from pygame.locals import SWSURFACE
from albow.shell import Shell

from menu import MenuScreen
from gamescreen import GameScreen
from endscreen import EndScreen
from constants import (
    SCREEN, FRAME_RATE, FREQ, BITSIZE, CHANNELS, BUFFER, DEBUG)
from sound import no_sound, disable_sound
import state
import data


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


class MainShell(Shell):
    def __init__(self, display):
        Shell.__init__(self, display)
        self.menu_screen = MenuScreen(self)
        self.game_screen = GameScreen(self)
        self.end_screen = EndScreen(self)
        self.set_timer(FRAME_RATE)
        self.show_screen(self.menu_screen)


def main():
    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:
            no_sound(exc)
    else:
        # Ensure get_sound returns nothing, so everything else just works
        disable_sound()
    if DEBUG:
        if opts.scene is not None:
            # debug the specified scene
            state.DEBUG_SCENE = opts.scene
        state.DEBUG_RECTS = opts.rects
    display = pygame.display.set_mode(SCREEN, SWSURFACE)
    pygame.display.set_icon(pygame.image.load(
        data.filepath('icons/suspended_sentence24x24.png')))
    pygame.display.set_caption("Suspended Sentence")
    shell = MainShell(display)
    try:
        shell.run()
    except KeyboardInterrupt:
        pass