import 'dart:async';
import 'package:aitrainer_app/bloc/menu/menu_bloc.dart';
import 'package:aitrainer_app/model/exercise_type.dart';
import 'package:aitrainer_app/repository/exercise_repository.dart';
import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';
import 'package:flutter_form_bloc/flutter_form_bloc.dart';
import 'package:meta/meta.dart';

part 'exercise_new_event.dart';

part 'exercise_new_state.dart';

class ExerciseNewBloc extends Bloc<ExerciseNewEvent, ExerciseNewState> {
  final ExerciseRepository exerciseRepository;
  final MenuBloc menuBloc;
  double quantity = 12;
  double unitQuantity = 30;

  @override
  ExerciseNewBloc({this.exerciseRepository, this.menuBloc, ExerciseType exerciseType}) : super(ExerciseNewInitial()) {
    exerciseRepository.setUnit(exerciseType.unit);
  }

  @override
  Stream<ExerciseNewState> mapEventToState(ExerciseNewEvent event) async* {
    try {
      if (event is ExerciseNewLoad) {
        yield ExerciseNewLoading();
        yield ExerciseNewReady();
      } else if ( event is ExerciseNewQuantityChange ) {
        yield ExerciseNewLoading();
        exerciseRepository.setQuantity(event.quantity);
        quantity = event.quantity;
        yield ExerciseNewReady();
      } else if ( event is ExerciseNewQuantityUnitChange ) {
        yield ExerciseNewLoading();
        exerciseRepository.setUnitQuantity(event.quantity);
        unitQuantity = event.quantity;
        yield ExerciseNewReady();
      } else if ( event is ExerciseNewSubmit ) {
        yield ExerciseNewLoading();
        await exerciseRepository.addExercise();
        menuBloc.add(MenuTreeDown(parent: 0));
        yield ExerciseNewReady();
      }
    } on Exception catch (e) {
      yield ExerciseNewError(message: e.toString());
    }
  }
}