import { TheoryINote } from "../interface/TheoryINote";
import { TheoryBeats } from "../../beats/TheoryBeats";
import { TheoryMath } from "../../../util/TheoryMath";
import { TheoryConstant } from "../../../util/TheoryConstant";
export class TheoryDuration {
  public static addNoteDuration(noteList_: TheoryINote[], Beats_: TheoryBeats) {
    // Array 记录同音连符的其实音符的 id
    const tieRecorderBank: number[] = [];
    /**
     *开始算staff1上的duration, 注意要排除 grace note
     */
    for (let i = 0; i < noteList_.length; i++) {
      // 如果没有同音连线
      if (!noteList_[i].isTieGroup) {
        // 如果没有同音连线,并且没有staccato
        if (!noteList_[i].isStaccato) {
          noteList_[i].duration = TheoryMath.keepDigitals(
            (noteList_[i].beats + noteList_[i].beatsDot) * Beats_.unit64Beats,
            3
          );
        }
        // 如果没有同音连线, 但是有staccato
        else {
          // 该音符是大于16音符(全,2,4,8, 16), 都按16分音符换算, 因此 64/16=4
          if (noteList_[i].type <= 16) {
            noteList_[i].duration = TheoryMath.keepDigitals(4 * Beats_.unit64Beats, 3);
          }
          // 如果没有同音连线, 但是有staccato, 并且该音符是小于16音符(32,64),按自身去算
          else {
            noteList_[i].duration = TheoryMath.keepDigitals(
              (noteList_[i].beats + noteList_[i].beatsDot) * Beats_.unit64Beats,
              3
            );
          }
        }
        noteList_[i].originalDuration = noteList_[i].duration;
      }
      // 如果该音符为同音连线相关音符 两个或多个同音连线链接
      else {
        // 首先默认赋值 duration
        noteList_[i].duration = TheoryMath.keepDigitals(
          (noteList_[i].beats + noteList_[i].beatsDot) * Beats_.unit64Beats,
          3
        );
        noteList_[i].originalDuration = noteList_[i].duration;
        // 并且不是最后一个(同音连符都出现在小节中间)
        if (
          // 同音连服第一个音
          noteList_[i].tie1 === "start" &&
          noteList_[i].tie2 === null
        ) {
          tieRecorderBank.push(noteList_[i].svgID);
        } else {
          let firstTieNotedIndex = tieRecorderBank[0];
          if (noteList_[firstTieNotedIndex] !== undefined) {
            noteList_[firstTieNotedIndex].duration = TheoryMath.keepDigitals(
              noteList_[firstTieNotedIndex].duration + noteList_[i].duration,
              3
            );
          }
          // 最后在把这个note的 原始 duration 变成0;
          noteList_[i].duration = 0;
          if (noteList_[i].tie1 === "stop" && noteList_[i].tie2 === null) {
            tieRecorderBank.shift();
          }
        }
      }
    }
  }

  public static addGraceNoteDuration(graceNoteList_: TheoryINote[]) {
    graceNoteList_.forEach((graceNote) => {
      graceNote.duration = TheoryConstant.graceNoteDuration;
    });
  }
}