fix(mobile): eager cast discovery

mobile/lib/models/cast/cast_manager_state.dart

@@ -1,10 +1,23 @@
+import 'package:fcast_sender_sdk/fcast_sender_sdk.dart';
 import 'package:freezed_annotation/freezed_annotation.dart';
 
 part 'cast_manager_state.freezed.dart';
 
 enum CastDestinationType { googleCast, fCast }
 
-enum CastState { idle, playing, paused, buffering }
+enum CastState {
+  idle,
+  playing,
+  paused,
+  buffering;
+
+  static CastState fromPlaybackState(PlaybackState state) => switch (state) {
+    PlaybackState.playing => CastState.playing,
+    PlaybackState.paused => CastState.paused,
+    PlaybackState.buffering => CastState.buffering,
+    PlaybackState.idle || PlaybackState.ended => CastState.idle,
+  };
+}
 
 typedef CastDestination = (String name, CastDestinationType type, dynamic device);
 

mobile/lib/repositories/cast.repository.dart

@@ -13,11 +13,13 @@ class CastRepository {
 
   final Map<(String, ProtocolType), (DeviceInfo, int?)> _discoveredDevices = {};
   int _currentDeviceGeneration = 0;
-  Future<void>? _initialized;
+  late final Future<void> _initialized;
+
+  void init() {
+    _initialized = _initialize();
+  }
 
   Future<void> connect(DeviceInfo deviceInfo) async {
-    await _ensureInitialized();
-
     _activeDevice?.disconnect();
     final device = _castContext!.createDeviceFromInfo(info: deviceInfo);
     _activeDevice = device;
@@ -68,18 +70,11 @@ class CastRepository {
   void seekTo(Duration position) => _activeDevice?.seek(timeSeconds: position.inSeconds.toDouble());
 
   Future<List<(DeviceInfo, int?)>> listDestinations() async {
-    final isFirstScan = _initialized == null;
-    await _ensureInitialized();
-
-    if (isFirstScan) {
-      await Future.delayed(const Duration(seconds: 3));
-    }
+    await _initialized;
 
     return _discoveredDevices.values.toList(growable: false);
   }
 
-  Future<void> _ensureInitialized() => _initialized ??= _initialize();
-
   Future<void> _initialize() async {
     await FCastSenderSdkLib.init();
     _castContext = CastContext();
@@ -96,5 +91,6 @@ class CastRepository {
     });
 
     await discoverer.init();
+    await Future.delayed(const Duration(seconds: 3));
   }
 }

mobile/lib/services/cast.service.dart

@@ -41,6 +41,7 @@ class CastService {
   CastService(this._castRepository, this._sessionsApiService, this._assetApiRepository) {
     _castRepository.onConnectionState = _onConnectionState;
     _castRepository.onDeviceEvent = _onDeviceEvent;
+    _castRepository.init();
   }
 
   void _onConnectionState(DeviceConnectionState state) {
@@ -71,17 +72,7 @@ class CastService {
   }
 
   void _handlePlaybackState(PlaybackState state) {
-    switch (state) {
-      case PlaybackState.playing:
-        onCastState?.call(CastState.playing);
-      case PlaybackState.paused:
-        onCastState?.call(CastState.paused);
-      case PlaybackState.buffering:
-        onCastState?.call(CastState.buffering);
-      case PlaybackState.idle:
-      case PlaybackState.ended:
-        onCastState?.call(CastState.idle);
-    }
+    onCastState?.call(CastState.fromPlaybackState(state));
   }
 
   Future<void> connect(dynamic device) async {