extends Node

#region Signals
signal live_streamers_updating
signal live_streamers_updated
#endregion

#region Public Variables
var twitcher: TwitcherExtended:
	set(val):
		twitcher = val
		twitcher.streamer_token_validated.connect(_setup_live_stream_timer)

var context: OverlayContext
var settings: OverlaySettings
var main_win: OverlayWindow
var live_streamers: Dictionary[String, TwitchStream] = {}
#endregion

#region Private Variables
var _pt_except: Array[Control] = []
var _pt_mouse: bool = false
var _current_pt_mask: PackedVector2Array = []
var _hull_points: PackedVector2Array = []
var _debug_draw: DebugDraw
var _tmr_live_stream: Timer
#endregion

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	context = OverlayContext.new()
	context.setup()
	
	context.open_db("user://overlay.db")
	# Method one, just create all tables, prevents alterations to existing tables.
	#context.ensure_tables()
	# Method two, use migrations to handle setting up database tables, ensuring that
	# tables can be modified in the future
	context.run_migrations()
	if FileAccess.file_exists("user://settings.tres"):
		settings = load("user://settings.tres")
	else:
		settings = OverlaySettings.new()

func _exit_tree() -> void:
	save_settings()

func _input(_event: InputEvent) -> void:
	if Input.is_action_just_pressed("debug_draw"):
		if _debug_draw:
			_debug_draw.queue_free()
			_debug_draw = null
		else:
			_debug_draw = DebugDraw.new()
			add_child(_debug_draw)

func _setup_live_stream_timer() -> void:
	if _tmr_live_stream:
		return
	_tmr_live_stream = Timer.new()
	_tmr_live_stream.name = "TimerLiveStreamCheck"
	_tmr_live_stream.wait_time = 240
	_tmr_live_stream.one_shot = false
	_tmr_live_stream.timeout.connect(_run_live_streamer_update)
	add_child(_tmr_live_stream)
	
	_run_live_streamer_update()
	
	_tmr_live_stream.start()

func _run_live_streamer_update() -> void:
	live_streamers_updating.emit()
	live_streamers = await twitcher.get_live_streamers_data()
	live_streamers_updated.emit()

func save_settings() -> void:
	ResourceSaver.save(settings, "user://settings.tres")

func clear_mouse_passthrough() -> void:
	DisplayServer.window_set_mouse_passthrough([])

func _update_mouse_passthrough() -> void:
	if not _pt_mouse: return
	var _pt_mask: PackedVector2Array = []
	for node in _pt_except:
		var rect := node.get_global_rect()
		_pt_mask.append_array([
			rect.position,
			Vector2(rect.position.x + rect.size.x, rect.position.y),
			rect.position + rect.size,
			Vector2(rect.position.x, rect.position.y + rect.size.y)
		])
	
	_current_pt_mask = _pt_mask
	var hull_points := Geometry2D.convex_hull(_pt_mask)
	_hull_points = hull_points
	DisplayServer.window_set_mouse_passthrough(hull_points)

func _process(_d: float) -> void:
	if _pt_except.size() == 0: return
	if not _pt_mouse: return
	_update_mouse_passthrough()

func add_to_passthrough_exception(control: Control) -> void:
	if not _pt_except.has(control):
		_pt_except.append(control)
		control.item_rect_changed.connect(_update_mouse_passthrough)

func add_children_to_passthrough_exception(control: Control, ignore: Array[Control] = []) -> void:
	if not _pt_except.has(control):
		_pt_except.append(control)
	for child in control.get_children():
		if child in ignore: continue
		if child.get_child_count() > 0:
			add_children_to_passthrough_exception(child, ignore)
		else:
			_pt_except.append(child)
		child.item_rect_changed.connect(_update_mouse_passthrough)

func remove_from_passthrough_exceptioon(control: Control) -> void:
	if _pt_except.has(control):
		_pt_except.erase(control)
		control.item_rect_changed.disconnect(_update_mouse_passthrough)

func enable_mouse_passthrough() -> void:
	if _pt_mouse:
		return
	
	_pt_mouse = true
	_update_mouse_passthrough()

func disable_mouse_passthrough() -> void:
	if not _pt_mouse:
		return
	
	_pt_mouse = false
	clear_mouse_passthrough()

func get_exception_points() -> PackedVector2Array:
	return _current_pt_mask

func get_polygon_points() -> PackedVector2Array:
	return _hull_points