# plane 1

name = 'plane1'
type = 'gif'

import random
from baseairobj import *
from objballoon import Balloon
image = None

BALLOON_INTERVAL = 50

DX_CHANGE_INTERVAL = 100
DY_CHANGE_INTERVAL = 50
XTHRUST     = 0.01
YTHRUST     = 0.01

MAX_DX = 1.5
MIN_DX = -MAX_DX

MAX_DY = 1.5
MIN_DY = -MAX_DY

CHANGE_ACCEL_CHANCE = 0.01

TOP    = game.arena.top
BOTTOM = game.arena.bottom-40

LEFT  = game.arena.left
RIGHT = game.arena.right

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

class Plane1(AirObj):

    # class variables
    max = 4
    count = 0

    def __init__(self, airobjs):
        global name,image
        AirObj.__init__(self,name,image)

        # where to add the balloons
        self.airobjs = airobjs

        self.dx = -1 * game.groundspeed * random.uniform(0.5,1.0)
        self.thrust_change_point = game.arena.width * random.uniform(0.3,1.0)
        self.xthrust = XTHRUST 
        self.ythrust = (random.randrange(0,3) - 1) * YTHRUST * random.random()

        self.timer = 0



    def tick(self, speedadjust):
        self.x += self.dx * speedadjust
        if self.x < game.arena.left - self.rect.width:
            self.dead = 1
        elif self.x > game.arena.right + 2 * self.rect.width :
            self.dead = 1

        self.timer += 1

        if self.timer % DY_CHANGE_INTERVAL == 0:
            sign = random.randrange(0,3) - 1
            self.ythrust = YTHRUST * sign

        if self.timer % DX_CHANGE_INTERVAL == 0:
            if random.random() < CHANGE_ACCEL_CHANCE:
                self.xthrust = 2 * XTHRUST 

        # no thrust until we pass the change point
        if self.x < self.thrust_change_point:
            self.thrust_change_point = 10000
            self.dx += self.xthrust

        if self.x < game.arena.right + self.rect.width:
            self.xthrust = self.xthrust

        self.dy += self.ythrust

        if self.dy > MAX_DY:
            self.dy = MAX_DY
        elif self.dy < MIN_DY:
            self.dy = MIN_DY

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

        self.y += self.dy * speedadjust
        if self.y > BOTTOM: 
            self.y = BOTTOM
            self.dy = 0
            self.ythrust = -YTHRUST

        self.x += self.dx * speedadjust

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


        # add balloons

        if self.timer % BALLOON_INTERVAL == 0:
            if self.dx > -game.groundspeed/2:
                if Balloon.count <= Balloon.max:
                    self.airobjs.append(Balloon(self.x-5,self.y+5,self.dx,self.dy))