/*
 * Copyright (C) 2026 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 { CacheStrategy, ImageKnife, ImageKnifeComponent } from '@ohos/libraryimageknife';
import { router } from '@kit.ArkUI';

@Entry
@Component
struct CompareJpegPage {
  private smallJpeg = "small_jpeg/";
  private middleJpeg = "middle_jpeg/";
  private bigJpeg = "big_jpeg/";
  private currentJpegType = "";
  private urlPrefix: string = "https://gitee.com/Keke_planet/test-demos/raw/master/docPic/"
  @State private dataArr: Array<string> = []
  @State private enableOptimize: boolean = false;
  @State private cacheCount: number | undefined = 0;
  @State private showPics: boolean = true;

  aboutToAppear(): void {
    this.updateUrls(this.smallJpeg)
  }

  updateUrls(type: string) {
    ImageKnife.getInstance().removeAllMemoryCache();
    this.cacheCount = 0;

    let arr: Array<string> = []
    for (let i = 1; i <= 9; i++) {
      arr.push(this.urlPrefix + type + i + ".jpg")
    }

    if (type === this.currentJpegType) {
      // force to update
      this.showPics = false;
      setTimeout(() => {
        this.dataArr = arr;
        this.showPics = true;
      }, 100)
    } else {
      this.dataArr = arr;
    }
    this.currentJpegType = type;
  }

  aboutToDisappear(): void {
    ImageKnife.getInstance().setJpegOptimizeDecoding(false);
  }

  build() {
    Column() {
      Row() {
        Button("返回").onClick(() => {
          router.back()
        }).margin({ left: 10 })
      }.width("100%").justifyContent(FlexAlign.Start).margin({ top: 10 })

      if (this.showPics) {
        Grid() {
          ForEach(this.dataArr, (url: string) => {
            GridItem() {
              ImageKnifeComponent({
                imageKnifeOption: {
                  loadSrc: url,
                  objectFit: ImageFit.Cover,
                  border: { width: 1 },
                  onLoadListener: {
                    onLoadSuccess: () => {
                      this.cacheCount = ImageKnife.getInstance().getCurrentCacheSize(CacheStrategy.Memory)
                    }
                  }
                }
              }).width(120).height(150)
            }
          })
        }
      }

      Text(this.enableOptimize ? "已开启Jpeg解码优化" : "未开启Jpeg解码优化").margin({ top: 10 })
      Text("内存缓存占用量：" + this.cacheCount)

      Button((this.enableOptimize ? "关闭Jpeg解码优化" : "开启Jpeg解码优化") + " 并重新加载").onClick(() => {
        this.enableOptimize = !this.enableOptimize;
        ImageKnife.getInstance().setJpegOptimizeDecoding(this.enableOptimize)
        this.updateUrls(this.currentJpegType)
      }).margin(10)

      Button("清空内存缓存，并重新加载jpeg小图").onClick(() => {
        this.updateUrls(this.smallJpeg)
      }).margin({ bottom: 10 })

      Button("清空内存缓存，并重新加载jpeg中图").onClick(() => {
        this.updateUrls(this.middleJpeg)
      }).margin({ bottom: 10 })

      Button("清空内存缓存，并重新加载jpeg大图").onClick(() => {
        this.updateUrls(this.bigJpeg)
      }).margin({ bottom: 10 })

    }.width("100%").height("100%")
  }
}