// ==UserScript==
// @name         一键评教（蚌医版）
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  教学评价一键批量打分，自动逐门评价并提交
// @author       jasminenJohn
// @license      MIT
// @match        *://byjw.bbmu.edu.cn/*
// @grant        none
// @run-at       document-idle
// ==/UserScript==

(function () {
  'use strict';

  var CFG = {
    stateKey: 'bbmuPJ.state',
    pulseKey: 'bbmuPJ.pulse',
    aliveKey: 'bbmuPJ.alive',
    clickDelay: 1200,
    fillDelay: 900,
    submitDelay: 900,
    reloadDelay: 1800,
    submitTimeout: 25000,
    maxRounds: 300,
    grades: ['优', '良', '中', '差'],
    secondRate: 0.25
  };

  function loadState() {
    try { return JSON.parse(localStorage.getItem(CFG.stateKey)) || {}; }
    catch (e) { return {}; }
  }
  function saveState(patch) {
    var s = Object.assign(loadState(), patch);
    localStorage.setItem(CFG.stateKey, JSON.stringify(s));
    return s;
  }

  var state = Object.assign({ running: false, mode: 'random', done: 0, rounds: 0 }, loadState());

  function sleep(ms) { return new Promise(function (r) { setTimeout(r, ms); }); }
  function txt(el) { return (el.textContent || el.value || '').replace(/\s/g, ''); }
  function isVisible(el) {
    var r = el.getBoundingClientRect();
    return r.width > 0 && r.height > 0;
  }

  function findEvalLinks() {
    var nodes = document.querySelectorAll('a, button, span[onclick], td[onclick]');
    return Array.prototype.filter.call(nodes, function (el) {
      return txt(el) === '评价' && isVisible(el);
    });
  }

  function collectRadioGroups() {
    var radios = Array.prototype.filter.call(
      document.querySelectorAll('input[type=radio]'), isVisible);
    var groups = {};
    radios.forEach(function (r) {
      var key = r.name || 'g' + Math.random();
      (groups[key] = groups[key] || []).push(r);
    });
    return Object.keys(groups).map(function (k) { return groups[k]; })
      .filter(function (g) { return g.length >= 2; });
  }

  function isListPage() {
    if (!findEvalLinks().length) return false;
    var bt = document.body ? document.body.innerText : '';
    return /提交教学评价表|评价轮次|评价类型/.test(bt);
  }

  function isFormPage() {
    if (collectRadioGroups().length < 3) return false;
    var bt = document.body ? document.body.innerText : '';
    return bt.indexOf('优') > -1 && bt.indexOf('良') > -1 && bt.indexOf('差') > -1;
  }

  function fireEvents(el) {
    ['input', 'change'].forEach(function (t) {
      el.dispatchEvent(new Event(t, { bubbles: true }));
    });
  }

  function radioGradeText(r) {
    if (r.id) {
      var lab = document.querySelector('label[for="' + CSS.escape(r.id) + '"]');
      if (lab) return txt(lab);
    }
    var wrap = r.closest('label');
    if (wrap) return txt(wrap);
    var t = '', n = r.nextSibling;
    while (n && t.length < 4) {
      t += (n.textContent || '').trim();
      n = n.nextSibling;
    }
    if (t) return t;
    return r.parentElement ? txt(r.parentElement) : '';
  }

  function sortByGrade(group) {
    function rank(r) {
      var t = radioGradeText(r);
      for (var i = 0; i < CFG.grades.length; i++) {
        if (t.indexOf(CFG.grades[i]) > -1) return i;
      }
      return 99;
    }
    var ranked = group.map(function (r) { return { r: r, k: rank(r) }; });
    if (ranked.every(function (x) { return x.k === 99; })) return group;
    return ranked.sort(function (a, b) { return a.k - b.k; })
      .map(function (x) { return x.r; });
  }

  function pickRadio(group, mode) {
    var sorted = sortByGrade(group);
    var target = sorted[0];
    if (mode === 'random' && sorted.length > 1 && Math.random() < CFG.secondRate) {
      target = sorted[1];
    }
    target.checked = true;
    fireEvents(target);
    target.click();
  }

  function fillForm(mode) {
    var groups = collectRadioGroups();
    groups.forEach(function (g) { pickRadio(g, mode); });
    Array.prototype.forEach.call(document.querySelectorAll('textarea'), function (ta) {
      if (isVisible(ta) && !ta.value.trim()) {
        ta.value = '老师教学认真负责，讲解清晰，收获很大。';
        fireEvents(ta);
      }
    });
    return groups.length;
  }

  function findSubmitBtn() {
    var cands = Array.prototype.filter.call(
      document.querySelectorAll('button, input[type=button], input[type=submit], a'),
      function (el) { return isVisible(el) && !el.disabled; });
    var exact = cands.filter(function (el) { return txt(el) === '提交'; })[0];
    if (exact) return exact;
    return cands.filter(function (el) {
      return /^(确认提交|保存并提交)$/.test(txt(el));
    })[0] || null;
  }

  function armAutoConfirm() {
    try { window.confirm = function () { return true; }; } catch (e) {}
    try { window.alert = function () {}; } catch (e) {}
    var tries = 0;
    var timer = setInterval(function () {
      var sels = ['.layui-layer-btn0', '.bootbox .btn-primary',
        '.modal.in .btn-primary', '.modal.show .btn-primary'];
      for (var i = 0; i < sels.length; i++) {
        var b = document.querySelector(sels[i]);
        if (b && isVisible(b)) { b.click(); clearInterval(timer); return; }
      }
      if (++tries > 12) clearInterval(timer);
    }, 400);
  }

  function sendPulse() {
    localStorage.setItem(CFG.pulseKey, JSON.stringify({ t: Date.now() }));
  }

  var formHandled = false;

  function autoFillAndSubmit() {
    if (formHandled) return;
    formHandled = true;
    sleep(CFG.fillDelay).then(function () {
      if (!loadState().running) { formHandled = false; return; }
      fillForm(loadState().mode);
      return sleep(CFG.submitDelay).then(function () {
        if (!loadState().running) return;
        var btn = findSubmitBtn();
        if (!btn) {
          saveState({ running: false, error: '找不到提交按钮' });
          return;
        }
        armAutoConfirm();
        saveState({ done: (loadState().done || 0) + 1 });
        btn.click();
        sendPulse();
      });
    });
  }

  var watchdog = null;

  function clearWatchdog() {
    if (watchdog) { clearTimeout(watchdog); watchdog = null; }
  }

  function clickNext() {
    state = loadState();
    if (!state.running) return;
    var links = findEvalLinks();
    setProgress('剩余 ' + links.length + ' 门 · 已完成 ' + state.done + ' 门');

    if (!links.length) {
      saveState({ running: false });
      setProgress('🎉 全部完成！共评价 ' + state.done + ' 门');
      renderRunning();
      return;
    }
    if (state.rounds >= CFG.maxRounds) {
      saveState({ running: false });
      setProgress('已达安全上限，自动停止');
      renderRunning();
      return;
    }
    saveState({ rounds: state.rounds + 1 });

    sleep(CFG.clickDelay).then(function () {
      if (!loadState().running) return;
      setProgress('正在评价第 ' + (loadState().done + 1) + ' 门…');
      links[0].click();
      clearWatchdog();
      watchdog = setTimeout(function () {
        if (loadState().running) {
          saveState({ running: false });
          setProgress('等待提交超时，已停止');
          renderRunning();
        }
      }, CFG.submitTimeout);
    });
  }

  function onPulse() {
    clearWatchdog();
    setProgress('第 ' + loadState().done + ' 门已提交 ✓ 刷新列表…');
    setTimeout(function () {
      if (loadState().running) location.reload();
    }, CFG.reloadDelay);
  }

  function startRun() {
    saveState({ running: true, done: 0, rounds: 0, error: '' });
    state = loadState();
    renderRunning();
    clickNext();
  }

  function stopRun() {
    saveState({ running: false });
    clearWatchdog();
    renderRunning();
    setProgress('已停止');
  }

  var UI_ID = 'bbmu-pj-panel';
  var $panel, $go, $progress;
  var pageRole = null;

  function injectStyles() {
    if (document.getElementById(UI_ID + '-style')) return;
    var P = '#' + UI_ID;
    var css = [
      P + ' {',
      '  --blue: #0A84FF; --blue-press: #0060DF;',
      '  --bg: rgba(255,255,255,0.72);',
      '  --text: #1d1d1f; --text2: #6e6e73;',
      '  --field: rgba(118,118,128,0.12);',
      '  position: fixed; right: 24px; bottom: 24px; z-index: 2147483646;',
      '  width: 280px; padding: 16px;',
      '  background: var(--bg);',
      '  -webkit-backdrop-filter: saturate(180%) blur(24px); backdrop-filter: saturate(180%) blur(24px);',
      '  border: 0.5px solid rgba(0,0,0,0.08);',
      '  border-radius: 20px;',
      '  box-shadow: 0 16px 48px rgba(0,0,0,0.18), 0 2px 8px rgba(0,0,0,0.08);',
      '  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", sans-serif;',
      '  color: var(--text); font-size: 13px; line-height: 1.45;',
      '}',
      '@media (prefers-color-scheme: dark) {',
      '  ' + P + ' {',
      '    --bg: rgba(28,28,30,0.8);',
      '    --text: #f5f5f7; --text2: #98989d;',
      '    --field: rgba(118,118,128,0.24);',
      '    border-color: rgba(255,255,255,0.1);',
      '  }',
      '}',
      P + '.pj-collapsed .pj-body { display: none; }',
      P + ' * { box-sizing: border-box; margin: 0; }',
      P + ' .pj-head { display: flex; align-items: center; gap: 10px; cursor: grab; user-select: none; }',
      P + ' .pj-head:active { cursor: grabbing; }',
      P + ' .pj-icon {',
      '  width: 32px; height: 32px; border-radius: 8px; flex: none;',
      '  background: linear-gradient(160deg, #34C759, #30B0C7);',
      '  display: flex; align-items: center; justify-content: center;',
      '  color: #fff; font-size: 16px; box-shadow: inset 0 -1px 2px rgba(0,0,0,.15);',
      '}',
      P + ' .pj-title { font-size: 15px; font-weight: 600; letter-spacing: -0.2px; }',
      P + ' .pj-sub { color: var(--text2); font-size: 11px; }',
      P + ' .pj-chev { margin-left: auto; color: var(--text2); font-size: 12px; transition: transform .3s; }',
      P + '.pj-collapsed .pj-chev { transform: rotate(180deg); }',
      P + ' .pj-body { margin-top: 13px; display: flex; flex-direction: column; gap: 11px; }',
      P + ' .pj-label { font-size: 11px; font-weight: 600; color: var(--text2); text-transform: uppercase; letter-spacing: .4px; margin-bottom: 5px; }',
      P + ' .pj-seg { display: flex; background: var(--field); border-radius: 9px; padding: 2px; }',
      P + ' .pj-seg button {',
      '  flex: 1; border: 0; background: transparent; border-radius: 7px;',
      '  padding: 6px 0; font: inherit; font-size: 12.5px; color: var(--text);',
      '  cursor: pointer; transition: all .2s;',
      '}',
      P + ' .pj-seg button.on { background: #fff; box-shadow: 0 1px 4px rgba(0,0,0,.12); font-weight: 600; }',
      '@media (prefers-color-scheme: dark) { ' + P + ' .pj-seg button.on { background: #636366; } }',
      P + ' .pj-go {',
      '  width: 100%; border: 0; border-radius: 12px; padding: 11px 0;',
      '  background: var(--blue); color: #fff; font: inherit; font-size: 14.5px; font-weight: 600;',
      '  cursor: pointer; letter-spacing: -0.1px; transition: transform .12s, background .2s;',
      '}',
      P + ' .pj-go:active { transform: scale(.97); background: var(--blue-press); }',
      P + ' .pj-go.stop { background: #FF3B30; }',
      P + ' .pj-progress { text-align: center; color: var(--text2); font-size: 11.5px; min-height: 15px; }',
      P + ' .pj-foot { text-align: center; color: var(--text2); font-size: 10px; opacity: .7; }'
    ].join('\n');
    var style = document.createElement('style');
    style.id = UI_ID + '-style';
    style.textContent = css;
    document.head.appendChild(style);
  }

  function makeDraggable(panel, handle) {
    var sx = 0, sy = 0, px = 0, py = 0, moved = false, dragging = false;

    handle.addEventListener('pointerdown', function (e) {
      dragging = true;
      moved = false;
      sx = e.clientX;
      sy = e.clientY;
      var r = panel.getBoundingClientRect();
      px = r.left;
      py = r.top;
      handle.setPointerCapture(e.pointerId);
    });

    handle.addEventListener('pointermove', function (e) {
      if (!dragging) return;
      var dx = e.clientX - sx, dy = e.clientY - sy;
      if (!moved && Math.abs(dx) < 4 && Math.abs(dy) < 4) return;
      moved = true;
      var x = Math.min(Math.max(px + dx, 8), window.innerWidth - panel.offsetWidth - 8);
      var y = Math.min(Math.max(py + dy, 8), window.innerHeight - 50);
      panel.style.left = x + 'px';
      panel.style.top = y + 'px';
      panel.style.right = 'auto';
      panel.style.bottom = 'auto';
    });

    handle.addEventListener('pointerup', function (e) {
      dragging = false;
      handle.releasePointerCapture(e.pointerId);
      if (!moved) panel.classList.toggle('pj-collapsed');
    });
  }

  function buildPanel(role) {
    if (document.getElementById(UI_ID)) return;
    injectStyles();

    var hint = role === 'list'
      ? '随机优良 = 大部分优 + 少量良，更自然'
      : '当前是评价表页，点按钮只处理本页';

    $panel = document.createElement('div');
    $panel.id = UI_ID;
    $panel.innerHTML =
      '<div class="pj-head">' +
        '<div class="pj-icon">✓</div>' +
        '<div>' +
          '<div class="pj-title">一键评教</div>' +
          '<div class="pj-sub">' + (role === 'list' ? '批量自动打分 · 可拖动' : '本页打分 · 可拖动') + '</div>' +
        '</div>' +
        '<div class="pj-chev">⌄</div>' +
      '</div>' +
      '<div class="pj-body">' +
        '<div>' +
          '<div class="pj-label">评分模式</div>' +
          '<div class="pj-seg">' +
            '<button data-mode="best">全部「优」</button>' +
            '<button data-mode="random">随机优良</button>' +
          '</div>' +
        '</div>' +
        '<button class="pj-go">' + (role === 'list' ? '开始批量评价' : '打分并提交本页') + '</button>' +
        '<div class="pj-progress"></div>' +
        '<div class="pj-foot">' + hint + '</div>' +
      '</div>';
    document.body.appendChild($panel);

    $go = $panel.querySelector('.pj-go');
    $progress = $panel.querySelector('.pj-progress');
    var segBtns = $panel.querySelectorAll('.pj-seg button');
    Array.prototype.forEach.call(segBtns, function (b) {
      b.classList.toggle('on', b.dataset.mode === state.mode);
      b.addEventListener('click', function () {
        saveState({ mode: b.dataset.mode });
        state = loadState();
        Array.prototype.forEach.call(segBtns, function (x) {
          x.classList.toggle('on', x === b);
        });
      });
    });

    makeDraggable($panel, $panel.querySelector('.pj-head'));

    $go.addEventListener('click', function () {
      state = loadState();
      if (role === 'list') {
        if (state.running) stopRun(); else startRun();
      } else {
        var n = fillForm(state.mode);
        setProgress('已打分 ' + n + ' 题');
        var btn = findSubmitBtn();
        if (btn) { armAutoConfirm(); btn.click(); }
        else setProgress('已打分 ' + n + ' 题，请手动提交');
      }
    });

    renderRunning();
  }

  function renderRunning() {
    if (!$go || pageRole !== 'list') return;
    var running = loadState().running;
    $go.textContent = running ? '停止' : '开始批量评价';
    $go.classList.toggle('stop', running);
  }

  function setProgress(msg) {
    if ($progress) $progress.textContent = msg;
  }

  var booted = false;

  function startHeartbeat() {
    localStorage.setItem(CFG.aliveKey, String(Date.now()));
    setInterval(function () {
      localStorage.setItem(CFG.aliveKey, String(Date.now()));
    }, 1500);
  }

  function boot() {
    if (booted) return;
    state = Object.assign(state, loadState());

    if (isListPage()) {
      booted = true;
      pageRole = 'list';
      startHeartbeat();
      buildPanel('list');
      window.addEventListener('storage', function (e) {
        if (e.key === CFG.pulseKey && loadState().running) onPulse();
      });
      if (state.running) {
        setProgress('继续自动评价…');
        setTimeout(clickNext, 1600);
      }
      return;
    }

    if (isFormPage()) {
      booted = true;
      pageRole = 'form';
      startHeartbeat();
      if (loadState().running) {
        autoFillAndSubmit();
      } else {
        buildPanel('form');
      }
    }
  }

  function mountBadge() {
    if (window !== window.top || document.getElementById(UI_ID + '-badge')) return;
    var badge = document.createElement('div');
    badge.id = UI_ID + '-badge';
    badge.style.cssText =
      'position:fixed;right:24px;bottom:24px;z-index:2147483645;' +
      'padding:9px 14px;border-radius:999px;' +
      'background:rgba(28,28,30,0.82);color:#fff;' +
      'font:12px -apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;' +
      'box-shadow:0 8px 24px rgba(0,0,0,.25);' +
      '-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);' +
      'pointer-events:none;letter-spacing:.2px';
    badge.textContent = '✓ 一键评教已加载 · 等待评价列表页…';
    (document.body || document.documentElement).appendChild(badge);

    var started = Date.now();
    var timer = setInterval(function () {
      var alive = Number(localStorage.getItem(CFG.aliveKey) || 0);
      if (Date.now() - alive < 5000) {
        badge.remove();
        clearInterval(timer);
        return;
      }
      if (Date.now() - started > 60000) {
        badge.textContent = '一键评教：未找到评价列表，请进入 教学评价 → 提交教学评价表';
        clearInterval(timer);
        setTimeout(function () { badge.remove(); }, 8000);
      }
    }, 1000);
  }

  setTimeout(mountBadge, 500);
  var attempts = 0;
  var bootTimer = setInterval(function () {
    if (!booted) boot();
    if (booted || ++attempts > 60) clearInterval(bootTimer);
  }, 1000);
  setTimeout(boot, 300);
})();