import media from '@ohos.multimedia.media';
import { BusinessError } from '@ohos.base';
import common from '@ohos.app.ability.common';
import { VoiceTag } from '../config';

type AVPlayerCallback = (status: string, val?: string) => void;

export class voiceService {
  private avPlayer: media.AVPlayer | null = null;
  private fileSize: number = -1;
  private fd: number = 0;
  private playerName: string = '';
  private type: number = 1;
  private endFlag: Boolean = false;
  private mediaArray: Array<string> = [];
  private callBack: AVPlayerCallback | null = null;
  private context: common.UIAbilityContext

  constructor(callBack: AVPlayerCallback, context: common.UIAbilityContext) {
    this.context = context
    // 创建avPlayer实例对象
    media.createAVPlayer().then(video => {
      this.avPlayer = video
      // 创建状态机变化回调函数
      this.callBack = callBack
      this.setAVPlayerCallback(this.callBack);
    })
  }

  // 注册avplayer回调函数
  setAVPlayerCallback(callBack: AVPlayerCallback) {
    console.log(VoiceTag, ' avPlayerFdSrc setAVPlayerCallback begin')

    // error回调监听函数,当avPlayer在操作过程中出现错误时调用reset接口触发重置流程
    this.avPlayer!.on('error', (err: BusinessError) => {
      console.error(VoiceTag, `Invoke avPlayer failed, code is ${err.code}, message is ${err.message}`);
      this.avPlayer!.reset(); // 调用reset重置资源，触发idle状态
    })


    // 状态机变化回调函数
    this.avPlayer!.on('stateChange', async (state, reason) => {
      switch (state) {
        case 'idle': // 成功调用reset接口后触发该状态机上报
          // callBack('idle');
          console.log(VoiceTag, ' AVPlayer idle')
          if (this.type == 3) {
            if (this.mediaArray.length && !this.endFlag) {
              this.mediaArray.splice(0, 1)
              this.avPlayerFdSrc(this.mediaArray[0])
            } else {
              callBack('idle');
            }
            return
          }
          callBack('idle', this.playerName);
          break;
        case 'initialized': // avplayer 设置播放源后触发该状态上报
          console.info(VoiceTag, ' AVPlayerstate initialized called.');
          this.avPlayer!.prepare().then(() => {
            console.info(VoiceTag, ' AVPlayer prepare succeeded.');
          }, (err: BusinessError) => {
            console.error(VoiceTag, ` Invoke prepare failed, code is ${err.code}, message is ${err.message}`);
          });
          callBack('initialized');
          break;
        case 'prepared': // prepare调用成功后上报该状态机
          this.avPlayer!.play();
          callBack('prepared');
          break;
        case 'playing': // play成功调用后触发该状态机上报
          callBack('playing');
          break;
        case 'paused': // pause成功调用后触发该状态机上报
          callBack('paused');
          break;
        case 'completed': // 播放结束后触发该状态机上报
          console.info(VoiceTag, ' AVPlayer state completed called.');
          this.avPlayer!.stop(); //调用播放结束接口

          break;
        case 'stopped': // stop接口成功调用后触发该状态机上报
          console.info(VoiceTag, ' AVPlayer state stopped called.');
          this.avPlayer!.reset(); // 调用reset接口初始化avplayer状态
          // callBack('stopped');
          break;
        case 'released':
          console.info(VoiceTag, ' AVPlayer state released called.');
          callBack('released');
          break;
        default:
          console.info(VoiceTag, ' AVPlayer state unknown called.');
          callBack('unknown');
          break;
      }
    })
  }

  // 以下为使用资源管理接口获取打包在HAP内的媒体资源文件并通过fdSrc属性进行播放示例
  avPlayerFdSrc(name: string) {
    const context = this.context
    context.resourceManager.getRawFd(name, async (error, value) => {
      if (error != null) {
        console.log(VoiceTag, ` callback getRawFd failed error code: ${error.code}, message: ${error.message}.`);
      } else {
        console.log(VoiceTag, this.avPlayer)
        if (this.avPlayer) {
          await this.avPlayer!.reset()
          this.avPlayer!.fdSrc = value;
        }

        // 为fdSrc赋值触发initialized状态机上报
        // this.avPlayer.play()
        console.info(VoiceTag, " click me after success value.fd " + JSON.stringify(value));
      }
    });
  }

  // 以下为通过url设置网络地址来实现播放直播码流的
  avPlayerLive(url: string) {
    this.avPlayer!.url = url
  }

  releasePlayer() {
    this.avPlayer && this.avPlayer!.release();
  }

  avPlayerStop() {
    this.avPlayer && this.avPlayer!.stop((err: BusinessError) => {
      if (err == null) {
        this.endFlag = true
        console.info(VoiceTag, 'stop success');
      } else {
        console.error(VoiceTag, 'stop filed,error message is :' + err.message)
      }
    })
  }

  playAudio(param: playParams) {
    this.endFlag = false
    this.mediaArray = []
    this.type = param.type ?? 1;
    if (param.type == 1) {
      this.playerName = param.name || ""
      // this.nextPlayerName=param.nextName
      this.avPlayerFdSrc(param.name || "");
    } else if (param.type == 2) {
      this.avPlayerLive(param.url!);
    } else if (param.type == 3) {
      if (param.value && param.value.length) {
        this.mediaArray = param.value;
        this.avPlayerFdSrc(param.value[0]);
      }
    }
  }

  // private callBack = function (value) {
  // }
}

interface playParams {
  type?: number,
  name?: string,
  url?: string,
  value?: string[]
}