# tank 1

import game
from basegroundobj import *
import objrocket

XACCEL = 0.22
FRICTION = 0.97

# min space between player and tank
GUARD_DIST = 40

MAX_DX = game.groundspeed * 5
MIN_DX = -game.groundspeed * 1.5

# where rocket appears
ROCKET_OFFSET_X = 5
ROCKET_OFFSET_Y = -4

# how long between rocket launches
LAUNCH_INTERVAL = 300

# how many total rockets do we have
ROCKETS = 5

name = 'tank1'
type = 'gif'

image = None

def load_game_resources():
    global image, name
    image = gfx.load('%s.%s' % (name,type))


class Tank1(GroundObj):

    # class variables
    max = 1
    count = 0

    def __init__(self,airobjectlist,exhaustobj,launch_interval=LAUNCH_INTERVAL, rockets=ROCKETS, *extra_rocket_params):
        global name,image
        self.images = image
        GroundObj.__init__(self,name,image)

        self.airobjectlist = airobjectlist
        self.exhaustobj = exhaustobj

        self.launch_interval = launch_interval
        self.rockets = rockets

        #print "extra rocket params:",extra_rocket_params
        self.extra_rocket_params = extra_rocket_params

        self.xaccel = XACCEL

        self.rocket_offset_x = ROCKET_OFFSET_X 
        self.rocket_offset_y = ROCKET_OFFSET_Y 
        self.timer = 0


    def tick(self, speedadjust):

        self.timer += 1
        if self.timer % self.launch_interval == 0:
            self.launch()

        if self.rect.left < game.player.rect.right + GUARD_DIST:
            self.dx += self.xaccel
        elif self.rect.left < game.player.rect.right + 2 * GUARD_DIST:
            self.dx += 0
        else:
            self.dx += -self.xaccel

        self.dx = ((self.dx + game.groundspeed) * FRICTION) - game.groundspeed

        if self.dx < MIN_DX:
            self.dx = MIN_DX
        elif self.dx > MAX_DX:
            self.dx = MAX_DX

        self.x += self.dx * speedadjust

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

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



    def launch(self):
        if self.rockets > 0:
            self.rockets -= 1
            #print "making rocket: ", self.extra_rocket_params
            self.airobjectlist.append(apply(objrocket.Rocket,
                                            (self.x+self.rocket_offset_x,self.y+self.rocket_offset_y,
                                             self.exhaustobj) + self.extra_rocket_params))