import EtudeError from "../error/EtudeError";
import Value from "./Value";

export default class Tempo {
  /*
   * Values based on the mean of the values given in
   * https://en.wikipedia.org/wiki/Tempo
   */
  public static LARGHISSIMO = new Tempo(24, "Larghissimo");
  public static GRAVE = new Tempo(35, "Grave");
  public static LARGO = new Tempo(50, "Largo");
  public static LENTO = new Tempo(53, "Lento");
  public static LARGHETTO = new Tempo(63, "Larghetto");
  public static ADAGIO = new Tempo(71, "Adagio");
  public static ADAGIETTO = new Tempo(74, "Adagietto");
  public static ANDANTE = new Tempo(92, "Andante");
  public static ANDANTINO = new Tempo(94, "Andantino");
  public static MARCIA_MODERATO = new Tempo(84, "Marcia Moderato");
  public static ANDANTE_MODERATO = new Tempo(102, "Andante Moderato");
  public static MODERATO = new Tempo(114, "Moderato");
  public static ALLEGRETTO = new Tempo(116, "Allegretto");
  public static ALLEGRO_MODERATO = new Tempo(118, "Allegro Moderato");
  public static ALLEGRO = new Tempo(144, "Allegro");
  public static VIVACE = new Tempo(172, "Vivace");
  public static VIVACISSIMO = new Tempo(174, "Vivacissimo");
  public static ALLEGRISSIMO = new Tempo(174, "Allegrissimo");
  public static ALLEGRO_VIVACE = new Tempo(174, "Allegro Vivace");
  public static PRESTO = new Tempo(184, "Presto");
  public static PRESTISSIMO = new Tempo(200, "Prestissimo");

  private beatValue: Value;
  private tempoMarking: string;

  constructor(private bpm: number, parameterA: Value | string = Value.QUARTER, parameterB: string = (`[${parameterA}] = ${bpm}`)) {
    if (parameterA instanceof Value) {
      this.beatValue = parameterA as Value;
      this.tempoMarking = parameterB;
    }
    else if (typeof parameterA === "string") {
      if (arguments.length !== 2) {
        throw EtudeError.forIllegalArgument(Tempo, parameterA, "Invalid number of arguments");
      }
      this.beatValue = Value.QUARTER;
      this.tempoMarking = parameterA as string;
    }
  }

  public getBPM(): number {
    return this.bpm;
  }

  public getBeatValue(): Value {
    return this.beatValue;
  }

  public getTempoMarking(): string {
    return this.tempoMarking;
  }
}