extends RigidBody3D
class_name PackageItem

signal touched()
signal collide(time: float)

@onready var held: bool = false

@onready var last_position: Array[Vector3] = []
@onready var last_collision_count: int = 0

@export var explosion: PackedScene = preload("res://props/explosion/nuke_blast.tscn")
@onready var random_explosion_delay: float = -1.0
const RANDOM_EXPLOSION_CHANCE: float = 1.0 / 50.0

func _init() -> void:
	freeze_mode = RigidBody3D.FREEZE_MODE_STATIC
func _ready() -> void:
	pass

func _physics_process(delta):
	if random_explosion_delay > 0:
		random_explosion_delay -= delta
		if random_explosion_delay <= 0:
			detonate()
			return
	
	if held:
		global_transform.origin = CameraRumble.get_mouse_pos()
		last_position.push_front(global_position)
		last_position.resize(min(last_position.size(), 10))
		linear_velocity = Vector3.ZERO
		
		if not Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT):
			drop()
	
	var collis_count: int = get_colliding_bodies().size()
	if collis_count > last_collision_count:
		emit_signal("collide", 0)
	last_collision_count = collis_count

func _input_event(camera: Camera3D, event: InputEvent, position: Vector3, normal: Vector3, shape_idx: int) -> void:
	if event is InputEventMouseButton:
		if event.button_index == MOUSE_BUTTON_LEFT and event.pressed:
			pickup()

func pickup():
	if held: return
	
	if randf() < RANDOM_EXPLOSION_CHANCE:
		random_explosion_delay = randf_range(0.05,5.0)
	
	#freeze = true
	CameraRumble.emit_signal("grab")
	CameraRumble.holding = true
	held = true
	emit_signal("touched")

func drop():
	if held:
		#freeze = false
		linear_velocity = (last_position[0] - last_position[1]) / get_physics_process_delta_time()
		held = false
		CameraRumble.holding = false

func detonate():
	var blast: Explosion = explosion.instantiate()
	get_parent().add_child(blast)
	blast.global_transform = global_transform
	queue_free()