# fuel box

name = 'fuelbox'
type = 'gif'

from baseairobj import *
images = []

import random
DX     = -2 * game.groundspeed
DY     = 0.5
TOP    = game.arena.top
BOTTOM = game.groundarena.bottom

FALLING_DY = 1.5

PARACHUTE_AND_BOX = 0
PARACHUTE_ONLY    = 1
BOX_ONLY          = 2

def load_game_resources():
    global images, name, type
    for index in xrange(0,3):
        images.append(gfx.load('%s%d.%s' % (name,index,type)))


class FuelBox(AirObj):
    def __init__(self,x,y):
        global name,images
        self.images = images
        self.state = PARACHUTE_AND_BOX
        self.image = self.images[self.state]

        AirObj.__init__(self,name,self.image)

        self.x = x
        self.y = y
        self.rect.topleft = [self.x,self.y]

        self.dx = DX
        self.dy = DY
        
        self.gravity = game.gravity
        self.friction = game.friction
        self.timer = 0


    def tick(self, speedadjust):
        self.x += self.dx * speedadjust
        self.y += self.dy * speedadjust

        if self.state == BOX_ONLY:
            self.physics

        if self.x < 0 - self.rect.width:
            self.dead = 1

        self.y += self.dy * speedadjust
        if self.y < TOP:
            self.y = TOP
        elif self.y > BOTTOM - self.rect.height: 
            self.y = BOTTOM
            self.exploding = 1

        self.rect.topleft = [self.x,self.y]
        

    # override the collide method since player needs to pick up fuel
    def collide(self,rect):
        if self.rect.colliderect(rect):
            self.collision_timer += -1
            if (self.collision_timer < 0 and
                (self.state == PARACHUTE_AND_BOX or self.state == BOX_ONLY)):
                game.fuel = game.start_fuel
                game.bombs = game.start_bombs
                if self.state == PARACHUTE_AND_BOX:
                    self.changestate(PARACHUTE_ONLY)
                else:
                    self.dead = 1
                return 0
            else:
                return 0
        else:
            return 0

    # override the mark dead method, since a blast blows up the parachute the first time
    def markdead(self):
        """This is done to mark an object dead. Return 0 if object is not dead."""
        if self.state == PARACHUTE_AND_BOX:
            self.changestate(BOX_ONLY)
            self.dy = FALLING_DY
            return 0
        else:
            self.dead = 1
            return self.dead

    def changestate(self,state):
        if state == PARACHUTE_AND_BOX:
            self.state = PARACHUTE_AND_BOX
        elif state == PARACHUTE_ONLY:
            self.state = PARACHUTE_ONLY
        elif state == BOX_ONLY:
            self.state = BOX_ONLY

        self.image = self.images[self.state]

        

    def physics(self):
        self.dy = self.dy * self.friction
        self.dy = self.dy + self.gravity
        
        if self.dx < -game.groundspeed:
            self.dx = -game.groundspeed