/*
 * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import Curves from '@ohos.curves';
import { MenuOperation, WindowUtil } from '@ohos/common';
import {
  Action,
  AddMenuOperation,
  BatchDeleteMenuOperation,
  BroadCast,
  BroadCastConstants,
  BroadCastManager,
  Constants,
  DateUtil,
  DeleteMenuOperation,
  Log,
  MediaItem,
  MediaOperationType,
  MenuContext,
  MenuOperationFactory,
  ScreenManager,
  ShareMenuOperation,
  TimelineData,
  TimelineSelectManager,
  TraceControllerUtils,
  UiUtil,
  ViewData,
  ViewType
} from '@ohos/common';
import {
  BrowserController,
  CustomDialogView,
  ImageGridItemComponent,
  NoPhotoIndexComponent,
} from '@ohos/common/CommonComponents';
import { TimelineDataSource } from '../model/TimelineDataSource';
import { TimelineTitleComponent } from './TimelineTitleComponent';
import { TimelinePageActionBar } from './TimelinePageActionBar';
import { TimelinePageToolBar } from './TimelinePageToolBar';
import router from '@ohos.router';
import { TimelineDataSourceManager } from '../model/TimelineDataSourceManager';
import { TimelineScrollBar } from './TimelineScrollBar';

const TAG: string = 'TimelinePage';
AppStorage.SetOrCreate('TimelinePageIndex', Constants.INVALID);

interface Params {
  albumName: string;
  albumUri: string;
  pageType: string;
  pageFrom: number;
};

// PHOTO Page
@Component
export struct TimelinePage {
  @Provide isEmpty: boolean = false;
  @State isShowScrollBar: boolean = false;
  @StorageLink('isHorizontal') isHorizontal: boolean = ScreenManager.getInstance().isHorizontal();
  @State gridRowCount: number = 0;
  @Consume @Watch('updateRightClickMenuList') isSelectedMode: boolean;
  @Consume('isShowSideBar') @Watch('initGridRowCount') isSidebar: boolean;
  @Provide isAllSelected: boolean = false;
  @State totalSelectedCount: number = 0;
  @Provide broadCast: BroadCast = TimelineDataSourceManager.getInstance().getBroadCast();
  @Consume @Watch('onIndexPageShow') isShow: boolean;
  @StorageLink('TimelinePageIndex') @Watch('onIndexChange') TimelinePageIndex: number = Constants.INVALID;
  @StorageLink('isSplitMode') isSplitMode: boolean = ScreenManager.getInstance().isSplitMode();
  @StorageLink('leftBlank') leftBlank: number[]
    = [0, ScreenManager.getInstance().getStatusBarHeight(), 0, ScreenManager.getInstance().getNaviBarHeight()];
  dataSource: TimelineDataSource | null = null;
  mSelectManager: TimelineSelectManager = new TimelineSelectManager();
  scroller: Scroller = new Scroller();
  appBroadCast: BroadCast = BroadCastManager.getInstance().getBroadCast();
  isInCurrentTab = true; // Is it on the current tab page
  isDataFreeze = false; // Is the page data frozen
  deleteMode = false; // Is delete mode
  isActive = false; // Is the page active
  routerStart = false; // Is move or copy router page
  @Provide moreMenuList: Action[] = new Array<Action>();
  @Provide rightClickMenuList: Array<Action> = new Array<Action>();
  @State groupSelectMode: boolean[] = [];
  @Provide yearData: TimelineData[] = [];
  @Provide dateText: string = '';
  @Provide isShowBar: boolean = true;
  @StorageLink('placeholderIndex') @Watch('onPlaceholderChanged') placeholderIndex: number = -1;
  @ObjectLink browserController: BrowserController;
  @Provide hidePopup: boolean = false;
  // 选择模式下，鼠标对着未勾选项按右键弹框时，移动和复制菜单点击事件的标识位
  private isMvOrCpSeparatesItem: boolean = false;
  private mvOrCpSeparatesItem?: MediaItem;
  private onWindowSizeChangeCallBack: Function = (): void => this.initGridRowCount();
  private backPressEventFunc: Function = (callback: Function): void => this.onIndexBackPress(callback);
  private onTableChangedFunc: Function = (index: number): void => this.onTabChanged(index);
  private resetStateEventFunc: Function = (index: number): void => this.onStateReset(index);
  private updateDataSourceFunc: Function = (item: MediaItem): void => this.onUpdateFavorState(item);
  private resetZeroFunc: Function = (pageNumber: number): void => this.resetZero(pageNumber);
  private onLoadingFinishedFunc: Function = (size: number): void => this.onLoadingFinished(size);
  private selectFunc: Function = (index: number, id: string, isSelected: boolean, callback?: Function): void => this.select(index, id, isSelected, callback);
  private groupSelectFunc: Function = (position: number): void => this.groupSelect(position);
  private jumpPhotoBrowserFunc: Function = (name: string, item: MediaItem, geometryTapIndex: number, geometryTransitionString: string): void =>
  this.jumpPhotoBrowser(name, item, geometryTapIndex, geometryTransitionString);
  private jumpThirdPhotoBrowserFunc: Function = (name: string, item: MediaItem, geometryTapIndex: number, geometryTransitionString: string): void =>
  this.jumpThirdPhotoBrowser(name, item, geometryTapIndex, geometryTransitionString);
  private onDataReloadedFunc: Function = (): void => this.onDataReloaded();
  private initDateTextFunc: Function = (): void => this.initDateText();
  @State layoutOptions: GridLayoutOptions = {
    regularSize: [1, 1],
    irregularIndexes: [],
  }

  onPlaceholderChanged() {
    Log.debug(TAG, 'onPlaceholderChanged placeholderIndex is ' + this.placeholderIndex);
    if (this.placeholderIndex != -1) {
      this.scroller.scrollToIndex(this.placeholderIndex);
    }
  }

  aboutToAppear(): void {
    TraceControllerUtils.startTrace('TimelinePageAboutToAppear');
    Log.info(TAG, 'aboutToAppear begin');
    let self = this;
    this.dataSource = TimelineDataSourceManager.getInstance().getDataSource();
    let params: Params = router.getParams() as Params;
    if (params != null && params.pageFrom && params.pageFrom == Constants.ENTRY_FROM.CAMERA) {
      this.dataSource.initData();
    }
    this.mSelectManager.setGroupData(this.dataSource.getGroupData());
    this.mSelectManager.setTotalCount(this.dataSource.getMediaCount());
    this.moreMenuList = [Action.ADD, Action.INFO];
    this.updateRightClickMenuList();
    this.dataSource.registerCallback('updateGroupData', (newState: TimelineData[]) => {
      self.mSelectManager.updateGroupData(newState);
      self.updateYearMap();
      self.updateLayoutOptions(newState);
    });
    this.dataSource.registerCallback('updateCount', (newState: number) => {
      Log.info(TAG, `updateCount ${newState}`);
      self.isEmpty = !Boolean(newState);
      self.isShowScrollBar = (newState > Constants.PHOTOS_CNT_FOR_HIDE_SCROLL_BAR);
      self.mSelectManager.setTotalCount(newState);
    });

    // 后续phone缩略图支持横竖屏后再放开
    if (AppStorage.Get('deviceType') as string !== Constants.DEFAULT_DEVICE_TYPE) {
      ScreenManager.getInstance().on(ScreenManager.ON_WIN_SIZE_CHANGED, this.onWindowSizeChangeCallBack);
    }

    this.appBroadCast.on(BroadCastConstants.BACK_PRESS_EVENT, this.backPressEventFunc);
    this.appBroadCast.on(BroadCastConstants.ON_TAB_CHANGED, this.onTableChangedFunc);
    this.appBroadCast.on(BroadCastConstants.RESET_STATE_EVENT, this.resetStateEventFunc);
    this.appBroadCast.on(BroadCastConstants.UPDATE_DATA_SOURCE, this.updateDataSourceFunc);
    this.appBroadCast.on(BroadCastConstants.RESET_ZERO, this.resetZeroFunc);
    this.broadCast.on(Constants.ON_LOADING_FINISHED, this.onLoadingFinishedFunc);

    Log.info(TAG, 'aboutToAppear doing');
    this.mSelectManager.setPhotoDataImpl();

    this.broadCast.on(BroadCastConstants.SELECT, this.selectFunc);
    this.broadCast.on(BroadCastConstants.GROUP_SELECT, this.groupSelectFunc);
    this.broadCast.on(BroadCastConstants.JUMP_PHOTO_BROWSER, this.jumpPhotoBrowserFunc);
    this.broadCast.on(BroadCastConstants.JUMP_THIRD_PHOTO_BROWSER, this.jumpThirdPhotoBrowserFunc);
    this.broadCast.on(BroadCastConstants.ON_DATA_RELOADED, this.onDataReloadedFunc);
    this.broadCast.on(BroadCastConstants.INIT_DATE_TEXT, this.initDateTextFunc);

    this.mSelectManager.registerCallback('allSelect', (newState: boolean) => {
      Log.info(TAG, `allSelect ${newState}`);
      if (this.isDataFreeze) {
        return;
      }
      this.isAllSelected = newState;
      if (this.dataSource != null) this.dataSource.forceUpdate();
    });

    this.mSelectManager.registerCallback('updateGroupCount', () => {
      Log.info(TAG, 'updateGroupCount');
      if (this.isDataFreeze) {
        return;
      }
      this.updateGroupSelectMode();
    });

    this.mSelectManager.registerCallback('updateCount', (newState: number) => {
      Log.info(TAG, `mSelectManager updateCount ${newState}`);
      if (this.isDataFreeze) {
        return;
      }
      this.totalSelectedCount = newState;
      this.moreMenuList = Boolean(newState) ? [Action.ADD, Action.INFO]
        : [Action.ADD_INVALID, Action.INFO_INVALID];
    });
    this.initGridRowCount();
    this.updateGroupSelectMode();
    this.updateYearMap();
    this.onActive();
    this.updateLayoutOptions(this.dataSource.groups);
    TraceControllerUtils.finishTrace('TimelinePageAboutToAppear');
  }

  updateLayoutOptions(groups: TimelineData[]): void {
    this.layoutOptions.irregularIndexes && this.layoutOptions.irregularIndexes.pop();
    let currentTitleIndex = 0;
    let count: number[] = [];
    count.push(currentTitleIndex);
    for (let index = 0; index < groups.length - 1; index++) {
      currentTitleIndex = currentTitleIndex + groups[index].count + 1;
      count.push(currentTitleIndex);
    }
    this.layoutOptions = {
      regularSize: [1, 1],
      irregularIndexes: count,
    };
  }

  private onLoadingFinished(size: number): void {
    Log.info(TAG, `ON_LOADING_FINISHED size: ${size}`);
  }

  private select(index: number, id: string, isSelected: boolean, callback?: Function): void {
    if (this.mSelectManager.toggle(id, isSelected, index)) {
      if (!this.isSelectedMode) {
        this.isSelectedMode = true;
      }
    }
    if (callback) {
      callback();
    }
  }

  private groupSelect(position: number): void {
    Log.info(TAG, `GROUP_SELECT ${position}`);
    if (this.mSelectManager.toggleGroup(this.mSelectManager.getTitleCoordinate(position))) {
      this.totalSelectedCount = this.mSelectManager.getSelectedCount();
    }
  }

  private jumpPhotoBrowser(name: string, item: MediaItem, geometryTapIndex: number, geometryTransitionString: string): void {
    let targetIndex = this.dataSource == null ? Constants.NOT_FOUND : this.dataSource.getDataIndex(item);
    if (targetIndex == Constants.NOT_FOUND) {
      Log.error(TAG, 'targetIndex is not found');
      return;
    }
    AppStorage.SetOrCreate(Constants.APP_KEY_PHOTO_BROWSER, this.dataSource);
    if (geometryTapIndex !== undefined && geometryTransitionString !== undefined) {
      this.jumpToPhotoBrowserGeometryTransition(targetIndex, name, item, geometryTapIndex, geometryTransitionString);
    } else {
      this.jumpToPhotoBrowserNormal(targetIndex, name, item);
    }
  }

  private jumpThirdPhotoBrowser(name: string, item: MediaItem, geometryTapIndex: number, geometryTransitionString: string): void {
    let targetIndex = this.dataSource == null ? Constants.NOT_FOUND : this.dataSource.getDataIndex(item);
    if (targetIndex == Constants.NOT_FOUND) {
      Log.error(TAG, 'targetIndex is not found');
      return;
    }
    Log.info(TAG, `JUMP_THIRD_PHOTO_BROWSER.index: ${targetIndex} transition: ${name}`);
    AppStorage.SetOrCreate(Constants.PHOTO_GRID_SELECT_MANAGER, this.mSelectManager);
    AppStorage.SetOrCreate(Constants.APP_KEY_PHOTO_BROWSER, this.dataSource);
    if (geometryTapIndex !== undefined && geometryTransitionString !== undefined) {
      this.jumpToSelectPhotoBrowserGeometryTransition(
        targetIndex, name, item, geometryTapIndex, geometryTransitionString);
    } else {
      this.jumpToSelectPhotoBrowserNormal(targetIndex, name, item);
    }
  }

  private onDataReloaded(): void {
    Log.info(TAG, 'ON_DATA_RELOADED');
    if (this.deleteMode) {
      animateTo({
        duration: 300, // 删除动画时长
        curve: Curves.cubicBezier(0.0, 0.0, 0.2, 1.0) // 减速曲线参数
      }, (): void => {
        this.dataSource?.onDataReloaded();
      })
      this.deleteMode = false;
    } else {
      if (this.dataSource != null) this.dataSource.onDataReloaded();
    }
  }

  private initDateText(): void {
    let scrollMediaItem: MediaItem = this.dataSource == null ? new MediaItem() : this.dataSource.getMediaItemByPosition(0) as MediaItem;
    this.dateText = DateUtil.getLocalizedYearAndMonth(scrollMediaItem.getDataTaken());
  }

  jumpToPhotoBrowserNormal(targetIndex: number, name: string, item: MediaItem) {
    router.pushUrl({
      url: 'pages/PhotoBrowser',
      params: {
        position: targetIndex,
        transition: name,
        leftBlank: this.leftBlank,
      }
    });
  }

  jumpToPhotoBrowserGeometryTransition(targetIndex: number, name: string, item: MediaItem, geometryTapIndex: number,
                                       geometryTransitionString: string) {
    interface Msg {
      position: number;
      transition: string;
      leftBlank: number[];
    }

    const params: Msg = {
      position: targetIndex,
      transition: name,
      leftBlank: this.leftBlank,
    };
    this.browserController.showBrowser(geometryTapIndex, geometryTransitionString, TAG, params);
  }

  jumpToSelectPhotoBrowserNormal(targetIndex: number, name: string, item: MediaItem) {
    router.pushUrl({
      url: 'pages/SelectPhotoBrowser',
      params: {
        position: targetIndex,
        transition: name,
      }
    });
  }

  jumpToSelectPhotoBrowserGeometryTransition(targetIndex: number, name: string, item: MediaItem,
                                             geometryTapIndex: number, geometryTransitionString: string) {
    interface Params {
      position: number;
      transition: string;
      leftBlank: number[];
    }

    const params: Params = {
      position: targetIndex,
      transition: name,
      leftBlank: this.leftBlank,
    };
    this.browserController.showSelectBrowser(geometryTapIndex, geometryTransitionString, TAG, params);
  }

  onPageShow() {
  }

  aboutToDisappear(): void {
    Log.debug(TAG, 'aboutToDisappear');
    ScreenManager.getInstance().off(ScreenManager.ON_WIN_SIZE_CHANGED, this.onWindowSizeChangeCallBack);
    this.dataSource?.unregisterCallback('updateGroupData');
    this.dataSource?.unregisterCallback('updateCount');
    if (this.appBroadCast != null) {
      this.appBroadCast.off(BroadCastConstants.BACK_PRESS_EVENT, this.backPressEventFunc);
      this.appBroadCast.off(BroadCastConstants.ON_TAB_CHANGED, this.onTableChangedFunc);
      this.appBroadCast.off(BroadCastConstants.RESET_STATE_EVENT, this.resetStateEventFunc);
      this.appBroadCast.off(BroadCastConstants.UPDATE_DATA_SOURCE, this.updateDataSourceFunc);
      this.appBroadCast.off(BroadCastConstants.RESET_ZERO, this.resetZeroFunc);
    }
    if (this.broadCast != null) {
      this.broadCast.off(Constants.ON_LOADING_FINISHED, this.onLoadingFinishedFunc);
      this.broadCast.off(BroadCastConstants.SELECT, this.selectFunc);
      this.broadCast.off(BroadCastConstants.GROUP_SELECT, this.groupSelectFunc);
      this.broadCast.off(BroadCastConstants.JUMP_PHOTO_BROWSER, this.jumpPhotoBrowserFunc);
      this.broadCast.off(BroadCastConstants.JUMP_THIRD_PHOTO_BROWSER, this.jumpThirdPhotoBrowserFunc);
      this.broadCast.off(BroadCastConstants.ON_DATA_RELOADED, this.onDataReloadedFunc);
      this.broadCast.off(BroadCastConstants.INIT_DATE_TEXT, this.initDateTextFunc);
    }
  }

  updateGroupSelectMode(): void {
    let groups: TimelineData[] = this.dataSource == null ? [] : this.dataSource.groups;
    if (this.groupSelectMode.length == 0) {
      Log.info(TAG, 'first updateGroupSelectMode');
      for (let i = 0; i < groups.length; i++) {
        this.groupSelectMode.push(this.mSelectManager.isGroupSelected(i));
      }
    } else {
      Log.info(TAG, 'no first updateGroupSelectMode');
      for (let i = 0; i < groups.length; i++) {
        Log.info(TAG, 'update one');
        this.groupSelectMode[i] = this.mSelectManager.isGroupSelected(i);
      }
    }
  }

  updateRightClickMenuList() {
    this.rightClickMenuList = this.isSelectedMode
      ? [Action.DELETE, Action.ADD, Action.INFO]
      : [Action.MULTISELECT, Action.DELETE, Action.ADD, Action.INFO];
  }

  updateYearMap(): void {
    Log.info(TAG, 'updateYearMap');
    let groups: TimelineData[] = this.dataSource == null ? [] : this.dataSource.groups;
    if (groups.length == 0) {
      Log.error(TAG, 'year length is 0');
      return;
    }
    this.yearData = [];

    let startGroup: TimelineData = groups[0];
    let count: number = startGroup.count as number;
    let startTime: number = startGroup.startDate as number;
    let endTime: number = startGroup.startDate as number;

    for (let i = 1; i < groups.length; i++) {
      let dateTaken: number = groups[i].startDate as number;
      if (DateUtil.isTheSameYear(startTime, dateTaken)) {
        count = count + groups[i].count as number;
        endTime = dateTaken;
      } else {
        let groupData = new TimelineData(startTime, endTime, count);
        this.yearData.push(groupData);
        count = groups[i].count as number;
        startTime = dateTaken;
        endTime = dateTaken;
      }
    }
    let groupData = new TimelineData(startTime, endTime, count);
    this.yearData.push(groupData);
    Log.info(TAG, 'updateYearMap end');
  }

  onIndexChange(): void {
    Log.info(TAG, `onIndexChange ${this.TimelinePageIndex}`);
    if (this.TimelinePageIndex != Constants.INVALID && this.dataSource != null) {
      this.scroller.scrollToIndex(this.dataSource.getPositionByIndex(this.TimelinePageIndex));
    }
  }

  onIndexBackPress(callback: Function): void {
    if (this.isInCurrentTab) {
      callback(this.onModeChange());
    }
  }

  onTabChanged(index: number): void {
    if (index == Constants.TIMELINE_PAGE_INDEX) {
      this.isInCurrentTab = true;
      this.onActive();
    } else {
      this.isInCurrentTab = false;
      this.onModeChange();
      this.onInActive();
    }
  }

  onStateReset(index: number): void {
    if (index == Constants.TIMELINE_PAGE_INDEX) {
      this.onModeChange();
    }
  }

  resetZero(pageNumber: number): void {
    if (pageNumber == Constants.TIMELINE_PAGE_INDEX) {
      this.scroller.scrollEdge(Edge.Top);
    }
  }

  onMenuClicked(action: Action): void {
    Log.info(TAG, `onMenuClicked, actionID: ${action.actionID}`);
    let menuContext: MenuContext;
    let menuOperation: MenuOperation;
    if (action === Action.CANCEL) {
      this.onModeChange();
    } else if (action === Action.MULTISELECT) {
      this.isSelectedMode = true;
    } else if (action === Action.SELECT_ALL) {
      this.mSelectManager.selectAll(true);
    } else if (action === Action.DESELECT_ALL) {
      this.mSelectManager.deSelectAll();
    } else if (action === Action.DELETE) {
      menuContext = new MenuContext();
      menuContext
        .withSelectManager(this.mSelectManager)
        .withFromSelectMode(this.isSelectedMode)
        .withOperationStartCallback((): void => this.onDeleteStart())
        .withOperationEndCallback((): void => this.onDeleteEnd())
        .withBroadCast(this.broadCast);
      menuOperation = MenuOperationFactory.getInstance()
        .createMenuOperation(BatchDeleteMenuOperation, menuContext);
      menuOperation.doAction();
    } else if (action === Action.SHARE) {
      menuContext = new MenuContext();
      menuContext.withFromSelectMode(true).withSelectManager(this.mSelectManager);
      menuOperation = MenuOperationFactory.getInstance()
        .createMenuOperation(ShareMenuOperation, menuContext);
      menuOperation.doAction();
    } else if (action === Action.INFO) {
      this.hidePopup = true;
      this.openDetailsDialog();
    } else if (action === Action.ADD) {
      this.mSelectManager.getSelectedItems((selectedItems: Array<MediaItem>) => {
        Log.info(TAG, `Get selected items success, size: ${selectedItems.length}`);
        this.routeToSelectAlbumPage(MediaOperationType.Add, selectedItems);
      })
    }
  }

  routeToSelectAlbumPage(pageType: string, selectedItems: Array<MediaItem>): void {
    Log.info(TAG, 'Route to select album page');
    router.pushUrl({
      url: 'pages/MediaOperationPage',
      params: {
        pageFrom: Constants.MEDIA_OPERATION_FROM_TIMELINE,
        pageType: pageType,
        selectedItems: selectedItems
      }
    });
    this.routerStart = true;
  }

  async openDetailsDialog(): Promise<void> {
    if (this.totalSelectedCount == 0) {
      Log.error(TAG, 'no select error');
      return;
    } else if (this.totalSelectedCount == 1) {
      Log.info(TAG, 'totalSelectedCount is 1');
      await this.mSelectManager.getSelectedItems((selectItems: MediaItem[]) => {
        Log.info(TAG, `openDetailsDialog selectItems.length: ${selectItems.length}`);
        if (selectItems.length != 1) {
          Log.error(TAG, 'get selectItems is error');
          return;
        }
        this.broadCast.emit(BroadCastConstants.SHOW_DETAIL_DIALOG, [selectItems[0], false]);
      });
    } else {
      await this.mSelectManager.getSelectedItems((selectItems: MediaItem[]) => {
        Log.info(TAG, `openDetailsDialog selectItems.length: ${selectItems.length}`);
        if (selectItems.length <= 1) {
          Log.error(TAG, 'get selectItems is error');
          return;
        }
        let size = 0;
        selectItems.forEach((item) => {
          Log.info(TAG, `openDetailsDialog item.size: ${item.size}`);
          size = size + item.size;
        })

        Log.info(TAG, `openDetailsDialog size: ${size}`);
        this.broadCast.emit(BroadCastConstants.SHOW_MULTI_SELECT_DIALOG, [this.totalSelectedCount, size]);
      });
      return;
    }
  }

  onDeleteStart(): void {
    Log.info(TAG, `onDeleteStart`);
    this.deleteMode = true;
    this.isDataFreeze = true;
    if (this.dataSource != null) {
      this.dataSource.unregisterTimelineObserver();
      this.dataSource.freeze();
    }
  }

  onDeleteEnd(): void {
    Log.info(TAG, `onDeleteEnd`);
    this.isDataFreeze = false;
    this.onModeChange();
    if (this.dataSource != null) {
      this.dataSource.registerTimelineObserver();
      this.dataSource.onChange('image');
      this.dataSource.unfreeze();
    }
  }

  onCopyStart(): void {
    Log.info(TAG, `onCopyStart`);
    this.isDataFreeze = true;
    if (this.dataSource != null) {
      this.dataSource.unregisterTimelineObserver();
      this.dataSource.freeze();
    }

  }

  onCopyEnd(err: Object, count: number, total: number): void {
    Log.info(TAG, `onCopyEnd count: ${count}, total: ${total}`);
    this.isDataFreeze = false;
    this.onModeChange();
    if (this.dataSource != null) {
      this.dataSource.registerTimelineObserver();
      this.dataSource.onChange('image');
      this.dataSource.unfreeze();
    }
    if (err) {
      UiUtil.showToast($r('app.string.copy_failed_single'));
    }
  }

  onMoveStart(): void {
    Log.info(TAG, `onMoveStart`);
    this.isDataFreeze = true;
    if (this.dataSource != null) {
      this.dataSource.unregisterTimelineObserver();
      this.dataSource.freeze();
    }
  }

  onMoveEnd(err: Object, count: number, total: number): void {
    Log.info(TAG, `onMoveEnd count: ${count}, total: ${total}`);
    this.isDataFreeze = false;
    this.onModeChange();
    if (this.dataSource != null) {
      this.dataSource.registerTimelineObserver();
      this.dataSource.unfreeze();
      this.dataSource.switchRefreshOn();
      this.dataSource.onChange('image');
    }
    if (err) {
      UiUtil.showToast($r('app.string.move_failed_single'));
    }
  }

  onModeChange() {
    Log.debug(TAG, `onModeChange current mode ${this.isSelectedMode}`);
    if (this.isSelectedMode) {
      this.isSelectedMode = false;
      this.mSelectManager.onModeChange(false);
      this.updateGroupSelectMode();
      AppStorage.Delete(Constants.PHOTO_GRID_SELECT_MANAGER);
      return true;
    }
    return false;
  }

  // The callbacks after index page shows
  onIndexPageShow() {
    Log.info(TAG, `[onIndexPageShow] isShow=${this.isShow}, isInCurrentTab=${this.isInCurrentTab}`);
    if (this.isShow && this.isInCurrentTab) {
      let params: Params = router.getParams() as Params;
      if (this.routerStart && params != null && params.pageType != null) {
        Log.info(TAG, `MediaOperation back ${JSON.stringify(params)}`)
        if (params.pageType = MediaOperationType.Add) {
          this.addOperation(params.albumName, params.albumUri);
        }
      }
      this.routerStart = false;
      this.onActive();
    } else if (!this.isShow && this.isInCurrentTab) {
      this.onInActive();
    } else {
    }
  }

  // The callback when current page is in the foreground
  onActive() {
    if (!this.isActive) {
      Log.info(TAG, 'onActive');
      this.isActive = true;

      this.dataSource?.onActive();
      if (this.isSelectedMode) {
        this.totalSelectedCount = this.mSelectManager.getSelectedCount();
        this.dataSource?.forceUpdate();
      }
    }
  }

  // The callback when current page is in the background
  onInActive() {
    if (this.isActive) {
      Log.info(TAG, 'onInActive');
      this.isActive = false;
      this.dataSource?.onInActive();
    }
  }

  getGeometryTransitionId(item: ViewData, index: number): string {
    let mediaItem = item.mediaItem as MediaItem;
    if (mediaItem) {
      return TAG + mediaItem.getHashCode() + this.mSelectManager.isItemSelected(mediaItem.uri, item.viewIndex);
    } else {
      return TAG + item.viewIndex;
    }
  }

  build() {
    Stack() {
      Column() {
        if (this.isEmpty) {
          NoPhotoIndexComponent({ index: Constants.TIMELINE_PAGE_INDEX, hasBarSpace: true })
        } else {
          TimelinePageActionBar({
            onMenuClicked: (action: Action): void => this.onMenuClicked(action),
            totalSelectedCount: $totalSelectedCount
          });

          Stack() {
            Grid(this.scroller, this.layoutOptions) {
              LazyForEach(this.dataSource as TimelineDataSource, (item: ViewData, index?: number) => {
                if (!!item) {
                  if (item.viewType == ViewType.GROUP_TITLE) {
                    GridItem() {
                      TimelineTitleComponent({
                        groupData: item.viewData,
                        mPosition: item.viewIndex,
                        isSelected: this.groupSelectMode[item.viewIndex]
                      })
                    }
                    .key('TimelinePage_GridItem' + index)
                  } else if (item.viewType == ViewType.ITEM) {
                    GridItem() {
                      ImageGridItemComponent({
                        dataSource: this.dataSource,
                        item: item.mediaItem,
                        mPosition: item.viewIndex,
                        isSelected: this.isSelectedMode ? this.mSelectManager.isItemSelected((item.mediaItem as MediaItem).uri as string, item.viewIndex) : false,
                        pageName: Constants.PHOTO_TRANSITION_TIMELINE,
                        onMenuClicked: (action: Action): void => this.onMenuClicked(action),
                        onMenuClickedForSingleItem: (action: Action, currentPhoto: MediaItem): void => this.onMenuClickedForSingleItem(action, currentPhoto),
                        geometryTransitionString: this.getGeometryTransitionId(item, index as number),
                        selectedCount: $totalSelectedCount
                      })
                    }
                    .aspectRatio(1)
                    .key('TimelinePage_GridItem' + index)
                    .zIndex(index === this.placeholderIndex ? 1 : 0)
                  }
                }
              }, (item: ViewData, index?: number) => {
                if (item == null || item == undefined) {
                  return (JSON.stringify(item) + index) as string;
                }
                if (item.viewType == ViewType.GROUP_TITLE) {
                  return (JSON.stringify(item.viewData) + this.groupSelectMode[item.viewIndex]) as string;
                } else {
                  return this.getGeometryTransitionId(item, index as number) as string;
                }
              })
            }
            .edgeEffect(EdgeEffect.Spring)
            .columnsTemplate('1fr '.repeat(this.gridRowCount))
            .scrollBar(BarState.Off)
            .columnsGap(Constants.GRID_GUTTER)
            .rowsGap(Constants.GRID_GUTTER)
            .cachedCount(Constants.GRID_CACHE_ROW_COUNT)
            .onScrollIndex((first) => {
              let scrollMediaItem: MediaItem | null = this.dataSource == null ? null : this.dataSource.getMediaItemByPosition(first) as MediaItem;
              if (scrollMediaItem?.getDataTaken()) {
                this.dateText = DateUtil.getLocalizedYearAndMonth(scrollMediaItem.getDataTaken());
                Log.debug(TAG, `scrollIndex=${first}, dateTaken=${scrollMediaItem.getDataTaken()}`);
              } else {
                Log.warn(TAG, `scrollIndex ${first} out of active window`);
              }
            })

            if (this.isShowScrollBar) {
              TimelineScrollBar({ scroller: this.scroller })
            }
          }
          .layoutWeight(1)
        }
      }
      .alignItems(HorizontalAlign.Start)
      .justifyContent(FlexAlign.Start)
      .margin({
        bottom: this.isHorizontal ? 0 : $r('app.float.tab_bar_vertical_height')
      })

      if (this.isSelectedMode) {
        TimelinePageToolBar({
          onMenuClicked: (action: Action): void => this.onMenuClicked(action),
          totalSelectedCount: $totalSelectedCount
        })
      }
      CustomDialogView({ broadCast: $broadCast })
    }
  }

  private onMenuClickedForSingleItem(action: Action, currentPhoto: MediaItem) {
    Log.info(TAG, `single menu click, action: ${action?.actionID}, currentUri: ${currentPhoto?.uri}`);
    if (currentPhoto == undefined) {
      return;
    }
    let menuOperation: MenuOperation;
    let menuContext: MenuContext;
    if (action === Action.DELETE) {
      menuContext = new MenuContext();
      menuContext.withMediaItem(currentPhoto).withBroadCast(this.broadCast);
      menuOperation = MenuOperationFactory.getInstance()
        .createMenuOperation(DeleteMenuOperation, menuContext);
      menuOperation.doAction();
    } else if (action === Action.ADD) {
      this.isMvOrCpSeparatesItem = true;
      this.mvOrCpSeparatesItem = currentPhoto;
      this.routeToSelectAlbumPage(MediaOperationType.Add, [currentPhoto]);
    } else if (action === Action.INFO) {
      this.broadCast.emit(BroadCastConstants.SHOW_DETAIL_DIALOG, [currentPhoto, false]);
    }
  }

  // Calculate the number of squares per row
  private initGridRowCount(): void {
    let sideBarWidth = this.isSidebar ? Constants.TAB_BAR_WIDTH : 0;
    let contentWidth = ScreenManager.getInstance().getWinWidth() - sideBarWidth;
    let margin = 0;
    let maxThumbWidth = px2vp(Constants.GRID_IMAGE_SIZE) * Constants.GRID_MAX_SIZE_RATIO;
    let newCount = Math.max(Constants.GRID_MIN_COUNT,
      Math.round(((contentWidth - Constants.NUMBER_2 * margin)
      + Constants.GRID_GUTTER) / (maxThumbWidth + Constants.GRID_GUTTER)));
    if (newCount != this.gridRowCount) {
      this.gridRowCount = newCount;
      //            this.dataSource.forceUpdate();
    }
    Log.info(TAG, `initGridRowCount contentWidth: ${contentWidth}`);
  }

  private async addOperation(albumName: string, albumUri: string) {
    let menuContext = new MenuContext();
    let onCopyStartFunc =  (): void => this.onCopyStart();
    if (this.isMvOrCpSeparatesItem) {
      menuContext.withMediaItem(this.mvOrCpSeparatesItem as MediaItem);
      this.onCopyStart && this.onCopyStart();
      this.isMvOrCpSeparatesItem = false;
      this.mvOrCpSeparatesItem = undefined;
    } else {
      menuContext.withSelectManager(this.mSelectManager).withOperationStartCallback(onCopyStartFunc);
    }
    menuContext.withOperationEndCallback((err: Object, count: number, total: number): void => this.onCopyEnd(err as Object, count, total))
      .withBroadCast(this.broadCast)
      .withTargetAlbumName(albumName).withAlbumUri(albumUri);
    let menuOperation = MenuOperationFactory.getInstance().createMenuOperation(AddMenuOperation, menuContext);
    menuOperation.doAction();
  }

  private onUpdateFavorState(item: MediaItem): void {
    Log.debug(TAG, 'onUpdateFavorState favor');
    if (this.dataSource != null) {
      let index = this.dataSource.getIndexByMediaItem(item);
      if (index == Constants.NOT_FOUND) return;
      let flushIndex = this.dataSource.getPositionByIndex(index);
      Log.debug(TAG, `onUpdateFavorState favor flushIndex ${flushIndex}`);
      this.dataSource.onDataChanged(flushIndex);
    }
  }
}