/*
 * Copyright (C) 2024 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 { connection } from '@kit.NetworkKit'
import { List } from '@kit.ArkTS'
import { ImageKnifeRequest,ImageKnife,ImageKnifeComponent } from '@ohos/libraryimageknife'
import { PageViewModel } from './model/PageViewModel'

@Entry
@Component
struct ImageKnifeReload {
  @State index: number = 0
  aboutToAppear(): void {
    NetWatchState.init()
  }
  build() {
    Column() {
      ImageKnifeComponent({
        imageKnifeOption:{
          loadSrc:PageViewModel.getMenus()[0],
          placeholderSrc:$r('app.media.loading'),
          errorholderSrc:$r('app.media.failed'),
          onLoadListener:{
            onLoadFailed(err,request){
              NetWatchState.requestList.add(request)
            }
          }
        }
      }).width(200).height(200)
      ImageKnifeComponent({
        imageKnifeOption:{
          loadSrc:PageViewModel.getMenus()[2],
          placeholderSrc:$r('app.media.loading'),
          errorholderSrc:$r('app.media.failed'),
          onLoadListener:{
            onLoadFailed(err,request){
              NetWatchState.requestList.add(request)
            }
          }
        }
      }).width(200).height(200).margin({top:10})
      Text("重试5次：" + this.index)
      ImageKnifeComponent({
        imageKnifeOption:{
          loadSrc:PageViewModel.getMenus()[2],
          placeholderSrc:$r('app.media.loading'),
          errorholderSrc:$r('app.media.failed'),
          onLoadListener:{
            onLoadFailed:(err,request) => {
              this.index++
              if(request != undefined && this.index < 5) {
                ImageKnife.getInstance().reload(request)
              }
            }
          }
        }
      }).width(200).height(200).margin({top:10})
    }.width('100%')
    .height('100%')
  }
}

class NetWatchState {
  public static netConnection: connection.NetConnection | undefined = undefined
  public static requestList: List<ImageKnifeRequest> = new List()

  static init() {
    NetWatchState.netConnection = connection.createNetConnection()
    // 注册订阅事件
    NetWatchState.netConnection.register(()=>{
    })
    // 订阅网络能力变化事件。调用register后，才能接收到此事件通知
    NetWatchState.netConnection.on('netCapabilitiesChange',(data:connection.NetCapabilityInfo)=>{
      if(NetWatchState.requestList.length > 0 && data.netHandle.netId >= 100) {
        NetWatchState.requestList.forEach((request)=>{
          ImageKnife.getInstance().reload(request)
          NetWatchState.requestList.remove(request)
        })
      }
    })
  }

  static cancel(){
    if(NetWatchState.netConnection != undefined) {
      // 取消订阅
      NetWatchState.netConnection.unregister(()=>{})
    }
  }
}