'use strict';
/* Curated catalog UI. Ratings are personal; scraper inspection is admin-only. */
(async function () {
  let me, data;
  try { [me, data] = await Promise.all([api('api/me'), api('api/greatest')]); } catch (error) { return showError(error); }
  topNav(me);
  const main = $('main'); main.textContent = '';
  let sortMode = store.get('greatest-sort') === 'all' ? 'all' : 'mine';
  let filterMode = 'all';
  const query = h('input', { type: 'search', placeholder: 'Search the collection…', 'aria-label': 'Search Greatest of All Time' });
  const count = h('span', { class: 'muted small', 'aria-live': 'polite' });
  const mine = h('button', { type: 'button', class: 'btn small' }, 'Rank by my vote');
  const everyone = h('button', { type: 'button', class: 'btn small' }, 'Rank by everyone');
  const filterBar = h('div', { class: 'greatest-filters', 'aria-label': 'Filter by your rating' });
  const filters = [
    ['all', 'All'], ['rated', 'Rated'], ['flame', '🔥 Flame'], ['good', '👍 Looks good'],
    ['neutral', '● Neutral'], ['skip', '💀 Not for me'], ['unrated', 'Unrated'], ['owned', '📚 In library'],
  ];
  const filterButtons = new Map();
  for (const [value, label] of filters) {
    const button = h('button', { type: 'button', class: 'filter-chip' }, label);
    button.onclick = () => { filterMode = value; render(); };
    filterButtons.set(value, button); filterBar.append(button);
  }
  const results = h('div', { class: 'greatest-periods' });
  const dialog = h('dialog', { class: 'greatest-dialog', 'aria-label': 'Manga details' });
  const sourceCache = new Map();
  let detailId = null;
  document.body.append(dialog);
  mine.onclick = () => { sortMode = 'mine'; store.set('greatest-sort', sortMode); render(); };
  everyone.onclick = () => { sortMode = 'all'; store.set('greatest-sort', sortMode); render(); };
  query.oninput = render;
  main.append(
    h('div', { class: 'greatest-intro' },
      h('p', { class: 'greatest-eyebrow' }, 'Greatest of All Time'),
      h('h1', {}, data.title || 'Shijō Saikō no Manga'),
      h('p', { class: 'muted' }, '史上最高の漫画 · A curated journey through manga history. Your votes are private to your account; the community ranking combines everyone’s votes.'),
      h('p', { class: 'muted small' }, '🔥 Definitely want · 👍 Looks good · ● Neutral · 💀 Not for me · 📚 Already in your library')),
    h('div', { class: 'greatest-toolbar' }, query, h('div', { class: 'greatest-sort' }, mine, everyone)),
    filterBar, count, results);

  function ratingButtons(item, compact = false) {
    const bar = h('div', { class: 'greatest-votes' + (compact ? ' compact' : ''), 'aria-label': `Rate ${item.title}` });
    for (const [value, symbol, label] of [
      ['flame', '🔥', 'Definitely want'], ['good', '👍', 'Looks good'],
      ['neutral', '●', 'Neutral'], ['skip', '💀', 'Not for me'],
    ]) {
      const selected = item.myRating === value;
      const button = h('button', { type: 'button', class: 'greatest-vote' + (selected ? ' selected' : ''),
        'aria-label': `${label}: ${item.title}`, 'aria-pressed': String(selected), title: label }, symbol);
      button.onclick = async event => {
        event.stopPropagation(); button.disabled = true;
        try {
          const next = selected ? null : value;
          const saved = await api('api/greatest/rating', { id: item.id, rating: next });
          Object.assign(item, saved);
          render();
          if (dialog.open) openDetails(item);
        } catch (error) { alert(error.message || String(error)); button.disabled = false; }
      };
      bar.append(button);
    }
    return bar;
  }

  function cover(item) {
    const box = h('span', { class: 'greatest-cover' }, h('span', { class: 'greatest-cover-fallback', 'aria-hidden': 'true' }, item.title.slice(0, 1)));
    // Covers come from the server (cached catalog covers, owned library covers) as relative URLs.
    const src = /^(api\/greatest-cover\?|lib\/)/.test(item.cover || '') ? item.cover : safeHref(item.cover);
    if (src) {
      const image = h('img', { src, alt: '', loading: 'lazy' });
      image.onerror = () => image.remove();
      box.append(image);
    }
    return box;
  }

  function tile(item) {
    const open = h('button', { type: 'button', class: 'greatest-open', 'aria-label': `Details for ${item.title}` },
      cover(item),
      item.library ? h('span', { class: 'greatest-owned', title: 'Already in your library' }, '📚 In library') : null,
      h('span', { class: 'greatest-name' }, item.title),
      h('span', { class: 'greatest-meta' }, `${item.year} · ${item.chapters == null ? 'Chapters unknown' : `${item.chapters} chapters`}`),
      h('span', { class: 'greatest-meta' }, statusLabel(item.status)),
      h('span', { class: 'greatest-reason-label' }, 'Why it matters'),
      h('span', { class: 'greatest-reason' }, plainNote(item.note)));
    open.onclick = () => openDetails(item);
    return h('article', { class: 'greatest-tile' }, open, ratingButtons(item, true));
  }

  function statusLabel(status) {
    return status === 'ongoing' ? 'Ongoing' : status === 'completed' ? 'Completed' : 'Status unknown';
  }
  function plainNote(note) { return String(note || '').replace(/\*/g, ''); }

  function openDetails(item) {
    detailId = item.id;
    dialog.textContent = '';
    const close = h('button', { type: 'button', class: 'btn small', onclick: () => dialog.close() }, 'Close');
    const links = h('div', { class: 'greatest-links' });
    if (item.library) links.append(h('a', { class: 'btn primary', href: mangaUrl(item.library.id) }, 'Open in library'));
    if (safeHref(item.source?.url)) links.append(h('a', { class: 'btn', href: item.source.url, target: '_blank', rel: 'noopener noreferrer' },
      `Official ${item.source.kind || 'source'} ↗`));
    if (safeHref(item.metadata?.url)) links.append(h('a', { class: 'btn', href: item.metadata.url, target: '_blank', rel: 'noopener noreferrer' }, 'AniList metadata ↗'));
    const hosterPanel = h('section', { class: 'greatest-hoster-panel', 'aria-label': 'Scraper sources' });
    const votes = item.votes || {};
    dialog.append(
      h('div', { class: 'greatest-dialog-head' }, h('span', { class: 'muted small' }, `${item.period} · curator #${item.rank}`), close),
      h('div', { class: 'greatest-dialog-body' }, cover(item), h('div', {},
        h('h2', {}, item.title),
        h('p', { class: 'muted' }, `${item.year} · ${item.chapters == null ? 'Chapter count unknown' : `${item.chapters} chapters`} · ${statusLabel(item.status)}`),
        h('h3', { class: 'greatest-reason-heading' }, 'Why it matters'),
        h('p', {}, plainNote(item.note)),
        h('p', { class: 'muted small' }, `Community votes: 🔥 ${votes.flame || 0} · 👍 ${votes.good || 0} · ● ${votes.neutral || 0} · 💀 ${votes.skip || 0}`),
        ratingButtons(item), links, hosterPanel,
        h('p', { class: 'muted small' }, 'Chapter counts and status come from public catalog metadata, or from your local library when present. Availability may vary by region.'))));
    if (!dialog.open) dialog.showModal();
    renderHosters(item, hosterPanel, sourceCache.get(item.id));
    if (me.admin && !sourceCache.has(item.id)) refreshHosters(item, hosterPanel);
  }

  async function refreshHosters(item, panel) {
    try {
      const state = await api(`api/greatest/sources?id=${encodeURIComponent(item.id)}`);
      sourceCache.set(item.id, state);
      if (detailId === item.id && dialog.open) renderHosters(item, panel, state);
    } catch (error) {
      if (detailId === item.id && dialog.open) renderHosters(item, panel, { available: false, error: error.message, links: item.hosters || [] });
    }
  }

  function renderHosters(item, panel, state) {
    panel.textContent = '';
    panel.append(h('h3', { class: 'greatest-reason-heading' }, 'MangaDex / WeebCentral'));
    if (me.admin && !state) {
      panel.append(h('p', { class: 'muted small' }, 'Checking scraper queue…'));
      return;
    }
    const links = state?.links || item.hosters || [];
    const jobs = state?.jobs || [];
    if (!links.length) panel.append(h('p', { class: 'muted small' }, 'No confirmed series link yet. A title search may find a different edition; check it before adding.'));
    for (const link of links) {
      const job = jobs.find(job => job.source === link.source && job.seriesId === link.seriesId);
      panel.append(h('div', { class: 'greatest-hoster-row' },
        h('a', { href: link.url, target: '_blank', rel: 'noopener noreferrer' }, `${link.label} ↗`),
        link.origin === 'queue title match' ? h('span', { class: 'muted small' }, 'Queue title match · verify edition') : null,
        me.admin ? h('span', { class: 'muted small' }, job ? `In scraper · ${job.status.replaceAll('_', ' ')}` : state?.available === false ? 'Queue status unavailable' : 'Not in scraper queue') : null,
        me.admin && state?.available !== false ? queueButton(item, link.url, job) : null));
    }
    if (me.admin) {
      if (state?.available === false) panel.append(h('p', { class: 'small error' }, `Scraper status unavailable: ${state.error || 'unknown error'}. Queue actions are disabled.`));
      const message = h('span', { class: 'small', role: 'status' });
      const search = h('button', { class: 'btn small', type: 'button', onclick: async () => {
        search.disabled = true; message.textContent = 'Looking up MangaDex titles…';
        try {
          const found = await api(`api/greatest/mangadex-search?id=${encodeURIComponent(item.id)}`);
          message.textContent = '';
          const results = h('div', { class: 'greatest-hoster-results' });
          for (const candidate of found.results || []) {
            const existing = jobs.find(job => job.source === 'mangadex' && job.seriesId === candidate.url.split('/').at(-1));
            results.append(h('div', { class: 'greatest-hoster-row' },
              h('a', { href: candidate.url, target: '_blank', rel: 'noopener noreferrer' }, `${candidate.title}${candidate.year ? ` (${candidate.year})` : ''} ↗`),
              existing ? h('span', { class: 'muted small' }, `In scraper · ${existing.status}`) : null,
              state?.available !== false ? queueButton(item, candidate.url, existing) : null));
          }
          if (!found.results?.length) results.append(h('p', { class: 'muted small' }, 'No MangaDex candidates found.'));
          panel.append(h('p', { class: 'muted small' }, 'Search candidates are not verified matches. Check title, year, and edition before adding.'), results);
        } catch (error) { message.textContent = error.message || String(error); }
        finally { search.disabled = false; }
      } }, 'Search MangaDex');
      const refresh = h('button', { class: 'btn small', type: 'button', onclick: () => refreshHosters(item, panel) }, 'Refresh queue status');
      panel.append(h('div', { class: 'greatest-hoster-tools' }, search,
        h('a', { class: 'btn small', href: 'https://weebcentral.com/search', target: '_blank', rel: 'noopener noreferrer' }, 'Search WeebCentral ↗'),
        refresh, message));
      const manual = h('input', { type: 'url', placeholder: 'Paste a MangaDex or WeebCentral series URL', 'aria-label': 'Series URL' });
      const add = h('button', { class: 'btn small', type: 'button', disabled: state?.available === false, onclick: () => inspectUrl(item, manual.value, add, message, panel) }, 'Add URL to scraper');
      panel.append(h('div', { class: 'greatest-hoster-tools' }, manual, add));
    }
  }

  function queueButton(item, url, job) {
    return h('button', { class: 'btn small', type: 'button', disabled: !!job,
      title: job ? `Already in scraper: ${job.status}` : 'Queue an inspection; confirm in Admin → Scraper before downloading',
      onclick: async event => {
        const panel = event.currentTarget.closest('.greatest-hoster-panel');
        await inspectUrl(item, url, event.currentTarget, null, panel);
      } }, job ? 'Already added' : 'Add to scraper');
  }

  async function inspectUrl(item, url, button, message, panel) {
    button.disabled = true;
    try {
      await api('api/admin/scraper', { command: 'enqueue', url: String(url || '').trim(), title: item.title,
        metadataSearch: item.title, libraryMangaId: item.library?.id, scope: { mode: 'missing' },
        existingPolicy: 'skip-any', inspect: true });
      if (message) message.textContent = 'Added for inspection. Confirm any download in Admin → Scraper.';
      sourceCache.delete(item.id);
      await refreshHosters(item, panel);
    } catch (error) {
      if (message) message.textContent = error.message || String(error);
      else alert(error.message || String(error));
      button.disabled = false;
    }
  }

  function matches(item, q) {
    if (q && !`${item.title} ${item.note || ''}`.toLowerCase().includes(q)) return false;
    if (filterMode === 'rated') return !!item.myRating;
    if (filterMode === 'unrated') return !item.myRating;
    if (filterMode === 'owned') return !!item.library;
    if (['flame', 'good', 'neutral', 'skip'].includes(filterMode)) return item.myRating === filterMode;
    return true;
  }

  function render() {
    mine.classList.toggle('on', sortMode === 'mine'); everyone.classList.toggle('on', sortMode === 'all');
    mine.setAttribute('aria-pressed', String(sortMode === 'mine'));
    everyone.setAttribute('aria-pressed', String(sortMode === 'all'));
    for (const [value, button] of filterButtons) {
      button.classList.toggle('on', filterMode === value);
      button.setAttribute('aria-pressed', String(filterMode === value));
    }
    results.textContent = '';
    const q = query.value.trim().toLowerCase();
    let visible = 0;
    for (const period of data.periods) {
      const items = data.entries.filter(item => item.period === period && matches(item, q));
      if (!items.length) continue;
      items.sort((a, b) => sortMode === 'all'
        ? b.score - a.score || a.rank - b.rank
        : (ratingScore(b.myRating) - ratingScore(a.myRating)) || a.rank - b.rank);
      visible += items.length;
      results.append(h('section', { class: 'greatest-period' },
        h('div', { class: 'greatest-period-heading' }, h('h2', {}, period), h('span', { class: 'muted small' }, `${items.length} manga`)),
        h('div', { class: 'greatest-grid' }, items.map(tile))));
    }
    count.textContent = `${visible} of ${data.entries.length} manga · ${sortMode === 'all' ? 'community score' : 'your vote'} within each period`;
    if (!visible) results.append(h('p', { class: 'empty muted' }, 'No manga match these filters.'));
  }
  function ratingScore(value) { return { flame: 3, good: 1, neutral: 0, skip: -2 }[value] ?? -3; }
  render();
})();