import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'social_feed_models.dart';
import 'social_feed_service.dart';

/// Provider for SocialFeedService singleton.
final socialFeedServiceProvider = Provider<SocialFeedService>((ref) {
  FirebaseFirestore? firestore;
  try {
    firestore = FirebaseFirestore.instance;
  } catch (_) {
    firestore = null;
  }
  final service = SocialFeedService(firestore: firestore);
  ref.onDispose(() {
    service.dispose();
  });
  return service;
});

/// State provider for the active feed filter tab.
final feedFilterStateProvider = StateProvider<FeedFilter>((ref) {
  return FeedFilter.allActivity;
});

/// Stream provider for the filtered community social feed.
final socialFeedStreamProvider =
    StreamProvider.autoDispose<List<SocialFeedItem>>((ref) {
  final service = ref.watch(socialFeedServiceProvider);
  final filter = ref.watch(feedFilterStateProvider);
  return service.getFeedStream(filter: filter);
});