import 'package:bloc/bloc.dart';
import 'package:dartz/dartz.dart';
import 'package:freezed_annotation/freezed_annotation.dart';
import 'package:injectable/injectable.dart';

import '../../../domain/wallet/wallet.dart';

part 'wallet_loader_event.dart';
part 'wallet_loader_state.dart';
part 'wallet_loader_bloc.freezed.dart';

@injectable
class WalletLoaderBloc extends Bloc<WalletLoaderEvent, WalletLoaderState> {
  final IWalletRepository _repository;

  WalletLoaderBloc(this._repository) : super(WalletLoaderState.initial()) {
    on<WalletLoaderEvent>(_onWalletLoaderEvent);
  }

  Future<void> _onWalletLoaderEvent(
    WalletLoaderEvent event,
    Emitter<WalletLoaderState> emit,
  ) {
    return event.map(
      fetched: (e) async {
        emit(state.copyWith(isFetching: true, failureOption: none()));

        final result = await _repository.getWallet();

        final data = result.fold(
          (f) => state.copyWith(failureOption: optionOf(f)),
          (summary) => state.copyWith(summary: summary, hasLoaded: true),
        );

        emit(data.copyWith(isFetching: false));
      },
      coinBalanceUpdated: (e) async {
        emit(
          state.copyWith(
            summary: state.summary.copyWith(coinBalance: e.coinBalance),
          ),
        );
      },
      cleared: (e) async => emit(WalletLoaderState.initial()),
    );
  }
}