extends Control

@onready var current_scene = null
@onready var current_scene_int = null
@onready var wait_frames = 1
@onready var database = null
@onready var loaded = false
@onready var animation = Loading.get_node("AnimLoading")

var _loading_path: String = ""

func _ready():
	database = load("res://scripts/Database.gd").new().initialize()

	_initialize_current_scene()
	_initialize_loading_scene()

func _initialize_loading_scene():
	animation.connect("animation_started", Callable(Event, "_loading_is_started"))
	animation.connect("animation_finished", Callable(Event, "_loading_is_finished"))

func goto_scene(path):
	print("[global#goto_scene] : load scene " + str(path))
	var err = ResourceLoader.load_threaded_request(path)
	if err != OK:
		print("Error loading ....")
		return

	_loading_path = path
	Loading.show()
	animation.play("BorderAnim")

	set_process(true)
	current_scene.queue_free()
	wait_frames = 1
	Loading.get_node("LoadingBare/VBoxContainer/HBoxContainer/ProgressBar").set_max(1.0)

func _process(_delta):
	if _loading_path == "":
		set_process(false)
		return

	if wait_frames > 0:
		wait_frames -= 1

	if not loaded:
		return

	var progress := []
	var status = ResourceLoader.load_threaded_get_status(_loading_path, progress)
	match status:
		ResourceLoader.THREAD_LOAD_IN_PROGRESS:
			_update_progress(progress[0] if progress.size() > 0 else 0.0)
		ResourceLoader.THREAD_LOAD_LOADED:
			_set_new_scene()
		ResourceLoader.THREAD_LOAD_FAILED, ResourceLoader.THREAD_LOAD_INVALID_RESOURCE:
			print("Error loading ....")
			_loading_path = ""

## PRIVATE
func _initialize_current_scene():
	print("[global#_initialize_current_scene]")
	var root = get_tree().get_root()
	current_scene = root.get_child(root.get_child_count() - 1)

	if current_scene.name != "Main":
		get_node("/root/Loading").hide()

func _update_progress(value: float):
	Loading.visible = true
	Loading.get_node("LoadingBare/VBoxContainer/HBoxContainer/ProgressBar").set_value(value)

func _set_new_scene():
	var resource = ResourceLoader.load_threaded_get(_loading_path)
	_loading_path = ""
	current_scene = resource.instantiate()
	get_node("/root").add_child(current_scene)
	Loading.hide()