import { TheoryINote } from "../interface/TheoryINote";
export class Grace {
  /**
   *
   * 添加 grace 信息到 note 上, 给算法发答案
   * @static addGraceInformation
   * @param {INote[]} noteList_
   * @memberof GraceNote
   */
  public static addGraceInformation(noteList_: TheoryINote[]) {
    // 记录下有几个voice在这个曲子中, 要循环几遍
    let voiceRecorderArray: number[] = [];
    for (let i = 0; i < noteList_.length; i++) {
      const noteVoice = noteList_[i].voice;

      if (voiceRecorderArray.indexOf(noteVoice) < 0) {
        voiceRecorderArray.push(noteVoice);
      }
    }
    // 开始先把同一个voice的都放在一个Array中
    let graceAccumulation = 0;
    for (let j = 0; j < voiceRecorderArray.length; j++) {
      let sameVoiceNoteArray: TheoryINote[] = [];
      for (let i = 0; i < noteList_.length; i++) {
        if (noteList_[i].voice === voiceRecorderArray[j]) {
          sameVoiceNoteArray.push(noteList_[i]);
        }
      }
      // 遍历该同voice的Note object array
      for (let m = 0; m < sameVoiceNoteArray.length; m++) {
        if (sameVoiceNoteArray[m].isGrace) {
          graceAccumulation++;
          sameVoiceNoteArray[m].hasGraceGroup = false;
        } else {
          // 如果是非grace note, 有两种, 一种是 grace note的主音 or 普通音符 (不用考虑 普通音符后面是否是和弦音)
          if (graceAccumulation > 0) {
            // 说明这个是主音
            sameVoiceNoteArray[m].hasGraceGroup = true;
            sameVoiceNoteArray[m].graceAccumulation = graceAccumulation;
            sameVoiceNoteArray[m].graceNotesPitch = [];
            for (let k = graceAccumulation; k >= 1; k--) {
              // // 把grace 信息打包到主音上, 发给 AI用
              // const gracePitch = TheoryPitch.calculatePitch(
              //   sameVoiceNoteArray[m - k].step!,
              //   sameVoiceNoteArray[m - k].pitchOctave!,
              //   sameVoiceNoteArray[m - k].alter
              // );
              sameVoiceNoteArray[m].graceNotesPitch.push(sameVoiceNoteArray[m - k].pitch);
            }
          } else {
            // 说明这个是普通音
            sameVoiceNoteArray[m].graceAccumulation = 0;
            sameVoiceNoteArray[m].hasGraceGroup = false;
          }
          // graceAccumulation 需要清空变成 0
          graceAccumulation = 0;
        }
      }
    }
  }
}