# storage tank 1

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

blastimages = []

def load_game_resources():
    global blastimages
    for loop in range(0,4):
        blastimages.append(gfx.load('blast%d.gif'%loop))

class Blast(Sprite):
    def __init__(self,actor):
        global blastimages

        Sprite.__init__(self)

        self.imagenum = 0
        self.maximages = len(blastimages) 
        self.image = blastimages[0]
        self.rect = self.image.get_rect()
        self.lastrect = self.rect

        self.dx = actor.blastspeed
        self.dy = 0

        # where to start firing. 
        # because we add at the end of a cycle, and have to erase-tick-draw...
        self.xoffset = actor.blastoffset[0] - self.dx
        self.yoffset = actor.blastoffset[1] + 0
        
        self.x,self.y = list(actor.rect.topleft)
        self.x += self.xoffset
        self.y += self.yoffset
        self.rect.topleft = [self.x,self.y]

        self.timer = 0
        self.lengthdelay = game.blast_length_delay


    def tick(self, speedadjust):
        self.x += self.dx
        self.y += self.dy
        if self.x > game.arena.right + self.rect.width or self.x < game.arena.left - self.rect.width:
            self.dead = 1
        elif self.y > game.arena.bottom + self.rect.height or self.y < game.arena.top - self.rect.height :
            self.dead = 1
            
        self.rect.topleft = [self.x,self.y]

        # make the laser blast longer by switching images
        if self.imagenum < self.maximages:
            self.timer = (self.timer + 1) % self.lengthdelay
            #print "blast timer: %d" % self.timer
            if self.timer == 0:
                #print "blast imagenum: %d self.maximages:%d" % (self.imagenum,self.maximages)
                if self.imagenum < self.maximages-1:
                    #print "changing blast image"
                    self.imagenum += 1
                    self.image = blastimages[self.imagenum]
                    self.rect = self.image.get_rect()
                    self.rect.topleft = [self.x,self.y]


    def playercollide(self, rect):
        return 0