---
// Poet (/p238), category (/p238/shaeri/c641) and poem (/p238/shaeri/c641/sh6556) pages
import Base from '../layouts/Base.astro';
import Seg from '../components/Seg.astro';
import { api } from '../lib/api';
import { ud, years, highlighter, parts } from '../lib/urdu';

const url = '/' + (Astro.params.path ?? '');
const page = await api(`/api/page?url=${encodeURIComponent(url)}`);
if (!page) return new Response(null, { status: 404, statusText: 'Not found' });

// group verses into couplets / single lines / paragraphs for rendering
type Verse = { position: string; couplet: number; text: string };
const blocks: { kind: 'couplet' | 'single' | 'para'; lines: string[]; mark?: string }[] = [];
if (page.type === 'poem') {
  const { matla, maqta } = page.poem;
  for (const v of page.verses as Verse[]) {
    if (v.position === 'Right') blocks.push({ kind: 'couplet', lines: [v.text],
      mark: v.couplet === matla ? 'مطلع' : v.couplet === maqta ? 'مقطع' : undefined });
    else if (v.position === 'Left' && blocks.at(-1)?.kind === 'couplet' && blocks.at(-1)!.lines.length === 1) blocks.at(-1)!.lines.push(v.text);
    else if (v.position === 'Paragraph') blocks.push({ kind: 'para', lines: [v.text] });
    else blocks.push({ kind: 'single', lines: [v.text] });
  }
}
// pen name (marked ؔ in the text) set apart; split() with a capture group puts matches at odd indexes
// ?hl= (from search results) marks the searched words on the page; segments: [text, 'mark' | 'pen' | '']
const hlq = Astro.url.searchParams.get('hl') ?? '';
const re = highlighter(hlq);
const show = (line: string) => parts(line, re).flatMap((s, i): [string, string][] =>
  i % 2 ? [[s, 'mark']] : s.split(/(\S*\u0614\S*)/).map((t, j) => [t, j % 2 ? 'pen' : '']));
// contents of a divan grouped by radif letter ("ردیف الف … ی"); ے is filed under ی as in printed divans
const LETTER = (l: string) => (l === 'ا' ? 'الف' : l === 'ے' ? 'ی' : l);
const groups: { letter: string | null; poems: any[] }[] = [];
for (const p of page.poems ?? []) {
  const l = p.radif_letter ? LETTER(p.radif_letter) : null;
  if (groups.at(-1)?.letter !== l || !groups.length) groups.push({ letter: l, poems: [] });
  groups.at(-1)!.poems.push(p);
}
const crumbs = page.breadcrumbs ?? [];
const title = page.type === 'poem' ? page.poem.title : page.type === 'poet' ? page.poet.nickname : page.category.title;
---
<Base title={page.type === 'poem' ? `${page.poem.title} · ${page.poet.nickname}` : title} description={page.type === 'poet' ? page.poet.description?.slice(0, 160) : undefined}>
  {page.type !== 'poet' && (
    <nav class="crumbs">
      {crumbs.map((c: any, i: number) => (
        i < crumbs.length - 1 || page.type === 'poem' ? <span><a href={c.url}>{c.title}</a></span> : <span>{c.title}</span>
      ))}
    </nav>
  )}

  {page.type === 'poet' && (
    <>
      <h1>{page.poet.name}</h1>
      <p class="muted">{years(page.poet)}</p>
      {page.poet.description && <div class="intro">{page.poet.description}</div>}
    </>
  )}
  {page.type === 'category' && <h1>{page.category.title}</h1>}

  {page.type !== 'poem' && page.children.length > 0 && (
    <div class="cards">
      {page.children.map((c: any) => (
        <a class="card" href={c.url}>{c.title}{c.poems > 0 && <small>{ud(c.poems)}</small>}</a>
      ))}
    </div>
  )}
  {page.type !== 'poem' && groups.map((g) => (
    <>
      {g.letter && <h2 class="radif-head">ردیف {g.letter}</h2>}
      <ol class="toc">{g.poems.map((p: any) => <li><a href={p.url}>{p.title}</a></li>)}</ol>
    </>
  ))}

  {page.type === 'poem' && (
    <>
      <h1><Seg s={show(page.poem.title)} /></h1>
      {re && (
        <p class="hl-note muted">
          «{hlq}» نمایاں · <a href={`/search?q=${encodeURIComponent(hlq)}`}>تلاش کے نتائج</a> · <a href={url}>نشان ہٹائیں</a>
        </p>
      )}
      {page.poem.radif != null && <p class="muted radif">{page.poem.radif ? `ردیف: ${page.poem.radif}` : 'غیر مردف'}</p>}
      <article class="poem" data-cite={`${page.poet.nickname}، ${page.poem.title}`}>
        {blocks.map((b) =>
          b.kind === 'couplet' ? <div class="couplet" data-mark={b.mark}>{b.lines.map((l) => <p><Seg s={show(l)} /></p>)}</div>
          : b.kind === 'para' ? <p class="para"><Seg s={show(b.lines[0])} /></p>
          : <p class="single"><Seg s={show(b.lines[0])} /></p>
        )}
      </article>
      <p class="muted hint">کسی لفظ کو منتخب کریں تو اس کے معنی اور تلفظ ساتھ نظر آئیں گے۔</p>
      <nav class="poem-nav">
        {page.next ? <a href={page.next}>اگلا ›</a> : <span />}
        {page.prev ? <a href={page.prev}>‹ پچھلا</a> : <span />}
      </nav>
      {page.poem.source_url && (
        <p class="source">ماخذ: <a href={page.poem.source_url}>ویکی ماخذ</a> · {page.poet && <a href={page.poet.url}>{page.poet.nickname}</a>}</p>
      )}
    </>
  )}
  {re && <script is:inline>document.querySelector('.poem mark')?.scrollIntoView({ block: 'center' });</script>}
</Base>