export interface Platform<WidgetFactory = any> {
  name: string;

  // screen
  getScreenSize(): [width: number, height: number];

  // ui
  createUILayer({ z_index }: { z_index: number }): WidgetFactory;
  deleteUILayer(widgetFactory: WidgetFactory): void;

  // fs
  isFileSync({ path }: { path: string }): boolean;
  readdirSync(option: Platform.readdirSync.Option): Platform.readdirSync.Result;
  statSync(option: Platform.statSync.Option): Platform.statSync.Result;
  readFileSync(
    option: Platform.readFileSync.Option
  ): Platform.readFileSync.Result;
  writeFileSync(option: Platform.writeFileSync.Option): void;

  getImageInfo(img_path: string):
    | {
        width: number;
        height: number;
      }
    | Promise<{
        width: number;
        height: number;
      }>;

  // timer & async
  getTime(): number; // in Utc

  // audio
  createAudioPlayer(): Platform.AudioPlayer;
  releaseAudioPlayer(audio_player: Platform.AudioPlayer): void;

  setFrameInterval(callback: () => void): void;
}

export declare namespace Platform {
  export interface AudioPlayer {
    onPrepared?: (success: boolean) => void | undefined;
    onCompleted?: () => void | undefined;
    prepare(): void;
    start(): void;
    stop(): void;
    release(): void;
    getMediaInfo(): MediaInfo;
    setSource({ path }: { path: string }): void; //TODO path? file?
  }

  export interface MediaInfo {
    title: string | undefined;
    artist: string | undefined;
    duration: number;
  }

  export namespace readdirSync {
    interface Option {
      /**
       * @zh 目录路径
       * @en Directory path
       */
      path: string;
    }

    /**
     * @zh 如果返回 `undefined` 则目录不存在，否则返回文件名数组
     * @en If `undefined` is returned, the directory does not exist, otherwise an array of filenames is returned
     */
    type Result = Array<string> | undefined;
  }

  export namespace statSync {
    interface Option {
      /**
       * @zh 路径
       * @en path
       */
      path: string;
    }

    /**
     * @zh 如果返回 `undefined` 则目标文件不存在，否则返回文件信息对象
     * @en If `undefined` is returned, the target file does not exist, otherwise the file information object is returned
     */
    type Result = FSStat | undefined;

    /**
     * @output
     */
    interface FSStat {
      /**
       * @zh 文件大小（单位为字节）
       * @en The size of the file in bytes
       */
      size: number;
    }
  }

  export namespace readFileSync {
    interface Option {
      /**
       * @zh 文件路径
       * @en path
       */
      path: string;
      /**
       * @zh 其他选项
       * @en Other Options
       */
      options?: Options;
    }

    interface Options {
      /**
       * @zh 当指定了编码方式之后，API 返回结果为 `string`
       * @en When the encoding method is specified, the API returns `string` as the result
       */
      encoding?: string;
    }

    /**
     * @zh 文件内容。如果返回 `undefined`，则表明读取文件失败
     * @en File content. If `undefined` is returned, the file failed to be read
     */
    type Result = ArrayBuffer | string | undefined;
  }

  export namespace writeFileSync {
    interface Option {
      /**
       * @zh 文件路径或者文件句柄
       * @en File path or file descriptor
       */
      path: string | number;
      /**
       * @zh 写入目标文件的数据
       * @en Data to be written to the target file
       */
      data: ArrayBuffer | string | DataView;
      /**
       * @zh 其他选项
       * @en Other Options
       */
      options?: Options;
    }

    interface Options {
      /**
       * @zh 如果数据格式为 `string`，需要指定编码方式
       * @en If the `data` format is `string`, you need to specify the encoding method
       * @defaultValue utf8
       */
      encoding?: string;
    }
  }
}

export default Platform;