// ==UserScript==
// @name         上岸村机考·专项练习暂停
// @namespace    http://tampermonkey.net/
// @version      1.0.2
// @description  给专项练习与全真模拟加一颗暂停/继续计时按钮，不怕有急事、可以练质量。
// @license      MIT
// @match        https://pub.xdtech.top/mingshi/wxpage/tiku/gongan/zhuanxiang.html*
// @match        https://pub.xdtech.top/*/wxpage/tiku/gongan/zhuanxiang.html*
// @match        https://pub.xdtech.top/mingshi/wxpage/tiku/gongan/practice.html*
// @match        https://pub.xdtech.top/*/wxpage/tiku/gongan/practice.html*
// @include      *://*.xdtech.top/*/wxpage/tiku/gongan/zhuanxiang.html*
// @include      *://*.xdtech.top/*/wxpage/tiku/gongan/practice.html*
// @grant        none
// @run-at       document-idle
// ==/UserScript==

(function () {
  'use strict';

  var CSS = [
    '.remain-time{width:auto!important}',
    '.gth-timer-btn{box-sizing:border-box;display:inline-flex;align-items:center;justify-content:center;',
    'height:30px;line-height:30px;padding:0 30px;margin-left:8px;border:0;border-radius:5px;',
    'background:#fff;color:#2178db;font-size:16px;cursor:pointer;vertical-align:middle;user-select:none}',
    '.gth-timer-btn .gth-timer-ic{width:18px;height:18px;flex:0 0 auto}',
    '.gth-timer-btn .gth-timer-ic svg{width:100%;height:100%;display:block}',
    '.gth-timer-btn:hover{background:#d8e9fa}',
    '.gth-timer-btn.paused{background:#f59e0b;color:#fff}',
    '.gth-timer-btn.paused:hover{background:#d97706}',
    '.gth-timer-btn.dead{background:#5b6b7d;color:#dbe6f2;border:1px dashed rgba(255,255,255,.55)}',
    '.remain-time.gth-paused a{color:#fde68a}',
    '.remain-time.gth-paused a::after{content:"（已暂停）";font-size:13px}'
  ].join('');

  var LUCIDE = {
    pause: '<rect x="5" y="3" width="5" height="18" rx="1"/><rect x="14" y="3" width="5" height="18" rx="1"/>',
    play: '<path d="M5 5a2 2 0 0 1 3.008-1.728l11.997 6.998a2 2 0 0 1 .003 3.458l-12 7A2 2 0 0 1 5 19z"/>'
  };

  function icon(name) {
    var d = LUCIDE[name];
    if (!d) return '';
    return '<span class="gth-timer-ic" aria-hidden="true"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor"' +
      ' stroke-width="2" stroke-linecap="round" stroke-linejoin="round">' + d + '</svg></span>';
  }

  var paused = false;
  var dead = '';
  var scope = null;
  var restored = false;
  var ngSrc = '';
  var ngErr = '';
  var scopeCount = 0;
  var valveOn = 0;
  var valveWanted = 0;
  var holdSeen = null;
  var warned = '';
  var storeErr = '';
  var lastSig = '';
  var frozenText = '';
  var domTimer = null;
  var running = false;
  var lastTotal = -1;

  var SID = '';
  try { SID = new URLSearchParams(location.search).get('submit_id') || ''; } catch (e) { SID = ''; }
  var LS_KEY = 'gth_timer_paused_' + (SID || location.pathname);

  function errName(e) { return e && e.name ? e.name : String(e); }

  function store(v) {
    try {
      if (v) localStorage.setItem(LS_KEY, '1');
      else localStorage.removeItem(LS_KEY);
      storeErr = '';
    } catch (e) { storeErr = '本地存储写不进（暂停状态刷新后不保留）：' + errName(e); }
  }
  function stored() {
    try { return localStorage.getItem(LS_KEY) === '1'; }
    catch (e) { storeErr = '本地存储读不出（当作未暂停）：' + errName(e); return false; }
  }

  function pad2(x) { return (x < 10 ? '0' : '') + x; }
  function hms(n) {
    if (typeof n !== 'number' || !(n >= 0)) return '--:--:--';
    return pad2(Math.floor(n / 3600)) + ':' + pad2(Math.floor(n % 3600 / 60)) + ':' + pad2(n % 60);
  }

  function pickNg(w) {
    return (w && w.angular && typeof w.angular.element === 'function') ? w.angular : null;
  }

  function pageNg() {
    var wins = [
      ['window', typeof window === 'undefined' ? null : window],
      ['unsafeWindow', typeof unsafeWindow === 'undefined' ? null : unsafeWindow]
    ];
    var i, ng = null;
    for (i = 0; i < wins.length; i++) {
      ng = pickNg(wins[i][1]);
      if (ng) { ngSrc = wins[i][0]; ngErr = ''; return ng; }
    }
    if (typeof angular !== 'undefined' && angular && typeof angular.element === 'function') {
      ngSrc = 'angular';
      ngErr = '';
      return angular;
    }
    ngSrc = '';
    return null;
  }

  function eachTimerScope(fn) {
    var ng = pageNg();
    scopeCount = 0;
    if (!ng) { ngErr = 'window / unsafeWindow / 裸 angular 三条路上都没有 angular'; return false; }
    var root;
    try { root = ng.element(document.body).injector().get('$rootScope'); }
    catch (e) { ngErr = '拿不到 $rootScope：' + (e && e.message ? e.message : String(e)); return false; }
    if (!root) { ngErr = '$rootScope 是空的'; return false; }
    var seen = new WeakSet();
    (function walk(s) {
      if (!s || seen.has(s)) return;
      seen.add(s);
      if (Object.prototype.hasOwnProperty.call(s, 'localStorage') && s.localStorage &&
        typeof s.localStorage === 'object' && ('allInterval' in s || 'partInterval' in s)) {
        fn(s);
        scopeCount++;
      }
      for (var c = s.$$childHead; c; c = c.$$nextSibling) walk(c);
    })(root);
    if (!scopeCount) ngErr = '页面上没有 localStorage + allInterval 形状的计时器 scope';
    return scopeCount > 0;
  }

  function guard(obj, key) {
    if (!obj || typeof obj !== 'object' || !(key in obj)) return '';
    var d = Object.getOwnPropertyDescriptor(obj, key);
    if (!d) return '';
    if (d.get) return 'on';
    if (!d.configurable) return '';
    var cur = obj[key];
    Object.defineProperty(obj, key, {
      configurable: true,
      enumerable: true,
      get: function () { return cur; },
      set: function (v) { if (!paused) cur = v; }
    });
    return 'new';
  }

  function mainValve() {
    var ls = scope && scope.localStorage;
    if (!ls) return false;
    var d = Object.getOwnPropertyDescriptor(ls, 'totalTime');
    return !!(d && d.get);
  }

  function installGuards() {
    var scopes = [];
    if (scope) scopes.push(scope);
    eachTimerScope(function (s) { scopes.push(s); });
    var seenS = new WeakSet();
    valveOn = 0;
    valveWanted = 0;
    scopes.forEach(function (s) {
      if (!s || seenS.has(s)) return;
      seenS.add(s);
      var ls = s.localStorage || {};
      var pairs = [[ls, 'totalTime'], [ls, 'elapsed_time']];
      (ls.partData || []).forEach(function (p) {
        pairs.push([p, 'remainTime']);
        pairs.push([p, 'elapsed_time']);
      });
      Object.keys(s.detail_elapsed_time || {}).forEach(function (k) {
        pairs.push([s.detail_elapsed_time, k]);
      });
      pairs.forEach(function (pair) {
        valveWanted++;
        if (guard(pair[0], pair[1])) valveOn++;
      });
    });
    return valveOn;
  }

  function holdReason() {
    var ls = scope && scope.localStorage;
    if (!ls) return '页面计时器 scope 不在了';
    if (!mainValve()) return '阀门没挂在 totalTime 上';
    var v = ls.totalTime;
    if (typeof v !== 'number') return 'totalTime 不是数字';
    if (holdSeen !== null && v !== holdSeen) return '暂停期间 totalTime 仍在变，还有第二条时钟';
    holdSeen = v;
    return '';
  }

  function warnDead() {
    if (warned === dead) return;
    warned = dead;
    console.warn('[计时暂停] ' + dead);
  }

  function release() {
    paused = false;
    holdSeen = null;
    freezeDom(false);
    store(false);
  }

  function applyPause(on) {
    if (!on) {
      dead = '';
      release();
      render();
      return;
    }
    paused = true;
    holdSeen = null;
    installGuards();
    dead = holdReason();
    if (dead) {
      release();
      warnDead();
    } else {
      freezeDom(true);
      store(true);
    }
    render();
  }

  function btn() { return document.querySelector('.gth-timer-btn'); }

  function timerHost() {
    return document.querySelector('.operation-dati .remain-time') ||
      document.querySelector('.remain-time');
  }

  function diag() {
    var s = '取页:' + (ngSrc || '没拿到');
    if (ngErr) s += '（' + ngErr + '）';
    s += ' · 计时器' + scopeCount + '台 · 阀门' + valveOn + '/' + valveWanted;
    if (paused) s += ' · 冻在 ' + hms(holdSeen);
    if (storeErr) s += ' · ' + storeErr;
    return s;
  }

  function label() {
    if (dead) return '不可暂停';
    return paused ? icon('play') : icon('pause');
  }

  function tip() {
    if (dead) return '取不到页面计时器，本页不可暂停：' + dead + '　·　' + diag();
    return paused ? '已冻结，可以放心离开' : '点这里冻结计时';
  }

  function pausedClass() { return !!(paused && !dead); }

  function render() {
    var b = btn();
    if (!b) return;
    var host = timerHost();
    var sig = [paused ? '1' : '0', dead, host ? 'h' : '-', pausedClass() ? 'p' : '-', diag()].join('|');
    if (sig === lastSig) return;
    lastSig = sig;
    b.className = 'gth-timer-btn' + (paused ? ' paused' : '') + (dead ? ' dead' : '');
    b.innerHTML = label();
    b.title = tip();
    if (host) host.classList.toggle('gth-paused', pausedClass());
  }

  function ensureBtn() {
    var host = timerHost();
    if (!host) return;
    var b = btn();
    if (b) {
      if (b.parentNode !== host) host.appendChild(b);
      return;
    }
    b = document.createElement('button');
    b.type = 'button';
    b.className = 'gth-timer-btn';
    b.addEventListener('click', function (e) {
      e.preventDefault();
      e.stopPropagation();
      applyPause(!paused);
    });
    host.appendChild(b);
    lastSig = '';
  }

  function remainAnchor() { return document.querySelector('.remain-time a'); }

  function remainText() {
    var a = remainAnchor();
    return a ? (a.textContent || '') : '';
  }

  function timeTextNode() {
    var a = remainAnchor();
    if (!a) return null;
    var i, c;
    for (i = 0; i < a.childNodes.length; i++) {
      c = a.childNodes[i];
      if (c.nodeType === 3 && /\d{1,2}:\d{2}:\d{2}/.test(c.nodeValue)) return c;
    }
    for (i = 0; i < a.childNodes.length; i++) {
      c = a.childNodes[i];
      if (c.nodeType === 3) return c;
    }
    return null;
  }

  function freezeDom(on) {
    if (domTimer) { clearInterval(domTimer); domTimer = null; }
    frozenText = '';
    if (!on) return;
    var n = timeTextNode();
    if (!n) return;
    frozenText = n.nodeValue;
    domTimer = setInterval(function () {
      var nn = timeTextNode();
      if (nn && frozenText && nn.nodeValue !== frozenText) nn.nodeValue = frozenText;
    }, 150);
  }

  function domSeconds() {
    var m = remainText().match(/(\d{1,2}):(\d{2}):(\d{2})/);
    if (!m) return -1;
    return (+m[1]) * 3600 + (+m[2]) * 60 + (+m[3]);
  }

  function findScope() {
    var want = domSeconds();
    var best = null;
    var bestScore = -1;
    eachTimerScope(function (s) {
      var t = s.localStorage.totalTime;
      var score = 0;
      if (typeof t === 'number') {
        if (want >= 0 && Math.abs(t - want) <= 2) score = 1e6;
        else if (want >= 0) score = 1e5 - Math.min(Math.abs(t - want), 9999);
        else score = t;
      }
      if (score > bestScore) { best = s; bestScore = score; }
    });
    return best;
  }

  function live() {
    var s = scope;
    var t = (s && s.localStorage) ? s.localStorage.totalTime : -1;
    if (s && lastTotal >= 0 && typeof t === 'number' && t < lastTotal) running = true;
    lastTotal = typeof t === 'number' ? t : -1;
    var parentAllTime = s && s.$parent && typeof s.$parent.allTime === 'string' ? s.$parent.allTime : '';
    var segs = remainText().match(/(\d{1,2}:\d{2}:\d{2})/g) || [];
    var domLive = segs.some(function (seg) { return seg !== '00:00:00'; });
    return running || !!(s && s.allInterval) ||
      (typeof t === 'number' && t > 60) ||
      (parentAllTime.length > 0 && !/00:00:00/.test(parentAllTime)) ||
      domLive;
  }

  function tick() {
    var s = findScope();
    if (s !== scope) {
      scope = s;
      restored = false;
      running = false;
      lastTotal = -1;
      holdSeen = null;
    }
    if (scope && scope.$$destroyed) { scope = null; restored = false; }
    if (scope && scope.isAlreadySubmit) {
      if (paused || stored()) release();
      dead = '';
      var old = btn();
      if (old) old.remove();
      return;
    }
    if (!timerHost()) return;
    ensureBtn();
    var isLive = live();
    render();
    if (!isLive) return;
    if (!restored) {
      restored = true;
      if (stored()) applyPause(true);
    }
    if (paused) {
      installGuards();
      dead = holdReason();
      if (dead) {
        release();
        warnDead();
      }
    }
    render();
  }

  var st = document.createElement('style');
  st.textContent = CSS;
  document.head.appendChild(st);

  tick();
  setInterval(tick, 1000);
})();