Clean/lib/module/photo_preview/photo_preview_controller.dart

import 'dart:async';

import 'package:clean/base/base_controller.dart';
import 'package:clean/base/base_photo_controller.dart';
import 'package:clean/data/bean/photos_type.dart';
import 'package:clean/data/consts/constants.dart';
import 'package:clean/dialog/photo_delete_finish_dialog.dart';
import 'package:clean/dialog/photo_deleting_dialog.dart';
import 'package:clean/dialog/photo_preview_tip_dialog.dart';
import 'package:clean/module/image_picker/image_picker_util.dart';
import 'package:clean/module/locations_photo/locations_single_photo_controller.dart';
import 'package:clean/module/people_photo/people_photo_controller.dart';
import 'package:clean/module/people_photo/photo_group.dart';
import 'package:clean/module/photo_preview/phtoto_selected_preview_view.dart';
import 'package:clean/module/screenshots_blurry/screenshots_controller.dart';
import 'package:clean/module/similar_photo/similar_photo_controller.dart';
import 'package:clean/utils/file_utils.dart';
import 'package:clean/utils/toast_util.dart';
import 'package:flutter/Material.dart';
import 'package:flutter_card_swiper/flutter_card_swiper.dart';
import 'package:get/get.dart';
import 'package:wechat_assets_picker/wechat_assets_picker.dart';

class PhotoPreviewController extends BaseController {
  Rx<CardSwiperController> cardSwiperController = CardSwiperController().obs;
  final RxList<AssetEntity> listAssetEntity = <AssetEntity>[].obs;
  final RxSet<String> selectedPhotosIds = <String>{}.obs;

  final RxBool isSwiperEnd = false.obs;
  RxInt groupIndex = 0.obs;

  late PhotosType photosType;
  late String? currentImageId;
  RxDouble selectedFilesSize = 0.0.obs;
  RxInt selectedFileCount = 0.obs;

  @override
  void onInit() {
    super.onInit();

    print('PhotoPreviewController onInit');
    _getArgs(); // 获取传递的参数
    _initData(); // 初始化数据

    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (currentImageId != null) {
        for (int i = 0; i < listAssetEntity.length; i++) {
          if (listAssetEntity[i].id == currentImageId) {
            print('photoGroups[i].id ${listAssetEntity[i].id},i $i');
            groupIndex.value = i;
            cardSwiperController.value.moveTo(i);
            break;
          }
        }
      }
    });
  }

  @override
  void onReady() {
    // TODO: implement onReady
    super.onReady();
    print('PhotoPreviewController onReady');
    if (isFirstOpenPhotoPreview()) {
      photoPreviewTipDialog(clickCallback: () {
        setFirstOpenPhotoPreview(false);
      });
    }

  }

  // 获取参数
  void _getArgs() {
    photosType = parameters?['photosType'];
    currentImageId = parameters?['currentImageId'];
  }

  void _initData() {
    listAssetEntity.clear();
    selectedPhotosIds.clear();

    switch (photosType) {
      case PhotosType.peoplePhotos:
        final PeoplePhotoController controller =
            Get.find<PeoplePhotoController>();
        listAssetEntity.assignAll(controller.getAllPhotos());
        selectedPhotosIds.assignAll(controller.selectedPhotosIds);
        selectedFileCount.value = selectedPhotosIds.length;
        break;
      case PhotosType.screenshots:
        final ScreenShotsController controller =
            Get.find<ScreenShotsController>();
        listAssetEntity.assignAll(controller.getAllPhotos());
        selectedPhotosIds.assignAll(controller.selectedPhotosIds);
        selectedFileCount.value = selectedPhotosIds.length;
        break;
      case PhotosType.similarPhotos:
        final SimilarPhotoController controller =
            Get.find<SimilarPhotoController>();
        listAssetEntity.assignAll(controller.getAllPhotos());
        selectedPhotosIds.assignAll(controller.selectedPhotosIds);
        selectedFileCount.value = selectedPhotosIds.length;
        break;
      case PhotosType.locationPhotos:
        final LocationsSinglePhotoController controller =
            Get.find<LocationsSinglePhotoController>();
        listAssetEntity.assignAll(controller.getAllPhotos());
        selectedPhotosIds.assignAll(controller.selectedPhotosIds);
        selectedFileCount.value = selectedPhotosIds.length;
        break;
      case PhotosType.blurryPhotos:
        final ScreenShotsController controller =
            Get.find<ScreenShotsController>();
        listAssetEntity.assignAll(controller.getAllPhotos());
        selectedPhotosIds.assignAll(controller.selectedPhotosIds);
        selectedFileCount.value = selectedPhotosIds.length;
        break;
    }

    updateSelectedFilesSize();
  }

  //删除成功清除选中的图片
  void cleanSelections() async {
    listAssetEntity
        .removeWhere((element) => selectedPhotosIds.contains(element.id));
    selectedPhotosIds.clear();
    if (listAssetEntity.isEmpty) {
      return;
    }

    isSwiperEnd.value = false;

    if (listAssetEntity.isNotEmpty) {
      WidgetsBinding.instance.addPostFrameCallback((_) {
        groupIndex.value = 0;
        cardSwiperController.value.moveTo(0);
      });
    }
    updateSelectedFilesSize();
    selectedFileCount.value = selectedPhotosIds.length;
  }

  // 恢复状态
  void restoreSelections() {
    if (listAssetEntity.isEmpty) {
      clickBack();
      return;
    }

    isSwiperEnd.value = false;

    if (listAssetEntity.isNotEmpty) {
      WidgetsBinding.instance.addPostFrameCallback((_) {
        groupIndex.value = 0;
        cardSwiperController.value.moveTo(0);
      });
    }
    updateSelectedFilesSize();
    selectedFileCount.value = selectedPhotosIds.length;
  }

  Future<void> updateSelectedFilesSize() async {
    double totalSize = 0;
    // 通过selectedPhotosIds获取选中的图片，然后计算大小
    for (var id in selectedPhotosIds) {
      final entity = await AssetEntity.fromId(id);
      if (entity != null) {
        final file = await entity.file;
        if (file != null) {
          totalSize += await file.length();
        }
      }
    }

    selectedFilesSize.value = totalSize / 1024; // Convert to KB
  }

  void updateSelections(Set<String> selectedIds) {
    print('PhotoPreviewController updateSelections photosType $photosType selectedIds $selectedIds');
    selectedPhotosIds.assignAll(selectedIds);

    restoreSelections();
  }

  void recoverSelectPhoto() {
    cardSwiperController.value.undo();
  }

  void clickSelect() {
    cardSwiperController.value.swipe(CardSwiperDirection.left);
  }

  @override
  void onClose() {
    print('PhotoPreviewController onClose');
    super.onClose();
    isSwiperEnd.value = false;

    // 清理操作，释放资源
    cardSwiperController.value.dispose();
  }

  void clickBack() {
    _saveSelectedPhotos(photosType);
    Get.back();
  }


  // // 保存选择的图片ID列表
  void _saveSelectedPhotos(PhotosType type) {
    switch (type) {
      case PhotosType.peoplePhotos:
        PeoplePhotoController controller = Get.find<PeoplePhotoController>();
        controller.updateSelections(selectedPhotosIds);
        controller.restoreSelections();
        break;
      case PhotosType.screenshots:
        ScreenShotsController controller = Get.find<ScreenShotsController>();
        controller.updateSelections(selectedPhotosIds);
        controller.restoreSelections();
        break;
      case PhotosType.similarPhotos:
        SimilarPhotoController controller = Get.find<SimilarPhotoController>();
        controller.updateSelections(selectedPhotosIds);
        controller.restoreSelections();
        break;
      case PhotosType.locationPhotos:
        LocationsSinglePhotoController controller =
            Get.find<LocationsSinglePhotoController>();
        controller.updateSelections(selectedPhotosIds);
        controller.restoreSelections();
        break;
      case PhotosType.blurryPhotos:
        ScreenShotsController controller = Get.find<ScreenShotsController>();
        controller.updateSelections(selectedPhotosIds);
        controller.restoreSelections();
        break;
    }
  }

  void clickUnselect() {
    print("clickUnselect");
    cardSwiperController.value.swipe(CardSwiperDirection.right);
  }

  FutureOr<bool> onSwipe(
    int previousIndex,
    int? currentIndex,
    CardSwiperDirection direction,
  ) {
    print(
      'The card $previousIndex was swiped to the ${direction.name}. Now the card $currentIndex is on top',
    );
    if (currentIndex != null) {
      groupIndex.value = currentIndex;
    }
    // 如果direction是left，
    if (direction == CardSwiperDirection.left) {
      //   先看看图片id是不是在selectedPhotosIds里面，如果在，不处理，如果不在，添加到selectedPhotosIds里面
      if (!selectedPhotosIds.contains(listAssetEntity[previousIndex].id)) {
        print(
            'add photoGroups[groupIndex.value].id ${listAssetEntity[previousIndex].id}');
        selectedPhotosIds.add(listAssetEntity[previousIndex].id);
      }
    } else if (direction == CardSwiperDirection.right) {
      //   先看看图片id是不是在selectedPhotosIds里面，如果在，在selectedPhotosIds移除，不处理，如果不在，不处理
      if (selectedPhotosIds.contains(listAssetEntity[previousIndex].id)) {
        print(
            'remove photoGroups[groupIndex.value].id ${listAssetEntity[previousIndex].id}');
        selectedPhotosIds.remove(listAssetEntity[previousIndex].id);
      }
    }
    selectedFileCount.value = selectedPhotosIds.length;
    updateSelectedFilesSize();
    return true;
  }

  bool onSwiperUndo(
    int? previousIndex,
    int currentIndex,
    CardSwiperDirection direction,
  ) {
    print(
        'The card $currentIndex was swiped back to the ${direction.name}. Now the card $previousIndex is on top');

    groupIndex.value = currentIndex;
    //   撤销之前左滑的操作
    if (direction == CardSwiperDirection.left) {
      print(
          'photoGroups[groupIndex.value].id ${listAssetEntity[groupIndex.value].id}');
      if (selectedPhotosIds.contains(listAssetEntity[groupIndex.value].id)) {
        selectedPhotosIds.remove(listAssetEntity[groupIndex.value].id);
      }
    }
    selectedFileCount.value = selectedPhotosIds.length;
    updateSelectedFilesSize();
    return true;
  }

  onSwiperEnd() {
    isSwiperEnd.value = true;
    print('onSwiperEnd');

    PhotoSelectedPreviewPage.start(photosType, selectedPhotosIds);
  }

  clickDelete() async {
    print('clickDelete');

    switch (photosType) {
      case PhotosType.peoplePhotos:
        ImagePickerUtil.selectedPeoplePhotosIds.assignAll(selectedPhotosIds);
        break;
      case PhotosType.screenshots:
        ImagePickerUtil.selectedScreenshotPhotosIds
            .assignAll(selectedPhotosIds);
        break;
      case PhotosType.similarPhotos:
        ImagePickerUtil.selectedSimilarPhotosIds.assignAll(selectedPhotosIds);
        break;
      case PhotosType.locationPhotos:
        ImagePickerUtil.selectedLocationPhotosIds.assignAll(selectedPhotosIds);
        break;
      case PhotosType.blurryPhotos:
        ImagePickerUtil.selectedBlurryPhotosIds.assignAll(selectedPhotosIds);
        break;
    }
    if (selectedPhotosIds.isNotEmpty) {
      // 获取要删除的资产
      final assetsToDelete = listAssetEntity
          .where(
            (asset) => selectedPhotosIds.contains(asset.id),
          )
          .toList();

      // 调用方法会返回被删除的资源，如果全部失败会返回空列表。
      final List<String> result = await PhotoManager.editor.deleteWithIds(
        assetsToDelete.map((e) => e.id).toList(),
      );
      print('PhotoPreviewController result $result');

      //   比较result和selectedPhotosIds，如果result和selectedPhotosIds相等，说明删除成功，走下面的逻辑
      // 如果不相等，说明有删除失败的，走else逻辑
      if (result.length == selectedPhotosIds.length) {
        switch (photosType) {
          case PhotosType.peoplePhotos:
            ImagePickerUtil.updatePhotoGroupDate(
                photosType, ImagePickerUtil.selectedPeoplePhotosIds);

            break;
          case PhotosType.screenshots:
            ImagePickerUtil.updatePhotoGroupDate(
                photosType, ImagePickerUtil.selectedScreenshotPhotosIds);

            break;
          case PhotosType.similarPhotos:
            ImagePickerUtil.updatePhotoGroupDate(
                photosType, ImagePickerUtil.selectedSimilarPhotosIds);

            break;
          case PhotosType.locationPhotos:
            ImagePickerUtil.updatePhotoGroupDate(
                photosType, ImagePickerUtil.selectedLocationPhotosIds);

            break;
          case PhotosType.blurryPhotos:
            ImagePickerUtil.updatePhotoGroupDate(
                photosType, ImagePickerUtil.selectedBlurryPhotosIds);

            break;
        }

        cleanSelections();
      } else {
        // 删除失败
        ToastUtil.show("Delete failed");
      }
    }
  }

  // 将selectedFilesSize转成String类型,然后单位转换,如果超过1MB,则转成MB,超过1GB,则转成GB,否则KB
  String get selectedFilesSizeString {
    if (selectedFilesSize.value > 1024) {
      return "${(selectedFilesSize.value  / 1024).toStringAsFixed(2)}MB";
    } else if (selectedFilesSize.value > 1024 *  1024) {
      return "${(selectedFilesSize.value / 1024 /  1024).toStringAsFixed(2)}GB";
    } else {
      return "${(selectedFilesSize.value).toStringAsFixed(2)}KB";
    }
  }
}