@tool
extends Node

## 当任何事件的状态（stage）发生变化时发出此信号。
## 其他系统（如UI、角色状态机等）可以监听此信号来做出反应。
signal stage_updated(event_name: StringName, stage: int)


# 节点初始化时，异步加载并解析事件规则。
func _ready() -> void:
	stage_updated.connect(_on_stage_updated_for_handnote)


# --- 公共 API ---

func get_chapter_stage() -> int:
	return get_stage(&"current_chapter_stage")


func get_stage(event_name: StringName) -> int:
	if not ArchiveManager.archive or ArchiveManager.archive.event_stage == null:
		printerr("[EventManager] Archive or event_stage is null. Cannot get stage for '", event_name, "'.")
		return 0
	return ArchiveManager.archive.event_stage.get(event_name, 0)


# 核心的 stage 设置函数
# default 为 0，首次更新为 1
func set_stage(event_name: StringName, stage := 1) -> void:
	if not ArchiveManager.archive or ArchiveManager.archive.event_stage == null:
		printerr("[EventManager] Archive or event_stage is null. Cannot set stage for '", event_name, "'.")
		return
	ArchiveManager.archive.event_stage[event_name] = stage
	print("[EventManager] Stage updated: %s -> %s" % [event_name, stage])
	stage_updated.emit(event_name, stage)


# 仅当设置的 stage > 当前 stage 时更新
func set_stage_if_greater(event_name: StringName, stage: int) -> bool:
	if stage > get_stage(event_name):
		set_stage(event_name, stage)
		return true
	return false


# stage 最大 99999
func next_stage(event_name: StringName, stage_max := 99999) -> int:
	var current_stage = get_stage(event_name)
	if current_stage < stage_max:
		var new_stage = current_stage + 1
		set_stage(event_name, new_stage)
		return new_stage
	return stage_max


# --- 游戏特定逻辑 ---
func _on_stage_updated_for_handnote(event_name: StringName, stage: int) -> void:
	# 检查条件是否满足
	if not (
		SceneManager.is_node_ready()
		and SceneManager.get_player()
		and SceneManager.get_player().character.begins_with("吕萍")
	):
		return

	if event_name.begins_with("handnote_"):
		# 笔记条目更新
		# 0 初始化隐藏，1 开始显示，2 划掉，3 结束隐藏
		if stage == 1:
			SceneManager.lock_player(3.0, 16, true)
			SceneManager.pop_notification("ui_notify_note_update")


##### 其他事件 #####


func prop_interacted(e_name, prop_key, interacted_times) -> void:
	print("Event: %s interacted with %s. total times: %s" % [e_name, prop_key, interacted_times])