/*
This service primarily controls PulseAudio and is driven by the sound indicator menu on the panel.
Copyright 2010 Canonical Ltd.

Authors:
    Conor Curran <conor.curran@canonical.com>

This program is free software: you can redistribute it and/or modify it 
under the terms of the GNU General Public License version 3, as published 
by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but 
WITHOUT ANY WARRANTY; without even the implied warranties of 
MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR 
PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along 
with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

using Gee;

public class MprisController : GLib.Object
{
	private DBus.Connection connection;
	public dynamic DBus.Object mpris_player{get; construct;}	
	public PlayerController owner {get; construct;}	
	public string mpris_interface {get; construct;}
	private string name;

	
	struct status {
    public int32 playback;
    //public int32 shuffle; // Not used just yet
    //public int32 repeat;
    //public int32 endless;
  }
		
	public MprisController(PlayerController ctrl, string inter="org.freedesktop.MediaPlayer"){
		Object(owner: ctrl, mpris_interface: inter);		
	}

	construct{
    try {
      this.connection = DBus.Bus.get (DBus.BusType.SESSION);
    } catch (Error e) {
      error("Problems connecting to the session bus - %s", e.message);
    }		
		this.mpris_player = this.connection.get_object ("org.mpris.".concat(this.owner.name.down()) , "/Player", this.mpris_interface);				

		debug("just attempting to establish an mpris connection to %s, %s, %s", "org.mpris.".concat(this.owner.name.down()) , "/Player", this.mpris_interface); 

		this.mpris_player.TrackChange += onTrackChange;	
    this.mpris_player.StatusChange += onStatusChange;	

		status st = this.mpris_player.GetStatus();
		int play_state =  st.playback;
		debug("GetStatusChange - play state %i", play_state);
		(this.owner.custom_items[PlayerController.widget_order.TRANSPORT] as TransportMenuitem).change_play_state(play_state);
		this.owner.custom_items[PlayerController.widget_order.METADATA].update(this.mpris_player.GetMetadata(),
		                            MetadataMenuitem.attributes_format());
		
	}


	private void onTrackChange(dynamic DBus.Object mpris_client, HashTable<string,Value?> ht)
	{
		debug("onTrackChange");
		this.owner.custom_items[PlayerController.widget_order.METADATA].reset(MetadataMenuitem.attributes_format());
		this.owner.custom_items[PlayerController.widget_order.METADATA].update(ht,
		                            MetadataMenuitem.attributes_format());
	}

	public void transport_event(TransportMenuitem.action command)
	{
		debug("transport_event input = %i", (int)command);
		if(command == TransportMenuitem.action.PLAY_PAUSE){
			status st = this.mpris_player.GetStatus();
			bool play_state =  st.playback == 1;
			debug("toggle_playback - initial play state %i", (int)play_state);
			bool new_play_state = !play_state;
			debug("toggle_playback - new play state %i", (int)new_play_state);
			if(new_play_state == true){
				debug("about to play");
				this.mpris_player.Play();				
			}
			else{
				debug("about to pause");
				this.mpris_player.Pause();						
			}
		}
		else if(command == TransportMenuitem.action.PREVIOUS){
			this.mpris_player.Prev();
		}
		else if(command == TransportMenuitem.action.NEXT){
			this.mpris_player.Next();
		}
	}

	public void set_position(double position)
	{
		debug("Set position with pos (0-100) %f", position);
		HashTable<string, Value?> data = this.mpris_player.GetMetadata();
		Value? time_value = data.lookup("time");
		if(time_value == null){
			warning("Can't fetch the duration of the track therefore cant set the position");
			return;
		}
		uint32 total_time = time_value.get_uint32();
		debug("total time of track = %i", (int)total_time);		
		double new_time_position = total_time * position/100.0;
		this.mpris_player.SetPosition((int)(new_time_position * 1000));
	}
	
	public bool connected()
	{
		return (this.mpris_player != null);
	}
	
	private void onStatusChange(dynamic DBus.Object mpris_client, status st)
  {
    debug("onStatusChange - signal received");	
		status* status = &st;
		unowned ValueArray ar = (ValueArray)status;		
		int play_state = ar.get_nth(0).get_int();
		debug("onStatusChange - play state %i", play_state);
		HashTable<string, Value?> ht = new HashTable<string, Value?>(str_hash, str_equal);
		Value v = Value(typeof(int));
		v.set_int(play_state);
		ht.insert("state", v); 
		this.owner.custom_items[PlayerController.widget_order.TRANSPORT].update(ht, TransportMenuitem.attributes_format());
	}

	
}