/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */

using GLib;

using Gtk;

public class Main : Object

{

	/*

	 * Uncomment this line when you are done testing and building a tarball

	 * or installing

	 */

	//const string UI_FILE = Config.PACKAGE_DATA_DIR + "/" + "guitar_tuner.ui";

	const string UI_FILE = "src/guitar_tuner.ui";

	Gst.Element sink;

	Gst.Element source;

	Gst.Pipeline pipeline;

	[CCode (instance_pos=-1)]

	public void on_button_clicked (Gtk.Button sender) {

		var label = sender.get_child () as Gtk.Label;

		switch (label.get_label()) {

			case "E":

				play_sound (329.63);

				break;

			case "A":

				play_sound (440);

				break;

			case "D":

				play_sound (587.33);

				break;

			case "G":

				play_sound (783.99);

				break;

			case "B":

				play_sound (987.77);

				break;

			case "e":

				play_sound (1318);

				break;

			default:

				break;

		}

	}

	public Main () {

		try

		{

			var builder = new Builder ();

			builder.add_from_file (UI_FILE);

			builder.connect_signals (this);

			var window = builder.get_object ("window") as Window;

			window.show_all ();

		}

		catch (Error e) {

			stderr.printf ("Could not load UI: %s\n", e.message);

		}

	}

	[CCode (instance_pos = -1)]

	public void on_destroy (Window window) {

		Gtk.main_quit();

	}

	private void play_sound(double frequency) {

		pipeline = new Gst.Pipeline ("note");

		source   = Gst.ElementFactory.make ("audiotestsrc",

		                                     "source");

		sink     = Gst.ElementFactory.make ("autoaudiosink",

		                                     "output");

		/* set frequency */

		source.set ("freq", frequency);

		pipeline.add (source);

		pipeline.add (sink);

		source.link (sink);

		pipeline.set_state (Gst.State.PLAYING);

		/* stop it after 200ms */

	    var time = new TimeoutSource(200);

		time.set_callback(() => {

			pipeline.set_state (Gst.State.NULL);

		    return false;

		});

		time.attach(null);

	}

	static int main (string[] args) {

		Gst.init (ref args);

		Gtk.init (ref args);

		var app = new Main ();

		Gtk.main ();

		return 0;

	}

}