# security_lock_system.gd —— Metin2 40250 仓库 6 位安全密码与贵重装备防丢锁定 1:1
# 对照 40250 服务端 safebox.cpp, input_login.cpp, char.cpp
class_name SecurityLockSystem
extends RefCounted

signal safebox_unlocked()
signal safebox_closed()
signal password_changed(new_pwd: String)
signal item_locked(item_name: String)
signal item_unlocked(item_name: String)

const DEFAULT_SAFEBOX_PASSWORD := "000000"
const PASSWORD_LEN := 6
const CHAR_DELETE_CODE_LEN := 7
const MAX_FAILED_ATTEMPTS := 5

var safebox_password: String = DEFAULT_SAFEBOX_PASSWORD
var is_safebox_unlocked: bool = false
var failed_attempts: int = 0
var is_locked_out: bool = false
var char_delete_code: String = "1234567"

# 验证并开启仓库
func open_safebox(input_pwd: String) -> Dictionary:
	if is_locked_out:
		return {
			"ok": false,
			"reason": "LOCKOUT",
			"msg": "连续输错5次密码，仓库已被暂时锁定！请稍后再试。"
		}

	if input_pwd == safebox_password:
		failed_attempts = 0
		is_safebox_unlocked = true
		safebox_unlocked.emit()
		return {
			"ok": true,
			"msg": "仓库密码验证成功，仓库已开启！"
		}

	failed_attempts += 1
	if failed_attempts >= MAX_FAILED_ATTEMPTS:
		is_locked_out = true
		return {
			"ok": false,
			"reason": "WRONG_PASSWORD_LOCKOUT",
			"failed_attempts": failed_attempts,
			"msg": "密码错误达到上限(5次)，仓库已被安全保护锁定！"
		}

	var remaining := MAX_FAILED_ATTEMPTS - failed_attempts
	return {
		"ok": false,
		"reason": "WRONG_PASSWORD",
		"failed_attempts": failed_attempts,
		"remaining_attempts": remaining,
		"msg": "仓库密码错误！还剩 %d 次尝试机会。" % remaining
	}

# 关闭仓库
func close_safebox() -> void:
	is_safebox_unlocked = false
	safebox_closed.emit()

# 重置防爆保护锁定 (如由 GM 或系统定时重置)
func reset_lockout() -> void:
	is_locked_out = false
	failed_attempts = 0

# 修改仓库 6 位密码
func change_safebox_password(old_pwd: String, new_pwd: String) -> Dictionary:
	if old_pwd != safebox_password:
		return {
			"ok": false,
			"reason": "WRONG_OLD_PASSWORD",
			"msg": "旧密码验证失败，无法修改！"
		}

	if new_pwd.length() != PASSWORD_LEN or not new_pwd.is_valid_int() or int(new_pwd) < 0:
		return {
			"ok": false,
			"reason": "INVALID_PASSWORD_FORMAT",
			"msg": "仓库密码必须为严格 6 位纯数字！"
		}

	if new_pwd == old_pwd:
		return {
			"ok": false,
			"reason": "SAME_PASSWORD",
			"msg": "新密码不能与旧密码相同！"
		}

	safebox_password = new_pwd
	password_changed.emit(new_pwd)

	return {
		"ok": true,
		"new_password": new_pwd,
		"msg": "仓库密码已成功修改！"
	}

# 锁定装备/贵重物品 (防丢锁定)
func lock_item(item: Dictionary, pwd: String) -> Dictionary:
	if pwd != safebox_password:
		return {
			"ok": false,
			"reason": "WRONG_SECURITY_PASSWORD",
			"msg": "安全密码错误，无法加锁！"
		}

	if item.get("is_locked", false):
		return {
			"ok": false,
			"reason": "ALREADY_LOCKED",
			"msg": "该物品已处于锁定状态！"
		}

	item["is_locked"] = true
	var iname = item.get("name", "物品")
	item_locked.emit(iname)

	return {
		"ok": true,
		"item": item,
		"msg": "物品【%s】已安全加锁！" % iname
	}

# 解除物品锁定
func unlock_item(item: Dictionary, pwd: String) -> Dictionary:
	if pwd != safebox_password:
		return {
			"ok": false,
			"reason": "WRONG_SECURITY_PASSWORD",
			"msg": "安全密码错误，无法解锁！"
		}

	if not item.get("is_locked", false):
		return {
			"ok": false,
			"reason": "NOT_LOCKED",
			"msg": "该物品未处于锁定状态！"
		}

	item["is_locked"] = false
	var iname = item.get("name", "物品")
	item_unlocked.emit(iname)

	return {
		"ok": true,
		"item": item,
		"msg": "物品【%s】已解除锁定！" % iname
	}

# 动作权限校验 —— 丢弃到地面
func can_drop_item(item: Dictionary) -> Dictionary:
	if item.get("is_locked", false):
		return {
			"allowed": false,
			"reason": "ITEM_LOCKED",
			"msg": "已加锁的贵重物品无法丢弃！"
		}
	return {"allowed": true}

# 动作权限校验 —— 出售给 NPC
func can_sell_item(item: Dictionary) -> Dictionary:
	if item.get("is_locked", false):
		return {
			"allowed": false,
			"reason": "ITEM_LOCKED",
			"msg": "已加锁的贵重物品无法出售给商人！"
		}
	return {"allowed": true}

# 动作权限校验 —— 彻底销毁
func can_destroy_item(item: Dictionary) -> Dictionary:
	if item.get("is_locked", false):
		return {
			"allowed": false,
			"reason": "ITEM_LOCKED",
			"msg": "已加锁的贵重物品无法直接销毁！"
		}
	return {"allowed": true}

# 动作权限校验 —— 玩家交易
func can_trade_item(item: Dictionary) -> Dictionary:
	if item.get("is_locked", false):
		return {
			"allowed": false,
			"reason": "ITEM_LOCKED",
			"msg": "已加锁的贵重物品无法用于玩家交易！"
		}
	return {"allowed": true}

# 动作权限校验 —— 强化或熔炼消耗
func can_refine_item(item: Dictionary) -> Dictionary:
	if item.get("is_locked", false):
		return {
			"allowed": false,
			"reason": "ITEM_LOCKED",
			"msg": "已加锁的装备无法用于强化或附魔消耗！"
		}
	return {"allowed": true}

# 角色删除 7 位安全码验证 (对照 40250 input_login.cpp)
func verify_character_deletion(input_code: String) -> Dictionary:
	if input_code.length() != CHAR_DELETE_CODE_LEN or not input_code.is_valid_int() or int(input_code) < 0:
		return {
			"ok": false,
			"reason": "INVALID_CODE_FORMAT",
			"msg": "角色删除码必须为严格 7 位纯数字！"
		}

	if input_code != char_delete_code:
		return {
			"ok": false,
			"reason": "WRONG_DELETE_CODE",
			"msg": "角色删除安全码错误！"
		}

	return {
		"ok": true,
		"msg": "角色删除安全码验证通过，允许删除角色。"
	}