import { TheoryINote, stepTypeMap, synthesizeSign } from "../interface/TheoryINote";
import { TheoryPitch } from "../util/TheoryPitch";

export class TheoryBasicNote {
  private _xmlID: number;
  private _noteAccounter: number;
  private _measureRecorder: string[];

  public constructor() {
    this._xmlID = 0;
    this._noteAccounter = 0;
    this._measureRecorder = [];
  }

  public generateBasicNote(noteXML_: Element): TheoryINote {
    let note: TheoryINote = {} as TheoryINote;
    note.xmlID = this._xmlID;
    this._xmlID++;
    let stepList = noteXML_.getElementsByTagName("step");
    if (stepList.length) {
      note.step = stepList[0].innerHTML;
      note.rollCall = stepTypeMap[note.step];
    } else {
      note.step = null;
      note.rollCall = null;
    }
    // pitchOctave
    let octaveList = noteXML_.getElementsByTagName("octave");
    octaveList.length ? (note.pitchOctave = parseInt(octaveList[0].innerHTML, 10)) : (note.pitchOctave = null);
    // alter
    let alterList = noteXML_.getElementsByTagName("alter");
    alterList.length ? (note.alter = parseInt(alterList[0].innerHTML, 10)) : (note.alter = 0);
    // chord
    let chordList = noteXML_.getElementsByTagName("chord");
    chordList.length ? (note.isChord = true) : (note.isChord = false);
    // rest
    let restList = noteXML_.getElementsByTagName("rest");
    restList.length ? (note.isRest = true) : (note.isRest = false);
    // dot
    let dotList = noteXML_.getElementsByTagName("dot");
    dotList.length ? (note.isDot = true) : (note.isDot = false);
    // print-object
    noteXML_.getAttribute("print-object") === "no" ? (note.isPrint = false) : (note.isPrint = true);
    // beam
    let beamList = noteXML_.getElementsByTagName("beam");
    beamList.length ? (note.beamSituation = beamList[0].innerHTML) : (note.beamSituation = null);
    // Measure && xmlOrderOfMeasureIndex
    let measureID: string = noteXML_.parentElement!.getAttribute("number") as string;
    if (this._measureRecorder.indexOf(measureID) < 0) {
      this._measureRecorder.push(measureID);
      this._noteAccounter = 0;
    } else {
      this._noteAccounter++;
    }
    note.measureIndex = this._measureRecorder.length - 1;
    note.xmlOrderOfMeasure = this._noteAccounter;
    // staff
    let staffList = noteXML_.getElementsByTagName("staff");
    staffList.length ? (note.staff = parseInt(staffList[0].innerHTML, 10)) : (note.staff = 0);
    // type
    let typeList = noteXML_.getElementsByTagName("type");
    typeList.length ? (note.type = stepTypeMap[typeList[0].innerHTML]) : (note.type = 1);
    // beats
    note.beats = 64 / (note.type as number);
    // tuplet
    if (noteXML_.getElementsByTagName("time-modification").length) {
      let actual = parseInt(noteXML_.getElementsByTagName("actual-notes")[0].innerHTML, 10);
      let normal = parseInt(noteXML_.getElementsByTagName("normal-notes")[0].innerHTML, 10);
      note.actual = actual;
      // 如果是连音, 那么就需要重新算下这个 beats
      note.beats = (note.beats * normal) / actual;
      note.isTuplet = true;
    } else {
      note.actual = null;
      note.isTuplet = false;
    }
    // 存储 dot beats
    if (!note.isDot) {
      note.beatsDot = 0;
    } else {
      let dotAccount = noteXML_.getElementsByTagName("dot").length;
      note.beatsDot = note.beats * (1 - 1 / Math.pow(2, dotAccount));
    }
    // staccato
    note.isStaccato = false;
    // voice
    let voiceList = noteXML_.getElementsByTagName("voice");
    voiceList.length ? (note.voice = parseInt(voiceList[0].innerHTML, 10)) : (note.voice = 0);
    // grace
    let graceList = noteXML_.getElementsByTagName("grace");
    graceList.length ? (note.isGrace = true) : (note.isGrace = false);
    // default-x
    let defaultX = noteXML_.getAttribute("default-x");
    defaultX === null ? (note.defaultX = null) : (note.defaultX = parseFloat(defaultX));
    // stem
    let stemList = noteXML_.getElementsByTagName("stem");
    stemList.length ? (note.stem = stemList[0].innerHTML) : (note.stem = null);
    let accidentalList = noteXML_.getElementsByTagName("accidental");
    accidentalList.length ? (note.accidental = accidentalList[0].innerHTML) : (note.accidental = null);
    // id
    note.id = note.measureIndex * 1000 + note.xmlOrderOfMeasure;
    // 因为休止符为 step 为 null
    // if (note.step !== null && note.pitchOctave !== null) {
    //   note.synthesizeSign = TheoryFormat.convert2NoteSign(note.step, note.pitchOctave, note.accidental);
    // }
    
    // 计算 pitch 值
    if (!note.isRest) {
      note.pitch = TheoryPitch.calculatePitch(note.step!, note.pitchOctave!, note.alter);
    } else {
      note.pitch = 0;
    }
    if (note.pitch !== 0) {
      note.synthesizeSign = synthesizeSign[`P${note.pitch}`];
    }
    return note;
  }
}