---
// Search: poets/writers by name and books/chapters by title (first page), then the content results, paged
import Base from '../layouts/Base.astro';
import Seg from '../components/Seg.astro';
import { api } from '../lib/api';
import { ud, years, highlighter, parts, excerpt } from '../lib/urdu';

const q = Astro.url.searchParams.get('q')?.trim() ?? '';
// one or more poets/writers to search within (?poet=1&poet=2, or ?poet=1,2)
const poetIds = [...new Set(Astro.url.searchParams.getAll('poet').flatMap((v) => v.split(',')).map(Number).filter((n) => n > 0))];
const pageNo = Math.max(1, Number(Astro.url.searchParams.get('page')) || 1);
const res = q ? await api(`/api/search?q=${encodeURIComponent(q)}&page=${pageNo}${poetIds.length ? `&poet=${poetIds.join(',')}` : ''}`) : null;
// every poet/writer for the name box (382; filtered in the browser)
const allPoets = res ? ((await api('/api/poets')) ?? []).map((p: any) => ({ id: p.id, name: p.nickname })) : [];
const pages = res ? Math.ceil(res.total / res.pageSize) : 0;
const re = highlighter(q);
const hl = (t: string) => parts(t, re).map((s, i): [string, string] => [s, i % 2 ? 'mark' : '']);
const open = (url: string) => `${url}?hl=${encodeURIComponent(q)}`;
const link = (n: number, poets: number[] = poetIds) => `/search?q=${encodeURIComponent(q)}${poets.length ? `&poet=${poets.join(',')}` : ''}${n > 1 ? `&page=${n}` : ''}`;
// author chips: the selected ones first, then the authors the results come from
const chips = res ? [...res.selected.map((p: any) => ({ ...p, n: res.authors.find((a: any) => a.id === p.id)?.n ?? 0 })),
  ...res.authors.filter((a: any) => !poetIds.includes(a.id))] : [];
// numbered pages: first, last, and two either side of the current one; gaps shown as …
const numbers = (() => {
  const keep = new Set([1, pages, pageNo - 2, pageNo - 1, pageNo, pageNo + 1, pageNo + 2].filter((n) => n >= 1 && n <= pages));
  const sorted = [...keep].sort((a, b) => a - b), out: (number | null)[] = [];
  sorted.forEach((n, i) => { if (i && n - sorted[i - 1] > 1) out.push(null); out.push(n); });
  return out;
})();
const from = res ? (pageNo - 1) * res.pageSize + 1 : 0, to = res ? Math.min(res.total, pageNo * res.pageSize) : 0;
---
<Base title={q ? `تلاش: ${q}` : 'تلاش'} q={q}>
  {!q && <p class="muted">اوپر کے خانے میں شاعر کا نام، شعر، لفظ یا عبارت لکھیں۔ پوری عبارت کے لیے اسے "…" میں لکھیں۔</p>}
  {res && (
    <>
      <h1>تلاش: {q}</h1>

      {res.poets.length > 0 && (
        <section class="search-group">
          <h2>شعرا و ادبا <small class="muted">{ud(res.poets.length)}</small></h2>
          <div class="poets">
            {res.poets.map((p: any) => (
              <div class="poet-result">
                <a class="poet-card" href={p.url}><Seg s={hl(p.nickname)} /><small>{years(p)}</small></a>
                <a class="muted small" href={link(1, [p.id])}>{ud(p.works)} کلام میں «{q}»</a>
              </div>
            ))}
          </div>
        </section>
      )}

      {res.books.length > 0 && (
        <section class="search-group">
          <h2>کتابیں اور ابواب <small class="muted">{ud(res.books.length)}</small></h2>
          <ul class="book-results">
            {res.books.map((b: any) => (
              <li><a href={b.url}><Seg s={hl(b.title)} /></a> · <a class="muted" href={b.poet_url}>{b.poet}</a> <small class="muted">({ud(b.works)})</small></li>
            ))}
          </ul>
        </section>
      )}

      <section class="search-group">
        <h2>کلام <small class="muted">{ud(res.total)}</small></h2>
        {chips.length > 0 && (
          <form method="get" action="/search" class="author-filter" id="author-filter">
            <input type="hidden" name="q" value={q} />
            <p class="muted">شاعر یا ادیب کے لحاظ سے محدود کریں:</p>
            <div class="author-chips">
              {chips.map((a: any, i: number) => (
                <label class={`chip${i >= 12 && !poetIds.includes(a.id) ? ' extra' : ''}`}>
                  <input type="checkbox" name="poet" value={a.id} checked={poetIds.includes(a.id)} />
                  {a.nickname} <small>{ud(a.n)}</small>
                </label>
              ))}
              {chips.length > 12 && <button type="button" class="chip more" onclick="this.parentElement.classList.add('all'); this.remove()">مزید {ud(chips.length - 12)}</button>}
            </div>
            <div class="author-find">
              <input id="author-name" data-urdu placeholder="کسی اور شاعر یا ادیب کا نام" autocomplete="off" aria-label="شاعر کا نام" />
              <button type="button" class="in-box-btn" data-urdu-rom="author-name" title="رومن حروف سے اردو">اب</button>
              <button type="button" class="in-box-btn" data-urdu-kb="author-name" title="اردو کی بورڈ" aria-label="اردو کی بورڈ">
                <svg viewBox="0 0 24 24" width="18" height="18" fill="none" stroke="currentColor" stroke-width="1.6" aria-hidden="true"><rect x="2" y="6" width="20" height="12" rx="2"/><path d="M6 10h.01M10 10h.01M14 10h.01M18 10h.01M7 14h10" stroke-linecap="round" stroke-width="2"/></svg>
              </button>
              <div class="author-suggest" id="author-suggest" hidden></div>
            </div>
            <p class="filter-actions">
              <button type="submit">نتائج محدود کریں</button>
              {poetIds.length > 0 && <a href={link(1, [])}>سب شعرا میں تلاش</a>}
            </p>
            <script type="application/json" id="all-poets" set:html={JSON.stringify(allPoets)} />
          </form>
        )}
        <p class="muted center">
          {res.total ? (pages > 1 ? `نتائج ${ud(from)}–${ud(to)} از ${ud(res.total)}` : `${ud(res.total)} نتائج`)
            : 'کلام میں کوئی نتیجہ نہیں ملا۔ کم الفاظ یا کلیدی لفظ آزمائیں۔'}
        </p>
        {res.results.map((r: any) => (
          <div class="result">
            <a href={open(r.url)}><Seg s={hl(r.title)} /></a> · <a class="muted" href={r.poet_url}>{r.poet}</a>
            {r.snippet.length > 0 && (
              <a class="snippet" href={open(r.url)}>
                {r.prose ? <p><Seg s={hl(excerpt(r.snippet[0], re))} /></p> : r.snippet.map((l: string) => <p><Seg s={hl(l)} /></p>)}
              </a>
            )}
          </div>
        ))}
        {pages > 1 && (
          <nav class="pager" aria-label="صفحات">
            {pageNo > 1 ? <a href={link(pageNo - 1)} rel="prev">‹ پچھلا</a> : <span />}
            <span class="pages">
              {numbers.map((n) => n === null ? <span class="gap">…</span>
                : n === pageNo ? <span class="current" aria-current="page">{ud(n)}</span>
                : <a href={link(n)}>{ud(n)}</a>)}
            </span>
            {pageNo < pages ? <a href={link(pageNo + 1)} rel="next">اگلا ›</a> : <span />}
          </nav>
        )}
      </section>
    </>
  )}
  <script is:inline>
    // author filter: ticking a chip applies it; the name box suggests any poet/writer (Urdu-normalised)
    (() => {
      const form = document.getElementById('author-filter'); if (!form) return;
      form.addEventListener('change', (e) => { if (e.target.name === 'poet') form.submit(); });
      const poets = JSON.parse(document.getElementById('all-poets').textContent);
      const norm = (s) => s.normalize('NFC').replace(/[\u064B-\u0652\u0654\u0670\u0614]/g, '').replace(/[يىئ]/g, 'ی').replace(/ك/g, 'ک').replace(/[هۂ]/g, 'ہ').replace(/[أإ]/g, 'ا');
      const box = document.getElementById('author-name'), list = document.getElementById('author-suggest');
      const add = (p) => {
        const i = document.createElement('input'); i.type = 'hidden'; i.name = 'poet'; i.value = p.id;
        form.append(i); form.submit();
      };
      box.addEventListener('input', () => {
        const t = norm(box.value.trim());
        const hits = t ? poets.filter((p) => norm(p.name).includes(t)).slice(0, 12) : [];
        list.replaceChildren(...hits.map((p) => {
          const b = document.createElement('button'); b.type = 'button'; b.textContent = p.name; b.onclick = () => add(p); return b;
        }));
        list.hidden = !hits.length;
      });
      box.addEventListener('keydown', (e) => { if (e.key === 'Enter') { e.preventDefault(); list.querySelector('button')?.click(); } });
    })();
  </script>
</Base>