feat: add replay functionality and improve error handling in audio player widget

lib/features/learning/modules/material/widgets/audio_player_widget.dart

@@ -27,7 +27,6 @@ class AudioPlayerWidgetState extends State<AudioPlayerWidget>
   Duration _position = Duration.zero;
   bool _isAudioLoaded = false;
   String? _errorMessage;
-  double _volume = 1.0;
   bool _isDisposed = false;
 
   @override
@@ -88,6 +87,18 @@ class AudioPlayerWidgetState extends State<AudioPlayerWidget>
         setState(() => _position = newPosition);
       }
     });
+
+    // Add completion listener
+    _audioPlayer.onPlayerComplete.listen((_) {
+      if (!_isDisposed) {
+        setState(() {
+          _position = Duration.zero;
+          _playerState = PlayerState.stopped;
+        });
+        // Reset source when playback completes
+        _audioPlayer.setSource(UrlSource(_getFullAudioUrl()));
+      }
+    });
   }
 
   String _getFullAudioUrl() {
@@ -96,6 +107,20 @@ class AudioPlayerWidgetState extends State<AudioPlayerWidget>
         : '${widget.baseUrl ?? ''}${widget.audioFileName}';
   }
 
+  Future<void> _replayAudio() async {
+    try {
+      await _audioPlayer.seek(Duration.zero);
+      await _audioPlayer.setSource(UrlSource(_getFullAudioUrl()));
+      await _audioPlayer.resume();
+    } catch (error) {
+      if (!_isDisposed) {
+        setState(() {
+          _errorMessage = "Failed to replay audio: $error";
+        });
+      }
+    }
+  }
+
   Widget _buildErrorWidget() {
     return Container(
       padding: const EdgeInsets.all(16),
@@ -174,7 +199,7 @@ class AudioPlayerWidgetState extends State<AudioPlayerWidget>
                   ),
                 ),
                 const SizedBox(width: 12),
-                _buildVolumeButton(),
+                _buildReplayButton(),
               ],
             ),
             if (_errorMessage != null)
@@ -204,17 +229,36 @@ class AudioPlayerWidgetState extends State<AudioPlayerWidget>
         size: 32,
       ),
       onPressed: _isAudioLoaded
-          ? () {
+          ? () async {
+              try {
                 if (_playerState == PlayerState.playing) {
-                _audioPlayer.pause();
+                  await _audioPlayer.pause();
                 } else {
-                _audioPlayer.resume();
+                  await _audioPlayer.resume();
+                }
+              } catch (error) {
+                if (!_isDisposed) {
+                  setState(() {
+                    _errorMessage = "Failed to control playback: $error";
+                  });
+                }
               }
             }
           : null,
     );
   }
 
+  Widget _buildReplayButton() {
+    return IconButton(
+      icon: const Icon(
+        Icons.replay,
+        color: Colors.blue,
+        size: 24,
+      ),
+      onPressed: _isAudioLoaded ? _replayAudio : null,
+    );
+  }
+
   Widget _buildTimelineIndicator() {
     return Row(
       mainAxisAlignment: MainAxisAlignment.spaceBetween,
@@ -243,9 +287,17 @@ class AudioPlayerWidgetState extends State<AudioPlayerWidget>
         min: 0.0,
         max: _duration.inSeconds.toDouble(),
         onChanged: _isAudioLoaded
-            ? (value) {
+            ? (value) async {
+                try {
                   final position = Duration(seconds: value.toInt());
-                _audioPlayer.seek(position);
+                  await _audioPlayer.seek(position);
+                } catch (error) {
+                  if (!_isDisposed) {
+                    setState(() {
+                      _errorMessage = "Failed to seek: $error";
+                    });
+                  }
+                }
               }
             : null,
         activeColor: Colors.blue,
@@ -254,27 +306,6 @@ class AudioPlayerWidgetState extends State<AudioPlayerWidget>
     );
   }
 
-  Widget _buildVolumeButton() {
-    return IconButton(
-      icon: Icon(
-        _volume == 0.0 ? Icons.volume_off : Icons.volume_up,
-        color: _volume == 0.0 ? Colors.grey : Colors.blue,
-        size: 24,
-      ),
-      onPressed: _isAudioLoaded
-          ? () {
-              if (_volume == 0.0) {
-                _audioPlayer.setVolume(1.0);
-                setState(() => _volume = 1.0);
-              } else {
-                _audioPlayer.setVolume(0.0);
-                setState(() => _volume = 0.0);
-              }
-            }
-          : null,
-    );
-  }
-
   @override
   Widget build(BuildContext context) {
     if (_errorMessage != null) {