extends Node2D

export (PackedScene) var Apple
export (PackedScene) var Bomb
export var w = 96
var rnd = RandomNumberGenerator.new()
var screen_size
var born_rate = 100
var born_enable = false

func _ready():
	rnd.randomize()
	screen_size = get_viewport_rect().size
	born_rate = 100
	born_enable = false
	
	start()  # Delete in production environment

func start():
	born_enable = true
	born_rate = 100

func stop():
	born_enable = false

func generate_item():
	if born_enable:
		var x0 = w / 2
		var x1 = screen_size.x - (w / 2)
		var x = rnd.randi_range(x0, x1)
		var item
		if rnd.randi_range(0, 100) > max(20, born_rate):
			item = Bomb.instance()
		else:
			item = Apple.instance()
		item.position.x = x
		item.position.y = -w
		$Items.add_child(item)
	
func update_rate():
	if born_enable:
		born_rate -= 3
		if born_rate <= 1:
			born_rate = 100