class_name SelectionManager
extends RefCounted
## Tracks the currently-selected object in the in-game editor
## (docs/architecture/editor.md §7.1 `SelectionManager`).
##
## Selection is UI/session state, not chunk data: it is never pushed onto
## `EditorUndoRedoStack` and never encoded into the `ChunkPayload`. Scoped
## to a single selected object id, matching the 2D-tile-editor scope
## (docs/architecture/editor.md §8) -- multi-select is future work.

signal selection_changed(object_id: String)

var _selected_id: String = ""


func select(object_id: String) -> void:
	if _selected_id == object_id:
		return
	_selected_id = object_id
	selection_changed.emit(_selected_id)


func clear() -> void:
	select("")


func get_selected() -> String:
	return _selected_id


func has_selection() -> bool:
	return _selected_id != ""