class_name EraseTool
extends EditorTool
## Deletes an object, or clears a tile back to id 0 (the reserved empty/air
## id -- world.md §3.2 / TileDef doc comment).
##
## `args`: either `{"object_id": ...}` to delete an object, or
## `{"layer", "x", "y", "z"}` to clear a tile (delegates to BrushTool with
## `tile_id = 0` so both paths share one undo/redo implementation).


func _init() -> void:
	tool_id = "erase"


func apply(core: EditorCore, args: Dictionary) -> Variant:
	if args.has("object_id"):
		return _erase_object(core, args["object_id"])
	return _erase_tile(core, args)


func _erase_object(core: EditorCore, object_id: String) -> bool:
	var idx: int = core.model.get_object_index(object_id)
	if idx == -1:
		return false
	var obj: ChunkDataDecoder.WorldObjectData = core.model.payload.objects[idx]

	core.undo_redo.begin("Delete '%s'" % object_id)
	core.undo_redo.add_do(core.model.remove_object_raw.bind(object_id))
	core.undo_redo.add_undo(core.model.insert_object_raw.bind(obj, idx))
	core.undo_redo.commit()

	if core.selection.get_selected() == object_id:
		core.selection.clear()
	return true


func _erase_tile(core: EditorCore, args: Dictionary) -> bool:
	var brush: EditorTool = core.tools.get_tool("brush")
	var tile_args: Dictionary = args.duplicate()
	tile_args["tile_id"] = 0
	return bool(brush.apply(core, tile_args))