extends RigidBody2D

var SPEED : float
var direction : Vector2
var type:= 1

@export var particles := load("res://scene/destroy.tscn")

@export var asteroidx1 :  = load("res://scene/asteroidx1.tscn")
@export var asteroidx2 :  = load("res://scene/asteroidx2.tscn")
@export var asteroidx3 : = load("res://scene/asteroidx3.tscn")


func _ready() -> void:
	add_to_group("asteroid")
	SPEED = randf() / 50 +50
	rotation = randf_range(0.0, 360.0)

func _process(_delta: float) -> void:
	linear_velocity = direction * SPEED

func split():
	var packed_use: PackedScene

	if type == 1:
		var part = particles.instantiate()
		part.global_position = global_position
		get_parent().call_deferred("add_child", part)
		queue_free()
		return
	elif type == 2:
		packed_use = asteroidx1
	elif  type == 3:
		packed_use = asteroidx2
	elif type == 4:
		packed_use = asteroidx3
	
	var first = packed_use.instantiate()
	var second = packed_use.instantiate()
	var nor = direction.rotated(PI/2).normalized()
	first.direction = direction
	second.direction = direction
	first.global_position = position + (2**type * nor)
	first.type = type-1
	first.set_collision_layer(3)
	second.set_collision_layer(3)
	second.global_position = position - (2**type * nor)
	second.type = type-1
	var parent = get_parent()
	var part = particles.instantiate()
	part.global_position = global_position
	parent.call_deferred("add_child", first)
	parent.call_deferred("add_child", second)
	parent.call_deferred("add_child", part)
	queue_free()

func _on_body_entered(body: Node) -> void:
	if body.is_in_group("asteroid"):
		get_parent()._add_collision(body, self)
	elif body.is_in_group("shoot"):
		body.queue_free()
		split()
	else:
		direction = -direction