from hoop import SimObject

class ImprSimObject(SimObject):

    def update(self, interval, world):
        """update an object's physical state for an interval.
        """
        if self.threshold and self.uDelay:
            self.uTimer += interval
            if self.uTimer < self.uDelay:
                return
            else:
                interval = self.uTimer
                self.uTimer -= self.uDelay

        radians = toRadians(self.facing)
        if self.accel:
            dx = math.cos(radians) * self.accel * interval
            dy = math.sin(radians) * self.accel * interval
            print "dx:", dx
            self.velocityX += dx
            self.velocityY += dy

        newPosX = self.posX + (self.velocityX * interval)
        newPosY = self.posY + (self.velocityY * interval)

        if self.turnRate:
            newFacing = self.facing + self.turnRate*interval
            newFacing = newFacing % 360
        else:
            newFacing = self.facing



        moveSuccessful = self.tryMove(world, newPosX, newPosY, self.facing)
        if not moveSuccessful:
            moveSuccessful = self.tryMove(world, newPosX, 0, self.facing)
        if not moveSuccessful:
            moveSuccessful = self.tryMove(world, 0, newPosY, self.facing)

        if self.life:
            self.life -= interval
            if self.life <= 0:
                self.alive = 0

        # calculate the variable delay
        if self.threshold:
            value = max( abs(self.velocityX), abs(self.velocityY), abs(self.turnRate) )
            if value < self.threshold:
                self.uDelay = 1.0 - (value / self.threshold)
            else:
                self.uDelay = 0

        return self.alive

    def tryMove(self, world, newPosX, newPosY, newFacing):
        if world.canMove(self, newPosX, newPosY,newFacing):
            self.posX = newPosX
            self.posY = newPosY
            self.facing = newFacing
            world.move(self, newPosX, newPosY, newFacing)
            self.graphicsObject.setState(newPosX, newPosY, newFacing)
            return 1
        else:
            return 0