namespace LAview.Desktop {

	using Gtk;

	/**
	 * Subprocess window.
	 */
	public class SubprocessDialog {
		Dialog dialog;
		TextView textview_stderrout;
		Subprocess sp;
		unowned PostProcessDelegate ppdelegate;

		public delegate void PostProcessDelegate ();

		public SubprocessDialog (Window parent) throws Error {
			var builder = new Builder ();
			builder.add_from_file (AppDirs.ui_dir + "/laview-desktop.glade");
			builder.connect_signals (this);

			dialog = builder.get_object ("subprocess_dialog") as Dialog;
			dialog.set_transient_for (parent);
			dialog.set_modal (true);
			dialog.delete_event.connect ((source) => {return true;});
			textview_stderrout = builder.get_object ("textview_stderrout") as TextView;
		}

		async void subprocess_async () {
			try {
				var ds_out = new DataInputStream(sp.get_stdout_pipe());
				try {
					for (string s = yield ds_out.read_line_async(); s != null; s = yield ds_out.read_line_async())
						textview_stderrout.buffer.text += s + "\n";
				} catch (IOError err) {
					assert_not_reached();
				}
				if ((sp.wait_check()) == false) throw new IOError.FAILED("Error running subprocess.");
				ppdelegate ();
				dialog.hide ();

			} catch (Error err) {
				textview_stderrout.buffer.text += @"Error: $(err.message)";
				if (sp != null) {
					var ds_err = new DataInputStream(sp.get_stderr_pipe());
					try {
						for (string s = yield ds_err.read_line_async(); s != null; s = yield ds_err.read_line_async())
							textview_stderrout.buffer.text += s + "\n";
					} catch (IOError err) {
						assert_not_reached();
					}
				}
			}
		}

		public void show_all (Subprocess sp, string message, PostProcessDelegate ppdelegate) {
			this.sp = sp;
			textview_stderrout.buffer.text = message;
			this.ppdelegate = ppdelegate;
			dialog.show_all ();
			subprocess_async.begin ();
		}

		[CCode (instance_pos = -1)]
		public void button_stop_clicked (Button button) {
			sp.force_exit ();
			dialog.hide ();
		}
	}
}