extends Projectile

@export var explosion : Resource
@export var blast_radius_area : Node
@export var radius_shape : Node
@export var blast_radius_falloff : Resource


# Called when the node enters the scene tree for the first time.
func _ready():
	blast_radius = radius_shape.shape.radius

func _on_body_shape_entered(body_rid, body, body_shape_index, local_shape_index):
	#move objects
	explode()
	
	#Spawn gpu particles
	var explosionspawn = explosion.instantiate()
	explosionspawn.position = self.global_position
	explosionspawn.transform.basis = self.global_transform.basis
	get_tree().get_root().add_child(explosionspawn)
	queue_free()

func explode():
	#get all collision objects that can be moved
	var bodies_in_blast = blast_radius_area.get_overlapping_bodies()
	#for each object determine vector from center of blast radius
		#apply linear velocity power as the inverse % of distance towards the edge (bonus points if using curve texture)
		#break breakable objects
	for body in bodies_in_blast:
		
		#calculate blast power and direction
		var blast_direction = (body.global_position - blast_radius_area.global_position).normalized()
		var blast_amount = 1 - ((body.global_position - blast_radius_area.global_position).length() / blast_radius)
		var blast_velocity = blast_direction * blast_power * blast_amount
		
		#apply and/or damage
		if body.get_class() == "RigidBody3D":
			if body.has_method("breaking"):
				body.breaking(blast_velocity)
			else:
				body.linear_velocity += blast_velocity
		if body.is_in_group("player"):
			body.velocity += clamp(blast_velocity,Vector3(-7,-7,-7),Vector3(7,7,7))
			body.recoil.add_recoil(Vector3(1,.1,.1),10,10)
		if body.has_method("hit") and !body.is_in_group("player"):
			body.hit(1)
		if body.is_in_group("enemy"):
			if body.has_method("stun"):
				body.stun()