extends Control


var dragging: bool = false
var dragging_start_position: Vector2i = Vector2i()

@onready var dragon: Dragon = $".."


func _ready() -> void:
	set_process_input(true)


func _input(event) -> void:
	if event is not InputEventMouseButton:
		return
	if event.button_index != MOUSE_BUTTON_LEFT:
		return
		
	if event.pressed:
		dragging = true
		dragging_start_position = Vector2i(get_global_mouse_position())
	else:
		dragging = false
		if _is_inside_main_window():
			_destroy_dragon()


func _process(_delta) -> void:
	if dragging:
		dragon.position = dragon.position + Vector2i(get_global_mouse_position()) - dragging_start_position


func _is_inside_main_window() -> bool:
	var id: int = get_window().get_window_id()
	var window_position: Vector2i = DisplayServer.window_get_position(id)
	var window_size: Vector2i = DisplayServer.window_get_size(id)
	var rect: Rect2i = Rect2i(window_position, window_size)
	
	return rect.intersects(dragon.main_window_rect)


func _destroy_dragon() -> void:
	dragon.queue_free()