import { DEFAULT_LANG } from "@/constants/i18n.constants";
import { I18N_EN_US } from "@/constants/i18n-locales/en-us";
import { I18N_ZH_HK } from "@/constants/i18n-locales/zh-hk";
import { I18N_ZH_CN } from "@/constants/i18n-locales/zh-cn";
import { I18N_ZH_TW } from "@/constants/i18n-locales/zh-tw";

export const I18N_FALLBACK_BUNDLES: Record<string, Record<string, string>> = {
  "zh-cn": I18N_ZH_CN,
  "zh-tw": I18N_ZH_TW,
  "zh-hk": I18N_ZH_HK,
  "en-us": I18N_EN_US,
};

const normalizeBundleLang = (lang: string): string => {
  const source = (lang || "").trim();
  if (!source) return "zh-cn";
  const normalized = source.replaceAll("_", "-");
  const lower = normalized.toLowerCase();

  // bundle key 统一收敛为本地词包文件名使用的小写语言 key。
  if (lower === "zh-cn" || lower === "zh-hans") return "zh-cn";
  if (lower === "zh-tw" || lower === "zh-hant") return "zh-tw";
  if (lower === "zh-hk") return "zh-hk";
  if (lower === "en-us" || lower === "en") return "en-us";
  if (lower.startsWith("zh-hans")) return "zh-cn";
  if (lower.startsWith("zh-cn")) return "zh-cn";
  if (lower.startsWith("zh-hant-hk")) return "zh-hk";
  if (lower.startsWith("zh-hk")) return "zh-hk";
  if (lower.startsWith("zh-hant")) return "zh-tw";
  if (lower.startsWith("zh-tw")) return "zh-tw";
  if (lower.startsWith("en-")) return "en-us";
  if (lower.startsWith("en-us")) return "en-us";

  if (normalized === "zh-CN") return "zh-cn";
  if (normalized === "zh-TW") return "zh-tw";
  if (normalized === "zh-HK") return "zh-hk";
  if (normalized === "en-US") return "en-us";

  return lower;
};

export const toBundleKey = (lang: string): string => {
  return normalizeBundleLang(lang);
};

const zhFallback = I18N_FALLBACK_BUNDLES[toBundleKey(DEFAULT_LANG)] || {};

/**
 * 历史中文字面量到 i18n key 的兼容映射表。
 *
 * 作用：
 * 1. 兼容仍然传入中文字面量的老组件/老页面 props
 * 2. 兼容部分第三方组件内部仍会透传旧中文的场景
 * 3. 为 `translateText()` 提供迁移过渡期桥接能力
 *
 * 注意：
 * - 这里不是主词典，不应用于新增业务文案
 * - 新代码应优先直接传 `Mobile.*` key
 * - 只有“历史兼容”或“三方兼容”确有必要时，才允许继续补充映射项
 */
export const I18N_LITERAL_LOOKUP: Record<string, string> = {
  // 导航与首页基础文案
  首页: "Mobile.Nav.home",
  智联录: "Mobile.Nav.unionRecord",
  智能体: "Mobile.Nav.agent",
  应用: "Mobile.Nav.app",
  最近使用: "Mobile.Common.recentUsed",
  会话记录: "Mobile.Common.conversationHistory",
  菜单: "Mobile.Common.menu",
  提示: "Mobile.Common.tip",
  全部: "Mobile.Common.all",
  暂无数据: "Mobile.Common.noData",
  没有更多数据了: "Mobile.Common.noMoreData",

  // 登录与认证链路
  "登录 / 注册": "Mobile.Common.loginRegister",
  "当前展示为体验数据，登录后使用完整功能": "Mobile.Common.noticeExperience",
  同意: "Mobile.Common.agree",
  不同意: "Mobile.Common.disagree",

  // 个人中心与公共状态
  语言: "Mobile.Profile.language",

  // 协议、链接与通用反馈
  "已阅读并同意协议：": "Mobile.Auth.agreementPrefix",
  服务使用协议: "Mobile.Auth.serviceAgreement",
  隐私协议: "Mobile.Auth.privacyAgreement",
  "请同意服务协议及隐私保护！": "Mobile.Auth.pleaseAgreeProtocol",
  链接地址配置错误: "Mobile.Link.invalidConfig",
  链接已复制: "Mobile.Link.copied",
  "链接已复制，请手动粘贴打开": "Mobile.Link.copyAndOpen",
  打开链接失败: "Mobile.Link.openFailed",
  加载中: "Mobile.Page.loading",
  "加载中...": "Mobile.Page.loadingMore",
  请输入内容: "Mobile.Page.inputRequired",
  重试: "Mobile.Common.retry",
  复制成功: "Mobile.Common.copySuccess",
  复制失败: "Mobile.Common.copyFailed",
  来自: "Mobile.Common.from",
  页面首页: "Mobile.Common.pageHome",
  工作台: "Mobile.Common.workspace",

  // 搜索与列表页
  搜索智能体: "Mobile.AgentSearch.placeholder",
  暂无结果: "Mobile.AgentSearch.emptyResult",

  // 聊天输入与会话主链路
  拍照: "Mobile.Chat.takePhoto",
  相册: "Mobile.Chat.album",
  文件: "Mobile.Chat.file",
  技能: "Mobile.Chat.skill",
  对话设置: "Mobile.Conversation.settingsTitle",
  相关会话: "Mobile.Conversation.relatedTitle",
  查看全部: "Mobile.Conversation.viewAll",
  消息内容不是字符串: "Mobile.ThirdParty.UniAiX.invalidMessageContent",
  复制代码: "Mobile.ThirdParty.MpHtml.copyCode",
  保存成功: "Mobile.ThirdParty.MpHtml.saveSuccess",
  执行计划: "Mobile.ThirdParty.MpHtml.executionPlan",
  调用参数: "Mobile.ThirdParty.MpHtml.callArguments",
  调用结果: "Mobile.ThirdParty.MpHtml.callResult",
  结果为空: "Mobile.ThirdParty.MpHtml.emptyResult",
  请填写验证码: "Mobile.ThirdParty.UniCaptcha.fillCaptcha",
  scene不能为空: "Mobile.ThirdParty.UniCaptcha.sceneRequired",
  保存失败: "Mobile.ThirdParty.XTools.saveFailed",
  当前环境不支持微信操作: "Mobile.ThirdParty.XTools.wechatUnsupported",
  "获取服务失败，不支持该操作": "Mobile.ThirdParty.XTools.getServiceFailed",

  // 会话、沙盒与业务页遗留文案
  全部会话: "Mobile.Conversation.allConversations",
  新建会话: "Mobile.Conversation.newConversation",
  更多信息: "Mobile.Conversation.moreInfo",
  收藏: "Mobile.Conversation.favorite",
  分享: "Mobile.Conversation.share",
  会话链接Key不能为空: "Mobile.Conversation.chatKeyRequired",
  会话ID不能为空: "Mobile.Conversation.idRequired",
  智能体电脑选择: "Mobile.Sandbox.selectorTitle",
  电脑不可用: "Mobile.Sandbox.unavailable",
  无可用电脑: "Mobile.Sandbox.noneAvailable",
  搜索智联录: "Mobile.AgentUnion.searchPlaceholder",
  获取主页智能体列表失败: "Mobile.AgentUnion.fetchHomeAgentListFailed",
  获取分类信息失败: "Mobile.AgentList.fetchCategoryFailed",
  获取智能体列表失败: "Mobile.AgentList.fetchAgentFailed",
  取消收藏失败: "Mobile.AgentList.unCollectFailed",
  添加收藏失败: "Mobile.AgentList.collectFailed",
  "你确认要删除该智能体吗？": "Mobile.AgentList.confirmDeleteAgent",
  删除失败: "Mobile.AgentList.deleteFailed",
  未命名会话: "Mobile.Conversation.unnamed",
  未知智能体: "Mobile.Conversation.unknownAgent",
  执行中: "Mobile.Conversation.executing",
  "我是你的智能助手，有什么需要帮忙的吗？": "Mobile.TempSession.defaultDesc",
  请输入指令: "Mobile.TempSession.inputPlaceholder",
};

export const getLocalFallback = (lang: string, key: string): string => {
  const bundleKey = toBundleKey(lang);
  const defaultBundleKey = toBundleKey(DEFAULT_LANG);
  return (
    I18N_FALLBACK_BUNDLES[bundleKey]?.[key] ||
    I18N_FALLBACK_BUNDLES[defaultBundleKey]?.[key] ||
    ""
  );
};

export const resolveLiteralKey = (value: string): string => {
  return I18N_LITERAL_LOOKUP[value] || value;
};

export const getZhFallback = (key: string): string => {
  return zhFallback[key] || key;
};