/**
 * UI 双语字典：组件静态文案的单一事实源。
 * 约定：key 稳定小写蛇形；zh 是源语言（先有），en 跟随；
 * 车道协作：op-gitea 扩展本表并串接五组件（Footer/SearchDialog/gallery/moments/about）。
 */
export type Locale = 'zh' | 'en';

const dict = {
  skip_to_content: { zh: '跳到正文', en: 'Skip to content' },
  nav_posts: { zh: '文章', en: 'Posts' },
  nav_gallery: { zh: '图库', en: 'Gallery' },
  nav_about: { zh: '关于', en: 'About' },
  cmd_reader: { zh: '阅读模式（纯文本）', en: 'Reader mode (plain text)' },
  nav_opensource: { zh: '开源', en: 'Projects' }, // en 用短词：390-430px 尾部主题钮免内滚（用户拍板）
  nav_books: { zh: '书架', en: 'Books' },
  kbd_gs_books: { zh: '书架', en: 'Books' },
  // 论文内置阅读页（arXiv 原站 iframe 直嵌，PDF 不入仓）
  paper_read_online: { zh: '在线研读全文 PDF', en: 'Read the full PDF online' },
  paper_license: { zh: '授权', en: 'License' },
  paper_download: { zh: '下载 PDF', en: 'Download PDF' },
  paper_fallback_title: { zh: '无法内嵌展示全文，请用浏览器打开', en: 'Inline preview unavailable — open in a browser' },
  paper_wechat_hint: { zh: '微信内请点右上角「···」→ 在浏览器打开', en: 'In WeChat, tap ··· (top right) → Open in Browser' },
  paper_open_browser: { zh: '在浏览器中打开 PDF →', en: 'Open the PDF in your browser →' },
  paper_loading: { zh: '正在加载 PDF…', en: 'Loading PDF…' },
  paper_prev_page: { zh: '上一页', en: 'Previous page' },
  paper_next_page: { zh: '下一页', en: 'Next page' },
  paper_zoom_in: { zh: '放大', en: 'Zoom in' },
  paper_zoom_out: { zh: '缩小', en: 'Zoom out' },
  paper_page_label: { zh: '页码', en: 'Page' },
  // 折叠批（2026-11-02）：首页限 6 篇 + 归档/书架按年折叠
  home_more_posts: { zh: '全部文章 →', en: 'All posts →' },
  unit_posts: { zh: '篇', en: 'posts' },
  search_label: { zh: '搜索', en: 'Search' },
  search_placeholder: { zh: '搜索文章…（Esc 关闭）', en: 'Search posts… (Esc to close)' },
  search_hint: { zh: '索引由 Pagefind 构建期生成 · 静态站零后端', en: 'Index built by Pagefind · zero-backend static site' },
  footer_copyright: { zh: '©', en: '©' },
  reading_time_min: { zh: '分钟', en: 'min' },
  category_reading: { zh: '阅读', en: 'Reading' },
  category_tech: { zh: '技术', en: 'Tech' },
  category_photo: { zh: '照片', en: 'Photo' },
  latest_photos: { zh: '最新影像', en: 'Latest photos' },
  enter_gallery: { zh: '进入图库 →', en: 'Gallery →' },
  open_source_projects: { zh: '开源 · Projects', en: 'Open Source · Projects' },
  self_hosted: { zh: '自托管', en: 'self-hosted' },
  prev_post: { zh: '上一篇', en: 'Previous' },
  next_post: { zh: '下一篇', en: 'Next' },
  ai_translated_note: {
    zh: '本文由机器翻译自中文原文，欢迎指正。',
    en: 'Machine-translated from the Chinese original. Corrections welcome.',
  },

  // ===== T2 车道（op-gitea）：Footer/SearchDialog/gallery/moments/about 静态文案 =====
  // footer_icp 是法定备案标识，英文页照抄不译
  search_no_results: { zh: '无结果', en: 'No results' },
  footer_icp: { zh: '陕ICP备2026014860号-1', en: '陕ICP备2026014860号-1' },
  gallery_title: { zh: '图库', en: 'Gallery' },
  gallery_filter_legend: { zh: '分组筛选', en: 'Filter by group' },
  gallery_filter_all: { zh: '全部', en: 'All' },
  gallery_filter_street: { zh: '街拍', en: 'Street' },
  gallery_filter_landscape: { zh: '风景', en: 'Landscape' },
  // {n}/{title}/{exif} 为占位符，调用点 .replace() 填值
  gallery_count: { zh: '共 {n} 张 · EXIF 构建期自动提取', en: '{n} photos · EXIF extracted at build time' },
  gallery_view_aria: { zh: '查看大图：{title}', en: 'View photo: {title}' },
  gallery_view_aria_exif: { zh: '（{exif}）', en: ' ({exif})' },
  gallery_lightbox_label: { zh: '照片查看', en: 'Photo viewer' },
  gallery_lightbox_close: { zh: '关闭（Esc）', en: 'Close (Esc)' },
  gallery_lightbox_prev: { zh: '上一张（←）', en: 'Previous (←)' },
  gallery_lightbox_next: { zh: '下一张（→）', en: 'Next (→)' },
  gallery_lightbox_original: { zh: '原图', en: 'Original' },
  gallery_lightbox_download: { zh: '下载', en: 'Download' },
  moments_title: { zh: '瞬间', en: 'Moments' },
  moments_note: { zh: '零碎的记录：随手拍、一句话感想、开源动态。', en: 'Fragmented notes: casual shots, one-liners, and open-source updates.' },
  about_title: { zh: '关于', en: 'About' },
  about_tracks_title: { zh: '兴趣版图', en: 'Interests' },
  about_track_reading_name: { zh: '阅读', en: 'Reading' },
  about_track_reading_desc: { zh: '文学与戏剧为主，读到哪写到哪。', en: 'Mostly literature and drama; I write as I read.' },
  about_track_tech_name: { zh: '技术', en: 'Tech' },
  about_track_tech_desc: { zh: 'Linux、容器与自托管，把家里的小机器折腾成顺手的工具。', en: 'Linux, containers, and self-hosting — turning the little machines at home into handy tools.' },
  about_track_photo_name: { zh: '摄影', en: 'Photography' },
  about_track_photo_desc: { zh: '街拍与山野，随身一台无反，在等光的间隙按快门。', en: 'Street and landscapes with a mirrorless camera, pressing the shutter while waiting for the light.' },
  about_build_aria: { zh: '本站构建说明', en: 'Site build notes' },
  about_build_title: { zh: '本站如何构建', en: 'How this site is built' },
  about_build_desc: {
    zh: '页面由 Astro 静态生成，不含运行时框架 JS；内容住在自托管 gitea——本地编辑器与 gitea 网页写的是同一个 git 仓库，push 之后由 homelab 自动构建发布；评论走自托管 Artalk。页脚 built from 一行链到本次构建对应的 commit，构建过程透明可追溯。',
    en: 'Pages are statically generated by Astro with no runtime framework JS. Content lives on a self-hosted gitea — my local editor and the gitea web UI write to the same git repository, and each push is built and published automatically by the homelab. Comments run on self-hosted Artalk. The built-from line in the footer links to the commit behind this build, keeping the process transparent and traceable.',
  },

  // ===== 热力图（Phase 4 T2 车道）：文案全部页面层注入，组件保持 locale 无关 =====
  heatmap_title: { zh: '开源活动', en: 'Open Source Activity' },
  // {n} 为总贡献次数占位符，调用点 .replace() 填值
  heatmap_summary: { zh: '最近一年 {n} 次贡献', en: '{n} contributions in the last year' },
  heatmap_less: { zh: '少', en: 'Less' },
  heatmap_more: { zh: '多', en: 'More' },
  heatmap_note: { zh: '数据来自 GitHub · 构建期生成', en: 'via GitHub · generated at build time' },

  // ===== B 车道：Footer 极客双页入口（stack/colophon 页内文案各自内联，不入本表） =====
  footer_stack: { zh: '装备', en: 'stack' },
  footer_colophon: { zh: '制作', en: 'colophon' },

  // ===== C 车道：Keyboard 帮助表全量词条（组件 Astro.url 构建期自推断 locale） =====
  kbd_title: { zh: '键盘快捷键', en: 'Keyboard shortcuts' },
  kbd_palette: { zh: '命令面板', en: 'Command palette' },
  kbd_theme_toggle: { zh: '切换明暗', en: 'Toggle light / dark' },
  kbd_this_help: { zh: '本帮助', en: 'This help' },
  kbd_gh_home: { zh: '首页', en: 'Home' },
  kbd_ga_posts: { zh: '文章', en: 'Posts' },
  kbd_gg_gallery: { zh: '图库', en: 'Gallery' },
  kbd_gm_moments: { zh: '瞬间', en: 'Moments' },
  kbd_terminal: { zh: '终端彩蛋', en: 'Terminal easter egg' },
  kbd_esc_close: { zh: '关闭浮层', en: 'Close dialogs' },
  kbd_hint: { zh: '提示：/terminal 终端彩蛋等你探索', en: 'Tip: the /terminal easter egg awaits' },

  // ===== F 车道：访问量小字（Artalk pv，组件内独立计数） =====
  pv_viewed: { zh: '人看过', en: 'views' },
  pinned_label: { zh: '置顶', en: 'Pinned' },
  comment_count: { zh: '条评论', en: 'comments' },
  moment_comments: { zh: '评论', en: 'Comments' },
  lb_hint: { zh: '滚轮缩放 · 双击放大 · Esc 关闭', en: 'Wheel to zoom · Double-click · Esc' },
  lb_hint_touch: { zh: '双指缩放 · 双击放大', en: 'Pinch to zoom · Double-tap' },

  // ===== 命令面板（Phase 4 T1 车道）：动作/导航/分组与键位提示 =====
  nav_home: { zh: '首页', en: 'Home' },
  nav_moments: { zh: '瞬间', en: 'Moments' },
  cmd_palette_label: { zh: '命令面板', en: 'Command palette' },
  cmd_group_actions: { zh: '动作', en: 'Actions' },
  cmd_group_nav: { zh: '导航', en: 'Navigation' },
  cmd_group_search: { zh: '搜索结果', en: 'Search results' },
  cmd_toggle_theme: { zh: '切换明暗主题', en: 'Toggle dark mode' },
  // 语言动作按当前页面语言命名目标语（zh 页提示切到 English，反之亦然）
  cmd_switch_lang: { zh: '切换到 English', en: 'Switch to Chinese' },
  cmd_open_gitea: { zh: '打开 gitea 源码仓', en: 'Open the gitea repo' },
  cmd_copy_rss: { zh: '复制 RSS 地址', en: 'Copy RSS address' },
  cmd_copied: { zh: '已复制 ✓', en: 'Copied ✓' },
  cmd_hint: { zh: '↑↓ 选择 · Enter 执行 · Esc 关闭', en: '↑↓ navigate · Enter run · Esc close' },
} as const;

export type UiKey = keyof typeof dict;

/** 取串：locale 缺省 zh；未知 key 原样返回（编译期 tsc 已挡）。 */
export function t(key: UiKey, locale: Locale = 'zh'): string {
  return dict[key][locale] ?? dict[key].zh;
}