import 'package:flutter/widgets.dart';
import 'package:flutter_app_update/flutter_app_update.dart';
import 'package:flutter_app_update/result_model.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';

final updateProgressProvider = StateProvider<double?>((_) => null);
final updateUrlProvider = StateProvider<String?>((_) => null);
final updateDialogVisibleProvider = StateProvider<bool>((_) => false);

bool _listenerRegistered = false;

/// The native download callback can outlive the update dialog, so it uses the
/// app's provider container instead of retaining a dialog WidgetRef.
void ensureUpdateProgressListener(BuildContext context) {
  if (_listenerRegistered) return;
  _listenerRegistered = true;
  final container = ProviderScope.containerOf(context, listen: false);
  AzhonAppUpdate.listener((result) => applyUpdateProgress(container, result));
}

@visibleForTesting
void applyUpdateProgress(ProviderContainer container, ResultModel result) {
  switch (result.type) {
    case ResultType.downloading:
      if (result.progress == null || result.max == null || result.max == 0) {
        container.read(updateProgressProvider.notifier).state = null;
        break;
      }
      container.read(updateProgressProvider.notifier).state =
          result.progress!.toDouble() / result.max!.toDouble();
      break;
    case ResultType.done:
      container.read(updateProgressProvider.notifier).state = 1;
      container.read(updateUrlProvider.notifier).state = result.apk;
      break;
    case ResultType.error:
    case ResultType.cancel:
      container.read(updateProgressProvider.notifier).state = null;
      break;
    default:
      break;
  }
}