# NetWorld —— 把 M2Client 的网络实体镜像成 Godot 场景节点。
#
# 消费 M2Client 的 entity_spawned / entity_despawned / entity_moved /
# entity_main_set / chat 信号：每个 vid 一个子节点，位置向 client.get_entity(vid).pos
# 平滑逼近，rotation.y 取自 angle_deg，动画状态取自 func（FUNC_*）。
#
# 默认生成「占位胶囊 + 名字牌」（快、无依赖，先跑通同步/插值/状态循环）。
# 要换成真模型：set_model_factory(func(entity_dict) -> Node3D)，返回的节点若有
# set_anim_state(name:String) 方法就会被驱动。
#
# 用法：
#   var nw := preload("res://net_world.gd").new()
#   add_child(nw)
#   nw.setup(m2client, self)            # self = 实体挂载父节点(Node3D)
#   nw.world = metin2_world             # 可选：贴地
#   nw.main_entity_ready.connect(func(node, vid): _cam.target = node)
extends Node

signal entity_added(node: Node3D, vid: int)
signal entity_removed(vid: int)
signal main_entity_ready(node: Node3D, vid: int)
signal chat_line(type: int, vid: int, text: String)
signal fly_targeting(shooter_vid: int, target_vid: int, target_cm: Vector2, append: bool)
signal fishing_event(vid: int, subheader: int, dir: int)
signal motion_event(vid: int, victim_vid: int, motion: int)
signal vitals(vid: int, hp: int, max_hp: int, dead: bool)
signal damage_number(vid: int, amount: int, crit: bool, dodge: bool)

# CInstanceBase::FUNC_*
const FUNC_WAIT := 0
const FUNC_MOVE := 1
const FUNC_ATTACK := 2
const FUNC_COMBO := 3
const FUNC_MOB_SKILL := 4
const FUNC_EMOTION := 5
const FUNC_SKILL := 0x80

# EDamageFlag
const DAMAGE_DODGE := 1 << 2
const DAMAGE_CRITICAL := 1 << 5

# CLIENT-GAP §2.1 two-layer model. The data layer (M2Client / EntityStore) always
# holds every known entity; a scene node under `parent` exists only while the
# entity is visible: it is the main character, force-visible, a wall, or within
# CHAR_STAGE_VIEW_BOUND of the main character.
#   CPythonCharacterManager.cpp:13   -> CHAR_STAGE_VIEW_BOUND = 200*100 (cm; px==cm)
#   PythonCharacterManager.cpp:182   -> cull past (CHAR_STAGE_VIEW_BOUND + 10)
const CHAR_STAGE_VIEW_BOUND := 200 * 100
# CInstanceBase AFFECT enum, ordinal 7 (bit 7) == AFFECT_SHOW_ALWAYS. The 40250
# ClientVS22 tree keeps the enum in AffectFlagContainer.h and does not spell the
# member out; this mirrors the m2dev sibling source (InstanceBase.h) and is the
# force-visible bit checked by CNetworkActorManager::__IsVisibleActor.
const AFFECT_SHOW_ALWAYS := 1 << 7
# CInstanceBase::IsWall race ids (InstanceBase.cpp) — always mirrored regardless
# of distance so map geometry never pops.
const WALL_RACES := [14201, 14202, 14203, 14204]

var client: Node                       # M2Client
var parent: Node3D                     # 实体挂这下面
var world: Node                        # Metin2World（可空，用 sample_height 贴地）
var follow_lerp := 14.0                # 位置逼近速度
var snap_dist := 6.0                   # 超过这么多米直接瞬移（初次出现/大跳）

var _by_vid := {}                      # vid:int -> Node3D
var _main_vid := 0
var _local_vid := 0                    # 由 net_play 设：这个 vid 由本地 player 代表，不生成节点
var _local_node: Node3D                # 本地玩家的真模型（不挂在 _mount 下）
var _model_factory: Callable          # func(Dictionary) -> Node3D
var name_resolver: Callable = Callable()  # func(entity_dict) -> String（怪名走 mob_proto）
var _pvp_relations := {}              # unordered pair key -> {src_vid,dst_vid,mode}
var _duel_opponents := {}             # server-provided duel opponent VID set
var _duel_cannot_attack := false
var _fading := {}                     # vid:int -> true while a culled node tweens out (not re-created until done)

func setup(m2client: Node, mount: Node3D) -> void:
	client = m2client
	parent = mount
	client.entity_spawned.connect(_on_spawn)
	client.entity_despawned.connect(_on_despawn)
	client.entity_main_set.connect(_on_main_set)
	if client.has_signal("entity_info"):
		client.entity_info.connect(_on_info)
	client.chat.connect(func(t, v, s):
		chat_line.emit(t, v, s)
		if t in [0, 3, 4, 6]:   # 普通/队伍/公会/喊话 -> 头顶气泡
			_bubble(int(v), String(s)))
	# entity_moved 不强依赖：_process 每帧统一插值。留个钩子便于调试。
	client.entity_moved.connect(_on_moved)
	client.vitals_changed.connect(_on_vitals)
	client.entity_dead.connect(_on_dead)
	client.damage.connect(_on_damage)
	if client.has_signal("motion"):
		client.motion.connect(_on_motion)
	if client.has_signal("dig_motion"):
		client.dig_motion.connect(_on_dig_motion)
	if client.has_signal("fly_cue"):
		client.fly_cue.connect(_on_fly)
	if client.has_signal("fly_targeting"):
		client.fly_targeting.connect(_on_fly_targeting)
	if client.has_signal("fishing_event"):
		client.fishing_event.connect(_on_fishing_event)
	if client.has_signal("pvp_changed"):
		client.pvp_changed.connect(_on_pvp_changed)
	if client.has_signal("duel_changed"):
		client.duel_changed.connect(_on_duel_changed)

# 已在局内（重连 / setup 是协程，进来时 spawn burst 已被 pump 抽干）——
# 把当前所有实体补建一遍，别漏掉进游戏那一批怪 / NPC / 玩家。
func catch_up() -> void:
	if client == null or not client.has_method("get_entities"):
		return
	for e in client.get_entities():
		var vid := int(e.get("vid", 0))
		if vid != 0 and not _by_vid.has(vid) and vid != _local_vid:
			_on_spawn(e)
	if client.has_method("get_pvp_relations"):
		for relation in client.get_pvp_relations():
			_on_pvp_changed(int(relation.get("src_vid", 0)), int(relation.get("dst_vid", 0)),
					int(relation.get("mode", 0)))
	if client.has_method("get_duel"):
		_on_duel_changed(client.get_duel())

func set_model_factory(f: Callable) -> void:
	_model_factory = f

# 本地玩家用 player_controller 的节点代表，这里就不要再画一个。
func set_local_vid(vid: int) -> void:
	_local_vid = vid
	var n: Node3D = _by_vid.get(vid, null)
	if n:
		_by_vid.erase(vid)
		n.queue_free()

func set_local_node(node: Node3D) -> void:
	_local_node = node

# ClientVS22 destroys the network actor manager when Loading starts. This is
# called from M2Client.world_reset before the replacement connection sends its
# first GC_MAIN_CHARACTER/GC_CHARACTER_ADD burst.
func clear_for_map_change() -> void:
	for vid in _by_vid.keys():
		var node: Node3D = _by_vid[vid]
		if is_instance_valid(node):
			node.queue_free()
		entity_removed.emit(int(vid))
	_by_vid.clear()
	_fading.clear()
	_main_vid = 0
	_pvp_relations.clear()
	_duel_opponents.clear()
	_duel_cannot_attack = false

func node_for(vid: int) -> Node3D:
	return _by_vid.get(vid, null)

func main_node() -> Node3D:
	return _by_vid.get(_main_vid, null)

# ---------------------------------------------------------------------------

func _on_spawn(d: Dictionary) -> void:
	var vid := int(d.get("vid", 0))
	if vid == 0 or vid == _local_vid:
		return
	# §2.1: a node that is blending out is still "present" until the tween frees
	# it — don't rebuild it mid-fade (mirrors GetInstancePtr/UpdateDeleting).
	if _fading.has(vid):
		return
	# §2.3 one-overwrite rule: a fresh Spawn for a VID that already has a node
	# destroys and recreates the node (the data row was whole-replaced). The one
	# exception is a mount / dismount driven rebuild, which keeps the old world
	# position (reference: kCreateData.m_lPosX = oldPos.x; m_lPosY = -oldPos.y —
	# the Y flip is the server<->pixel frame, already applied, so in Godot world
	# space this is just the old node's global_position).
	var keep_pos: Variant = null
	var existing: Node3D = _by_vid.get(vid, null)
	if is_instance_valid(existing):
		var old_mount := int(existing.get_meta("mount_vnum", 0))
		var new_mount := int(d.get("mount_vnum", 0))
		if (old_mount == 0) != (new_mount == 0):
			keep_pos = existing.global_position
		_by_vid.erase(vid)
		existing.queue_free()
	elif not _is_visible_entity(d):
		# §2.1: the data row lives in EntityStore; the scene node is only built
		# once the entity is in view. _update_visibility() creates it later when
		# the main character moves into CHAR_STAGE_VIEW_BOUND.
		return
	var node: Node3D = null
	if _model_factory.is_valid():
		node = _model_factory.call(d)
	if node == null:
		node = _make_placeholder(d)
	elif not node.has_node("Label3D"):
		_attach_nameplate(node, d)   # 真模型也要头顶名字 + HP 条
	node.name = "e_%d" % vid
	parent.add_child(node)
	if keep_pos is Vector3:
		node.global_position = keep_pos
	else:
		node.position = _grounded(d.get("pos", Vector3.ZERO))
	node.set_meta("vid", vid)
	node.set_meta("func", int(d.get("func", FUNC_WAIT)))
	node.set_meta("mount_vnum", int(d.get("mount_vnum", 0)))
	_by_vid[vid] = node
	_refresh_shop_sign(node, str(d.get("shop_sign", "")))
	_refresh_pvp_tag(vid)
	_apply_field_updates(node, d)
	entity_added.emit(node, vid)
	if vid == _main_vid:
		main_entity_ready.emit(node, vid)

# GC_CHAR_ADD_INFO 到了：刷新头顶名字 / HP 上限（节点已存在）。
func _on_info(vid: int, d: Dictionary) -> void:
	var n: Node3D = _by_vid.get(vid, null)
	if n == null:
		return
	var nm := _display_name(d)
	if nm != "":
		if n.has_node("Label3D"):
			(n.get_node("Label3D") as Label3D).text = nm
		elif n.has_method("set_display_name"):
			n.set_display_name(nm)
	_refresh_shop_sign(n, str(d.get("shop_sign", "")))
	_apply_field_updates(n, d)

# §2.5: push the mutable entity fields onto a live view in the exact order the
# reference client uses (CNetworkActorManager refresh -> NetworkActorManager.cpp
# :470): ChangeArmor -> ChangeWeapon -> ChangeHair -> ChangeGuild ->
# SetAffectFlagContainer -> SetMoveSpeed -> SetAttackSpeed -> SetAlignment ->
# SetPKMode -> SetStateFlags. Every setter is optional: the placeholder capsule
# and views that do not model a field simply skip it.
func _apply_field_updates(n: Node3D, d: Dictionary) -> void:
	var parts: Variant = d.get("parts", [])
	if parts is Array and parts.size() >= 3:
		_set_wear_slot(n, "set_armor", 0, int(parts[0]))
		_set_wear_slot(n, "set_weapon", 1, int(parts[1]))
		_set_wear_slot(n, "set_hair", 2, int(parts[2]))
	if n.has_method("set_guild"):
		n.call("set_guild", int(d.get("guild", 0)))
	if n.has_method("set_affect_flags"):
		n.call("set_affect_flags", int(d.get("affect_flags", 0)))
	elif n.has_method("set_affects"):
		n.call("set_affects", int(d.get("affect_flags", 0)))
	if n.has_method("set_move_speed"):
		n.call("set_move_speed", int(d.get("moving_speed", 0)))
	elif n.has_method("set_server_speed"):
		n.call("set_server_speed", int(d.get("moving_speed", 0)))
	if n.has_method("set_attack_speed"):
		n.call("set_attack_speed", int(d.get("attack_speed", 0)))
	if n.has_method("set_alignment"):
		n.call("set_alignment", int(d.get("alignment", 0)))
	if n.has_method("set_pk_mode"):
		n.call("set_pk_mode", int(d.get("pk_mode", 0)))
	if n.has_method("set_state_flags"):
		n.call("set_state_flags", int(d.get("state_flags", 0)))
	# keep the §2.3 mount-toggle rebuild key current
	n.set_meta("mount_vnum", int(d.get("mount_vnum", n.get_meta("mount_vnum", 0))))

func _set_wear_slot(n: Node3D, dedicated: String, slot: int, vnum: int) -> void:
	if n.has_method(dedicated):
		n.call(dedicated, vnum)
	elif n.has_method("set_wear"):
		n.call("set_wear", slot, vnum)

# --- §2.1 per-frame visibility manager ------------------------------------------
# Mirrors CNetworkActorManager::__IsVisibleActor + the CPythonCharacterManager
# cull loop: every data-layer entity is checked each frame; a node is built when
# the entity comes into view and blended out when it leaves. Runs only once the
# main character's position is known (reference cull needs GetMainInstancePtr);
# until then the entity_spawned signal path keeps building nodes as before.
func _update_visibility() -> void:
	if not client.has_method("get_entities") or _main_vid == 0:
		return
	var main: Dictionary = client.get_entity(_main_vid)
	if main.is_empty() or not (main.get("pos_cm", null) is Vector3):
		return
	var mc: Vector3 = main["pos_cm"]
	var main_cm := Vector2(mc.x, mc.y)
	var cull := float(CHAR_STAGE_VIEW_BOUND + 10)
	for e in client.get_entities():
		var vid := int(e.get("vid", 0))
		if vid == 0 or vid == _local_vid or _fading.has(vid):
			continue
		var has_node := _by_vid.has(vid)
		var forced := vid == _main_vid or bool(e.get("is_main", false)) \
				or _show_always(e) or _is_wall(int(e.get("race", 0)))
		var dist := INF
		if e.get("pos_cm", null) is Vector3:
			dist = _planar_cm(e).distance_to(main_cm)
		if forced or dist < CHAR_STAGE_VIEW_BOUND:
			if not has_node:
				_on_spawn(e)
		elif has_node and dist > cull:
			_fade_and_free(vid)

# Distance test used both by the per-frame manager and the _on_spawn gate.
func _is_visible_entity(e: Dictionary) -> bool:
	var vid := int(e.get("vid", 0))
	if vid == _main_vid or bool(e.get("is_main", false)):
		return true
	if _show_always(e) or _is_wall(int(e.get("race", 0))):
		return true
	# Fail open when the data layer can't be queried or the main character has not
	# been located yet — keeps the spawn burst / fake-client tests behaving as
	# before; real gating kicks in once M2Client reports pos_cm + a main vid.
	if client == null or not client.has_method("get_entities") or _main_vid == 0:
		return true
	var main: Dictionary = client.get_entity(_main_vid)
	if main.is_empty() or not (main.get("pos_cm", null) is Vector3) \
			or not (e.get("pos_cm", null) is Vector3):
		return true
	var mc: Vector3 = main["pos_cm"]
	return _planar_cm(e).distance_to(Vector2(mc.x, mc.y)) < CHAR_STAGE_VIEW_BOUND

func _planar_cm(e: Dictionary) -> Vector2:
	var p: Variant = e.get("pos_cm", null)
	return Vector2(p.x, p.y) if p is Vector3 else Vector2.ZERO

func _show_always(e: Dictionary) -> bool:
	return (int(e.get("affect_flags", 0)) & AFFECT_SHOW_ALWAYS) != 0

func _is_wall(race: int) -> bool:
	return race in WALL_RACES

# §2.1 cull: keep the data row, blend the node out. It stays discoverable via
# _fading (so it is not rebuilt mid-blend) until the tween frees it.
func _fade_and_free(vid: int) -> void:
	var n: Node3D = _by_vid.get(vid, null)
	_by_vid.erase(vid)
	if not is_instance_valid(n):
		_fading.erase(vid)
		return
	_fading[vid] = true
	entity_removed.emit(vid)
	var tw := create_tween()
	tw.tween_property(n, "scale", Vector3.ONE * 0.01, 0.3)
	tw.tween_callback(func() -> void:
		if is_instance_valid(n):
			n.queue_free()
		_fading.erase(vid))

func _refresh_shop_sign(root: Node3D, sign: String) -> void:
	var tag := root.get_node_or_null("ShopSign") as Label3D
	var text := sign.strip_edges()
	if text == "":
		if tag:
			tag.queue_free()
		return
	if tag == null:
		tag = Label3D.new()
		tag.name = "ShopSign"
		tag.position.y = 3.0
		tag.billboard = BaseMaterial3D.BILLBOARD_ENABLED
		tag.no_depth_test = true
		tag.pixel_size = 0.0055
		tag.modulate = Color(1.0, 0.82, 0.25)
		tag.outline_size = 8
		root.add_child(tag)
	tag.text = text

func _display_name(d: Dictionary) -> String:
	if name_resolver.is_valid():
		var r: String = name_resolver.call(d)
		if r != "":
			return r
	return str(d.get("name", ""))

func _on_despawn(vid: int) -> void:
	_duel_opponents.erase(vid)
	_fading.erase(vid)
	var n: Node3D = _by_vid.get(vid, null)
	if n:
		_by_vid.erase(vid)
		n.queue_free()
		entity_removed.emit(vid)

func _on_main_set(vid: int) -> void:
	_main_vid = vid
	var n: Node3D = _by_vid.get(vid, null)
	if n:
		main_entity_ready.emit(n, vid)

func _on_moved(_vid: int) -> void:
	pass   # 插值在 _process 里统一做

# GC_MOTION and ServerCommand emotion commands share CRaceMotionData IDs in
# the 40250 client.  Keep the raw event visible to gameplay and ask real PC
# views to play the matching one-shot action; placeholders still retain the
# authoritative motion metadata and state tint.
func _on_motion(vid: int, victim_vid: int, motion: int) -> void:
	var n: Node3D = _by_vid.get(vid, null)
	if n == null and vid == _local_vid:
		n = _local_node
	motion_event.emit(vid, victim_vid, motion)
	if n == null:
		return
	n.set_meta("last_motion", motion)
	n.set_meta("motion_victim_vid", victim_vid)
	var target: Node3D = _by_vid.get(victim_vid, null)
	if target and target != n:
		var flat := target.global_position
		flat.y = n.global_position.y
		if n.global_position.distance_squared_to(flat) > 0.001:
			n.look_at(flat, Vector3.UP)
	var target_race := -1
	if client:
		var target_entity: Dictionary = client.get_entity(victim_vid)
		if not target_entity.is_empty():
			target_race = int(target_entity.get("race", -1))
	var applied := false
	if n.has_method("set_motion_id"):
		applied = bool(n.call("set_motion_id", motion, target_race))
	if not applied:
		var state := "attack"
		if motion >= 305:
			state = "emotion"
		elif motion >= 1 and motion <= 3:
			state = "wait" if motion == 1 else ("walk" if motion == 2 else "run")
		elif motion == 5 or motion == 6 or motion == 8 or motion == 9:
			state = "damage"
		elif motion == 11 or motion == 12:
			state = "dead"
		if n.has_method("set_anim_state"):
			n.call("set_anim_state", state)
		else:
			n.set_meta("motion_state", state)
			if n.has_node("Label3D"):
				(n.get_node("Label3D") as Label3D).modulate = _state_tint(state)

# GC_PVP: 显示当前与任一角色的挑战 / 战斗 / 复仇关系。原客户端同时会影响
# TargetBoard 和名字颜色；这里先提供始终可见的世界标签，避免关系状态无表现。
func _on_pvp_changed(src_vid: int, dst_vid: int, mode: int) -> void:
	if src_vid == 0 or dst_vid == 0:
		return
	var key := _pvp_key(src_vid, dst_vid)
	if mode == 0:
		_pvp_relations.erase(key)
	else:
		_pvp_relations[key] = {"src_vid": src_vid, "dst_vid": dst_vid, "mode": mode}
	_refresh_pvp_tag(src_vid)
	_refresh_pvp_tag(dst_vid)

func _pvp_key(a: int, b: int) -> String:
	return "%d:%d" % [min(a, b), max(a, b)]

func _pvp_mode_for(vid: int) -> int:
	for relation in _pvp_relations.values():
		if int(relation.get("src_vid", 0)) == vid or int(relation.get("dst_vid", 0)) == vid:
			return int(relation.get("mode", 0))
	return 0

func _refresh_pvp_tag(vid: int) -> void:
	var n: Node3D = _by_vid.get(vid, null)
	if n == null:
		return
	var mode := _pvp_mode_for(vid)
	var tag := n.get_node_or_null("PvpTag") as Label3D
	var in_duel := _duel_opponents.has(vid)
	if mode == 0 and not in_duel:
		if tag:
			tag.queue_free()
		return
	if tag == null:
		tag = Label3D.new()
		tag.name = "PvpTag"
		tag.position.y = 2.7
		tag.billboard = BaseMaterial3D.BILLBOARD_ENABLED
		tag.no_depth_test = true
		tag.pixel_size = 0.0045
		n.add_child(tag)
	if in_duel:
		tag.text = "决斗"
		tag.modulate = Color(0.45, 0.85, 1.0)
		return
	match mode:
		1:
			tag.text = "挑战"
			tag.modulate = Color(1.0, 0.85, 0.25)
		2:
			tag.text = "PVP"
			tag.modulate = Color(1.0, 0.25, 0.25)
		3:
			tag.text = "复仇"
			tag.modulate = Color(1.0, 0.45, 0.1)
		_:
			tag.text = "PVP"
			tag.modulate = Color.WHITE

func _on_duel_changed(duel: Dictionary) -> void:
	_duel_opponents.clear()
	_duel_cannot_attack = bool(duel.get("cannot_attack", false))
	for vid in duel.get("opponents", []):
		var opponent := int(vid)
		if opponent != 0:
			_duel_opponents[opponent] = true
	for vid in _by_vid.keys():
		_refresh_pvp_tag(int(vid))

# 头顶聊天气泡（~4s 淡出）。本地玩家 vid 走 main_bubble 信号让上层处理。
signal main_bubble(text: String)

func _bubble(vid: int, text: String) -> void:
	if vid == _local_vid or vid == 0:
		main_bubble.emit(text)
		return
	var n: Node3D = _by_vid.get(vid, null)
	if n == null:
		return
	var old := n.get_node_or_null("bubble")
	if old:
		old.queue_free()
	var lbl := Label3D.new()
	lbl.name = "bubble"
	lbl.text = text
	lbl.position.y = 2.35
	lbl.billboard = BaseMaterial3D.BILLBOARD_ENABLED
	lbl.no_depth_test = true
	lbl.pixel_size = 0.0055
	lbl.modulate = Color(1, 1, 1)
	lbl.outline_size = 6
	n.add_child(lbl)
	var tw := create_tween()
	tw.tween_interval(3.0)
	tw.tween_property(lbl, "modulate:a", 0.0, 1.0)
	tw.tween_callback(lbl.queue_free)

func _on_vitals(vid: int) -> void:
	var n: Node3D = _by_vid.get(vid, null)
	var e: Dictionary = client.get_entity(vid)
	if e.is_empty():
		return
	var hp := int(e.get("hp", 0))
	var max_hp := int(e.get("max_hp", 0))
	var dead := bool(e.get("dead", false))
	vitals.emit(vid, hp, max_hp, dead)
	if n and n.has_node("HpBar") and max_hp > 0:
		var bar := n.get_node("HpBar") as Sprite3D
		bar.scale.x = clampf(float(hp) / float(max_hp), 0.0, 1.0)
		bar.modulate = Color(0.9, 0.2, 0.2) if not dead else Color(0.3, 0.3, 0.3)

func _on_dead(vid: int) -> void:
	var n: Node3D = _by_vid.get(vid, null)
	if n == null:
		return
	# 倒地 + 变灰（服务端随后会发 GC_CHARACTER_DEL 再真正移除）
	var t := create_tween()
	t.tween_property(n, "rotation:x", deg_to_rad(-80.0), 0.3)
	if n.has_method("set_anim_state"):
		n.call("set_anim_state", "dead")

# P6：飞行道具（GC_CREATE_FLY）—— 从 start 实体飞向 end 实体。原客户端在
# GC_CREATE_FLY 之前可能只收到 FLY_TARGETING（target VID=0 时是坐标），所以
# 这里也消费 shooter 的目标队列，避免远端技能没有终点而被静默丢弃。
func _on_fly(_type: int, start_vid: int, end_vid: int) -> void:
	var a: Vector3 = _entity_pos(start_vid)
	var b: Vector3 = _entity_pos(end_vid)
	var shooter: Node3D = _by_vid.get(start_vid, null)
	if b == Vector3.INF and shooter:
		var target: Dictionary = {}
		var queued: Variant = shooter.get_meta("fly_target_queue", [])
		if queued is Array and not queued.is_empty():
			target = queued.pop_front()
			shooter.set_meta("fly_target_queue", queued)
		var target_vid := int(target.get("vid", 0))
		if target_vid != 0:
			b = _entity_pos(target_vid)
		else:
			var target_cm: Variant = target.get("cm", null)
			if target_cm is Vector2:
				b = _server_cm_to_world(target_cm)
	if a == Vector3.INF or b == Vector3.INF or parent == null:
		return
	var proj := MeshInstance3D.new()
	var sm := SphereMesh.new()
	sm.radius = 0.08
	sm.height = 0.16
	proj.mesh = sm
	var mat := StandardMaterial3D.new()
	mat.albedo_color = Color(1.0, 0.9, 0.4)
	mat.emission_enabled = true
	mat.emission = Color(0.9, 0.7, 0.2)
	proj.material_override = mat
	parent.add_child(proj)
	proj.global_position = a + Vector3(0, 1.0, 0)
	var dur := maxf(0.15, a.distance_to(b) / 40.0)
	var tw := create_tween()
	tw.tween_property(proj, "global_position", b + Vector3(0, 1.0, 0), dur)
	tw.tween_callback(proj.queue_free)

# GC_FLY_TARGETING / GC_ADD_FLY_TARGETING — retain the authoritative target on
# the shooter node so a later projectile cue can use it even before a target
# entity exists (target VID 0 carries an explicit coordinate).
func _on_fly_targeting(shooter_vid: int, target_vid: int, target_cm: Vector2, append: bool) -> void:
	var shooter: Node3D = _by_vid.get(shooter_vid, null)
	if shooter:
		var queued: Array = []
		var previous: Variant = shooter.get_meta("fly_target_queue", [])
		if append and previous is Array:
			queued = previous
		queued.append({"vid": target_vid, "cm": target_cm})
		shooter.set_meta("fly_target_queue", queued)
		shooter.set_meta("fly_target_vid", target_vid)
		shooter.set_meta("fly_target_cm", target_cm)
		shooter.set_meta("fly_target_append", append)
	fly_targeting.emit(shooter_vid, target_vid, target_cm, append)

func _server_cm_to_world(cm: Vector2) -> Vector3:
	var p := MapCoord.to_world(Vector3(cm.x * 0.01, 0.0, -cm.y * 0.01))
	if world and world.has_method("sample_height"):
		p.y = float(world.call("sample_height", p.x, p.z)) + 0.6
	else:
		p.y = 0.6
	return p

# 实体世界坐标（Godot 米）；找不到返回 Vector3.INF
func _entity_pos(vid: int) -> Vector3:
	var e: Dictionary = client.get_entity(vid) if client else {}
	if not e.is_empty() and e.get("pos", null) is Vector3:
		return MapCoord.to_world(e["pos"])
	var n = _by_vid.get(vid, null)
	if is_instance_valid(n):
		return (n as Node3D).global_position
	return Vector3.INF

func _on_dig_motion(vid: int, target_vid: int, count: int) -> void:
	var n: Node3D = _by_vid.get(vid, null)
	if n == null:
		return
	n.set_meta("dig_count", count)
	n.set_meta("dig_target_vid", target_vid)
	var target: Node3D = _by_vid.get(target_vid, null)
	if target and target != n:
		var flat := target.global_position
		flat.y = n.global_position.y
		if n.global_position.distance_squared_to(flat) > 0.001:
			n.look_at(flat, Vector3.UP)
	if n.has_method("set_anim_state"):
		n.call("set_anim_state", "dig")

# GC_FISHING: `info` is the fisher VID for motion subheaders. Keep the
# authoritative direction and state on the entity; real PlayerView/MobView
# assets may provide matching fishing animations, while placeholders still
# expose the event to gameplay/UI code.
func _on_fishing_event(subheader: int, info: int, dir: int) -> void:
	# FISH carries an item vnum in `info`, not a fisher VID; leave it to the
	# fishing UI / inventory event consumer.
	if info == 0 or subheader == 5:
		return
	var n: Node3D = _by_vid.get(info, null)
	if n == null:
		return
	n.set_meta("fishing_subheader", subheader)
	n.set_meta("fishing_dir", dir)
	var state := "fishing"
	match subheader:
		1: state = "wait"          # STOP
		2: state = "fishing_react" # REACT
		3: state = "fishing_catch" # SUCCESS
		4: state = "fishing_fail"  # FAIL
	if n.has_method("set_anim_state"):
		n.call("set_anim_state", state)
	fishing_event.emit(info, subheader, dir)

func _on_damage(vid: int, amount: int, flag: int) -> void:
	var crit := (flag & DAMAGE_CRITICAL) != 0
	var dodge := (flag & DAMAGE_DODGE) != 0
	damage_number.emit(vid, amount, crit, dodge)
	var n: Node3D = _by_vid.get(vid, null)
	if n == null or parent == null:
		return
	var lbl := Label3D.new()
	lbl.text = "MISS" if dodge else str(amount)
	lbl.modulate = Color(1.0, 0.85, 0.2) if crit else Color(1, 1, 1)
	lbl.font_size = 48 if crit else 32
	lbl.billboard = BaseMaterial3D.BILLBOARD_ENABLED
	lbl.no_depth_test = true
	lbl.pixel_size = 0.007
	parent.add_child(lbl)
	lbl.global_position = n.global_position + Vector3(randf_range(-0.3, 0.3), 1.9, 0)
	var tw := create_tween()
	tw.set_parallel(true)
	tw.tween_property(lbl, "global_position:y", lbl.global_position.y + 1.2, 0.8)
	tw.tween_property(lbl, "modulate:a", 0.0, 0.8).set_delay(0.3)
	tw.chain().tween_callback(lbl.queue_free)

func _process(dt: float) -> void:
	if client == null or parent == null:
		return
	_update_visibility()
	for vid in _by_vid.keys():
		var n: Node3D = _by_vid[vid]
		if not is_instance_valid(n):
			_by_vid.erase(vid)
			continue
		var e: Dictionary = client.get_entity(vid)
		if e.is_empty():
			continue
		var want := _grounded(e.get("pos", n.position))
		if n.position.distance_to(want) > snap_dist:
			n.position = want
		else:
			n.position = n.position.lerp(want, clampf(follow_lerp * dt, 0.0, 1.0))
		# 朝向：Metin2 heading(度) -> Godot yaw。经验换算，真机再校准。
		var yaw := MapCoord.heading_to_yaw(float(e.get("angle_deg", 0.0)))
		n.rotation.y = lerp_angle(n.rotation.y, yaw, clampf(10.0 * dt, 0.0, 1.0))
		# 动画状态
		var f := int(e.get("func", FUNC_WAIT))
		var moving := bool(e.get("moving", false))
		var walk_mode := int(e.get("walk_mode", 1))
		if f != int(n.get_meta("func", -1)) or moving != bool(n.get_meta("moving", false)) \
				or walk_mode != int(n.get_meta("walk_mode", -1)):
			n.set_meta("func", f)
			n.set_meta("moving", moving)
			n.set_meta("walk_mode", walk_mode)
			_apply_anim(n, f, moving, walk_mode)

func _apply_anim(n: Node3D, f: int, moving: bool, walk_mode := 1) -> void:
	var state := "wait"
	if f == FUNC_MOVE or (f == FUNC_WAIT and moving):
		state = "walk" if walk_mode == 0 else "run"
	elif f == FUNC_ATTACK or f == FUNC_COMBO:
		state = "attack"
	elif f == FUNC_MOB_SKILL or (f & FUNC_SKILL) != 0:
		state = "skill"
	elif f == FUNC_EMOTION:
		state = "emotion"
	if n.has_method("set_anim_state"):
		n.call("set_anim_state", state)
	elif n.has_node("Label3D"):
		(n.get_node("Label3D") as Label3D).modulate = _state_tint(state)

func _state_tint(s: String) -> Color:
	match s:
		"walk": return Color(0.7, 0.9, 1.0)
		"run": return Color(0.6, 1.0, 0.6)
		"attack": return Color(1.0, 0.5, 0.4)
		"skill": return Color(1.0, 0.8, 0.3)
		_: return Color(1, 1, 1)

func _grounded(p: Variant) -> Vector3:
	# p 是 M2Client 的网络帧 pos —— 先转到 Metin2World 本地帧，再贴地。
	var v: Vector3 = MapCoord.to_world(p) if p is Vector3 else Vector3.ZERO
	if world and world.has_method("sample_height"):
		v.y = float(world.call("sample_height", v.x, v.z))
	return v

func _make_placeholder(d: Dictionary) -> Node3D:
	var root := Node3D.new()
	var mesh := MeshInstance3D.new()
	var cap := CapsuleMesh.new()
	cap.radius = 0.35
	cap.height = 1.8
	mesh.mesh = cap
	mesh.position.y = 0.9
	var mat := StandardMaterial3D.new()
	var is_main := bool(d.get("is_main", false))
	mat.albedo_color = Color(0.35, 0.6, 1.0) if is_main else Color(0.85, 0.4, 0.35)
	mesh.material_override = mat
	root.add_child(mesh)
	_attach_nameplate(root, d)
	return root

# 头顶名字 Label3D + HP 条 Sprite3D（占位胶囊和真模型共用）。
func _attach_nameplate(root: Node3D, d: Dictionary) -> void:
	var tag := Label3D.new()
	tag.name = "Label3D"
	var nm := _display_name(d)
	tag.text = nm if nm != "" else "vid %d" % int(d.get("vid", 0))
	tag.position.y = 2.1
	tag.billboard = BaseMaterial3D.BILLBOARD_ENABLED
	tag.no_depth_test = true
	tag.pixel_size = 0.006
	root.add_child(tag)
	var bar := Sprite3D.new()
	bar.name = "HpBar"
	bar.texture = _white_1px()
	bar.pixel_size = 0.01          # 100px -> 1m
	bar.position.y = 1.95
	bar.billboard = BaseMaterial3D.BILLBOARD_ENABLED
	bar.no_depth_test = true
	bar.modulate = Color(0.9, 0.2, 0.2)
	bar.scale.x = 1.0
	root.add_child(bar)

static var _white_tex: Texture2D
static func _white_1px() -> Texture2D:
	if _white_tex == null:
		var img := Image.create(100, 6, false, Image.FORMAT_RGBA8)
		img.fill(Color.WHITE)
		_white_tex = ImageTexture.create_from_image(img)
	return _white_tex