rog_app/lib/widgets/list_widget.dart

import 'package:flutter/material.dart';
import 'package:geojson_vi/geojson_vi.dart';
import 'package:get/get.dart';
import 'package:rogapp/model/destination.dart';
import 'package:rogapp/pages/destination/destination_controller.dart';
import 'package:rogapp/pages/index/index_controller.dart';
import 'package:rogapp/services/maxtrix_service.dart';
import 'package:rogapp/utils/const.dart';
//import 'package:rogapp/widgets/bottom_sheets/bottom_sheet_start.dart';
//import 'package:rogapp/widgets/bottom_sheets/bottom_sheet_goal.dart';
//import 'package:rogapp/widgets/bottom_sheets/bottom_sheet_normal_point.dart';
import 'package:rogapp/widgets/bottom_sheet_new.dart';

class ListWidget extends StatefulWidget {
  const ListWidget({Key? key}) : super(key: key);

  @override
  State<ListWidget> createState() => _ListWidgetState();
}

// IndexControllerから目的地のリストを取得し、ListView.builderを使用してリストを表示します。
// 各リストアイテムは、目的地の画像、名前、カテゴリ、サブロケーションID、現在地からの距離を表示します。
// リストアイテムがタップされると、changeCurrentFeatureメソッドを呼び出して現在の目的地を更新し、 BottomSheetウィジェットを表示します。
// 主なロジック：
// IndexControllerから目的地のリストを取得し、ListView.builderを使用してリストを構築します。
// getImageメソッドを使用して、目的地の画像を取得し表示します。画像が存在しない場合は、デフォルトの画像を表示します。
// matrixDistanceメソッドを使用して、現在地から目的地までの距離を計算し表示します。
// リストアイテムがタップされると、changeCurrentFeatureメソッドを呼び出して現在の目的地を更新し、showModalBottomSheetを使用してBottomSheetウィジェットを表示します。
//
class _ListWidgetState extends State<ListWidget> {
  final IndexController indexController = Get.find<IndexController>();

  final DestinationController destinationController =
      Get.find<DestinationController>();

  Image getImage(int index) {
    if (indexController.locations[0].features[index]!.properties!["photos"] ==
            null ||
        indexController.locations[0].features[index]!.properties!["photos"] ==
            "") {
      return const Image(image: AssetImage('assets/images/empty_image.png'));
    } else {
      //print("==== photo index is $index ===");
      String serverUrl = ConstValues.currentServer();
      GeoJSONFeature gf = indexController.locations[0].features[index]!;
      String photo = gf.properties!["photos"];
      return Image(
        image: NetworkImage('$serverUrl/media/compressed/$photo'),
        errorBuilder:
            (BuildContext context, Object exception, StackTrace? stackTrace) {
          return Image.asset("assets/images/empty_image.png");
        },
      );
    }
  }

  // 未使用？
  void changeCurrentFeature(GeoJSONFeature fs) {
    if (indexController.currentFeature.isNotEmpty) {
      indexController.currentFeature.clear();
    }
    indexController.currentFeature.add(fs);
  }

  @override
  void initState() {
    super.initState();
  }

  Destination createDestination(GeoJSONFeature feature) {
    final props = feature.properties;
    GeoJSONMultiPoint pt = feature.geometry as GeoJSONMultiPoint;

    return Destination(
      cp: props!['cp'],
      lat: pt.coordinates[0][1],
      lon: pt.coordinates[0][0],
    );
  }

  Future<String> matrixDistance(int i) async {
    // Create two destinations directly from indexController.locations[0].collection
    Destination desCurr = Destination(
        lat: indexController.currentLat, lon: indexController.currentLon);
    //Destination dest1 = createDestination(indexController.locations[0].collection[0]);
    Destination dest2 =
        createDestination(indexController.locations[0].features[i]!);

    // Get the distance between these two destinations
    final res = await MatrixService.getDestinations([desCurr, dest2]);

    return res["routes"][0]["legs"][0]["distance"]["text"];
    //print("matrix result is ${i} : ${res["routes"][0]["legs"][0]["distance"]["text"]} ");
  }

  Future<void> _pullRefresh() async {
    //print("pull to refesh");
    indexController.locations[0].features.sort((a, b) =>
        (a!.properties!['cp'] as Comparable)
            .compareTo(b!.properties!['cp'] as Comparable));
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    debugPrint("_ListWidgetState");
    return Obx(
      () => indexController.locations.isNotEmpty
          ? RefreshIndicator(
              onRefresh: _pullRefresh,
              child: ListView.builder(
                itemCount: indexController.locations[0].features.length,
                shrinkWrap: true,
                itemBuilder: (_, index) {
                  bool isFound = false;
                  for (Destination d in destinationController.destinations) {
                    if (indexController.locations[0].features[index]!
                            .properties!['location_id'] ==
                        d.location_id) {
                      isFound = true;
                      break;
                    }
                  }
                  return Card(
                    child: ListTile(
                        selected: isFound,
                        selectedTileColor: Colors.yellow.shade200,
                        onTap: () {
                          GeoJSONFeature gf =
                              indexController.locations[0].features[index]!;
                          Destination des =
                              destinationController.festuretoDestination(gf);
                          changeCurrentFeature(gf);

                          Widget bottomSheet = BottomSheetNew(destination: des);
                          /*
                          if (des.cp == -1 || des.cp == 0) {
                            bottomSheet = BottomSheetStart(destination: des);
                          } else if (des.cp == -2 || des.cp == 0) {
                            bottomSheet = BottomSheetGoal(destination: des);
                          } else {
                            bottomSheet = BottomSheetNormalPoint(destination: des);
                          }
                           */

                          showModalBottomSheet(
                              constraints: BoxConstraints.loose(
                                  Size(Get.width, Get.height * 0.85)),
                              isScrollControlled: true,
                              context: context,
                              builder: ((context) => bottomSheet ),
                              );
                        },
                        leading: getImage(index),
                        title: indexController.locations[0].features[index]!
                                    .properties!['location_name'] !=
                                null
                            ? Text(indexController.locations[0].features[index]!
                                .properties!['location_name']
                                .toString())
                            : const Text(""),
                        subtitle: indexController.locations[0].features[index]!
                                    .properties!['category'] !=
                                null
                            ? Text(indexController.locations[0].features[index]!
                                .properties!['category'])
                            : const Text(""),
                        trailing: Column(
                          crossAxisAlignment: CrossAxisAlignment.end,
                          children: [
                            indexController.locations[0].features[index]!
                                        .properties!['sub_loc_id'] !=
                                    null
                                ? Text(indexController.locations[0]
                                    .features[index]!.properties!['sub_loc_id'])
                                : const Text(""),
                            SizedBox(
                              width: 100,
                              child: FutureBuilder<String>(
                                future: matrixDistance(index),
                                builder: (context, snapshot) {
                                  if (snapshot.connectionState ==
                                      ConnectionState.waiting) {
                                    return const Center(
                                      child: CircularProgressIndicator(),
                                    );
                                  }
                                  if (snapshot.hasError) {
                                    return const Text("-");
                                  } else {
                                    return Text(
                                      snapshot.data ?? '',
                                      style: const TextStyle(
                                          color: Colors.red,
                                          fontWeight: FontWeight.bold),
                                    );
                                  }
                                },
                              ),
                            )
                          ],
                        )),
                  );
                },
              ),
            )
          : const SizedBox(
              width: 0,
              height: 0,
            ),
    );
  }
}