// app
import { s3 as ownS3 } from '@ownzones/lib';
import { S3ByteProvider, MxfFileReader } from '@ownzones/imf';
import { ITimedTextSegment } from '../playlist-builder';
import { ISegmentTranscoder, ISegmentTranscodeResult } from './segment-transcoder';

export class TimedTextSegment implements ISegmentTranscoder {
  private readonly segment: ITimedTextSegment;

  public constructor(segment: ITimedTextSegment) {
    this.segment = segment;
  }

  public async transcode(): Promise<ISegmentTranscodeResult> {
    const { url } = this.segment;

    const { bucket, key } = ownS3.parseUrl(url as string);
    const mxfFileReader = new MxfFileReader(new S3ByteProvider(bucket, key));

    return { segmentData: await mxfFileReader.extractEssence() };
  }
}