import pygame
from random import randint

# Load various cutter images
cutter_images_number = 2
cutter_images = ["images/cutter_%02d.png" % cutter_images_number for cutter_images_number in xrange(1, cutter_images_number + 1) ]

class Cutter:
	def __init__(self, screen_w, screen_h, cutter_speed, cut_time_left):
		self.cut_tree = False
		self.speed = cutter_speed
		self.cut_time = cut_time_left
		self.image = pygame.image.load(cutter_images[randint(0, cutter_images_number - 1)])
		image_rect = self.image.get_rect()
		size_reduction = 5
		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.screen_w = screen_w
		self.screen_h = screen_h
		self.x = screen_w/randint(1,4)
		self.y = screen_h/randint(1,4)
		self.position = [ self.x, self.y]

	def update(self):
		image_center = self.image.get_width()/2
		random_number1 = randint(0,3)
		random_number2 = randint(0,3)
		
		if self.cut_tree == False:
			if random_number1 == random_number2: 
				if random_number1 == 0:
					self.position = ((self.position[0] + random_number1 * self.speed + image_center)%self.screen_w - image_center), \
									((self.position[1] + random_number1 * self.speed + image_center)%self.screen_h - image_center)
				elif random_number1 == 1:
					self.position = ((self.position[0] + random_number1 * self.speed + image_center)%self.screen_w - image_center), \
									((self.position[1] - random_number1 * self.speed + image_center)%self.screen_h - image_center)
				elif random_number1 == 2:
					self.position = ((self.position[0] - random_number1 * self.speed + image_center)%self.screen_w - image_center), \
									((self.position[1] - random_number1 * self.speed + image_center)%self.screen_h - image_center)
				elif random_number1 == 3:
					self.position = ((self.position[0] - random_number1 * self.speed + image_center)%self.screen_w - image_center), \
									((self.position[1] + random_number1 * self.speed + image_center)%self.screen_h - image_center)
		

	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 get_absolute_rect(self):
		return self.collision_rect.move(self.position)