//
// OpenVPN Administrator
//
// Author(s): Everaldo Canuto <everaldo@simios.org>
//
// (C) 2006 Everaldo Canuto <everaldo@simios.org>
// (C) 2006 The Gang <www.the-gang.net>
// 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

using System;
using System.Reflection;
using Mono.Unix;
using Gtk;
using Glade;

namespace OpenVPN.Admin
{
	public class KeysForm
	{
		#region Fields
		
		[Widget] Dialog keysForm;
		[Widget] Image imageLogo;
		//[Widget] Button buttonAdd;
		[Widget] Button buttonDelete;
		[Widget] Button buttonPassphrase;
		[Widget] Button buttonClear;
		[Widget] TreeView listView;
		
		[Widget] Gtk.Table tableCert;
		[Widget] Gtk.Entry entryName;
		[Widget] Gtk.Entry entryMail;
		[Widget] Gtk.Entry entryCity;
		[Widget] Gtk.Entry entryState;
		[Widget] Gtk.Entry entryCountry;
		[Widget] Gtk.Entry entryOrganization;
		[Widget] Gtk.Entry entryOrganizationUnit;
		[Widget] Gtk.Entry entryExpiration;
		[Widget] Gtk.Entry entrySerial;
		
		private ListStore listStore;
		private string selectedKey;

		#endregion
	
		#region Constructors and destructors
		
		public KeysForm() 
		{
			InitializeComponent();
			RefreshEntries();
		}
        
		private void InitializeComponent()
		{
			// keysForm			
			Glade.XML gxml = new Glade.XML (null, "openvpn-admin.glade", "keysForm", null);
			gxml.Autoconnect (this);
			keysForm.Icon    = Gdk.Pixbuf.LoadFromResource("openvpn-admin.png");
			imageLogo.Pixbuf = Gdk.Pixbuf.LoadFromResource("certificate.png");

			// listStore
			listStore = new ListStore (typeof (string));

			// columnKeys
			listView.AppendColumn("Keys", new CellRendererText(), "text", 0);;

			// listView
			listView.Model = listStore;
			listView.EnableSearch = true;
			listView.Selection.Changed += new EventHandler(on_listView_selection_change);
		}
                
		#endregion

		#region Private methods
		
		public ResponseType QuestionBox(string message)
		{
			MessageDialog md = new MessageDialog(this.keysForm, 
									DialogFlags.DestroyWithParent,
									MessageType.Question, 
									ButtonsType.YesNo, 
									message);
     
			ResponseType result = (ResponseType) md.Run();
			md.Destroy();
			return result;
		}
		
		public void MsgBox(string message)
		{
			MessageDialog md = new MessageDialog(this.keysForm, 
									DialogFlags.DestroyWithParent,
									MessageType.Info, 
									ButtonsType.Ok, 
									message);
     
			md.Run();
			md.Destroy();
		}

		public void ErrorBox(string message)
		{
			MessageDialog md = new MessageDialog(this.keysForm, 
									DialogFlags.DestroyWithParent,
									MessageType.Error, 
									ButtonsType.Ok, 
									message);
     
			md.Run();
			md.Destroy();
		}

		#endregion
		  
		#region Public methods
		
		public Gtk.ResponseType ShowModal()
		{
			return (Gtk.ResponseType) this.keysForm.Run();
		}
		
		public void RefreshEntries()
		{
			this.listStore.Clear();
			foreach (string key in Configuration.Keys)
			{
				this.listStore.AppendValues(key);	
			}
			
			listView.Selection.SelectPath(new TreePath("0"));
		}

		
		#endregion

		#region Private events

		protected void on_close_clicked(object o, EventArgs args) 
		{
			keysForm.Hide();
		}

		protected void on_add_clicked(object o, EventArgs args)
		{
				FileChooserDialog dialog = new FileChooserDialog(Catalog.GetString("Select Key File"), keysForm, FileChooserAction.Open);
			
				dialog.AddButton (Stock.Cancel, ResponseType.Cancel);
				dialog.AddButton (Stock.Open, ResponseType.Ok);
				if (dialog.Run() == (int) ResponseType.Ok)
				{
					Configuration.AddKey(dialog.Filename);
					this.RefreshEntries();
				}	
				dialog.Hide();
		
		}
		
		protected void on_delete_clicked(object o, EventArgs args) 
		{
        	if (QuestionBox(Catalog.GetString("Are you sure you want to delete this key?")) == ResponseType.Yes)
        	{ 
        		try
        		{
					Configuration.DeleteKey(this.selectedKey);
					this.RefreshEntries();
				} 
				catch (Exception e)
				{
					ErrorBox(e.Message);
				}
			}
		}

		protected void on_passphrase_clicked(object o, EventArgs args) 
		{
        	ChangeForm form = new ChangeForm();
        	if (form.ShowModal() == Gtk.ResponseType.Ok)
        	{
        		try
        		{
					Configuration.ChangeKey(this.selectedKey, form.Password, form.NewPassword);
				} 
				catch (Exception e)
				{
					ErrorBox(e.Message);
				}
        	}
		}
		
		protected void on_clear_clicked(object o, EventArgs args) 
		{
        	PassForm form = new PassForm(false);
        	if (form.Show() == Gtk.ResponseType.Ok)
        	{
        		try
        		{
					Configuration.ClearKey(this.selectedKey, form.Password);
				} 
				catch (Exception e)
				{
					ErrorBox(e.Message);
				}
        	}
		}
		
		protected void on_listView_selection_change(object o, EventArgs args) 
        {
        	try
        	{
				TreeModel model; TreeIter iter;
				this.listView.Selection.GetSelected(out model, out iter);
        		this.selectedKey = (string) listView.Model.GetValue(iter, 0);
        
				this.buttonDelete.Sensitive     = true;
				this.buttonPassphrase.Sensitive = true;
				this.buttonClear.Sensitive      = true;
				
				RefreshPanel();
			}
			catch {}
        }
        
        private void RefreshPanel()
        {
			CertificationInfo cert = Configuration.CertificateInfo(this.selectedKey);

			tableCert.Visible = ! cert.Empty;
			
        	entryName.Text             = cert.Name;
			entryMail.Text             = cert.Mail;
			entryCity.Text             = cert.City;
			entryState.Text            = cert.State;
			entryCountry.Text          = cert.Country;
			entryOrganization.Text     = cert.Organization;
			entryOrganizationUnit.Text = cert.OrganizationUnit;
			entryExpiration.Text       = cert.Expiration;
			entrySerial.Text           = cert.Serial;
        }

		#endregion        
	}
	
}