/**
 * 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' },
  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 gitea · 构建期生成', en: 'via gitea · generated at build time' },
} 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;
}