class FetchMusic {
  get resources() {
    return [
      { id: 1, title: "The Fragile" },
      { id: 2, title: "Alladin Sane" },
      { id: 3, title: "OK Computer" }
    ];
  }

  fetch(id) {
    return this.resources.find(item => item.id === id);
  }
}

class GetMovie {
  constructor(id) {
    return this.resources.find(item => item.id === id);
  }

  get resources() {
    return [
      { id: 1, title: "Apocalypse Now" },
      { id: 2, title: "Die Hard" },
      { id: 3, title: "Big Lebowski" }
    ];
  }
}

const getTvShow = function(id) {
  const resources = [
    { id: 1, title: "Twin Peaks" },
    { id: 2, title: "Luther" },
    { id: 3, title: "The Simpsons" }
  ];

  return resources.find(item => item.id === 1);
};

const booksResource = [
  { id: 1, title: "Ulysses" },
  { id: 2, title: "Ham on Rye" },
  { id: 3, title: "Quicksilver" }
];

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */

const TYPE_MUSIC = "music";
const TYPE_MOVIE = "movie";
const TYPE_TV = "tv";
const TYPE_BOOK = "book";

class CultureFacade {
  constructor(type) {
    this.type = type;
  }

  get(id) {
    switch (this.type) {
      case TYPE_MUSIC: {
        return this._tryToReturn(this._findMusic, id);
      }

      case TYPE_MOVIE: {
        return this._tryToReturn(this._findMovie, id);
      }

      case TYPE_TV: {
        return this._tryToReturn(this._findTVShow, id);
      }

      case TYPE_BOOK: {
        return this._tryToReturn(this._findBook, id);
      }

      default: {
        throw new Error("No type set!");
      }
    }
  }

  get _error() {
    return { status: 404, error: `No item with this id found` };
  }

  _tryToReturn(func, id) {
    const result = func.call(this, id);
    
    return new Promise((ok, err) => !!result
      ? ok(result)
      : err(this._error));
  }

  _findMusic(id) {
    const db = new FetchMusic();
    return db.fetch(id);
  }

  _findMovie(id) {
    return new GetMovie(id);
  }

  _findTVShow(id) {
    return getTvShow(id);
  }

  _findBook(id) {
    return booksResource.find(item => item.id === id);
  }
}

const m = new FetchMusic();

const music = new CultureFacade(TYPE_MUSIC);
music.get(5)
  .then(data => console.log(data))
  .catch(e => console.error(e));