mobile-app/lib/presentation/screens/plot_detail/sc_plot_action.dart

import 'package:farm_tpf/custom_model/CropPlot.dart';
import 'package:farm_tpf/data/repository/repository.dart';
import 'package:farm_tpf/presentation/custom_widgets/bottom_loader.dart';
import 'package:farm_tpf/presentation/custom_widgets/loading_list_page.dart';
import 'package:farm_tpf/presentation/screens/actions/crop_status/sc_edit_action_crop_status.dart';
import 'package:farm_tpf/presentation/screens/actions/disease/sc_edit_action_disease.dart';
import 'package:farm_tpf/presentation/screens/actions/dung/sc_edit_action_dung.dart';
import 'package:farm_tpf/presentation/screens/actions/end/sc_edit_action_end.dart';
import 'package:farm_tpf/presentation/screens/actions/environment_update/sc_edit_action_environment_update.dart';
import 'package:farm_tpf/presentation/screens/actions/harvest/sc_edit_action_harvest.dart';
import 'package:farm_tpf/presentation/screens/actions/nursery/sc_edit_action_nursery.dart';
import 'package:farm_tpf/presentation/screens/actions/other/sc_edit_action_other.dart';
import 'package:farm_tpf/presentation/screens/actions/plant/sc_edit_action_plant.dart';
import 'package:farm_tpf/presentation/screens/actions/spraying/sc_edit_action_spraying.dart';
import 'package:farm_tpf/presentation/screens/actions/use_water/sc_edit_action_user_water.dart';
import 'package:farm_tpf/presentation/screens/plot/sc_plot.dart';
import 'package:farm_tpf/presentation/screens/plot_detail/bloc/plot_detail_bloc.dart';
import 'package:farm_tpf/utils/const_color.dart';
import 'package:farm_tpf/utils/const_string.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:farm_tpf/utils/formatter.dart';
import 'package:get/get.dart';

class PlotActionScreen extends StatefulWidget {
  int cropId;
  String cropCode;
  PlotActionScreen({this.cropId, this.cropCode});
  @override
  _PlotActionScreenState createState() => _PlotActionScreenState();
}

class _PlotActionScreenState extends State<PlotActionScreen> {
  List<ActionType> actions = new List<ActionType>();
  ScrollController _scrollController;
  var changeToRefresh = Get.put(ChangeToRefreshLists());

  @override
  void initState() {
    super.initState();
    changeToRefresh.initValue();
    _scrollController = ScrollController()..addListener(() => setState(() {}));
    _initActionButtons();
  }

  _initActionButtons() {
    actions.add(ActionType(
        plot_action_nursery,
        null,
        EditActionNurseryScreen(
          cropId: widget.cropId,
        )));
    actions.add(ActionType(plot_action_plant, null, EditActionPlantScreen()));
    actions.add(ActionType(
        plot_action_crop_status, null, EditActionCropStatusScreen()));
    actions.add(ActionType(
        plot_action_environment_update, null, EditActionEnvironmentUpdate()));
    actions.add(ActionType(plot_action_dung, null, EditActionDungScreen()));
    actions.add(
        ActionType(plot_action_spraying, null, EditActionSprayingScreen()));
    actions
        .add(ActionType(plot_action_disease, null, EditActionDiseaseScreen()));
    actions.add(
        ActionType(plot_action_use_water, null, EditActionUseWaterScreen()));
    actions.add(ActionType(plot_action_other, null, EditActionOtherScreen()));
    actions
        .add(ActionType(plot_action_harvest, null, EditActionHarvestScreen()));
    actions.add(ActionType(plot_action_finish, null, EditActionEndScreen()));
  }

  Widget _createActionButtons(ActionType actionType, BuildContext _context) {
    return BlocProvider<PlotDetailBloc>(
      create: (context) => PlotDetailBloc(repository: Repository()),
      child: GestureDetector(
          onTap: () {
            Navigator.of(context)
                .push(MaterialPageRoute(
                    builder: (context) => actionType.listScreen))
                .then((value) {
              if (1 == 1) {
                try {
                  //TODO: refresh list
                } catch (e) {
                  print(e.toString());
                }
              }
            });
          },
          child: Container(
            height: 75,
            margin: EdgeInsets.all(4.0),
            padding: EdgeInsets.all(0.0),
            decoration: BoxDecoration(
              color: COLOR_CONST.WHITE,
              borderRadius: BorderRadius.only(
                  topLeft: Radius.circular(8.0),
                  bottomLeft: Radius.circular(8.0),
                  bottomRight: Radius.circular(8.0),
                  topRight: Radius.circular(8.0)),
              boxShadow: <BoxShadow>[
                BoxShadow(
                    color: COLOR_CONST.GRAY1.withOpacity(0.2),
                    offset: Offset(1.1, 1.1),
                    blurRadius: 10.0),
              ],
            ),
            child: Stack(
              children: <Widget>[
                Positioned(
                    top: -10,
                    right: -3,
                    child: (actionType.addScreen == null)
                        ? Container()
                        : IconButton(
                            icon: Icon(
                              Icons.add_circle,
                              size: 40,
                              color: Colors.green,
                            ),
                            onPressed: () {
                              Navigator.of(context).push(MaterialPageRoute(
                                  builder: (context) => actionType.addScreen));
                            })),
                Positioned.fill(
                  child: Align(
                      alignment: Alignment.center,
                      child: Text(
                        actionType.actionName,
                        textAlign: TextAlign.center,
                        style: TextStyle(
                          fontWeight: FontWeight.w400,
                          fontSize: 13,
                          color: COLOR_CONST.BLACK2,
                        ),
                      )),
                ),
              ],
            ),
          )),
    );
  }

  bool _showTitle(BuildContext context) {
    var kExpandedHeight = MediaQuery.of(context).size.width * 1.125 + 32;
    return _scrollController.hasClients &&
        _scrollController.offset > kExpandedHeight - kToolbarHeight;
  }

  @override
  Widget build(BuildContext context) {
    return NestedScrollView(
      controller: _scrollController,
      headerSliverBuilder: (context, innerBoxScrolled) => [
        SliverAppBar(
          floating: false,
          pinned: false,
          backgroundColor: Colors.white,
          leading: Container(),
          title: null,
          // title: _showTitle(context) ? Text(plot_detail_title) : null,
          //Height flexibleSpace : WidthScreen /2 * 6/16 * 6(row) + 8(space) *4
          expandedHeight: MediaQuery.of(context).size.width * 1.125 + 32,
          flexibleSpace: _showTitle(context)
              ? null
              : BlocProvider<PlotDetailBloc>(
                  create: (context) => PlotDetailBloc(repository: Repository()),
                  child: BlocBuilder<PlotDetailBloc, PlotDetailState>(
                      builder: (contextB, state) {
                    return FlexibleSpaceBar(
                      centerTitle: true,
                      title: GridView.count(
                          shrinkWrap: true,
                          crossAxisCount: 2,
                          childAspectRatio: 16 / 6,
                          children: actions.map(
                            (item) {
                              return _createActionButtons(item, contextB);
                            },
                          ).toList()),
                    );
                  }),
                ),
        ),
      ],
      body: BlocProvider(
        create: (context) => PlotDetailBloc(repository: Repository())
          ..add(DataFetched(cropId: widget.cropId, cropCode: widget.cropCode)),
        child: HoldInfinityWidget(
          cropId: widget.cropId,
          cropCode: widget.cropCode,
        ),
      ),
    );
  }
}

class HoldInfinityWidget extends StatelessWidget {
  int cropId;
  String cropCode;
  HoldInfinityWidget({this.cropId, this.cropCode});
  final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
  @override
  Widget build(BuildContext context) {
    return Scaffold(key: _scaffoldKey, body: InfinityView(cropId: cropId));
  }
}

class InfinityView extends StatefulWidget {
  int cropId;
  String cropCode;
  InfinityView({this.cropId, this.cropCode});
  @override
  _InfinityViewState createState() => _InfinityViewState();
}

class _InfinityViewState extends State<InfinityView> {
  final _scrollController = ScrollController();
  final _scrollThreshold = 250.0;
  PlotDetailBloc _plotDetailBloc;
  var a = Get.put(ChangeToRefreshLists());

  @override
  void initState() {
    _scrollController.addListener(() {
      final maxScroll = _scrollController.position.maxScrollExtent;
      final currentScroll = _scrollController.position.pixels;
      if (maxScroll - currentScroll < _scrollThreshold) {
        _plotDetailBloc
            .add(DataFetched(cropId: widget.cropId, cropCode: widget.cropCode));
      }
    });
    _plotDetailBloc = BlocProvider.of<PlotDetailBloc>(context);
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return BlocBuilder<PlotDetailBloc, PlotDetailState>(
      builder: (context, state) {
        if (state is PlotDetailFailure) {
          return Center(child: Text(state.errorString));
        }
        if (state is PlotDetailSuccess) {
          if (state.items.isEmpty) {
            return Center(child: Text(label_list_empty));
          }
          List<Activities> currentItems = List<Activities>.from(state.items);
          Get.find<ChangeToRefreshLists>()
              .updateValue(currentItems, state.page, state.hasReachedMax);
          return RefreshIndicator(
              child: Column(
                children: [
                  Container(
                      height: 40,
                      alignment: Alignment.center,
                      decoration: BoxDecoration(
                        color: COLOR_CONST.WHITE_50,
                        border: Border(
                            top: BorderSide(
                                width: 0.5, color: COLOR_CONST.DEFAULT),
                            bottom: BorderSide(
                                width: 0.5, color: COLOR_CONST.DEFAULT)),
                      ),
                      child: Text(
                        plot_detail_title,
                        style: TextStyle(
                            fontSize: 20, fontWeight: FontWeight.normal),
                      )),
                  Expanded(
                      child: ListView.builder(
                    physics: AlwaysScrollableScrollPhysics(),
                    itemBuilder: (BuildContext context, int index) {
                      return index >= state.items.length
                          ? BottomLoader()
                          : ItemInfinityWidget(
                              currentItems: currentItems,
                              item: state.items[index],
                              currentPage: state.page,
                              currentReachedMax: state.hasReachedMax);
                    },
                    itemCount: state.hasReachedMax
                        ? state.items.length
                        : state.items.length + 1,
                    controller: _scrollController,
                  ))
                ],
              ),
              onRefresh: () async {
                _plotDetailBloc.add(OnRefresh(
                    cropId: widget.cropId, cropCode: widget.cropCode));
              });
        }
        return Center(
          child: LoadingListPage(),
        );
      },
    );
  }

  @override
  void dispose() {
    _scrollController.dispose();
    super.dispose();
  }
}

class ItemInfinityWidget extends StatelessWidget {
  final List<Activities> currentItems;
  final Activities item;
  final int currentPage;
  final bool currentReachedMax;

  const ItemInfinityWidget(
      {Key key,
      @required this.currentItems,
      @required this.item,
      @required this.currentPage,
      @required this.currentReachedMax})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
        child: Card(
          child: ListTile(
            title: Text(item.activityTypeDescription ?? ''),
            subtitle: Text(item.executeDate.format_DDMMYY_HHmm()),
            trailing: Text(item.id.toString()),
          ),
        ),
        onTap: () {
          if (item.activityTypeName == "ACTIVE_TYPE_NURSERY") {
            Get.to(EditActionNurseryScreen(
              cropId: item.cropId,
              activityId: item.id,
              isEdit: true,
            )).then((value) {
              if (value != null) {
                try {
                  //TODO: refresh when edit activity
                  // BlocProvider.of<PlotDetailBloc>(context)
                  //     .add(OnRefresh(cropId: item.cropId));
                  // var updatedItem = Activities.fromJson(value);

                  // List<Activities> updatedItems = new List<Activities>();
                  // currentItems.forEach((e) {
                  //   if (e.id == updatedItem.id) {
                  //     e.executeDate = updatedItem.executeDate;
                  //   } else {
                  //     //
                  //   }
                  //   updatedItems.add(Activities.clone(e));
                  // });

                  // BlocProvider.of<PlotDetailBloc>(context).add(
                  //     OnUpdate<Activities>(
                  //         currentItems: updatedItems,
                  //         currentPage: currentPage,
                  //         hasReachedMax: currentReachedMax));
                } catch (e) {
                  print(e.toString());
                }
              }
            });
          }
        });
  }
}

class ActionType {
  Widget addScreen;
  Widget listScreen;
  String actionName;
  ActionType(String actionName, Widget addScreen, Widget listScreen) {
    this.actionName = actionName;
    this.addScreen = addScreen;
    this.listScreen = listScreen;
  }
}

class ChangeToRefreshLists extends GetxController {
  List<Activities> currentItems;
  int currentPage;
  bool currentReachedMax;

  void initValue() {
    currentItems = List<Activities>();
    currentPage = 0;
    currentReachedMax = true;
    update();
  }

  void updateValue(List<Activities> updateItems, int page, bool reachedMax) {
    currentItems = updateItems;
    currentPage = page;
    currentReachedMax = reachedMax;
    update();
  }
}