import pygame
from random import randint

fallers_size = 3
fallers = ["images/garbage_%02d.png" % faller_number for faller_number in xrange(1, fallers_size + 1) ]

class Garbage:
	def __init__(self, screen_w, screen_h, unit, garbage_speed, position):
		self.unit = unit
		self.speed = garbage_speed
		self.image = pygame.image.load(fallers[randint(0, fallers_size - 1)])
		self.alert_image = pygame.image.load("images/atention.png")
		image_rect = self.image.get_rect()
		size_reduction = 5*unit
		self.collision_rect = pygame.Rect(image_rect.left + size_reduction, \
											image_rect.top + size_reduction, \
											image_rect.width - size_reduction, \
											image_rect.height - size_reduction)
		self.position = position
		self.screen_w = screen_w
		self.screen_h = screen_h
		self.direction_x = 0
		self.direction_y = 0
	
	def update(self):
		image_center = self.image.get_width()/2
		self.position = [(self.position[0] - randint(0, self.speed) ), \
						(self.position[1] - randint(0, self.speed) ) ]
	
	def collides_with(self, other):
		return self.get_absolute_rect().colliderect(other.get_absolute_rect())
  
	def draw(self, on_surface):
		on_surface.blit(self.image, self.position)
	
	def died_x(self):
		return self.position[0] < 0
		
	def died_y(self):
		return self.position[1] < 0
	
	def draw_alert(self, on_surface):
		on_surface.blit(self.alert_image, self.position)
		
	def get_absolute_rect(self):
		return self.collision_rect.move(self.position)