Mudanças na aba de quiz

lib/features/quiz/presentation/pages/teacher_quiz_page.dart

@@ -67,6 +67,9 @@ class _TeacherQuizPageState extends State<TeacherQuizPage>
   bool _loadingHistory = true;
   String? _generatingForId;
 
+  // Disciplina seleccionada no histórico (null = vista de disciplinas)
+  String? _selectedHistoryDisciplineId;
+
   @override
   void initState() {
     super.initState();
@@ -256,7 +259,13 @@ class _TeacherQuizPageState extends State<TeacherQuizPage>
         elevation: 0,
         leading: IconButton(
           icon: const Icon(Icons.arrow_back),
-          onPressed: () => context.go('/teacher-dashboard'),
+          onPressed: () {
+            if (_selectedHistoryDisciplineId != null) {
+              setState(() => _selectedHistoryDisciplineId = null);
+            } else {
+              context.go('/teacher-dashboard');
+            }
+          },
         ),
         bottom: TabBar(
           controller: _tabController,
@@ -330,6 +339,82 @@ class _TeacherQuizPageState extends State<TeacherQuizPage>
     );
   }
 
+  Map<String, String> get _classNamesMap {
+    return {for (final c in _teacherClasses) c['id']!: c['name'] ?? c['id']!};
+  }
+
+  Map<String, List<Map<String, dynamic>>> _groupHistoryByDiscipline() {
+    final classNames = _classNamesMap;
+    final Map<String, List<Map<String, dynamic>>> groups = {};
+    for (final quiz in _history) {
+      final quizClassIds = (quiz['classIds'] as List?)?.cast<String>() ?? [];
+      String? groupId = quizClassIds.cast<String?>().firstWhere(
+        (cid) => cid != null && classNames.containsKey(cid),
+        orElse: () => null,
+      );
+      groupId ??= quizClassIds.isNotEmpty ? quizClassIds.first : '__geral__';
+      groups.putIfAbsent(groupId, () => []).add(quiz);
+    }
+    return groups;
+  }
+
+  Widget _buildHistoryQuizTile(Map<String, dynamic> item, ColorScheme cs) {
+    final name = (item['materialName'] as String? ?? 'Material')
+        .replaceAll('.pdf', '')
+        .replaceAll('_', ' ');
+    final ts = item['createdAt'];
+    String dateStr = '';
+    if (ts is Timestamp) {
+      final dt = ts.toDate();
+      dateStr =
+          '${dt.day.toString().padLeft(2, '0')}/${dt.month.toString().padLeft(2, '0')}/${dt.year}  ${dt.hour.toString().padLeft(2, '0')}:${dt.minute.toString().padLeft(2, '0')}';
+    }
+    return Container(
+      decoration: BoxDecoration(
+        color: cs.surface,
+        borderRadius: BorderRadius.circular(16),
+        border: Border.all(color: cs.outline.withValues(alpha: 0.15)),
+        boxShadow: [
+          BoxShadow(
+            color: cs.shadow.withValues(alpha: 0.05),
+            blurRadius: 8,
+            offset: const Offset(0, 2),
+          ),
+        ],
+      ),
+      child: ListTile(
+        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+        leading: Container(
+          width: 44,
+          height: 44,
+          decoration: BoxDecoration(
+            color: cs.primary.withValues(alpha: 0.1),
+            borderRadius: BorderRadius.circular(10),
+          ),
+          child: Icon(Icons.quiz, color: cs.primary, size: 22),
+        ),
+        title: Text(
+          name,
+          maxLines: 2,
+          overflow: TextOverflow.ellipsis,
+          style: TextStyle(
+            fontWeight: FontWeight.w600,
+            fontSize: 14,
+            color: cs.onSurface,
+          ),
+        ),
+        subtitle: dateStr.isNotEmpty
+            ? Text(
+                dateStr,
+                style: TextStyle(fontSize: 12, color: cs.onSurfaceVariant),
+              )
+            : null,
+        trailing: Icon(Icons.bar_chart, color: cs.onSurfaceVariant),
+        onTap: () => _showResultsPopup(item),
+      ),
+    );
+  }
+
   Widget _buildHistoryTab(ColorScheme cs) {
     if (_loadingHistory)
       return const Center(child: CircularProgressIndicator());
@@ -355,67 +440,131 @@ class _TeacherQuizPageState extends State<TeacherQuizPage>
         ),
       );
     }
+
+    final groups = _groupHistoryByDiscipline();
+    final classNames = _classNamesMap;
+
+    // Vista de quizzes de uma disciplina
+    if (_selectedHistoryDisciplineId != null) {
+      final quizzes = groups[_selectedHistoryDisciplineId] ?? [];
+      final disciplineName =
+          classNames[_selectedHistoryDisciplineId] ??
+          (_selectedHistoryDisciplineId == '__geral__'
+              ? 'Geral'
+              : _selectedHistoryDisciplineId!);
+      return Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Padding(
+            padding: const EdgeInsets.fromLTRB(8, 8, 16, 0),
+            child: Row(
+              children: [
+                IconButton(
+                  icon: Icon(Icons.arrow_back, color: cs.onSurface),
+                  onPressed: () =>
+                      setState(() => _selectedHistoryDisciplineId = null),
+                ),
+                const SizedBox(width: 4),
+                Expanded(
+                  child: Text(
+                    disciplineName,
+                    maxLines: 1,
+                    overflow: TextOverflow.ellipsis,
+                    style: TextStyle(
+                      fontSize: 16,
+                      fontWeight: FontWeight.bold,
+                      color: cs.onSurface,
+                    ),
+                  ),
+                ),
+                Text(
+                  '${quizzes.length} quiz${quizzes.length != 1 ? 'zes' : ''}',
+                  style: TextStyle(fontSize: 13, color: cs.onSurfaceVariant),
+                ),
+              ],
+            ),
+          ),
+          const Divider(height: 1),
+          Expanded(
+            child: ListView.separated(
+              padding: const EdgeInsets.all(16),
+              itemCount: quizzes.length,
+              separatorBuilder: (_, __) => const SizedBox(height: 12),
+              itemBuilder: (context, i) =>
+                  _buildHistoryQuizTile(quizzes[i], cs),
+            ),
+          ),
+        ],
+      );
+    }
+
+    // Vista de disciplinas
+    final disciplineIds = groups.keys.toList();
     return ListView.separated(
       padding: const EdgeInsets.all(16),
-      itemCount: _history.length,
+      itemCount: disciplineIds.length,
       separatorBuilder: (_, __) => const SizedBox(height: 12),
       itemBuilder: (context, i) {
-        final item = _history[i];
-        final name = (item['materialName'] as String? ?? 'Material')
-            .replaceAll('.pdf', '')
-            .replaceAll('_', ' ');
-        final ts = item['createdAt'];
-        String dateStr = '';
-        if (ts is Timestamp) {
-          final dt = ts.toDate();
-          dateStr =
-              '${dt.day.toString().padLeft(2, '0')}/${dt.month.toString().padLeft(2, '0')}/${dt.year}  ${dt.hour.toString().padLeft(2, '0')}:${dt.minute.toString().padLeft(2, '0')}';
-        }
-        return Container(
-          decoration: BoxDecoration(
-            color: cs.surface,
-            borderRadius: BorderRadius.circular(16),
-            border: Border.all(color: cs.outline.withValues(alpha: 0.15)),
-            boxShadow: [
-              BoxShadow(
-                color: cs.shadow.withValues(alpha: 0.05),
-                blurRadius: 8,
-                offset: const Offset(0, 2),
-              ),
-            ],
-          ),
-          child: ListTile(
-            contentPadding: const EdgeInsets.symmetric(
-              horizontal: 16,
-              vertical: 8,
+        final dId = disciplineIds[i];
+        final dName = classNames[dId] ?? (dId == '__geral__' ? 'Geral' : dId);
+        final count = groups[dId]!.length;
+        return InkWell(
+          borderRadius: BorderRadius.circular(16),
+          onTap: () => setState(() => _selectedHistoryDisciplineId = dId),
+          child: Container(
+            padding: const EdgeInsets.all(20),
+            decoration: BoxDecoration(
+              color: cs.surface,
+              borderRadius: BorderRadius.circular(16),
+              border: Border.all(color: cs.outline.withValues(alpha: 0.15)),
+              boxShadow: [
+                BoxShadow(
+                  color: cs.shadow.withValues(alpha: 0.05),
+                  blurRadius: 8,
+                  offset: const Offset(0, 2),
+                ),
+              ],
             ),
-            leading: Container(
-              width: 44,
-              height: 44,
-              decoration: BoxDecoration(
-                color: cs.primary.withValues(alpha: 0.1),
-                borderRadius: BorderRadius.circular(10),
-              ),
-              child: Icon(Icons.quiz, color: cs.primary, size: 22),
+            child: Row(
+              children: [
+                Container(
+                  width: 48,
+                  height: 48,
+                  decoration: BoxDecoration(
+                    color: cs.primary.withValues(alpha: 0.1),
+                    borderRadius: BorderRadius.circular(12),
+                  ),
+                  child: Icon(Icons.school, color: cs.primary, size: 26),
+                ),
+                const SizedBox(width: 16),
+                Expanded(
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Text(
+                        dName,
+                        maxLines: 2,
+                        overflow: TextOverflow.ellipsis,
+                        style: TextStyle(
+                          fontSize: 15,
+                          fontWeight: FontWeight.bold,
+                          color: cs.onSurface,
+                        ),
+                      ),
+                      const SizedBox(height: 4),
+                      Text(
+                        '$count quiz${count != 1 ? 'zes' : ''} criado${count != 1 ? 's' : ''}',
+                        style: TextStyle(
+                          fontSize: 13,
+                          color: cs.onSurfaceVariant,
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+                Icon(Icons.chevron_right, color: cs.onSurfaceVariant),
+              ],
             ),
-            title: Text(
-              name,
-              maxLines: 2,
-              overflow: TextOverflow.ellipsis,
-              style: TextStyle(
-                fontWeight: FontWeight.w600,
-                fontSize: 14,
-                color: cs.onSurface,
-              ),
-            ),
-            subtitle: dateStr.isNotEmpty
-                ? Text(
-                    dateStr,
-                    style: TextStyle(fontSize: 12, color: cs.onSurfaceVariant),
-                  )
-                : null,
-            trailing: Icon(Icons.bar_chart, color: cs.onSurfaceVariant),
-            onTap: () => _showResultsPopup(item),
           ),
         );
       },