@tool
extends TextureRect

@onready var subview = $Viewport
@onready var camera = $Viewport/Camera2D
var scene : Node

func set_path(path):
	if scene:
		scene.queue_free()
	if ResourceLoader.exists(path) == false:
		return
	var packed_scene : PackedScene = load(path)
	render_scene(path, packed_scene)
	

func render_scene(path: String,packed : PackedScene):
	scene = packed.instantiate()
	subview.add_child(scene)
	
	var bb = get_bounding_box(scene)
	subview.size = Vector2(max(bb.size.x,bb.size.y),max(bb.size.x,bb.size.y))

	camera.position = bb.position * Vector2(0.5,0.5)
	
	var vtexture : ViewportTexture = subview.get_texture()
	texture = vtexture
	

func get_bounding_box(root: Node2D) -> Rect2:
	var rect := Rect2();
	var children := root.get_children();
	while children:
		var child = children.pop_back();
		children.append_array(child.get_children());
		
		if child.has_method('get_rect') and child.has_method('to_global'):
			var child_rect := child.get_rect() as Rect2;
			child_rect.position = child.to_global(child_rect.position);
			rect = rect.merge(child_rect);
			
	return rect;