class ArtistController < ApplicationController
  def data
    # Bad params
    if params[:artist].nil? or params[:artist].empty?
      return render json: { status: 'loading_failed' }, status: 404
    end
    
    # Searching for artist
    artist_name = get_artist_name_from_query
    @artist = Artist.find_by_name(artist_name)
    
    # Artist not found in DB
    unless @artist
      results = MusicBrainz::Artist.search(artist_name)
      if results.empty?
        return render json: { status: 'not_found' }
      end
      best_match = results[0][:sort_name]
      if best_match != artist_name and similar_names(artist_name, best_match)
        return render json: { status: 'corrected', correct_name: best_match }
      elsif best_match == artist_name
        queue_loading(artist_name, results[0][:mbid])
      else
        @suggestions = results.take(5)
        return render json: { status: 'suggestions', html: render_compact_partial(:suggestions) }
      end
    end
    
    compile_page(
      data: @artist,
      partial: "artist/page",
      title: @artist.name,
      status: @artist.status_str,
      callback: {object: :player, action: :updateLibrary},
      cache_for: (1.day if @artist.status_str == "ok")
    )
  end
  
  def search
    redirect_to "/#/artist/#{params[:q].gsub(/\s/, '+')}"
  end
  
private
  
  def queue_loading artist_name, mbid
    @artist = Artist.create( name: artist_name, mbid: mbid, status: 0 )
    Delayed::Job.enqueue(LoadArtistJob.new(artist_name))
  end
  
  def similar_names name1, name2
    (name2.downcase == name1.downcase or name2.downcase == 'the '+ name1.downcase)
  end
end