class MPD < Widget
  description "MPD Information"
  dependency "socket", "Ruby standard library"
  dependency "yaml", "Ruby standard library"
  option :hostname, "MPD server hostname", "localhost"
  option :port, "MPD server port number", 6600
  option :password, "Authentication password"
  field :state, "Play state, :playing, :paused or :stopped"
  field :artist, "Song artist"
  field :title, "Song title"
  field :length, "Song length"
  field :position, "Song position"
  field :date, "Song date from ID3 tag"
  field :id, "Song ID in playlist"
  field :genre, "Song genre"
  field :album, "Song album"
  field :file, "File name of current song"
  field :shortfile, "Filename without directory path"
  field :percent, "Finished percent of current song", 0.0
  field :random, "True if playlist is on random", false
  field :repeat, "True if playlist is on repeat", false
  field :volume, "Volume of MPD mixer", 0

  default do
    track = "#{@artist && "#@artist - "}#@title"
    track = @shortfile if track.empty?
    case @state
    when :playing
      track
    when :paused
      "#{track} [paused]"
    when :stopped
      "[mpd not playing]"
    end
  end

  init do
    @@connections ||= {}
    mpd = nil
    unless @@connections["#@hostname:#@port"]
      @@connections["#@hostname:#@port"] = TCPSocket.new(@hostname, @port)
      mpd = @@connections["#@hostname:#@port"]
      mpd.gets
    else
      mpd = @@connections["#@hostname:#@port"]
      mpd.puts("ping")
      unless mpd.gets
        @@connections["#@hostname:#@port"] = TCPSocket.new(@hostname, @port)
        mpd = @@connections["#@hostname:#@port"]
        mpd.gets
      end
    end
    if @password
      mpd.puts("password #@password")
      if mpd.gets.split[0] == "ACK"
        raise WidgetError, "incorrect password"
      end
    end
    mpd.puts("status")
    status = YAML.load(mpd.gets("OK\n").chomp("OK\n"))
    @state = {:play => :playing, :pause => :paused, :stop => :stopped}[status["state"].to_sym]
    @random = status["random"] == 1 ? true : false
    @repeat = status["repeat"] == 1 ? true : false
    @volume = status["volume"]
    mpd.puts("currentsong")
    if song = YAML.load(mpd.gets("OK\n").chomp("OK\n"))
      @artist = song["Artist"]
      @title = song["Title"]
      len = song["Time"]
      minutes = (len / 60) % 60
      seconds = len % 60
      @length = "%d:%02d" % [minutes, seconds]
      pos = status["time"].to_i
      minutes = (pos / 60) % 60
      seconds = pos % 60
      @position = "%d:%02d" % [minutes, seconds]
      @date = song["Date"]
      @id = song["Id"]
      @genre = song["Genre"]
      @album = song["Album"]
      @file = song["file"]
      @shortfile = ::File.basename(@file)
      @percent = pos / len.to_f
    end
  end
end