hade_hoda_flutter/lib/features/level/presentation/bloc/level_bloc.dart

import 'dart:async';
import 'package:bloc/bloc.dart';
import 'package:flutter/cupertino.dart';
import 'package:go_router/go_router.dart';
import 'package:hadi_hoda_flutter/core/constants/my_constants.dart';
import 'package:hadi_hoda_flutter/core/params/level_params.dart';
import 'package:hadi_hoda_flutter/core/routers/my_routes.dart';
import 'package:hadi_hoda_flutter/core/status/base_status.dart';
import 'package:hadi_hoda_flutter/core/utils/local_storage.dart';
import 'package:hadi_hoda_flutter/features/level/domain/entity/level_entity.dart';
import 'package:hadi_hoda_flutter/features/level/domain/entity/level_location.dart';
import 'package:hadi_hoda_flutter/features/level/domain/usecases/get_levels_usecase.dart';
import 'package:hadi_hoda_flutter/features/level/presentation/bloc/level_event.dart';
import 'package:hadi_hoda_flutter/features/level/presentation/bloc/level_state.dart';
import 'package:hadi_hoda_flutter/features/level/presentation/ui/widgets/level_widget.dart';

class LevelBloc extends Bloc<LevelEvent, LevelState> {
  /// ------------constructor------------
  LevelBloc(
      this._getLeveslUseCase,
      ) : super(const LevelState()) {
    on<GetLevelListEvent>(_getLevelListEvent);
    on<SetCurrentLevelEvent>(_setCurrentLevelEvent);
    on<StartScrollEvent>(_startScrollEvent);
  }

  @override
  Future<void> close() {
    scrollController.dispose();
    return super.close();
  }

  /// ------------UseCases------------
  final GetLevelsUseCase _getLeveslUseCase;

  /// ------------Variables------------
  final List<LevelLocation> bottomLocationList = [
    LevelLocation(bottom: -30, left: 30, index: 1),
    LevelLocation(bottom: 50, left: 100, index: 2),
    LevelLocation(bottom: 150, left: 60, index: 3),
    LevelLocation(bottom: 210, left: 120, index: 4),
    LevelLocation(bottom: 250, right: 60, index: 5),
    LevelLocation(top: 150, right: 40, index: 6),
    LevelLocation(top: 70, right: 70, index: 7),
    LevelLocation(top: -20, right: 70, index: 8),
  ];

  final List<LevelLocation> topLocationList = [
    LevelLocation(bottom: 30, right: 80, index: 9),
    LevelLocation(bottom: 70, left: 20, index: 10),
    LevelLocation(bottom: 150, left: 50, index: 11),
    LevelLocation(bottom: 180, left: 140, index: 12),
    LevelLocation(bottom: 260, right: 20, index: 13),
    LevelLocation(bottom: 370, right: 30, index: 14),
    LevelLocation(bottom: 420, left: 40, index: 15),
    LevelLocation(top: 410, left: 0, index: 16),
    LevelLocation(top: 320, left: 60, index: 17),
    LevelLocation(top: 220, left: 80, index: 18),
    LevelLocation(top: 130, left: 20, index: 19),
    LevelLocation(top: 50, left: 70, index: 20),
  ];

  final List<LevelEntity> bottom8LevelList = [];
  final List<LevelEntity> top12LevelList = [];


  /// ------------Controllers------------
  final ScrollController scrollController = ScrollController();

  /// ------------Functions------------
  void goToQuestionPage(BuildContext context, LevelEntity level){
    context.pushNamed(
      Routes.questionPage,
      pathParameters: {
        'id': '${level.id}',
      },
    );
  }

  void goToHomePage(BuildContext context){
    context.pop();
  }

  LevelType getLevelType(int index) {
    final int currentLevel = int.parse(
      LocalStorage.readData(key: MyConstants.currentLevel),
    );

    if (index < currentLevel) {
      return LevelType.finished;
    } else if (index == currentLevel) {
      return LevelType.current;
    } else {
      return LevelType.unFinished;
    }
  }

  /// ------------Api Calls------------
  FutureOr<void> _getLevelListEvent(GetLevelListEvent event,
      Emitter<LevelState> emit) async {
    final int currentLevel = int.parse(
      LocalStorage.readData(key: MyConstants.currentLevel),
    );
    await _getLeveslUseCase(LevelParams()).then((value) {
      value.fold(
        (data) async {
         bottom8LevelList.addAll(data.take(8));
         if(data.length > 8){
           top12LevelList.addAll(data.sublist(8, data.length));
         }
         emit(state.copyWith(
           getLevelStatus: const BaseComplete(''),
           chooseLevel: data.singleWhere((e) => e.order == currentLevel),
         ));
         add(StartScrollEvent());
        },
        (error) {},
      );
    });
  }

  FutureOr<void> _startScrollEvent(
    StartScrollEvent event,
    Emitter<LevelState> emit,
  ) async {
    final int currentLevel = int.parse(
      LocalStorage.readData(key: MyConstants.currentLevel),
    );

    await Future.delayed(const Duration(seconds: 1));
    if (scrollController.hasClients) {
     if(currentLevel < 9){
       scrollController.animateTo(
         scrollController.position.maxScrollExtent,
         duration: const Duration(milliseconds: 500), // Note: 500 seconds is very long.
         curve: Curves.easeInOut,
       );
     } else if( currentLevel > 8 && currentLevel < 14){
       scrollController.animateTo(
         scrollController.position.maxScrollExtent / 2,
         duration: const Duration(milliseconds: 500), // Note: 500 seconds is very long.
         curve: Curves.easeInOut,
       );
     }
    }
  }

  FutureOr<void> _setCurrentLevelEvent(SetCurrentLevelEvent event,
      Emitter<LevelState> emit) async {
    final String currentLevel = LocalStorage.readData(
        key: MyConstants.currentLevel);
    if (currentLevel.isEmpty) {
      await LocalStorage.saveData(key: MyConstants.currentLevel, value: '1');
    }
    add(GetLevelListEvent());
  }
}