# Miguel Angel Astor Romero. Created on 7-1-2013. #
###################################################
import pygame

# Valid game states.
VALID_STATES = { 'INTRO':0, 'MENU':1, 'IN_GAME':2, 'SCORE':3, 'STAY':4, 'QUIT':89}

# Parent class for game states.
class BaseState:
    def __init__(self):
        self.background_color = (139, 210, 228)
        self.screen_center = (pygame.display.Info().current_w / 2, pygame.display.Info().current_h / 2)

    def input(self):
        """ Empty. Should handle PyGame input. """
        pass

    def update(self):
        """ Empty. Should update the state. Returns a state to transition to. """
        return VALID_STATES['STAY']

    def render(self, canvas):
        """ Empty. Should render this state on the canvas. """
        canvas.fill(self.background_color)

    def get_screen_center(self):
        return self.screen_center