from os.path import exists, join, basename, normpath, abspath, commonprefix, sep
from sys import argv, version_info

from pygame import mixer, event, time
from pygame.locals import *

if version_info[0] >= 3:
    from . import Game
else:
    import Game

class GameChild:

    def __init__(self, parent=None):
        self.parent = parent
        self.game = self.get_game()

    def get_game(self):
        current = self
        while not isinstance(current, Game.Game):
            current = current.parent
        return current

    def get_configuration(self, section=None, option=None, linebreaks=True):
        config = self.game.configuration
        if option is None and section is None:
            return config
        elif option and section:
            if config.has_option(section, option):
                rvalue = config.get(section, option)
                if not linebreaks and isinstance(rvalue, str):
                    rvalue = rvalue.replace("\n", " ")
                return rvalue
        elif option is None:
            if config.has_section(section):
                return config.get_section(section)
            else:
                return {}

    def get_input(self):
        return self.game.input

    def get_screen(self):
        return self.game.display.get_screen()

    def get_display_surface(self):
        current = self
        attribute = "display_surface"
        while not isinstance(current, Game.Game):
            if hasattr(current, attribute):
                return getattr(current, attribute)
            current = current.parent
        return current.display.get_screen()

    def get_audio(self):
        return self.game.audio

    def get_delegate(self):
        return self.game.delegate

    def get_resource(self, path_or_section, option=None):
        config = self.get_configuration()
        rel_path = path_or_section
        if option is not None:
            rel_path = config.get(path_or_section, option)
        if rel_path:
            for root in config.get("setup", "resource-search-path"):
                if self.is_shared_mode() and not self.is_absolute_path(root):
                    continue
                path = join(root, rel_path)
                if exists(path):
                    return normpath(path)

    def is_shared_mode(self):
        return self.check_command_line("s")

    def check_command_line(self, flag):
        return "-" + flag in argv

    def print_debug(self, statement):
        if self.is_debug_mode():
            print(statement)

    def is_debug_mode(self):
        return self.check_command_line("d")

    def is_absolute_path(self, path):
        return normpath(path) == abspath(path)

    def subscribe(self, callback, kind=None):
        self.game.delegate.add_subscriber(callback, kind)

    def unsubscribe(self, callback, kind=None):
        self.game.delegate.remove_subscriber(callback, kind)