# soulbound_lock_security_system.gd —— Metin2 40250 神装灵魂绑定与防丢安全锁系统 1:1
# 对照 40250 服务端 char_item.cpp, item.cpp, item_manager.cpp
class_name SoulboundLockSecuritySystem
extends RefCounted

signal item_soulbound(slot: int, item_name: String)
signal unbinding_started(slot: int, item_name: String, duration_seconds: float)
signal unbinding_cancelled(slot: int, item_name: String)
signal item_unbound(slot: int, item_name: String)

const VNUM_SOULBIND_SCROLL   := 72051 # 灵魂绑定卷轴
const VNUM_SOULUNBIND_SCROLL := 72052 # 灵魂解绑卷轴
const DEFAULT_UNBIND_HOURS   := 72.0  # 默认 72 小时解绑安全确认期

# 判定物品是否可在红名死亡时掉落 (灵魂绑定绝对免疫掉落)
static func can_drop_on_death(item: Dictionary) -> bool:
	if item.is_empty():
		return false
	if item.get("is_soulbound", false):
		return false
	return true

# 判定物品是否允许丢弃至地面
static func can_drop_to_ground(item: Dictionary) -> bool:
	if item.is_empty():
		return false
	if item.get("is_soulbound", false):
		return false
	return true

# 判定物品是否允许出售给商店
static func can_sell_to_shop(item: Dictionary) -> bool:
	if item.is_empty():
		return false
	if item.get("is_soulbound", false):
		return false
	return true

# 判定物品是否允许放入摆摊货架或交易
static func can_trade_or_stall(item: Dictionary) -> bool:
	if item.is_empty():
		return false
	if item.get("is_soulbound", false):
		return false
	return true

# 为装备施加灵魂绑定 (72051)
func bind_item(scroll_slot: int, target_slot: int, inventory: Array) -> Dictionary:
	if scroll_slot < 0 or scroll_slot >= inventory.size() or inventory[scroll_slot] == null:
		return {"ok": false, "reason": "INVALID_SCROLL_SLOT"}
	if target_slot < 0 or target_slot >= inventory.size() or inventory[target_slot] == null:
		return {"ok": false, "reason": "INVALID_TARGET_SLOT"}

	var scroll = inventory[scroll_slot]
	var target = inventory[target_slot]

	if int(scroll.get("vnum", 0)) != VNUM_SOULBIND_SCROLL:
		return {"ok": false, "reason": "NOT_A_BIND_SCROLL", "msg": "此物品不是【灵魂绑定卷轴】！"}

	if target.get("is_soulbound", false):
		return {"ok": false, "reason": "ALREADY_SOULBOUND", "msg": "该装备已处于灵魂绑定保护状态！"}

	# 消耗 1 个绑定卷轴
	var cnt = int(scroll.get("count", 1))
	if cnt > 1:
		scroll["count"] = cnt - 1
	else:
		inventory[scroll_slot] = null

	target["is_soulbound"] = true
	target["unbind_remaining_time"] = 0.0

	var iname: String = target.get("name", "神装")
	item_soulbound.emit(target_slot, iname)

	return {
		"ok": true,
		"slot": target_slot,
		"item_name": iname,
		"msg": "【%s】已成功铭刻神龙灵魂烙印！永不掉落、永不遗失！" % iname
	}

# 发起解绑倒计时 (72052)
func start_unbinding(scroll_slot: int, target_slot: int, inventory: Array, duration_hours: float = DEFAULT_UNBIND_HOURS) -> Dictionary:
	if scroll_slot < 0 or scroll_slot >= inventory.size() or inventory[scroll_slot] == null:
		return {"ok": false, "reason": "INVALID_SCROLL_SLOT"}
	if target_slot < 0 or target_slot >= inventory.size() or inventory[target_slot] == null:
		return {"ok": false, "reason": "INVALID_TARGET_SLOT"}

	var scroll = inventory[scroll_slot]
	var target = inventory[target_slot]

	if int(scroll.get("vnum", 0)) != VNUM_SOULUNBIND_SCROLL:
		return {"ok": false, "reason": "NOT_AN_UNBIND_SCROLL", "msg": "此物品不是【灵魂解绑卷轴】！"}

	if not target.get("is_soulbound", false):
		return {"ok": false, "reason": "NOT_SOULBOUND", "msg": "该装备尚未绑定，无需解绑！"}

	if float(target.get("unbind_remaining_time", 0.0)) > 0.0:
		return {"ok": false, "reason": "UNBIND_ALREADY_IN_PROGRESS", "msg": "该装备已在解绑倒计时中！"}

	# 消耗解绑卷轴
	var cnt = int(scroll.get("count", 1))
	if cnt > 1:
		scroll["count"] = cnt - 1
	else:
		inventory[scroll_slot] = null

	var duration_seconds = duration_hours * 3600.0
	target["unbind_remaining_time"] = duration_seconds

	var iname: String = target.get("name", "神装")
	unbinding_started.emit(target_slot, iname, duration_seconds)

	return {
		"ok": true,
		"slot": target_slot,
		"item_name": iname,
		"remaining_seconds": duration_seconds,
		"msg": "【%s】进入解绑安全期，倒计时 %.1f 小时！在此期间随时可取消。" % [iname, duration_hours]
	}

# 取消解绑 (防误操作与防盗号保护)
func cancel_unbinding(target_slot: int, inventory: Array) -> Dictionary:
	if target_slot < 0 or target_slot >= inventory.size() or inventory[target_slot] == null:
		return {"ok": false, "reason": "INVALID_SLOT"}

	var target = inventory[target_slot]
	if float(target.get("unbind_remaining_time", 0.0)) <= 0.0:
		return {"ok": false, "reason": "NO_UNBIND_IN_PROGRESS", "msg": "该装备并未处于解绑流程中。"}

	target["unbind_remaining_time"] = 0.0
	var iname: String = target.get("name", "神装")
	unbinding_cancelled.emit(target_slot, iname)

	return {
		"ok": true,
		"msg": "已终止【%s】的解绑流程，灵魂印记完好无损！" % iname
	}

# 倒计时结束完成解绑
func finalize_unbinding(target_slot: int, inventory: Array) -> Dictionary:
	if target_slot < 0 or target_slot >= inventory.size() or inventory[target_slot] == null:
		return {"ok": false, "reason": "INVALID_SLOT"}

	var target = inventory[target_slot]
	if not target.get("is_soulbound", false):
		return {"ok": false, "reason": "NOT_SOULBOUND"}

	if float(target.get("unbind_remaining_time", 1.0)) > 0.0:
		return {"ok": false, "reason": "COOLDOWN_NOT_FINISHED", "msg": "解绑安全冷却期尚未结束！"}

	target["is_soulbound"] = false
	target["unbind_remaining_time"] = 0.0
	var iname: String = target.get("name", "神装")
	item_unbound.emit(target_slot, iname)

	return {
		"ok": true,
		"msg": "【%s】灵魂烙印消散，已成功解绑！" % iname
	}

# 帧心跳更新解绑倒计时
func update(delta: float, inventory: Array) -> void:
	for item in inventory:
		if item != null and item.get("is_soulbound", false):
			var rem = float(item.get("unbind_remaining_time", 0.0))
			if rem > 0.0:
				item["unbind_remaining_time"] = max(0.0, rem - delta)