refactor: improve player lifecycle

data/playback/src/commonMain/kotlin/bzh/ajaury/chombev/player/data/PlaybackRepositoryImpl.kt

@@ -82,15 +82,23 @@ internal class PlaybackRepositoryImpl(
 
     @OptIn(ExperimentalCoroutinesApi::class)
     private val currentPosition: Flow<Duration> = playbackState.flatMapLatest { state ->
-        if (state in listOf(PlaybackState.PLAYING, PlaybackState.PAUSED)) {
-            flow {
-                while (true) {
-                    emit(audioPlayer.currentPosition)
-                    delay(POSITION_POLL_INTERVAL)
+        when (state) {
+            in listOf(PlaybackState.PLAYING, PlaybackState.PAUSED) -> {
+                flow {
+                    while (true) {
+                        emit(audioPlayer.currentPosition)
+                        delay(POSITION_POLL_INTERVAL)
+                    }
                 }
             }
-        } else {
-            flowOf(audioPlayer.currentPosition)
+
+            PlaybackState.IDLE -> {
+                flowOf(Duration.ZERO)
+            }
+
+            else -> {
+                flowOf(audioPlayer.currentPosition)
+            }
         }
     }
 
@@ -304,7 +312,9 @@ internal class PlaybackRepositoryImpl(
         )
 
     override suspend fun stop() {
-        cancelRunningBreakJob()
+        breakJob?.cancel()
+        isBreaking.value = false
+        subtitle.value = Subtitle(emptyList())
         audioPlayer.stop()
     }
 
@@ -312,6 +322,7 @@ internal class PlaybackRepositoryImpl(
         breakJob?.cancel()
         isBreaking.value = false
         audioPlayer.release()
+        subtitle.value = Subtitle(emptyList())
     }
 
     private suspend fun cancelRunningBreakJob() {