// ==UserScript==
// @name         镂空拖挂头标注
// @namespace    lh6v.trailer-head.mark-guard
// @version      1.0.1
// @description  2D 图像标注页实时校验：nut / pillar / base_nut / base / lockring_center / lockring 六个类别各限出现一次，总数不超过 6 个，可少不可多；不合规时拦截保存与提交。
// @author       CC
// @match        *://*/w/task.html*
// @match        *://*/w/task-angle.html*
// @match        *://*/w/task-check.html*
// @run-at       document-start
// @grant        none
// @noframes
// ==/UserScript==

/* eslint-disable no-empty */
(function () {
  'use strict';

  // ────────────────────────────────────────────────────────────────────────────
  /* ==RULES-BEGIN== */
  /** 允许出现的六个类别（顺序即面板展示顺序），pname 与服务端 mark-conf 返回的 class.pname 逐字一致 */
  var CLASSES = [
    { pname: 'nut', label: 'nut（插梢上面的螺帽）' },
    { pname: 'pillar', label: 'pillar（插销）' },
    { pname: 'base_nut', label: 'base_nut（基座上的螺帽）' },
    { pname: 'base', label: 'base（基座）' },
    { pname: 'lockring_center', label: 'lockring_center（锁环中心）' },
    { pname: 'lockring', label: 'lockring（锁环）' }
  ];
  var MAX_TOTAL = 6;

  var ALLOWED = Object.create(null);
  var LABEL = Object.create(null);
  CLASSES.forEach(function (c) {
    ALLOWED[c.pname] = true;
    LABEL[c.pname] = c.label;
  });

  function labelOf(pname) {
    return LABEL[pname] || pname;
  }

  /**
   * 取一个标注物的类别名。
   * 标注器「实时态」把 class 存成数组（canvas-common.js: mark.class = [classes[i]]），
   * 「保存/接口态」是对象 {pname, preset_id}（submitClick 里做了归一化）。两种都要兼容。
   */
  function pnameOf(mark) {
    if (!mark) return '';
    var c = mark.class;
    if (Array.isArray(c)) {
      if (!c.length) return '';
      var last = c[c.length - 1];
      if (!last) return '';
      if (typeof last === 'string') return last;
      return last.pname || '';
    }
    if (typeof c === 'string') return c;
    if (c && typeof c === 'object') return c.pname || '';
    return '';
  }

  /**
   * 校验一组 marks。
   * 规则：① 每个允许的类别最多出现一次；② 总数不超过 6；③ 不允许出现六类之外的类别（含未选择类别）。
   *      可以少。
   */
  function validate(marks) {
    var arr = Array.isArray(marks) ? marks : [];
    var counts = Object.create(null);
    CLASSES.forEach(function (c) { counts[c.pname] = 0; });

    var items = arr.map(function (m, i) {
      return {
        index: i + 1,
        pname: pnameOf(m),
        markId: m && m.markId,
        type: m && m.type
      };
    });

    var unknown = [];
    items.forEach(function (it) {
      if (ALLOWED[it.pname]) counts[it.pname]++;
      else unknown.push(it);
    });

    var issues = [];

    CLASSES.forEach(function (c) {
      if (counts[c.pname] > 1) {
        var idx = items
          .filter(function (it) { return it.pname === c.pname; })
          .map(function (it) { return it.index; });
        issues.push({
          kind: 'duplicate',
          pname: c.pname,
          indexes: idx,
          text: '「' + labelOf(c.pname) + '」重复出现 ' + idx.length + ' 次（第 ' + idx.join('、') + ' 个标注物）'
        });
      }
    });

    unknown.forEach(function (it) {
      issues.push({
        kind: 'unknown',
        pname: it.pname,
        indexes: [it.index],
        text: it.pname
          ? '第 ' + it.index + ' 个标注物的类别「' + it.pname + '」不属于允许的 6 个类别'
          : '第 ' + it.index + ' 个标注物还没有选择类别'
      });
    });

    if (items.length > MAX_TOTAL) {
      issues.push({
        kind: 'overflow',
        pname: '',
        indexes: items.map(function (it) { return it.index; }),
        text: '标注物共 ' + items.length + ' 个，超过上限 ' + MAX_TOTAL + ' 个'
      });
    }

    return {
      ok: issues.length === 0,
      total: items.length,
      counts: counts,
      items: items,
      issues: issues,
      badIndexes: (function () {
        var s = Object.create(null);
        issues.forEach(function (is) {
          is.indexes.forEach(function (i) { s[i] = true; });
        });
        return Object.keys(s).map(Number).sort(function (a, b) { return a - b; });
      })()
    };
  }
  /* ==RULES-END== */

  // ────────────────────────────────────────────────────────────────────────────
  // 2. 平台适配层（唯一与本站点耦合的部分）
  // ────────────────────────────────────────────────────────────────────────────

  var MARK_DATA_URL_RE = /\/v2\/tasks\/mark-data(\?|$)/;

  function jq() {
    return window.jQuery || window.$ || null;
  }

  /** 标注器实时数据：window.InitCanvasInfo.canvasCommon.bg_img.marks（service-mark.js 里挂到 window 的） */
  function readLiveMarks() {
    try {
      var ci = window.InitCanvasInfo;
      var cc = ci && ci.canvasCommon;
      var bg = cc && cc.bg_img;
      if (bg && Array.isArray(bg.marks)) return bg.marks;
    } catch (e) {}
    try {
      var ci2 = window.InitCanvasInfo;
      var cc2 = ci2 && ci2.canvasNormal;
      var bg2 = cc2 && cc2.bg_img;
      if (bg2 && Array.isArray(bg2.marks)) return bg2.marks;
    } catch (e) {}
    return null;
  }

  function liveConnected() {
    return readLiveMarks() !== null;
  }

  /** 高亮右侧标注物列表里出问题的条目 */
  function locateBadMarks(badIndexes) {
    var $ = jq();
    if (!$ || !badIndexes || !badIndexes.length) return;
    $('#toolBarList li').removeClass('lh6v-bad');
    var first = null;
    badIndexes.forEach(function (i) {
      var $li = $('#toolBarList li[data-index="' + i + '"]');
      if ($li.length) {
        $li.addClass('lh6v-bad');
        if (!first) first = $li;
      }
    });
    if (first && first[0] && first[0].scrollIntoView) {
      try { first[0].scrollIntoView({ block: 'nearest' }); } catch (e) {}
    }
  }

  function clearBadMarks() {
    var $ = jq();
    if ($) $('#toolBarList li').removeClass('lh6v-bad');
  }

  function hideLoaders() {
    var $ = jq();
    if (!$) return;
    try { $('#load').hide(); } catch (e) {}
    try { $('#loadup').hide(); } catch (e) {}
  }

  // ────────────────────────────────────────────────────────────────────────────
  // 3. 配置
  // ────────────────────────────────────────────────────────────────────────────

  var CFG_KEY = 'lh6v.cfg.v1';
  var CFG = {
    blockSave: true,     // 拦截「暂时保存」等手动保存
    blockSubmit: true,   // 拦截「提交 / 继续提交」
    blockAuto: false,    // 拦截自动保存（默认关闭，避免丢数据）
    locate: true,        // 拦截后自动定位并高亮问题标注物
    allowForce: true,    // 是否在拦截弹窗里保留「强制保存」入口
    x: null,
    y: null,
    collapsed: false
  };

  function loadCfg() {
    try {
      var raw = localStorage.getItem(CFG_KEY);
      if (!raw) return;
      var o = JSON.parse(raw);
      Object.keys(CFG).forEach(function (k) {
        if (o[k] !== undefined) CFG[k] = o[k];
      });
    } catch (e) {}
  }
  function saveCfg() {
    try { localStorage.setItem(CFG_KEY, JSON.stringify(CFG)); } catch (e) {}
  }
  loadCfg();

  // ────────────────────────────────────────────────────────────────────────────
  // 4. 界面（Shadow DOM，避免与本页 CSS 互相污染）
  // ────────────────────────────────────────────────────────────────────────────

  var host = null, root = null;
  var el = {};
  var toastTimer = null;

  var PANEL_CSS = [
    ':host{all:initial}',
    '*{box-sizing:border-box;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}',
    '.wrap{position:fixed;z-index:2147483000;width:268px;background:#fff;border:1px solid #d8dee6;border-radius:10px;',
    'box-shadow:0 8px 28px rgba(15,23,42,.18);font-size:12px;color:#1f2937;overflow:hidden;user-select:none}',
    '.hd{display:flex;align-items:center;gap:6px;padding:8px 10px;background:#1f2937;color:#fff;cursor:move}',
    '.hd .t{flex:1;font-size:12px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}',
    '.hd .b{border:0;background:transparent;color:#cbd5e1;cursor:pointer;font-size:13px;line-height:1;padding:2px 3px;border-radius:4px}',
    '.hd .b:hover{background:rgba(255,255,255,.15);color:#fff}',
    '.st{padding:7px 10px;font-weight:600;display:flex;align-items:center;gap:6px;border-bottom:1px solid #eef2f7}',
    '.st.ok{background:#ecfdf5;color:#047857}',
    '.st.bad{background:#fef2f2;color:#b91c1c}',
    '.st.warn{background:#fffbeb;color:#b45309}',
    '.st .cnt{margin-left:auto;font-weight:500;font-size:11px;opacity:.85}',
    '.rows{padding:4px 0}',
    '.row{display:flex;align-items:center;gap:6px;padding:4px 10px;line-height:1.35}',
    '.row .nm{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}',
    '.row .pin{width:16px;text-align:center;font-weight:700}',
    '.row.v1{color:#047857}',
    '.row.v1 .pin{color:#059669}',
    '.row.v0{color:#9ca3af}',
    '.row.v0 .pin{color:#d1d5db}',
    '.row.vbad{background:#fef2f2;color:#b91c1c;font-weight:600}',
    '.row.vbad .pin{color:#dc2626}',
    '.row .idx{font-size:10px;color:#9ca3af;font-weight:400}',
    '.row.vbad .idx{color:#ef4444}',
    '.msg{margin:2px 8px 6px;padding:6px 8px;background:#fef2f2;border:1px solid #fecaca;border-radius:6px;color:#b91c1c;font-size:11px;line-height:1.5;max-height:132px;overflow:auto;user-select:text}',
    '.msg div+div{margin-top:3px}',
    '.ft{display:flex;align-items:center;gap:8px;padding:6px 10px;border-top:1px solid #eef2f7;background:#f9fafb;font-size:11px;color:#6b7280}',
    '.ft a{color:#2563eb;cursor:pointer;text-decoration:none}',
    '.ft a:hover{text-decoration:underline}',
    '.set{padding:8px 10px;border-top:1px solid #eef2f7;background:#f9fafb;display:none}',
    '.set.on{display:block}',
    '.set label{display:flex;align-items:center;gap:6px;padding:3px 0;cursor:pointer;color:#374151}',
    '.set input{accent-color:#2563eb}',
    '.toast{position:fixed;z-index:2147483001;left:50%;bottom:48px;transform:translateX(-50%);background:rgba(17,24,39,.94);',
    'color:#fff;padding:8px 14px;border-radius:8px;font-size:12px;max-width:70vw;line-height:1.5;box-shadow:0 6px 20px rgba(0,0,0,.3)}',
    '.mask{position:fixed;z-index:2147483002;inset:0;background:rgba(15,23,42,.45);display:flex;align-items:center;justify-content:center}',
    '.dlg{width:460px;max-width:92vw;max-height:82vh;background:#fff;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.35);overflow:hidden;display:flex;flex-direction:column}',
    '.dlg .dh{padding:12px 16px;background:#fef2f2;border-bottom:1px solid #fecaca;color:#b91c1c;font-weight:700;font-size:14px;display:flex;align-items:center;gap:8px}',
    '.dlg .db{padding:14px 16px;overflow:auto;font-size:13px;line-height:1.65;color:#374151;user-select:text}',
    '.dlg .db ul{margin:6px 0 0;padding-left:20px}',
    '.dlg .db li{margin:4px 0}',
    '.dlg .db .hint{margin-top:10px;color:#6b7280;font-size:12px}',
    '.dlg .df{padding:10px 16px;border-top:1px solid #eef2f7;display:flex;gap:8px;align-items:center;justify-content:flex-end;background:#f9fafb}',
    '.dlg button{border:1px solid #d1d5db;background:#fff;color:#374151;padding:6px 14px;border-radius:6px;cursor:pointer;font-size:13px}',
    '.dlg button:hover{background:#f3f4f6}',
    '.dlg button.pri{background:#2563eb;border-color:#2563eb;color:#fff}',
    '.dlg button.pri:hover{background:#1d4ed8}',
    '.dlg .force{margin-right:auto;font-size:12px;color:#9ca3af;text-decoration:underline;cursor:pointer;background:none;border:0;padding:0}',
    '.dlg .force:hover{color:#b91c1c}'
  ].join('');

  function buildPanel() {
    host = document.createElement('div');
    host.id = 'lh6v-host';
    host.style.cssText = 'all:initial;display:block';
    root = host.attachShadow({ mode: 'open' });

    var style = document.createElement('style');
    style.textContent = PANEL_CSS;
    root.appendChild(style);

    var wrap = document.createElement('div');
    wrap.className = 'wrap';
    wrap.innerHTML = [
      '<div class="hd" data-drag>',
      '  <span class="t">六类唯一性校验</span>',
      '  <button class="b" data-act="set" title="设置">⚙</button>',
      '  <button class="b" data-act="fold" title="收起/展开">–</button>',
      '</div>',
      '<div data-body>',
      '  <div class="st" data-st><span data-st-icon>·</span><span data-st-text>正在连接标注器…</span><span class="cnt" data-st-cnt></span></div>',
      '  <div class="rows" data-rows></div>',
      '  <div class="msg" data-msg style="display:none"></div>',
      '  <div class="set" data-set>',
      '    <label><input type="checkbox" data-cfg="blockSave"> 拦截手动保存（暂时保存）</label>',
      '    <label><input type="checkbox" data-cfg="blockSubmit"> 拦截提交</label>',
      '    <label><input type="checkbox" data-cfg="blockAuto"> 拦截自动保存（可能丢数据）</label>',
      '    <label><input type="checkbox" data-cfg="locate"> 拦截后定位问题标注物</label>',
      '    <label><input type="checkbox" data-cfg="allowForce"> 弹窗保留「强制保存」入口</label>',
      '    <div style="margin-top:5px;color:#9ca3af;font-size:10px;line-height:1.5" data-diag></div>',
      '  </div>',
      '  <div class="ft"><span data-mode>实时校验</span><a data-act="recheck">重新校验</a></div>',
      '</div>'
    ].join('');
    root.appendChild(wrap);

    // 初次定位
    wrap.style.left = (CFG.x != null ? CFG.x : Math.max(8, window.innerWidth - 288)) + 'px';
    wrap.style.top = (CFG.y != null ? CFG.y : 96) + 'px';

    el.wrap = wrap;
    el.st = wrap.querySelector('[data-st]');
    el.stIcon = wrap.querySelector('[data-st-icon]');
    el.stText = wrap.querySelector('[data-st-text]');
    el.stCnt = wrap.querySelector('[data-st-cnt]');
    el.rows = wrap.querySelector('[data-rows]');
    el.msg = wrap.querySelector('[data-msg]');
    el.set = wrap.querySelector('[data-set]');
    el.diag = wrap.querySelector('[data-diag]');
    el.mode = wrap.querySelector('[data-mode]');
    el.body = wrap.querySelector('[data-body]');

    // 六行固定结构，后续只改 class / 文本
    CLASSES.forEach(function (c) {
      var row = document.createElement('div');
      row.className = 'row v0';
      row.setAttribute('data-pname', c.pname);
      row.innerHTML =
        '<span class="pin">○</span>' +
        '<span class="nm" title="' + c.pname + '">' + c.label + '</span>' +
        '<span class="idx"></span>';
      el.rows.appendChild(row);
    });

    // 拖动
    var dragging = null;
    wrap.querySelector('[data-drag]').addEventListener('mousedown', function (ev) {
      if (ev.target.closest('button')) return;
      dragging = { dx: ev.clientX - wrap.offsetLeft, dy: ev.clientY - wrap.offsetTop };
      ev.preventDefault();
    });
    window.addEventListener('mousemove', function (ev) {
      if (!dragging) return;
      var x = Math.min(Math.max(0, ev.clientX - dragging.dx), window.innerWidth - 60);
      var y = Math.min(Math.max(0, ev.clientY - dragging.dy), window.innerHeight - 30);
      wrap.style.left = x + 'px';
      wrap.style.top = y + 'px';
    });
    window.addEventListener('mouseup', function () {
      if (!dragging) return;
      dragging = null;
      CFG.x = parseInt(wrap.style.left, 10);
      CFG.y = parseInt(wrap.style.top, 10);
      saveCfg();
    });

    // 按钮
    wrap.addEventListener('click', function (ev) {
      var t = ev.target.closest('[data-act]');
      if (t) {
        var act = t.getAttribute('data-act');
        if (act === 'fold') {
          CFG.collapsed = !CFG.collapsed;
          saveCfg();
          applyCollapsed();
        } else if (act === 'set') {
          el.set.classList.toggle('on');
        } else if (act === 'recheck') {
          tick(true);
        }
        return;
      }
      var cb = ev.target.closest('input[data-cfg]');
      if (cb) {
        CFG[cb.getAttribute('data-cfg')] = cb.checked;
        saveCfg();
      }
    });

    // 同步 checkbox
    wrap.querySelectorAll('input[data-cfg]').forEach(function (inp) {
      inp.checked = !!CFG[inp.getAttribute('data-cfg')];
    });

    applyCollapsed();
    (document.body || document.documentElement).appendChild(host);
  }

  function applyCollapsed() {
    if (!el.body) return;
    el.body.style.display = CFG.collapsed ? 'none' : '';
  }

  function toast(text, ms) {
    if (!root) return;
    var old = root.querySelector('.toast');
    if (old) old.remove();
    var d = document.createElement('div');
    d.className = 'toast';
    d.textContent = text;
    root.appendChild(d);
    clearTimeout(toastTimer);
    toastTimer = setTimeout(function () { d.remove(); }, ms || 2600);
  }

  function highlightCss() {
    if (document.getElementById('lh6v-page-css')) return;
    var s = document.createElement('style');
    s.id = 'lh6v-page-css';
    s.textContent =
      '#toolBarList li.lh6v-bad{outline:2px solid #dc2626 !important;outline-offset:-2px;' +
      'background:rgba(220,38,38,.12) !important;animation:lh6v-blink 1s ease-in-out 3}' +
      '@keyframes lh6v-blink{0%,100%{background:rgba(220,38,38,.12)}50%{background:rgba(220,38,38,.4)}}';
    (document.head || document.documentElement).appendChild(s);
  }

  // 拦截弹窗
  var dlgNode = null;
  function closeDialog() {
    if (dlgNode) { dlgNode.remove(); dlgNode = null; }
  }
  function showBlockDialog(res, onForce) {
    closeDialog();
    var mask = document.createElement('div');
    mask.className = 'mask';
    var items = res.issues.map(function (i) { return '<li>' + escapeHtml(i.text) + '</li>'; }).join('');
    var dlg = document.createElement('div');
    dlg.className = 'dlg';
    dlg.innerHTML =
      '<div class="dh">⚠ 标注数据不合规，已阻止保存</div>' +
      '<div class="db">' +
      '  <div>本图的标注物必须满足：六个类别（' + CLASSES.map(function (c) { return c.pname; }).join(' / ') +
      '）各最多一个，总数不超过 ' + MAX_TOTAL + ' 个，可少不可多。</div>' +
      '  <ul>' + items + '</ul>' +
      '  <div class="hint">当前共 ' + res.total + ' 个标注物。请删除或修正后再保存。</div>' +
      '</div>' +
      '<div class="df">' +
      (CFG.allowForce ? '<button class="force" data-force>仍要强制保存（不推荐）</button>' : '') +
      '<button data-locate>定位问题标注物</button>' +
      '<button class="pri" data-ok>返回修改</button>' +
      '</div>';
    mask.appendChild(dlg);
    root.appendChild(mask);
    dlgNode = mask;

    dlg.addEventListener('click', function (ev) {
      if (ev.target.closest('[data-ok]')) { closeDialog(); return; }
      if (ev.target.closest('[data-locate]')) { locateBadMarks(res.badIndexes); return; }
      if (ev.target.closest('[data-force]')) { closeDialog(); onForce(); return; }
    });
  }

  function escapeHtml(s) {
    return String(s).replace(/[&<>"']/g, function (c) {
      return { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[c];
    });
  }

  // ────────────────────────────────────────────────────────────────────────────
  // 5. 面板刷新
  // ────────────────────────────────────────────────────────────────────────────

  var lastRes = null;

  function render(res, connected) {
    lastRes = res;

    // 状态条
    var cls, icon, text;
    if (!connected) {
      cls = 'warn'; icon = '?';
      text = '未读到标注器数据';
    } else if (res.ok) {
      cls = 'ok'; icon = '✓';
      text = res.total === 0 ? '暂无标注物（合规）' : '合规';
    } else {
      cls = 'bad'; icon = '✕';
      text = '不合规 · ' + res.issues.length + ' 项问题';
    }
    el.st.className = 'st ' + cls;
    el.stIcon.textContent = icon;
    el.stText.textContent = text;
    el.stCnt.textContent = connected ? res.total + ' / ' + MAX_TOTAL : '';

    // 六行
    CLASSES.forEach(function (c) {
      var row = el.rows.querySelector('.row[data-pname="' + c.pname + '"]');
      if (!row) return;
      var n = res.counts[c.pname] || 0;
      var idx = res.items
        .filter(function (it) { return it.pname === c.pname; })
        .map(function (it) { return it.index; });
      var v;
      if (!connected) v = 'v0';
      else if (n === 0) v = 'v0';
      else if (n === 1) v = 'v1';
      else v = 'vbad';
      row.className = 'row ' + v;
      row.querySelector('.pin').textContent = n === 0 ? '○' : (n === 1 ? '●' : '✕');
      row.querySelector('.idx').textContent = n === 0 ? '未标注' : ('×' + n + '  第' + idx.join('/') + '个');
    });

    // 问题清单
    if (connected && !res.ok) {
      el.msg.style.display = '';
      el.msg.innerHTML = res.issues.map(function (i) {
        return '<div>· ' + escapeHtml(i.text) + '</div>';
      }).join('');
    } else {
      el.msg.style.display = 'none';
      el.msg.innerHTML = '';
    }

    // 诊断
    el.diag.textContent =
      '数据源 ' + (connected ? 'window.InitCanvasInfo.canvasCommon.bg_img.marks' : '未连接') +
      ' ｜ 保存钩子 ' + (ajaxPatched ? '已安装' : '未安装');

    el.mode.textContent = '实时校验';
  }

  var rafPending = false;
  function tick(force) {
    if (!el.rows) return;
    var marks = readLiveMarks();
    var connected = marks !== null;
    var res = validate(marks || []);
    render(res, connected);
    if (force && !connected) toast('没读到标注器数据，请确认当前页是 /w/task.html 标注页');
    return res;
  }

  // ────────────────────────────────────────────────────────────────────────────
  // 6. AJAX 拦截
  // ────────────────────────────────────────────────────────────────────────────

  var ajaxPatched = false;
  var lastGesture = 0;

  ['mousedown', 'pointerdown', 'touchstart', 'keydown'].forEach(function (ev) {
    window.addEventListener(ev, function () { lastGesture = Date.now(); }, true);
  });

  function isManual() {
    return Date.now() - lastGesture < 3000;
  }

  function parseBody(data) {
    if (!data) return null;
    if (typeof data === 'string') {
      try { return JSON.parse(data); } catch (e) { return null; }
    }
    if (typeof data === 'object') return data;
    return null;
  }

  /**
   * 返回 null 表示放行；返回 {res, mode:'block'|'warn'} 表示校验不通过。
   */
  function inspect(settings) {
    var type = String(settings.type || settings.method || 'GET').toUpperCase();
    if (type !== 'POST') return null;
    var url = String(settings.url || '');
    if (!MARK_DATA_URL_RE.test(url)) return null;

    var body = parseBody(settings.data);
    if (!body || !body.markData || !Array.isArray(body.markData.marks)) return null;

    var res = validate(body.markData.marks);
    if (res.ok) {
      if (CFG.locate) clearBadMarks();
      return { res: res, mode: 'ok' };
    }

    var action = String(body.action || '');
    var manual = isManual();
    var auto = !manual;

    var block;
    if (action === 'submit') block = CFG.blockSubmit;
    else if (auto) block = CFG.blockAuto;
    else block = CFG.blockSave;

    return { res: res, mode: block ? 'block' : 'warn', action: action, auto: auto };
  }

  function makeStub(settings, verdict) {
    var stub = {
      readyState: 0,
      status: 0,
      statusText: 'blocked-by-lh6v',
      abort: function () {},
      done: function () { return stub; },
      fail: function (cb) { return stub; },
      always: function (cb) { return stub; },
      then: function () { return stub; }
    };
    // 走一遍 error 回调，让调用方（commonAjax）自己收尾隐藏 loading
    setTimeout(function () {
      try {
        if (typeof settings.error === 'function') {
          settings.error({ status: 0, statusText: 'blocked', responseText: '' }, 'blocked', '');
        }
      } catch (e) {}
      hideLoaders();
      var $ = jq();
      if ($) { try { $('#load').hide(); } catch (e) {} }
    }, 0);
    return stub;
  }

  function installAjaxHook() {
    if (ajaxPatched) return true;
    var $ = jq();
    if (!$ || typeof $.ajax !== 'function') return false;

    var orig = $.ajax;
    var wrapped = function (url, options) {
      var self = this;
      var args = arguments;
      var settings;
      if (typeof url === 'string') settings = Object.assign({}, options, { url: url });
      else settings = Object.assign({}, url);

      var v = inspect(settings);
      if (v && v.mode === 'block') {
        var res = v.res;
        hideLoaders();
        if (CFG.locate) locateBadMarks(res.badIndexes);
        showBlockDialog(res, function () {
          // 强制保存：直接走原始 $.ajax，绕开本脚本的校验
          orig.apply(self, args);
        });
        return makeStub(settings, v);
      }
      if (v && v.mode === 'warn') {
        if (CFG.locate) locateBadMarks(v.res.badIndexes);
        toast('⚠ 自动保存：' + v.res.issues[0].text, 5000);
      }
      return orig.apply(this, arguments);
    };

    $.ajax = wrapped;
    ajaxPatched = true;
    return true;
  }

  // 等 jQuery 出现（本页 jQuery 在 body 末尾、bundle 之前加载）
  var hookTimer = setInterval(function () {
    if (installAjaxHook()) {
      clearInterval(hookTimer);
      hookTimer = null;
      tick(true);
    }
  }, 50);
  setTimeout(function () {
    if (hookTimer) { clearInterval(hookTimer); hookTimer = null; }
    installAjaxHook();
  }, 30000);

  // ────────────────────────────────────────────────────────────────────────────
  // 7. 启动
  // ────────────────────────────────────────────────────────────────────────────

  function boot() {
    if (host) return;
    if (!document.body) return; // 等 body 出现
    highlightCss();
    buildPanel();
    tick(true);
    setInterval(function () {
      if (rafPending) return;
      rafPending = true;
      requestAnimationFrame(function () { rafPending = false; tick(false); });
    }, 450);
  }

  var bootTimer = setInterval(function () {
    boot();
    if (host) { clearInterval(bootTimer); bootTimer = null; }
  }, 60);
  setTimeout(function () {
    if (bootTimer) { clearInterval(bootTimer); bootTimer = null; }
    boot();
  }, 20000);

  // 供人工排查
  window.__lh6v = {
    version: '1.0.1',
    cfg: CFG,
    classes: CLASSES.slice(),
    validate: validate,
    pnameOf: pnameOf,
    readLiveMarks: readLiveMarks,
    tick: function () { return tick(true); }
  };
})();