extends Control

const TICKS_TIME_MAX = 100 # msec

var current_scene = null
var loader = null
var wait_frames = 1

var database = null

func _ready():
	print("[global#_ready] get root scene")
	_initialize_current_scene()
	_initialize_database()

func goto_scene(path):
	print("[global#goto_scene]")
	loader = ResourceLoader.load_interactive(path)
	if loader == null:
		print("Error loading ....")
		return
	
	set_process(true)
	current_scene.queue_free()
	wait_frames = 1
	Loading.get_node("ColorRect/CenterContainer/VBoxContainer/ProgressBar").set_max(loader.get_stage_count())

func gyroscope_enabled():
	if Input.get_gyroscope():
		return true
	else:
		return false

func _process(_delta):
	print("[global#_process]")
	if loader == null:
		set_process(false)
		return
	
	if wait_frames > 0:
		wait_frames -= 1
	
	var tick = OS.get_ticks_msec()
	
	# Use "TICKS_TIME_MAX" to control for how long we block this thread
	while OS.get_ticks_msec() < tick + TICKS_TIME_MAX:
		var err = loader.poll()
		
		if err == ERR_FILE_EOF: # Finished loading.
			_set_new_scene()
			break
		elif err == OK:
			_update_progress()
		else:
			loader = null
			break

## PRIVATE
func _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 _initialize_database():
	print("[global#_initialize_database]")
	var database_manager = load(gddb_constants.c_addon_main_path + "core/db_man.gd").new()
	var db_id = database_manager.load_database("res://db/ahog.json")
	
	if db_id == gddb_types.e_db_invalid_file:
		print("[global#_initialize_database] Error invalid database file !")
		OS.set_exit_code(1)
	
	if db_id == gddb_types.e_db_invalid_ver:
		print("[global#_initialize_database] Error invalid database version !")
		OS.set_exit_code(1)
	
	database = database_manager.get_db_by_id(db_id)

func _update_progress():
	print("[global#update_progress]")
	Loading.visible = true
	Loading.get_node("ColorRect/CenterContainer/VBoxContainer/ProgressBar").set_value(loader.get_stage())

func _set_new_scene():
	print("[global#set_new_scene]")
	var resource = loader.get_resource()
	loader = null
	current_scene = resource.instance()
	get_node("/root").add_child(current_scene)
	get_node("/root/Loading").hide()