class_name PalettePanel
extends VBoxContainer
## Catalog-sourced object palette (docs/architecture/editor.md §7.2
## `PalettePanel`). Lists every id in an `EditorObjectCatalog` and emits
## which one the player picked; `InGameEditor` remembers it as the pending
## `catalog_id` for the next `ObjectPlaceTool` placement.

signal object_selected(catalog_id: String)

var _list: ItemList
var _catalog: EditorObjectCatalog = null
var _ids: Array[String] = []


func _init() -> void:
	name = "PalettePanel"


func _ready() -> void:
	var header := Label.new()
	header.text = "Palette"
	add_child(header)

	_list = ItemList.new()
	_list.size_flags_vertical = Control.SIZE_EXPAND_FILL
	_list.item_selected.connect(_on_item_selected)
	add_child(_list)


func set_catalog(catalog: EditorObjectCatalog) -> void:
	_catalog = catalog
	_refresh()


func _refresh() -> void:
	_list.clear()
	_ids.clear()
	if _catalog == null or not _catalog.is_loaded():
		return
	for id in _catalog.get_all_ids():
		var entry := _catalog.resolve(id)
		var label: String = entry.get("display_name", id)
		_list.add_item(label)
		_ids.append(id)


func _on_item_selected(index: int) -> void:
	if index < 0 or index >= _ids.size():
		return
	object_selected.emit(_ids[index])


func get_selected_catalog_id() -> String:
	var selected: PackedInt32Array = _list.get_selected_items()
	if selected.is_empty():
		return ""
	return _ids[selected[0]]