/*
 * Copyright (c) 2025 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.
 */

// [Start include]
import { backgroundTaskManager } from '@kit.BackgroundTasksKit';
import { BusinessError } from '@kit.BasicServicesKit';
// [End include]

// [Start request_suspend_delay]
let id: number = -1;         // 申请短时任务ID
let delayTime: number;  // 本次申请短时任务的剩余时间

// 申请短时任务
function requestSuspendDelay() {
  let myReason = 'test requestSuspendDelay';   // 申请原因
  try {
    let delayInfo = backgroundTaskManager.requestSuspendDelay(myReason, () => {
      // 回调函数。应用申请的短时任务即将超时，通过此函数回调应用，执行一些清理和标注工作，并取消短时任务
      console.info('suspend delay task will timeout');
      try {
        backgroundTaskManager.cancelSuspendDelay(id);
      } catch (error) {
        console.error(`Operation requestSuspendDelay failed. code is ${(error as BusinessError).code} message is ${(error as BusinessError).message}`);
      }
    })
    id = delayInfo.requestId;
    delayTime = delayInfo.actualDelayTime;
    console.info(`Operation requestSuspendDelay success. id is ${id} delayTime is ${delayTime}`);
  } catch (error) {
    console.error(`Operation requestSuspendDelay failed. code is ${(error as BusinessError).code} message is ${(error as BusinessError).message}`);
  }
}
// [End request_suspend_delay]

// [Start get_time]
async function getRemainingDelayTime() {
  backgroundTaskManager.getRemainingDelayTime(id).then((res: number) => {
    console.info(`Succeeded in getting remaining delay time. time is ${res}`);
  }).catch((err: BusinessError) => {
    console.error(`Failed to get remaining delay time. Code: ${err.code}, message: ${err.message}`);
  })
}
// [End get_time]

// [Start cancel_suspend_delay]
function cancelSuspendDelay() {
  try {
    backgroundTaskManager.cancelSuspendDelay(id);
    console.info('Operation cancelSuspendDelay Succeeded.');
  } catch (error) {
    console.error(`Operation cancelSuspendDelay failed. code is ${(error as BusinessError).code} message is ${(error as BusinessError).message}`);
  }
}
// [End cancel_suspend_delay]

@Component
export struct TransientTaskDialog {
 @State requestId: number = -1;

  build() {
    Column() {
      Row(){
        Text($r('app.string.transient_task_id')).fontSize(20);
        Text(this.requestId.toString()).fontSize(20).id('transient_task_id');
      }
      Button($r('app.string.request_suspend_delay'))
        .id('request_suspend_delay')
        .fontSize(20)
        .margin({ top: 10, bottom: 10 })
        .type(ButtonType.Capsule)
        .backgroundColor($r('app.color.background'))
        .size({ width: '70%', height: '8%' })
        .onClick(() => {
          requestSuspendDelay();
          this.requestId = id;
        })
      Button($r('app.string.get_remaining_delay_time'))
        .id('get_remaining_delay_time')
        .fontSize(20)
        .margin({ top: 10, bottom: 10 })
        .type(ButtonType.Capsule)
        .backgroundColor($r('app.color.background'))
        .size({ width: '70%', height: '8%' })
        .onClick(() => {
          getRemainingDelayTime();
        })
      Button($r('app.string.cancel_suspend_delay'))
        .id('cancel_suspend_delay')
        .fontSize(20)
        .margin({ top: 10, bottom: 10 })
        .type(ButtonType.Capsule)
        .backgroundColor($r('app.color.background'))
        .size({ width: '70%', height: '8%' })
        .onClick(() => {
          cancelSuspendDelay();
        })
    }.width('100%')
    .margin({ top: 5 })
  }
}