import 'dart:async';

import 'package:lensai/features/bangs/data/models/bang_data.dart';
import 'package:lensai/features/bangs/data/providers.dart';
import 'package:lensai/features/bangs/domain/providers/bangs.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';

part 'search.g.dart';

@Riverpod()
class BangSearch extends _$BangSearch {
  late StreamController<List<BangData>> _streamController;

  Future<void> search(String input) async {
    if (input.isNotEmpty) {
      await ref
          .read(bangDatabaseProvider)
          .bangDao
          .queryBangs(input)
          .get()
          .then(_streamController.add);
    }
  }

  @override
  Stream<List<BangData>> build() {
    _streamController = StreamController();

    ref.onDispose(() async {
      await _streamController.close();
    });

    return _streamController.stream;
  }
}

@Riverpod()
class SeamlessBangProvider extends _$SeamlessBangProvider {
  bool _hasSearch = false;

  void search(String input) {
    if (input.isNotEmpty) {
      if (!_hasSearch) {
        _hasSearch = true;
        ref.invalidateSelf();
      }

      unawaited(ref.read(bangSearchProvider.notifier).search(input));
    } else if (_hasSearch) {
      _hasSearch = false;
      ref.invalidateSelf();
    }
  }

  @override
  AsyncValue<List<BangData>> build() {
    return _hasSearch
        ? ref.watch(bangSearchProvider)
        : ref.watch(frequentBangDataListProvider);
  }
}