# sprite class - used for most graphic objects

import random
import pygame
from pygame.locals import *
import game, gfx

GROUND_OBJECT    = 'ground'
AIR_OBJECT       = 'air'
UNDEFINED_OBJECT = 'undefined'

class Sprite:
    """Base sprite class - used for most graphic objects;
         subclasses must provide an __init__() function that sets self.image, self.rect, and self.lastrect"""

    # define these variables in your subclass if you want to use them
    max = None       # maximum number of objects on screen - no maximum if None
    count = 0        # number of objects on screen 

    type = UNDEFINED_OBJECT
    bombable = 0

    def __init__(self):
        self.dead = 0
        self.collision_timer = game.collision_timer

        # increment our class' counter
        self.__class__.count += 1

    def erase(self, erase_background_function):
        # note: lastrect must be valid; no check here to save time!
        erase_background_function(self.lastrect)
        if self.dead:
            gfx.dirty(self.lastrect)

    def draw(self, gfx):
        r = gfx.surface.blit(self.image, self.rect)            
        gfx.dirty2(r, self.lastrect)
        self.lastrect = r


    def collide(self,rect):
        if self.rect.colliderect(rect):
            self.collision_timer += -1
            if self.collision_timer < 0:
                return 1
            else:
                return 0
        else:
            return 0


    def die(self):
        """This is done just before removing an object from the lists."""
        self.__class__.count -= 1
        #print "%s dying. count:%d" %(self.__class__.__name__,self.__class__.count)
        return 1
    

    def markdead(self):
        """This is done to mark an object dead. Return 0 if object is not dead."""
        self.dead = 1
        return self.dead