// ==UserScript==
// @name         F95 BRATR Management Ratings Helper
// @namespace    Ryahn
// @version      1.4.2
// @description  Triage panel for /bratr-ratings/management: highlight low-effort reviews, filter, export CSV.
// @match        https://f95zone.to/bratr-ratings/management*
// @match        https://f95zone.to/bratr-ratings/*/management*
// @match        https://f95zone.to/threads/*/br-reviews/*
// @run-at       document-idle
// @grant        GM_setClipboard
// ==/UserScript==
(function () {
  const $ = (sel, root=document) => root.querySelector(sel);
  const $$ = (sel, root=document) => Array.from(root.querySelectorAll(sel));
  const text = el => (el ? el.textContent.replace(/\s+/g,' ').trim() : '');
  const getRating = el => {
    const rs = el.querySelector('.ratingStars.bratr-rating');
    if (!rs) return null;
    const t = rs.getAttribute('title') || '';
    const m = t.match(/([\d.]+)\s*star/i);
    if (m) return parseFloat(m[1]);
    return rs.querySelectorAll('.ratingStars-star--full').length || null;
  };
  const csvEscape = s => `"${(s||'').replace(/"/g,'""')}"`;
  const avg = arr => arr.length ? arr.reduce((a,b)=>a+b,0)/arr.length : 0;
  const truncate = (s, n=80) => (s.length > n ? s.slice(0, n-1) + '…' : s);

  // Scrape reviews on page; stash stable index i for row->DOM mapping
  const reviews = $$('.message--review').map((msg, i) => {
    const main = msg.querySelector('.contentRow-main');
    const authorA = main?.querySelector('.contentRow-header a.username');
    const author = text(authorA);
    const rating = getRating(main);
    const threadA = main?.querySelector('dl.pairs dd a');
    const thread = text(threadA);
    const threadUrl = threadA?.href || '';
    const timeEl = main?.querySelector('time.u-dt');
    const timeIso = timeEl?.getAttribute('datetime') || '';
    const timeTxt = timeEl?.getAttribute('title') || text(timeEl);

    // Body excluding spoiler contents
    const bodyEl = main?.querySelector('article .bbWrapper');
    let bodyTxt = '';
    if (bodyEl) {
      const clone = bodyEl.cloneNode(true);
      clone.querySelectorAll('.bbCodeSpoiler-content').forEach(s => s.remove());
      bodyTxt = text(clone);
    }

    const deleted = msg.classList.contains('message--deleted');
    const links = {
      report: main?.querySelector('a.actionBar-action--report')?.href || '',
      edit:   main?.querySelector('a.actionBar-action--edit')?.href || '',
      del:    main?.querySelector('a.actionBar-action--delete')?.href || '',
      warn:   main?.querySelector('a.actionBar-action--warn')?.href || ''
    };

    // Raw vs effective length (collapse punctuation carpets)
    const rawLen = (bodyTxt || '').length;
    const effBody = (bodyTxt || '')
      .replace(/([.!?…,_\-])\1{2,}/g, '$1$1')   // collapse carpets to 2
      .replace(/\s{2,}/g, ' ')
      .trim();
    const effLen = effBody.length;

    return { i, node: msg, author, rating, thread, threadUrl, timeIso, timeTxt, bodyTxt, rawLen, effLen, deleted, links };
  });

  // Cliché patterns with labels
  const cliché = [
    { label: 'good game',         rx: /\bgood game\b/i },
    { label: 'very good',         rx: /\bit was very good\b/i },
    { label: 'amazing',           rx: /\bamazing!?(\b|$)/i },
    { label: 'top N',             rx: /\btop\s+\d+\b/i },
    { label: 'pretty sex scenes', rx: /\bpretty sex scenes\b/i },
    { label: 'downloads flex',    rx: /\bdownload(ed)? hundreds of games\b/i },
    { label: 'mentions 200 (char rule)', rx: /\b200(?:\s*[- ]?(?:char(?:s|acters?)?|word(?:s)?|limit|minimum|min))?\b/i }
  ];

  // Spam/bypass heuristics
  function analyzeSpam(body) {
    const reasons = [];
    const s = body || '';
    if (!s) return reasons;

    // Punctuation carpets: 6+ of the same mark
    const punctRuns = s.match(/([.!?…,_\-])\1{5,}/g) || [];
    if (punctRuns.length) {
      const totalRunChars = punctRuns.reduce((a,b)=>a+b.length,0);
      reasons.push({ code: 'SPAM', text: `DOTCARPET ×${punctRuns.length}`, tip: `Punctuation runs total ${totalRunChars} chars` });
    }

    // Punctuation ratio
    const punctChars = (s.match(/[^\w\s]/g) || []).length;
    const pRatio = s.length ? punctChars / s.length : 0;
    if (pRatio > 0.35 && s.length >= 120) {
      reasons.push({ code: 'SPAM', text: `PUNC ${Math.round(pRatio*100)}%`, tip: `Non-alphanumeric ratio ${Math.round(pRatio*100)}%` });
    }

    // Tokenization
    const tokens = s.toLowerCase().match(/[a-z0-9']+/g) || [];
    const totalTok = tokens.length;
    if (totalTok) {
      const freq = new Map();
      tokens.forEach(t => freq.set(t, (freq.get(t)||0)+1));
      const uniq = freq.size;
      const uniqRatio = uniq / totalTok;

      if (uniqRatio < 0.5 && totalTok >= 10) {
        reasons.push({ code: 'SPAM', text: `LOW_UNIQUE ${uniq}/${totalTok}`, tip: `Unique/token ratio ${uniqRatio.toFixed(2)}` });
      }

      // Single-word dominance
      let maxWord = '', maxCount = 0;
      for (const [w,c] of freq.entries()) if (c > maxCount) { maxCount = c; maxWord = w; }
      if (maxCount / totalTok > 0.4 && totalTok >= 8) {
        reasons.push({ code: 'SPAM', text: `REP "${truncate(maxWord,12)}" ×${maxCount}`, tip: `Word appears ${(maxCount/totalTok*100).toFixed(0)}% of tokens` });
      }

      // Repeated n-grams (bi/tri)
      function ngrams(n) {
        const m = new Map();
        for (let i=0;i<=tokens.length-n;i++){
          const g = tokens.slice(i,i+n).join(' ');
          m.set(g,(m.get(g)||0)+1);
        }
        return m;
      }
      [2,3].forEach(n => {
        const m = ngrams(n);
        for (const [g,c] of m.entries()) {
          if (c >= 3) {
            reasons.push({ code: 'SPAM', text: `REP${n} "${truncate(g,20)}" ×${c}`, tip: `Repeated ${n}-gram ${c} times` });
            break;
          }
        }
      });

      // Repeated very short sentences (<=4 words) 3+ times
      const sentences = s.split(/(?<=[.!?])\s+/);
      const shortFreq = new Map();
      sentences.forEach(x => {
        const toks = (x.toLowerCase().match(/[a-z0-9']+/g) || []);
        if (toks.length && toks.length <= 4) {
          const key = toks.join(' ');
          shortFreq.set(key, (shortFreq.get(key)||0)+1);
        }
      });
      for (const [key,c] of shortFreq.entries()) {
        if (c >= 3) {
          reasons.push({ code: 'SPAM', text: `SHORT_SENT "${truncate(key,18)}" ×${c}`, tip: `Short sentence repeated ${c} times` });
          break;
        }
      }
    }
    return reasons;
  }

  // Diagnose low-effort
  function diagnoseLowEffort(r, cutoff=200) {
    const reasons = [];
    const body = r.bodyTxt || '';

    if (!r.deleted && (r.effLen || 0) < cutoff) {
      reasons.push({
        code: 'LEN',
        text: `LEN ${r.effLen}<${cutoff}`,
        tip: `Effective length ${r.effLen} is below cutoff ${cutoff}`
      });
    }

    if (!r.deleted) {
      cliché.forEach(c => {
        const m = body.match(c.rx);
        if (m) reasons.push({ code: 'CLICHÉ', text: `CLICHÉ: "${truncate(m[0], 28)}"`, tip: `Matched phrase: ${m[0]}` });
      });
    }

    analyzeSpam(body).forEach(sr => reasons.push(sr));

    if (r.deleted) reasons.push({ code: 'DELETED', text: 'DELETED', tip: 'Author deleted review' });

    const low = reasons.some(x => x.code === 'LEN' || x.code === 'CLICHÉ' || x.code === 'SPAM');
    return { low, reasons };
  }

  // Panel
  const panel = document.createElement('div');
  panel.id = 'bratr-helper';
  panel.innerHTML = `
    <div class="bh-head">
      <strong>BRATR Helper</strong>
      <span class="bh-metrics"></span>
      <button class="bh-collapse" title="Collapse">–</button>
    </div>
    <div class="bh-body">
      <div class="bh-controls">
        <label>Min ★ <input type="number" step="0.5" min="0" max="5" class="bh-minrating" value="0"></label>
        <label>Low-effort length cutoff <input type="number" min="0" class="bh-maxlen" value="200"></label>
        <label>User <input type="text" class="bh-user" placeholder="author contains"></label>
        <label>Date from <input type="datetime-local" class="bh-from"></label>
        <label>Date to <input type="datetime-local" class="bh-to"></label>
        <label><input type="checkbox" class="bh-lowonly" checked> Low-effort only</label>
        <button class="bh-copy">Copy CSV</button>
        <button class="bh-reset">Reset</button>
      </div>
      <div class="bh-table"></div>
    </div>
  `;
  document.body.appendChild(panel);

  // Styles (+ clickable rows + pulse highlight)
  const css = document.createElement('style');
  css.textContent = `
    #bratr-helper{position:fixed;right:12px;bottom:12px;width:780px;max-height:70vh;z-index:99999;
      background:#111;border:1px solid #333;border-radius:12px;color:#ddd;font:12px/1.4 system-ui;box-shadow:0 8px 24px rgba(0,0,0,.4)}
    #bratr-helper .bh-head{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;border-bottom:1px solid #2a2a2a}
    #bratr-helper .bh-head strong{font-size:13px}
    #bratr-helper .bh-metrics{opacity:.8}
    #bratr-helper .bh-collapse{background:#222;border:1px solid #444;border-radius:8px;color:#ddd;padding:2px 8px;cursor:pointer}
    #bratr-helper .bh-body{padding:8px}
    #bratr-helper .bh-controls{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}
    #bratr-helper .bh-controls label{display:flex;gap:6px;align-items:center;background:#161616;border:1px solid #2a2a2a;border-radius:8px;padding:4px 8px}
    #bratr-helper input{background:#0f0f0f;border:1px solid #333;color:#ddd;border-radius:6px;padding:3px 6px}
    #bratr-helper button.bh-copy,#bratr-helper button.bh-reset{background:#1e1e1e;border:1px solid #444;color:#ddd;border-radius:8px;padding:4px 10px;cursor:pointer}
    #bratr-helper .bh-table{overflow:auto;max-height:48vh;border:1px solid #2a2a2a;border-radius:8px}
    #bratr-helper table{width:100%;border-collapse:collapse}
    #bratr-helper th,#bratr-helper td{padding:6px 8px;border-bottom:1px solid #232323;vertical-align:top}
    #bratr-helper tr[data-i]{cursor:pointer}
    #bratr-helper tr[data-i]:hover td{background:#18130a}
    #bratr-helper tr.low td{background:rgba(255,180,0,.08)}
    #bratr-helper tr.deleted td{opacity:.65}
    #bratr-helper .pill{font-size:11px;display:inline-block;padding:1px 6px;border-radius:999px;border:1px solid #444;margin-right:6px;white-space:nowrap}
    #bratr-helper .pill.low{border-color:#f5b400;color:#f5b400}
    #bratr-helper .pill.one{border-color:#ff5b5b;color:#ff5b5b}
    #bratr-helper .pill.delet{border-color:#8aa;color:#8aa}
    #bratr-helper .pill.spam{border-color:#ff9d00;color:#ff9d00}
    #bratr-helper .links a{margin-right:8px}
    @keyframes bh-pulse {
      0% { box-shadow: 0 0 0 0 rgba(245,180,0,.6); }
      100% { box-shadow: 0 0 0 12px rgba(245,180,0,0); }
    }
    .bh-target-pulse { animation: bh-pulse 1s ease-out 0s 2; outline: 2px solid #f5b400 !important; }
    @media (max-width: 880px){#bratr-helper{left:8px;right:8px;width:auto}}
  `;
  document.head.appendChild(css);

  const ui = {
    min: panel.querySelector('.bh-minrating'),
    maxlen: panel.querySelector('.bh-maxlen'),
    user: panel.querySelector('.bh-user'),
    lowonly: panel.querySelector('.bh-lowonly'),
    from: panel.querySelector('.bh-from'),
    to: panel.querySelector('.bh-to'),
    table: panel.querySelector('.bh-table'),
    metrics: panel.querySelector('.bh-metrics')
  };

  panel.querySelector('.bh-collapse').addEventListener('click', () => {
    const body = panel.querySelector('.bh-body');
    if (body.style.display === 'none') { body.style.display = ''; panel.querySelector('.bh-collapse').textContent = '–'; }
    else { body.style.display = 'none'; panel.querySelector('.bh-collapse').textContent = '+'; }
  });
  panel.querySelector('.bh-reset').addEventListener('click', () => {
    ui.min.value = 0; ui.maxlen.value = 200; ui.user.value = ''; ui.lowonly.checked = true; ui.from.value = ''; ui.to.value = '';
    render();
  });
  ['input','change'].forEach(ev => {
    [ui.min, ui.maxlen, ui.user, ui.lowonly, ui.from, ui.to].forEach(el => el.addEventListener(ev, render));
  });

  function withinDates(iso, from, to) {
    if (!iso) return true;
    const t = new Date(iso).getTime();
    if (from && t < new Date(from).getTime()) return false;
    if (to && t > new Date(to).getTime()) return false;
    return true;
  }

  function currentRows() {
    const min = parseFloat(ui.min.value || '0');
    const maxlen = parseInt(ui.maxlen.value || '0', 10);
    const user = (ui.user.value || '').toLowerCase();
    const lowOnly = ui.lowonly.checked;
    const from = ui.from.value;
    const to = ui.to.value;

    return reviews.filter(r => {
      if (Number.isFinite(min) && r.rating != null && r.rating < min) return false;
      if (user && !r.author.toLowerCase().includes(user)) return false;
      if (from || to) { if (!withinDates(r.timeIso, from, to)) return false; }
      const diag = diagnoseLowEffort(r, maxlen);
      if (lowOnly && !diag.low) return false;
      return true;
    });
  }

  function render() {
    const maxlen = parseInt(ui.maxlen.value || '200', 10);
    const live = reviews.filter(r => !r.deleted);
    const lowCount = live.filter(r => diagnoseLowEffort(r, maxlen).low).length;
    const avgRating = avg(live.map(r => r.rating || 0)).toFixed(2);
    ui.metrics.textContent = `on page: ${reviews.length} • avg ★ ${avgRating} • low-effort flagged: ${lowCount}`;

    const rows = currentRows();
    const html = [`<table><thead><tr>
      <th>Author</th><th>★</th><th>Thread</th><th>When</th><th>Len</th><th>Flags (why)</th><th>Actions</th></tr></thead><tbody>`];

    rows.forEach(r => {
      const diag = diagnoseLowEffort(r, maxlen);
      const low = diag.low;
      const one = Math.round(r.rating||0) === 1;
      const cls = `${low ? 'low' : ''} ${r.deleted ? 'deleted': ''}`.trim();
      const flagHtml = diag.reasons.map(reason => {
        let pill = 'pill';
        if (reason.code === 'LEN' || reason.code === 'CLICHÉ') pill += ' low';
        if (reason.code === 'SPAM') pill += ' spam';
        if (reason.code === 'DELETED') pill += ' delet';
        const tip = reason.tip ? ` title="${reason.tip.replace(/"/g, '&quot;')}"` : '';
        return `<span class="${pill}"${tip}>${reason.text}</span>`;
      }).join('');
      html.push(`<tr class="${cls}" data-i="${r.i}">
        <td>${r.author || ''}</td>
        <td>${r.rating != null ? r.rating.toFixed(2) : ''}</td>
        <td><a href="${r.threadUrl}" target="_blank" rel="noreferrer">${r.thread || ''}</a></td>
        <td title="${r.timeIso || ''}">${r.timeTxt || ''}</td>
        <td>${r.effLen} <span title="raw ${r.rawLen} chars">(raw ${r.rawLen})</span></td>
        <td>${flagHtml || ''}${one ? '<span class="pill one" title="Rounded rating equals 1 star">1★</span>' : ''}</td>
        <td class="links">
          ${r.links.report ? `<a href="${r.links.report}" target="_blank">Report</a>` : ''}
          ${r.links.edit ? `<a href="${r.links.edit}" target="_blank">Edit</a>` : ''}
          ${r.links.del ? `<a href="${r.links.del}" target="_blank">Delete</a>` : ''}
          ${r.links.warn ? `<a href="${r.links.warn}" target="_blank">Warn</a>` : ''}
        </td>
      </tr>`);
    });

    html.push(`</tbody></table>`);
    ui.table.innerHTML = html.join('');

    // Bind row click delegation exactly once and keep it
    if (!ui.table._bhBound) {
      ui.table.addEventListener('click', onRowClick);
      ui.table._bhBound = true;
    }
    retint();
  }

  function onRowClick(e) {
    if (e.target.closest('a, button')) return; // let links/buttons behave
    const tr = e.target.closest('tr[data-i]');
    if (!tr) return;
    const idx = parseInt(tr.getAttribute('data-i'), 10);
    const r = reviews[idx];
    if (!r || !r.node) return;

    // Smooth scroll and pulse
    r.node.scrollIntoView({ behavior: 'smooth', block: 'center' });
    r.node.classList.remove('bh-target-pulse');
    void r.node.offsetWidth; // reflow to restart animation
    r.node.classList.add('bh-target-pulse');
    setTimeout(() => r.node.classList.remove('bh-target-pulse'), 1800);
  }

  // Tint live page with reasons as tooltip
  function retint() {
    const maxlen = parseInt(ui.maxlen?.value || '200', 10);
    reviews.forEach(r => {
      if (r.deleted) {
        r.node.style.outline = '';
        r.node.removeAttribute('title');
        return;
      }
      const diag = diagnoseLowEffort(r, maxlen);
      r.node.style.outline = '';
      r.node.removeAttribute('title');
      if (diag.low) {
        r.node.style.outline = '2px solid #f5b400';
        const tips = diag.reasons
          .filter(x => x.code === 'LEN' || x.code === 'CLICHÉ' || x.code === 'SPAM')
          .map(x => x.text).join(' | ');
        if (tips) r.node.setAttribute('title', tips);
      }
    });
  }

  render();

  // Copy CSV of current view, with reasons column
  panel.querySelector('.bh-copy').addEventListener('click', () => {
    const rows = currentRows();
    const maxlen = parseInt(ui.maxlen?.value || '200', 10);
    const header = ['author','rating','thread','threadUrl','timeIso','effLen','rawLen','deleted','low','reasons','body'];
    const lines = [header.join(',')];
    rows.forEach(r => {
      const diag = diagnoseLowEffort(r, maxlen);
      const reasonFlat = diag.reasons.map(x => x.text).join(' | ');
      lines.push([
        csvEscape(r.author),
        r.rating ?? '',
        csvEscape(r.thread),
        csvEscape(r.threadUrl),
        csvEscape(r.timeIso),
        r.effLen ?? '',
        r.rawLen ?? '',
        r.deleted ? '1' : '0',
        diag.low ? '1' : '0',
        csvEscape(reasonFlat),
        csvEscape((r.bodyTxt || '').slice(0,3000))
      ].join(','));
    });
    const csv = lines.join('\n');
    try { GM_setClipboard(csv, { type: 'text', mimetype: 'text/csv' }); }
    catch { navigator.clipboard?.writeText(csv); }
  });
})();