extends Node3D

@export var debris_scale: float = 0.2
@export var launch_magnitude: float = 5
@onready var debris_sounds: AudioStreamPlayer3D = $DebrisSounds
@onready var fade_out_time = $DebrisSounds.stream.get_length() - 0.05
@onready var default_volume = debris_sounds.volume_db

func generate_debris(demo_site, object_size, material, _mode):
	
	var debris_count: int
	
	##Calculate the amount of debris based on the object type
	if is_instance_of(object_size, TYPE_VECTOR3):
		debris_count = round((object_size.x * object_size.y * object_size.z) / pow(debris_scale,3))
	elif is_instance_of(object_size, TYPE_FLOAT):
		debris_count = round(object_size / pow(debris_scale,3))
	
	#self.global_position = demo_site
	#print("debris generator: " + str(self.position))
	#print("obj_size: " + str(object_size))
	print(debris_count)
	
	##Play the debris sound and tween it so it fades out
	debris_sounds.volume_db = default_volume
	var tween = create_tween()
	##Object, Property, Target Volume (between -60 and -80 in silent), Time
	tween.tween_property(debris_sounds, "volume_db", -60, fade_out_time)
	debris_sounds.play()
	
	##Make the debris generator
	var debris_generator = Node3D.new()
	debris_generator.position = demo_site
	debris_generator.add_to_group("mess")
	get_node("/root").add_child(debris_generator)
	
	##Make the debris
	for i in debris_count:
		#print("making_debris")
		var rigid_debris = RigidBody3D.new()
		##Add debris as child to debris generator
		debris_generator.add_child(rigid_debris)
		##Make it so player is not impeded by debris but debris is moved around by player
		rigid_debris.collision_layer = 2
		rigid_debris.add_child(MeshInstance3D.new())
		rigid_debris.get_child(0).mesh = BoxMesh.new()
		rigid_debris.add_child(CollisionShape3D.new())
		rigid_debris.get_child(1).shape = BoxShape3D.new()
		rigid_debris.get_child(0).mesh.material = material
		for children in rigid_debris.get_children():
			children.scale = Vector3(debris_scale,debris_scale,debris_scale)
		var velocity = Vector3(randf_range(-1,1), randf_range(0,1), randf_range(-1,1)) * launch_magnitude
		var ang_velocity = Vector3(randf_range(-1,1), randf_range(0,1), randf_range(-1,1)) * (launch_magnitude / 2)
		##Direction
		rigid_debris.linear_velocity = velocity
		##Spin
		rigid_debris.angular_velocity = ang_velocity
		
		if i == debris_count - 1:
			pass
			#print("debris instance: " + str(debris_generator.position))
			#print("groups: " + str(debris_generator.get_groups()))