Hugging Face's logo

Spaces:
Lashtw
/
worldcloud
Running

App Files Community
worldcloud
File size: 22,192 Bytes
a7871cd
 
 
 
 
 
2a476a3
4376a27
c6445cb
2a476a3
 
 
a7871cd
 
4376a27
a7871cd
c6445cb
 
 
 
 
 
 
 
 
77b4f14
c6445cb
 
77b4f14
c6445cb
 
 
 
a7871cd
c6445cb
 
 
a7871cd
c6445cb
 
 
 
 
 
2a476a3
a7871cd
 
c6445cb
a7871cd
c6445cb
 
 
2a476a3
77b4f14
c6445cb
 
 
 
 
 
 
 
 
 
 
 
4376a27
c6445cb
 
 
 
 
4376a27
c6445cb
 
 
 
 
 
 
 
 
 
 
 
4376a27
a7871cd
c6445cb
4376a27
c6445cb
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4376a27
 
c6445cb
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4376a27
a7871cd
c6445cb
 
 
 
 
 
 
 
 
4376a27
 
c6445cb
 
 
4376a27
c6445cb
 
4376a27
c6445cb
 
 
 
4376a27
 
c6445cb
4376a27
c6445cb
 
4376a27
c6445cb
 
 
 
4376a27
 
 
a7871cd
c6445cb
 
 
 
 
 
4376a27
c6445cb
 
 
 
 
4376a27
 
c6445cb
 
4376a27
 
 
c6445cb
4376a27
c6445cb
4376a27
 
77b4f14
4376a27
 
 
 
 
 
 
 
a7871cd
 
 
c6445cb
77b4f14
c6445cb
 
 
 
4376a27
 
c6445cb
4376a27
 
a7871cd
 
 
 
4376a27
2a476a3
4376a27
c6445cb
 
 
4376a27
c6445cb
4376a27
 
 
 
 
2a476a3
 
 
 
c6445cb
 
 
 
 
a7871cd
 
77b4f14
a7871cd
c6445cb
a7871cd
47a200c
 
 
 
 
 
a7871cd
 
 
77b4f14
a7871cd
c6445cb
77b4f14
a7871cd
77b4f14
 
 
 
a7871cd
 
c6445cb
77b4f14
a7871cd
77b4f14
 
a7871cd
2a476a3
 
 
 
 
c6445cb
2a476a3
 
 
 
 
 
 
 
 
 
 
 
 
c6445cb
2a476a3
 
 
 
 
 
 
 
 
c6445cb
77b4f14
2a476a3
a7871cd
2a476a3
 
 
 
a7871cd
 
77b4f14
a7871cd
77b4f14
a7871cd
c6445cb
 
 
a7871cd
c6445cb
4376a27
2a476a3
c6445cb
a7871cd
 
 
 
2a476a3
c6445cb
 
47c5fee
c6445cb
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
a7871cd
 
c6445cb
a7871cd
 
2a476a3
 
 
 
a7871cd
 
 
77b4f14
 
a7871cd
c6445cb
 
 
 
a7871cd
 
 
c6445cb
a7871cd
2a476a3
c6445cb
77b4f14
a7871cd
 
 
77b4f14
c6445cb
 
 
 
 
a7871cd
77b4f14
 
 
a7871cd
2a476a3
77b4f14
a7871cd
 
 
 
 
77b4f14
 
a7871cd
 
2a476a3
77b4f14
 
a7871cd
 
2a476a3
77b4f14
c6445cb
a7871cd
c6445cb
a7871cd
2a476a3
77b4f14
a7871cd
 
 
2a476a3
77b4f14
 
c6445cb
 
77b4f14
c6445cb
 
77b4f14
c6445cb
77b4f14
a7871cd
c6445cb
 
 
a7871cd
2a476a3
77b4f14
c6445cb
 
 
a7871cd
c6445cb
 
 
 
a7871cd
 
2a476a3
c6445cb
2a476a3
c6445cb
a7871cd
2a476a3
c6445cb
2a476a3
 
c6445cb
 
 
a7871cd
2a476a3
c6445cb
4376a27
 
 
c6445cb
 
4376a27
 
 
 
 
 
 
 
 
 
 
 
 
c6445cb
4376a27
2a476a3
c6445cb
 
 
 
2a476a3
c6445cb
 
 
 
 
 
 
 
2a476a3
c6445cb
2a476a3
 
c6445cb
 
 
 
 
 
 
 
 
 
 
a7871cd
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
<!DOCTYPE html>
<html lang="zh-Hant">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>即時互動文字雲 - 教師主控端</title>

<script src="https://cdn.tailwindcss.com"></script>
<link href="https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700;800;900&display=swap" rel="stylesheet">
<script src="https://cdnjs.cloudflare.com/ajax/libs/qrcodejs/1.0.0/qrcode.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/wordcloud2.js/1.0.2/wordcloud2.min.js"></script>

<style>
  body {
    font-family: 'Noto Sans TC', sans-serif;
  }
  .overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
  }
  .overlay.active {
    display: flex;
  }
  /* Custom Scrollbar for list panels */
  ::-webkit-scrollbar {
    width: 6px;
    height: 6px;
  }
  ::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 8px;
  }
  ::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 8px;
  }
  ::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
  }
</style>
</head>
<body class="bg-slate-100 text-slate-800 h-screen overflow-hidden flex flex-col">

<div id="loading" class="fixed inset-0 bg-slate-900/80 text-white flex flex-col items-center justify-center z-[2000] transition-opacity duration-300">
  <div class="w-12 h-12 border-4 border-orange-500 border-t-transparent rounded-full animate-spin mb-4"></div>
  <p class="text-lg font-medium tracking-wider">正在載入文字雲系統...</p>
</div>

<div class="flex-1 flex flex-col lg:flex-row h-full overflow-hidden">

  <!-- ================= 左側：大畫布文字雲區域 ================= -->
  <main class="flex-1 flex flex-col p-4 lg:p-6 overflow-hidden relative min-h-0">
    
    <!-- 頂部資訊條：題目與總數統計 -->
    <header class="flex items-center justify-between bg-white px-6 py-3.5 rounded-2xl shadow-sm border border-slate-200/80 mb-4 shrink-0">
      <div class="flex items-center gap-3 overflow-hidden mr-4">
        <span class="text-xl">📌</span>
        <h2 id="questionDisplay" class="text-base sm:text-lg font-bold text-slate-700 truncate">
          等待教師發布題目...
        </h2>
      </div>
      <div class="flex items-center gap-2 bg-orange-50 px-4 py-1.5 rounded-xl border border-orange-200 shrink-0">
        <span class="text-xs sm:text-sm font-semibold text-orange-600">總詞彙數量</span>
        <span id="wordCount" class="text-lg sm:text-xl font-extrabold text-orange-600">0</span>
      </div>
    </header>

    <!-- Canvas 畫布容器 -->
    <div id="cloud-container" class="flex-1 bg-white rounded-2xl shadow-sm border border-slate-200/80 relative overflow-hidden flex items-center justify-center">
      <canvas id="word-canvas" class="w-full h-full cursor-pointer block"></canvas>
      
      <!-- 右下角開發者資訊標籤 -->
      <div class="absolute bottom-4 right-4 bg-white/90 backdrop-blur border border-slate-200/80 px-3.5 py-1.5 rounded-xl text-xs text-slate-500 shadow-sm z-10 flex items-center gap-2 select-none">
        <span>程式設計者：精華國中 藍星宇</span>
        <span class="text-slate-300">|</span>
        <a href="https://www.facebook.com/groups/1554372228718393" target="_blank" rel="noopener" class="text-blue-600 hover:underline font-medium">
          臉書社團：萬物皆數
        </a>
      </div>
    </div>

  </main>

  <!-- ================= 右側：控制中心工具欄 ================= -->
  <aside class="w-full lg:w-80 xl:w-96 bg-white border-t lg:border-t-0 lg:border-l border-slate-200 p-5 flex flex-col justify-between gap-5 overflow-y-auto shrink-0 z-20">
    
    <!-- 上半部：標題、QR Code 與發布區域 -->
    <div class="space-y-5">
      <!-- 標頭列 -->
      <div class="flex items-center justify-between border-b border-slate-100 pb-3">
        <div class="flex items-center gap-2">
          <span class="text-2xl">☁️</span>
          <div>
            <h1 class="text-lg font-bold text-slate-800 leading-tight">文字雲主控端</h1>
            <p class="text-xs text-slate-400">即時互動與詞彙視覺化工具</p>
          </div>
        </div>
        <div class="bg-orange-500 text-white font-black text-sm px-3 py-1 rounded-xl shadow-sm">
          房號:<span id="roomCodeDisplay">----</span>
        </div>
      </div>

      <!-- QR Code 掃碼加入區 -->
      <div class="bg-slate-50 border border-slate-200/80 rounded-2xl p-4 flex flex-col items-center">
        <p class="text-xs font-semibold text-slate-500 mb-2">學生掃描加入</p>
        <div class="p-2.5 bg-white rounded-xl border border-slate-200 shadow-sm mb-3">
          <div id="qrcode" class="flex justify-center items-center"></div>
        </div>
        
        <div class="grid grid-cols-2 gap-2 w-full">
          <button id="btnCopyLink" class="px-3 py-2 bg-white hover:bg-slate-100 border border-slate-200 text-slate-700 text-xs font-semibold rounded-xl transition-all shadow-sm flex items-center justify-center gap-1">
            📋 複製連結
          </button>
          <button id="btnOpenGuest" class="px-3 py-2 bg-white hover:bg-slate-100 border border-slate-200 text-slate-700 text-xs font-semibold rounded-xl transition-all shadow-sm flex items-center justify-center gap-1">
            🔗 開啟學員端
          </button>
        </div>
      </div>

      <!-- 發布討論題目 -->
      <div class="space-y-2">
        <label for="questionInput" class="text-xs font-bold text-slate-600 block">設定討論題目</label>
        <div class="flex gap-2">
          <input id="questionInput" type="text" placeholder="輸入題目，學生端同步顯示..." class="flex-1 px-3 py-2 text-sm bg-slate-50 border border-slate-200 rounded-xl focus:outline-none focus:ring-2 focus:ring-orange-400 focus:bg-white transition-all">
          <button id="btnQuestion" class="px-4 py-2 bg-orange-500 hover:bg-orange-600 active:scale-95 text-white font-semibold text-sm rounded-xl transition-all shadow-sm shrink-0">
            送出
          </button>
        </div>
      </div>

      <!-- 房間設定開關 -->
      <div class="space-y-3 border-t border-slate-100 pt-3">
        <div class="flex items-center justify-between p-2.5 rounded-xl hover:bg-slate-50 transition-colors">
          <div>
            <div class="text-xs font-bold text-slate-700">🔒 鎖定房間</div>
            <div class="text-[11px] text-slate-400">開啟後將暫停接收學生新回應</div>
          </div>
          <label class="relative inline-flex items-center cursor-pointer">
            <input type="checkbox" id="lockToggle" class="sr-only peer">
            <div class="w-11 h-6 bg-slate-200 peer-focus:outline-none rounded-full peer peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-slate-300 after:border after:rounded-full after:h-5 after:w-5 after:transition-all peer-checked:bg-orange-500"></div>
          </label>
        </div>

        <div class="flex items-center justify-between p-2.5 rounded-xl hover:bg-slate-50 transition-colors">
          <div>
            <div class="text-xs font-bold text-slate-700">🔄 允許多次送出</div>
            <div class="text-[11px] text-slate-400">學生可重複提交多個詞彙</div>
          </div>
          <label class="relative inline-flex items-center cursor-pointer">
            <input type="checkbox" id="toggleSwitch" class="sr-only peer">
            <div class="w-11 h-6 bg-slate-200 peer-focus:outline-none rounded-full peer peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-slate-300 after:border after:rounded-full after:h-5 after:w-5 after:transition-all peer-checked:bg-orange-500"></div>
          </label>
        </div>
      </div>
    </div>

    <!-- 下半部：工具選單按鈕區 -->
    <div class="space-y-2 border-t border-slate-100 pt-3">
      <div class="text-xs font-bold text-slate-400 mb-2">工具選單</div>
      <div class="grid grid-cols-3 gap-2">
        <button id="btnFullScreen" class="px-3 py-2.5 bg-slate-100 hover:bg-slate-200 text-slate-700 text-xs font-semibold rounded-xl transition-all flex items-center justify-center gap-1">
          ⛶ 全螢幕
        </button>
        <button id="btnScreenshot" class="px-3 py-2.5 bg-slate-100 hover:bg-slate-200 text-slate-700 text-xs font-semibold rounded-xl transition-all flex items-center justify-center gap-1">
          📸 截圖
        </button>
        <button id="btnCSV" class="px-3 py-2.5 bg-slate-100 hover:bg-slate-200 text-slate-700 text-xs font-semibold rounded-xl transition-all flex items-center justify-center gap-1">
          📄 匯出 CSV
        </button>
      </div>
      <button id="btnReset" class="w-full py-2.5 bg-red-50 hover:bg-red-100 text-red-600 border border-red-200 font-semibold text-xs rounded-xl transition-all shadow-sm mt-2 flex items-center justify-center gap-1">
        🗑 清除重來
      </button>
    </div>

  </aside>

</div>

<!-- 詞彙選擇列表彈窗 -->
<div class="overlay" id="pickOverlay">
  <div class="bg-white p-6 rounded-2xl max-w-lg w-[90%] max-h-[75vh] flex flex-col shadow-2xl">
    <h3 class="text-lg font-bold text-slate-800 mb-3">選擇要檢視或放大的詞彙：</h3>
    <div id="pickList" class="flex-1 overflow-y-auto space-x-1 space-y-2 py-2"></div>
    <div class="mt-4 text-right border-t pt-3">
      <button id="pickClose" class="px-5 py-2 bg-slate-100 hover:bg-slate-200 text-slate-700 text-sm font-semibold rounded-xl transition-colors">
        取消
      </button>
    </div>
  </div>
</div>

<!-- 詞彙放大顯示彈窗 (加寬加高優化) -->
<div class="overlay" id="zoomOverlay">
  <div class="bg-white p-8 md:p-10 rounded-3xl max-w-2xl md:max-w-3xl lg:max-w-4xl w-[92%] text-center shadow-2xl transition-all">
    <div id="zoomText" class="text-3xl sm:text-4xl md:text-5xl lg:text-6xl font-extrabold text-slate-800 break-words leading-snug my-6 md:my-8 px-2 max-h-[60vh] overflow-y-auto"></div>
    <div class="flex gap-3 justify-center border-t border-slate-100 pt-6">
      <button id="zoomDelete" class="px-6 py-2.5 bg-red-500 hover:bg-red-600 text-white text-sm font-semibold rounded-xl transition-colors shadow-sm">
        🗑 刪除此詞彙
      </button>
      <button id="zoomClose" class="px-6 py-2.5 bg-slate-100 hover:bg-slate-200 text-slate-700 text-sm font-semibold rounded-xl transition-colors">
        關閉
      </button>
    </div>
  </div>
</div>

<!-- 清除數據確認彈窗 -->
<div class="overlay" id="resetConfirmOverlay">
  <div class="bg-white p-6 rounded-2xl max-w-sm w-[90%] text-center shadow-2xl">
    <div class="text-3xl mb-2">⚠️</div>
    <h3 class="text-lg font-bold text-slate-800 mb-2">重置所有資料？</h3>
    <p class="text-sm text-slate-500 mb-6">這將會清除當前畫面上所有的文字雲詞彙，此動作無法復原。</p>
    <div class="flex gap-3 justify-center">
      <button id="btnConfirmReset" class="flex-1 py-2.5 bg-red-500 hover:bg-red-600 text-white text-sm font-semibold rounded-xl transition-colors">
        確定清除
      </button>
      <button id="btnCancelReset" class="flex-1 py-2.5 bg-slate-100 hover:bg-slate-200 text-slate-700 text-sm font-semibold rounded-xl transition-colors">
        取消
      </button>
    </div>
  </div>
</div>

<!-- 複製成功 Toast 提示 -->
<div id="toast" class="fixed bottom-6 left-1/2 -translate-x-1/2 bg-slate-900/90 text-white px-5 py-2.5 rounded-2xl shadow-xl text-sm font-medium transition-all opacity-0 pointer-events-none z-[3000]">
  已複製學員端連結！
</div>

<script type="module">
import { initializeApp } from 'https://www.gstatic.com/firebasejs/10.12.2/firebase-app.js';
import { getFirestore, doc, setDoc, onSnapshot, updateDoc, deleteField } from 'https://www.gstatic.com/firebasejs/10.12.2/firebase-firestore.js';

// Firebase Configuration
const firebaseConfig = {
  apiKey: "AIzaSyAcIQYst9gFRyE2nCqCwNgCL3LG2VkBXbM",
  authDomain: "factor-529c9.firebaseapp.com",
  projectId: "factor-529c9",
  storageBucket: "factor-529c9.firebasestorage.app",
  messagingSenderId: "575829635896",
  appId: "1:575829635896:web:a65b6edd9d163375b087cd"
};

const app = initializeApp(firebaseConfig);
const db = getFirestore(app);

// Application State Variables
const roomCode = Math.floor(1000 + Math.random() * 9000).toString();
let allowMultiple = false;
let isLocked = false;
let wordData = {};
let isDrawing = false;
let drawQueue = false;
let selectedWord = null;

// UI Elements Reference
const canvas = document.getElementById('word-canvas');
const container = document.getElementById('cloud-container');
const roomRef = doc(db, 'rooms', roomCode);
const clientUrl = `${location.origin}${location.pathname.replace(/[^/]*$/, '')}guest.html?room=${roomCode}`;

async function initRoom() {
  try {
    await setDoc(roomRef, { roomCode, locked: false, allowMultiple: false, words: {}, question: '' }, { merge: true });
    document.getElementById('roomCodeDisplay').textContent = roomCode;

    // Listen for real-time Firestore updates
    onSnapshot(roomRef, (docSnap) => {
      if (!docSnap.exists()) return;
      const data = docSnap.data();

      if (data.allowMultiple !== allowMultiple) {
        allowMultiple = data.allowMultiple;
        document.getElementById('toggleSwitch').checked = !!allowMultiple;
      }
      if (data.locked !== isLocked) {
        isLocked = !!data.locked;
        document.getElementById('lockToggle').checked = isLocked;
      }

      document.getElementById('questionDisplay').textContent = data.question ? data.question : '等待教師發布題目...';
      document.getElementById('wordCount').textContent = Object.keys(data.words || {}).length;

      const newWords = data.words || {};
      if (JSON.stringify(newWords) !== JSON.stringify(wordData)) {
        wordData = newWords;
        queueDraw();
      }
    });
  } catch (err) {
    console.error("Firebase init error:", err);
  }
}

function queueDraw() { 
  if (isDrawing) { drawQueue = true; return; } 
  drawCloud(); 
}

function drawCloud() {
  canvas.width = container.clientWidth;
  canvas.height = container.clientHeight;
  const list = Object.entries(wordData).map(([w, c]) => [w, c]);

  const ctx = canvas.getContext('2d');
  ctx.clearRect(0, 0, canvas.width, canvas.height);

  if (list.length === 0) {
    ctx.font = '16px "Noto Sans TC"';
    ctx.fillStyle = '#94A3B8'; 
    ctx.textAlign = 'center';
    ctx.fillText('等待學生送出詞彙…', canvas.width / 2, canvas.height / 2);
    return;
  }

  isDrawing = true;

  // 智慧調適文字大小：詞彙少時大幅放大標題字級，隨詞彙增加自動縮小
  const wordCount = list.length;
  const minDim = Math.min(canvas.width, canvas.height);
  
  // 計算最高頻率詞彙
  const maxFreq = Math.max(...list.map(item => item[1]));

  WordCloud(canvas, {
    list,
    gridSize: Math.max(4, Math.floor(minDim / 100)),
    weightFactor: (w) => {
      // 依總詞數動態選擇基礎縮放比例
      let baseScale;
      if (wordCount <= 3) baseScale = minDim * 0.32;
      else if (wordCount <= 8) baseScale = minDim * 0.22;
      else if (wordCount <= 20) baseScale = minDim * 0.15;
      else baseScale = minDim * 0.09;

      const relativeWeight = Math.pow(w / maxFreq, 0.7);
      return Math.max(16, relativeWeight * baseScale);
    },
    fontFamily: 'Noto Sans TC, sans-serif',
    color: () => ['#F97316', '#3B82F6', '#10B981', '#8B5CF6', '#EF4444', '#F59E0B', '#06B6D4'][Math.floor(Math.random() * 7)],
    rotateRatio: 0.15,
    minSize: 12,
    weightMode: 'size',
    shape: 'circle',
    ellipticity: 0.75,
    backgroundColor: 'transparent'
  });
}

// 監聽 WordCloud 畫布繪製完成事件
canvas.addEventListener('wordcloudstop', function onStop() {
  isDrawing = false;
  if (drawQueue) { 
    drawQueue = false; 
    setTimeout(drawCloud, 300); 
  }
});

canvas.addEventListener('click', () => {
  if (Object.keys(wordData).length === 0) return;
  const listEl = document.getElementById('pickList');
  listEl.innerHTML = '';
  Object.keys(wordData).sort((a, b) => wordData[b] - wordData[a]).forEach(word => {
    const chip = document.createElement('span');
    chip.className = 'inline-block m-1.5 px-4 py-2 text-sm font-medium bg-amber-50 hover:bg-amber-100 border border-amber-200 text-amber-900 rounded-2xl cursor-pointer transition-colors shadow-sm';
    chip.textContent = `${word} (${wordData[word]})`;
    chip.addEventListener('click', () => { hidePick(); showZoom(word); });
    listEl.appendChild(chip);
  });
  document.getElementById('pickOverlay').classList.add('active');
});

function hidePick() { document.getElementById('pickOverlay').classList.remove('active'); }
document.getElementById('pickClose').addEventListener('click', hidePick);

function showZoom(word) {
  selectedWord = word;
  document.getElementById('zoomText').textContent = word;
  document.getElementById('zoomOverlay').classList.add('active');
}
function hideZoom() { 
  document.getElementById('zoomOverlay').classList.remove('active'); 
  selectedWord = null; 
}
document.getElementById('zoomClose').addEventListener('click', hideZoom);
document.getElementById('zoomOverlay').addEventListener('click', e => {
  if (e.target === document.getElementById('zoomOverlay')) hideZoom();
});

document.getElementById('zoomDelete').addEventListener('click', async () => {
  if (!selectedWord) return;
  await updateDoc(roomRef, { words: { [selectedWord]: deleteField() } });
  hideZoom();
});

document.getElementById('lockToggle').addEventListener('change', async () => {
  isLocked = document.getElementById('lockToggle').checked;
  await updateDoc(roomRef, { locked: isLocked });
});

document.getElementById('toggleSwitch').addEventListener('change', async () => {
  allowMultiple = document.getElementById('toggleSwitch').checked;
  await updateDoc(roomRef, { allowMultiple });
});

document.getElementById('btnQuestion').addEventListener('click', async () => {
  const text = document.getElementById('questionInput').value.trim();
  await updateDoc(roomRef, { question: text });
  document.getElementById('questionInput').value = '';
});

document.getElementById('btnFullScreen').addEventListener('click', () => {
  if (!document.fullscreenElement) document.documentElement.requestFullscreen();
  else document.exitFullscreen();
});

document.getElementById('btnScreenshot').addEventListener('click', () => {
  const tempCanvas = document.createElement('canvas');
  tempCanvas.width = canvas.width; 
  tempCanvas.height = canvas.height;
  const tCtx = tempCanvas.getContext('2d');
  tCtx.fillStyle = '#FFFFFF'; 
  tCtx.fillRect(0, 0, tempCanvas.width, tempCanvas.height);
  tCtx.drawImage(canvas, 0, 0);

  const dataUrl = tempCanvas.toDataURL("image/png");
  const a = document.createElement('a');
  a.href = dataUrl; 
  a.download = `即時互動文字雲_${roomCode}.png`; 
  a.click();
});

document.getElementById('btnCSV').addEventListener('click', () => {
  const rows = [['詞彙', '次數'], ...Object.entries(wordData)];
  const csv = rows.map(r => r.map(v => `"${String(v).replace(/"/g, '""')}"`).join(',')).join('\n');
  const blob = new Blob(['\uFEFF' + csv], { type: 'text/csv;charset=utf-8;' });
  const u = URL.createObjectURL(blob);
  const a = document.createElement('a'); 
  a.href = u; 
  a.download = `文字雲統計_${roomCode}.csv`; 
  a.click();
  URL.revokeObjectURL(u);
});

// 清除重來：彈出自訂 Modal
document.getElementById('btnReset').addEventListener('click', () => {
  document.getElementById('resetConfirmOverlay').classList.add('active');
});
document.getElementById('btnCancelReset').addEventListener('click', () => {
  document.getElementById('resetConfirmOverlay').classList.remove('active');
});
document.getElementById('btnConfirmReset').addEventListener('click', async () => {
  document.getElementById('resetConfirmOverlay').classList.remove('active');
  try { await updateDoc(roomRef, { words: {} }); }
  catch (e) { console.error("Reset failed:", e); }
});

// 複製連結與 Toast
function showToast(msg) {
  const toast = document.getElementById('toast');
  toast.textContent = msg;
  toast.style.opacity = '1';
  setTimeout(() => { toast.style.opacity = '0'; }, 2200);
}

document.getElementById('btnCopyLink').addEventListener('click', () => {
  const tempInput = document.createElement('input');
  tempInput.value = clientUrl;
  document.body.appendChild(tempInput);
  tempInput.select();
  document.execCommand('copy');
  document.body.removeChild(tempInput);
  showToast('已複製學員端連結！');
});

document.getElementById('btnOpenGuest').addEventListener('click', () => {
  window.open(clientUrl, '_blank', 'noopener');
});

window.addEventListener('load', () => {
  initRoom();

  // 產生乾淨專屬 QR Code
  try {
    new QRCode(document.getElementById('qrcode'), {
      text: clientUrl,
      width: 140,
      height: 140,
      colorDark: "#1E293B",
      colorLight: "#FFFFFF",
      correctLevel: QRCode.CorrectLevel.M
    });
  } catch (err) {
    console.error("QRCode Error:", err);
  }

  // 視窗尺寸改變時重繪畫布
  const resizeObserver = new ResizeObserver(() => {
    queueDraw();
  });
  resizeObserver.observe(container);

  // 淡出並隱藏載入遮罩
  const loading = document.getElementById('loading');
  loading.style.opacity = '0';
  setTimeout(() => loading.style.display = 'none', 300);
});
</script>

<script>
window.MathJax = {
  tex: { inlineMath: [['$','$'],['\\(','\\)']], displayMath: [['$$','$$'],['\\[','\\]']], processEscapes: true },
  options: { skipHtmlTags: ['script','noscript','style','textarea','pre'] }
};
</script>
<script async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js"></script>

</body>
</html>