---
// /en/archives/{slug}：英文版文章页——postsEn 优先；缺译回退 zh 正文 + 醒目标注
import type { CollectionEntry } from 'astro:content';
import { getCollection, render } from 'astro:content';
import BaseLayout from '../../../layouts/BaseLayout.astro';
import ArtalkComments from '../../../components/ArtalkComments.astro';
import AiTranslatedBadge from '../../../components/AiTranslatedBadge.astro';
import { t } from '../../../i18n/ui';

export async function getStaticPaths() {
  // 路径全量（hidden 样张出页）；prev/next 滤 hidden（同 zh 轨修正）
  const all = (await getCollection('posts', ({ data }) => !data.draft)).sort(
    (a, b) => b.data.pubDate.getTime() - a.data.pubDate.getTime(),
  );
  const nav = all.filter(({ data }) => !data.tags.includes('hidden'));
  const en = new Map((await getCollection('postsEn')).map((e) => [e.id, e]));
  return all.map((entry) => {
    const i = nav.findIndex((e) => e.id === entry.id);
    return {
      params: { slug: entry.id },
      props: {
        entry,
        enEntry: en.get(entry.id) ?? null,
        prev: i >= 0 ? (nav[i + 1] ?? null) : null,
        next: i > 0 ? (nav[i - 1] ?? null) : null,
      },
    };
  });
}

interface Props {
  entry: CollectionEntry<'posts'>;
  enEntry: CollectionEntry<'postsEn'> | null;
  prev: CollectionEntry<'posts'> | null;
  next: CollectionEntry<'posts'> | null;
}
const { entry, enEntry, prev, next } = Astro.props;
// 译文存在则渲染译文；否则回退 zh 正文（语言切换的降级承诺：单篇未译不破站）
const { Content } = await render(enEntry ?? entry);
const isReading = entry.data.category === 'reading';
const date = entry.data.pubDate.toISOString().slice(0, 10);
const words = (enEntry?.body ?? entry.body ?? '').split(/\s+/).length;
const minutes = Math.max(1, Math.ceil(words / 220));
---

<BaseLayout title={`${enEntry?.data.title ?? entry.data.title} · wait4x`} track={isReading ? 'reading' : 'tech'}>
  <article class={`post ${isReading ? 'post-reading' : 'post-tech'}`}>
    <header class="post-head">
      <p class="post-cat">
        {isReading ? t('category_reading', 'en') : entry.data.category === 'tech' ? t('category_tech', 'en') : t('category_photo', 'en')}
      </p>
      <h1 class="post-title">{enEntry?.data.title ?? entry.data.title}</h1>
      <p class="post-meta">
        <i class="emo" style={`background:${entry.data.mood ?? 'var(--mood)'}`} aria-hidden="true" />
        <time datetime={entry.data.pubDate.toISOString()}>{date}</time>
        <span aria-hidden="true">·</span>
        <span>{minutes} {t('reading_time_min', 'en')}</span>
      </p>
    </header>
    <AiTranslatedBadge />
    <div class={isReading ? 'prose-reading' : 'prose-tech'}>
      <Content />
    </div>
    <nav class="pn">
      {prev && <a class="pn-item" href={`/en/archives/${prev.id}/`}>← {t('prev_post', 'en')} · {prev.data.title}</a>}
      {next && <a class="pn-item" href={`/en/archives/${next.id}/`}>{t('next_post', 'en')} · {next.data.title} →</a>}
    </nav>
    <ArtalkComments pageKey={`/archives/${entry.id}/`} pageTitle={entry.data.title} />
  </article>
</BaseLayout>

<style>
  .post-head { margin-bottom: var(--space-4); }
  .post-cat { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); letter-spacing: 0.08em; }
  .post-title { font-size: var(--text-h1); line-height: var(--leading-heading); color: var(--ink-1); text-wrap: balance; }
  .post-meta { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-2); font-size: 13px; color: var(--ink-3); }
  .emo { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }
  .pn { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-5); }
  .pn-item { font-size: 14px; color: var(--ink-2); transition: color var(--dur) var(--ease); }
  .pn-item:hover { color: var(--accent); }

  /* ---- T5 code window bar (§6-3): ≥4-line blocks only ---- */
  .prose-tech :global(pre.code-win) {
    position: relative;
    padding-top: calc(var(--space-3) + 30px);
  }
  .prose-tech :global(pre.code-win::before) {
    content: attr(data-lang);
    position: absolute;
    inset: 0 0 auto 0;
    height: calc(var(--space-3) + 30px - 1px);
    display: flex;
    align-items: flex-end;
    padding: 0 14px 8px 66px;
    background: #161b22;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px 8px 0 0;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.04em;
    color: #6e7681;
    text-transform: lowercase;
  }
  .prose-tech :global(pre.code-win::after) {
    content: '';
    position: absolute;
    top: 10px;
    left: 14px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #30363d;
    box-shadow: 18px 0 0 #30363d, 36px 0 0 #30363d;
  }

  /* ---- T6 reading paper card (§6-2) ---- */
  .prose-reading {
    border: 1px solid var(--paper-line);
    border-radius: 12px;
    padding: var(--space-5) clamp(20px, 4vw, 32px);
  }
</style>

<script>
  // Code window bar marker (same as zh track): count lines, tag .code-win + data-lang
  const markCodeWins = () => {
    document.querySelectorAll('.prose-tech pre:not(.code-win)').forEach((pre) => {
      const code = pre.querySelector('code');
      if (!code) return;
      const lines = (code.textContent ?? '').split('\n').length;
      if (lines >= 4) {
        // astro shiki 语言落 pre[data-language]（code 类名为空）
        const lang = pre.dataset.language ?? /language-([\w-]+)/.exec(code.className)?.[1] ?? 'text';
        pre.dataset.lang = lang;
        pre.classList.add('code-win');
      }
    });
  };
  document.addEventListener('astro:page-load', markCodeWins);
  markCodeWins();
</script>