import 'dart:async';

import 'package:logging/logging.dart';
import 'package:nc_photos/controller/files_controller.dart';
import 'package:nc_photos/controller/metadata_controller.dart';
import 'package:nc_photos/event/native_event.dart';
import 'package:nc_photos/platform/features.dart' as features;
import 'package:nc_photos/stream_extension.dart';
import 'package:np_codegen/np_codegen.dart';
import 'package:np_platform_image_processor/np_platform_image_processor.dart';
import 'package:np_platform_message_relay/np_platform_message_relay.dart';

part 'native_event_relay.g.dart';

/// Convert native events into actions on the corresponding controllers
@npLog
class NativeEventRelay {
  NativeEventRelay({
    required this.filesController,
    required this.metadataController,
  }) {
    _subscriptions.add(MessageRelay.stream.whereType<Message>().listen((event) {
      switch (event.event) {
        case FileExifUpdatedEvent.id:
          _onFileExifUpdatedEvent(FileExifUpdatedEvent.fromEvent(event));
          break;

        default:
          _log.severe('Unknown event: ${event.event}');
          break;
      }
    }));

    if (features.isSupportEnhancement) {
      _subscriptions.add(ImageProcessor.stream
          .whereType<ImageProcessorUploadSuccessEvent>()
          .listen(_onImageProcessorUploadSuccessEvent));
    }
  }

  void dispose() {
    for (final s in _subscriptions) {
      s.cancel();
    }
  }

  void _onFileExifUpdatedEvent(FileExifUpdatedEvent ev) {
    _log.info(ev);
    filesController.applySyncResult(fileExifs: ev.fileIds);
  }

  void _onImageProcessorUploadSuccessEvent(
      ImageProcessorUploadSuccessEvent ev) {
    _log.info(ev);
    filesController.syncRemote();
    metadataController.scheduleNext();
  }

  final FilesController filesController;
  final MetadataController metadataController;
  final _subscriptions = <StreamSubscription>[];
}