class_name BrushTool
extends EditorTool
## Paints a single tile id into a tile layer at (x, y[, z]).
##
## `args`: `layer` (int, default 0), `x` (int), `y` (int), `z` (int,
## default 0), `tile_id` (int).


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


func apply(core: EditorCore, args: Dictionary) -> Variant:
	var layer_idx: int = args.get("layer", 0)
	var x: int = args.get("x", 0)
	var y: int = args.get("y", 0)
	var z: int = args.get("z", 0)
	var tile_id: int = args.get("tile_id", 0)

	if not core.model.is_tile_in_bounds(layer_idx, x, y, z):
		return false

	var old_tile_id: int = core.model.get_tile_raw(layer_idx, x, y, z)
	if old_tile_id == tile_id:
		return false  # no-op -- nothing to undo

	core.undo_redo.begin("Paint tile (%d,%d,%d) -> %d" % [x, y, z, tile_id])
	core.undo_redo.add_do(core.model.set_tile_raw.bind(layer_idx, x, y, z, tile_id))
	core.undo_redo.add_undo(core.model.set_tile_raw.bind(layer_idx, x, y, z, old_tile_id))
	core.undo_redo.commit()
	return true