@tool
class_name Npc2D extends AnimatedSprite2D

signal interacted
signal talk_finished  # 在 unlock player 之前发射

# 常量定义
const SPEAKING_SIGN_FADE_DURATION := 0.3
const SPEAKING_SCALE_MULTIPLIER := 1.3

enum SpeakingSignMode { HIDDEN = 0, SILENT = 1, SPEAKING = 2 }

# 导出变量
@export var snap_to_edge := true
@export var walk_to_edge_width := 25.0
@export var action_key := 4
@export var enabled := true:
	set(val):
		enabled = val
		if is_node_ready():
			_align_signs_status()

@export var sign_mark_height := 10.0:
	set(val):
		sign_mark_height = val
		if is_node_ready() and sign_mark:
			sign_mark.sign_mark_offset.y = -sign_mark_height

@export var speaking_sign_height := 60.0:
	set(val):
		speaking_sign_height = val
		if is_node_ready() and speaking_sign:
			speaking_sign.position.y = -speaking_sign_height

@export var sign_x_offset := 0.0:
	set(val):
		sign_x_offset = val
		if is_node_ready():
			_update_sign_x_positions()

@export var collision_width_and_x := Vector2(20.0, 0):
	set(val):
		collision_width_and_x = val
		if is_node_ready():
			_update_collision_shape()

# DialogueLine 播放 hook_character_name 的对话时，显示 speaking 标志
# 为空时不 hook
@export var hook_character_name := ""

# 节点引用
@onready var speaking_animation = %SpeakingAnimationPlayer
@onready var speaking_sign = %SpeakingSign2D as Node2D
@onready var sign_mark = %Sign as Sign
@onready var sign_snapper = %SignSnapper as SignSnapper
@onready var area2d = %Area2D as Area2D

# 内部变量
var ground_archive: GroundArchive
var icount: int:
	set(val):
		if icount == val:
			return
		icount = val
		if ground_archive:
			ground_archive.set_pair(name, "icount", val)
		_align_signs_status()

var dialogue_title := ""
var dialogue_res = preload("res://asset/dialogue/npc.dialogue")

var base_scale := Vector2.ONE
var base_mod := Color.WHITE_SMOKE
var speaking_sign_tween: Tween
var speaking_sign_mode := SpeakingSignMode.HIDDEN:
	set(val):
		if speaking_sign_mode == val:
			return
		speaking_sign_mode = val
		_update_speaking_sign_mode()

# 强制播放状态管理
var is_hooked := false
var hook_id := 0  # 用于追踪hook会话，避免异步问题


func _ready() -> void:
	_initialize_components()

	if Engine.is_editor_hint():
		_setup_editor_preview()
		return

	_setup_game_mode()
	_align_signs_status()
	DialogueManager.dialogue_ended.connect(_on_dialogue_ended)
	DialogueManager.got_dialogue.connect(_on_got_dialogue)

var _last_line_session := -1

func _on_got_dialogue(line: DialogueLine) -> void:
	if not hook_character_name:
		return
	# 去除 debug
	if line.character.begins_with(GlobalConfig.DEBUG_CHARACTER_PREFIX):
		return
	# 其他角色说话时会自动停止
	if line.character == hook_character_name:
		# 未在 speaking 状态
		if _last_line_session < 0:
			_last_line_session = hook_speaking()
			if GlobalConfig.DEBUG:
				print("[Npc2D] Hook speaking for character: ", hook_character_name, " line.character:", line.character)
	elif _last_line_session >= 0:
		if GlobalConfig.DEBUG:
			print("[Npc2D] Unhook speaking for character: ", hook_character_name, " line.character:", line.character)
		unhook_speaking(_last_line_session)
		_last_line_session = -1


# dialog 结束时会自动 unhook 从 line 播放的 speaking
func _on_dialogue_ended(_res) -> void:
	unhook_speaking(_last_line_session)


func _initialize_components() -> void:
	# 设置标记位置
	if sign_mark:
		sign_mark.sign_mark_offset.y = -sign_mark_height
		sign_mark.position.x = sign_x_offset

	if speaking_sign:
		speaking_sign.position.y = -speaking_sign_height
		speaking_sign.position.x = sign_x_offset
		base_scale = speaking_sign.scale
		base_mod = speaking_sign.modulate
		speaking_sign.modulate.a = 0.0

	# 设置碰撞形状
	_update_collision_shape()

	# 配置 sign_snapper
	if sign_snapper:
		sign_snapper.action_on_arrived = action_key
		sign_snapper.radius = walk_to_edge_width
		sign_snapper.enabled = snap_to_edge


func _setup_editor_preview() -> void:
	if speaking_sign:
		speaking_sign.visible = true
		speaking_sign.modulate.a = 1.0
		var sprite = speaking_sign.get_node_or_null("Sprite2D")
		if sprite:
			sprite.position.x = -60.0
			sprite.frame = 2

	if sign_mark:
		sign_mark.display_sign = true


func _setup_game_mode() -> void:
	# 获取存档数据
	ground_archive = ArchiveManager.archive.ground_archive()
	icount = ground_archive.get_value(name, "icount", 0)

	# 连接信号
	if snap_to_edge and sign_snapper:
		sign_snapper.arrived.connect(_on_interacted)
	elif sign_mark:
		sign_mark.interacted.connect(_on_interacted)

	if sign_mark:
		sign_mark.toggle_active.connect(_on_toggle_active)

	visibility_changed.connect(_on_visibility_changed)

	# 开始动画
	if sprite_frames and animation:
		play()


func _update_sign_x_positions() -> void:
	if speaking_sign:
		speaking_sign.position.x = sign_x_offset
	if sign_mark:
		sign_mark.position.x = sign_x_offset


func _update_collision_shape() -> void:
	if not area2d:
		return

	var collision_shape = area2d.get_node_or_null("CollisionShape2D")
	if collision_shape and collision_shape.shape:
		collision_shape.shape.size.x = collision_width_and_x.x
		area2d.position.x = collision_width_and_x.y


func _update_speaking_sign_mode() -> void:
	if not speaking_sign:
		return

	# 清理之前的补间动画
	if speaking_sign_tween and speaking_sign_tween.is_valid():
		speaking_sign_tween.kill()

	speaking_sign_tween = create_tween()

	match speaking_sign_mode:
		SpeakingSignMode.HIDDEN:
			speaking_sign_tween.tween_property(
				speaking_sign, "modulate:a", 0.0, SPEAKING_SIGN_FADE_DURATION
			)
			if speaking_animation:
				speaking_animation.stop()

		SpeakingSignMode.SILENT:
			speaking_sign_tween.tween_property(
				speaking_sign, "modulate", base_mod, SPEAKING_SIGN_FADE_DURATION
			)
			speaking_sign_tween.parallel().tween_property(
				speaking_sign, "scale", base_scale, SPEAKING_SIGN_FADE_DURATION
			)
			if speaking_animation:
				speaking_animation.play("speaking")

		SpeakingSignMode.SPEAKING:
			speaking_sign_tween.tween_property(
				speaking_sign, "modulate", Color.WHITE, SPEAKING_SIGN_FADE_DURATION
			)
			speaking_sign_tween.parallel().tween_property(
				speaking_sign,
				"scale",
				base_scale * SPEAKING_SCALE_MULTIPLIER,
				SPEAKING_SIGN_FADE_DURATION
			)
			if speaking_animation:
				speaking_animation.play("speaking")


func _on_visibility_changed() -> void:
	_align_signs_status()


func _align_signs_status() -> void:
	if not is_node_ready():
		return
	if Engine.is_editor_hint():
		_setup_editor_preview()
		return
	var is_active = enabled and is_visible_in_tree()
	if sign_mark:
		sign_mark.enabled = is_active
		sign_mark.display_sign = icount == 0
	if speaking_sign:
		speaking_sign.visible = enabled and (icount > 0 or is_hooked)


func _on_toggle_active(activated: bool) -> void:
	# 如果处于hook状态，不响应正常的toggle
	if is_hooked:
		return
	if not activated:
		speaking_sign_mode = SpeakingSignMode.HIDDEN
	elif speaking_sign_mode == SpeakingSignMode.HIDDEN:
		speaking_sign_mode = SpeakingSignMode.SILENT


func _on_interacted() -> void:
	if not dialogue_title:
		return

	# 如果正在hook播放，先取消hook
	if is_hooked:
		_cancel_hook()

	SceneManager.lock_player(0, action_key)
	icount += 1

	if ground_archive:
		ground_archive.set_pair(name, "icount", icount)

	DialogueManager.show_dialogue_balloon(dialogue_res, dialogue_title)
	interacted.emit()

	var was_out_of_range = speaking_sign_mode == SpeakingSignMode.HIDDEN
	speaking_sign_mode = SpeakingSignMode.SPEAKING

	await DialogueManager.dialogue_ended

	speaking_sign_mode = SpeakingSignMode.HIDDEN if was_out_of_range else SpeakingSignMode.SILENT
	talk_finished.emit()
	SceneManager.unlock_player()


# 新增：强制播放说话动画
func hook_speaking() -> int:
	# 强制显示说话气泡动画
	# 返回值：hook会话ID，用于验证unhook的有效性
	is_hooked = true
	hook_id += 1
	var current_hook_id = hook_id

	# 确保speaking_sign可见
	if speaking_sign and not speaking_sign.visible:
		speaking_sign.visible = true

	# 保存当前状态并切换到说话模式
	speaking_sign_mode = SpeakingSignMode.SPEAKING

	return current_hook_id


# 新增：退出强制播放
func unhook_speaking(session_id: int = -1) -> void:
	# 退出强制播放模式
	# 参数：
	# session_id: hook会话ID，如果不匹配则忽略此次unhook
	# 如果已经不在hook状态，或session_id不匹配，则忽略
	if not is_hooked or (session_id != -1 and session_id != hook_id):
		return
	_cancel_hook()


# 新增：内部取消hook的方法
func _cancel_hook() -> void:
	# 内部使用的取消hook方法
	is_hooked = false

	# 恢复到适当的状态
	if sign_mark and sign_mark.activated:
		speaking_sign_mode = SpeakingSignMode.SILENT
	else:
		speaking_sign_mode = SpeakingSignMode.HIDDEN

	# 重新对齐显示状态
	_align_signs_status()


# 新增：检查是否正在hook播放
func is_hook_speaking() -> bool:
	# 返回当前是否处于强制播放状态
	return is_hooked


func _get(property: StringName) -> Variant:
	if property == "dialogue_title":
		return dialogue_title
	return null


func _set(property: StringName, value: Variant) -> bool:
	if property == "dialogue_title":
		dialogue_title = value
		return true
	return false


func _get_property_list() -> Array[Dictionary]:
	var hint_str = ""
	if Engine.is_editor_hint() and dialogue_res:
		hint_str = ",".join(dialogue_res.get_ordered_titles())

	return [
		{
			"name": "dialogue_title",
			"type": TYPE_STRING,
			"hint": PROPERTY_HINT_ENUM_SUGGESTION,
			"hint_string": hint_str
		}
	]