extends Control

## 测试数据：模拟 sect_data 里的嵌套资源（分类 → 子项）
var test_resources := [
	{"name": "粮草", "items": [{"name": "米", "quantity": 10}, {"name": "蔬菜", "quantity": 20}]},
	{"name": "丹药", "items": [{"name": "聚气丹", "quantity": 5}]},
]

func _ready() -> void:
	var tree: Tree = $ScrollContainer/Tree
	tree.hide_root = true        # 隐藏内部根，顶部就是"粮草/丹药"
	tree.columns = 2
	tree.item_selected.connect(_on_item_selected)
	_refresh(tree)
	pass

## 每次数据变化后全量重建（简单可靠）
func _refresh(tree: Tree) -> void:
	tree.clear()
	for category: Dictionary in test_resources:
		var cat_item := tree.create_item()                 # 无父 = 顶级项（挂在隐藏根下）
		cat_item.set_text(0, category["name"])
		cat_item.set_metadata(0, {"type": "category"})
		for sub: Dictionary in category["items"]:
			var item := tree.create_item(cat_item)         # 子项
			item.set_text(0, sub["name"])
			item.set_text(1, str(sub["quantity"]))
			item.set_metadata(0, sub)                      # 存整条数据便于取用

## 动态新增一项后刷新
func _on_add_button() -> void:                              # 测试：手动调一次
	test_resources[0]["items"].append({"name": "灵米", "quantity": 99})
	_refresh($ScrollContainer/Tree)

func _on_item_selected() -> void:
	var tree: Tree = $ScrollContainer/Tree
	var selected := tree.get_selected()
	if selected != null:
		print(selected.get_text(0), " → ", selected.get_metadata(0))