/*
This file is part of Keepass2Android, Copyright 2013 Philipp Crocoll. This file is based on Keepassdroid, Copyright Brian Pellin.

  Keepass2Android is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.

  Keepass2Android 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with Keepass2Android.  If not, see <http://www.gnu.org/licenses/>.
  */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.Preferences;
using KeePassLib.Utility;
using KeePassLib;
using Android.Text;
using KeePassLib.Security;
using Android.Content.PM;
using keepass2android.view;
using System.IO;
using System.Globalization;

namespace keepass2android
{
	[Activity (Label = "@string/app_name", ConfigurationChanges=ConfigChanges.Orientation|ConfigChanges.KeyboardHidden, Theme="@style/NoTitleBar")]			
	public class EntryEditActivity : LockCloseActivity {
		public const String KEY_ENTRY = "entry";
		public const String KEY_PARENT = "parent";
		
		public const int RESULT_OK_ICON_PICKER = (int)Result.FirstUser + 1000;
		public const int RESULT_OK_PASSWORD_GENERATOR = RESULT_OK_ICON_PICKER + 1;
		
		private PwEntry mEntry, mEntryInDatabase;
		private bool mShowPassword = false;
		private bool mIsNew;
		private PwIcon mSelectedIconID;
		private PwUuid mSelectedCustomIconID = PwUuid.Zero;
		private bool mSelectedIcon = false;
		
		public static void Launch(Activity act, PwEntry pw) {
			Intent i = new Intent(act, typeof(EntryEditActivity));
			
			i.PutExtra(KEY_ENTRY, pw.Uuid.ToHexString());
			
			act.StartActivityForResult(i, 0);
		}
		
		public static void Launch(Activity act, PwGroup pw) {
			Intent i = new Intent(act, typeof(EntryEditActivity));
			
			PwGroup parent = pw;
			i.PutExtra(KEY_PARENT, parent.Uuid.ToHexString());
			
			act.StartActivityForResult(i, 0);
		}

		private ScrollView scroll;
		
		protected override void OnCreate(Bundle savedInstanceState) 
		{
			ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences(this);
			mShowPassword = ! prefs.GetBoolean(GetString(Resource.String.maskpass_key), Resources.GetBoolean(Resource.Boolean.maskpass_default));
			
			base.OnCreate(savedInstanceState);
			SetContentView(Resource.Layout.entry_edit);
			SetResult(KeePass.EXIT_NORMAL);
			
			// Likely the app has been killed exit the activity
			Database db = App.getDB();
			if ( ! db.Open ) {
				Finish();
				return;
			}
			
			Intent i = Intent;
			String uuidBytes =  i.GetStringExtra(KEY_ENTRY);

			PwUuid entryId = PwUuid.Zero;
			if (uuidBytes != null)
				entryId = new KeePassLib.PwUuid(MemUtil.HexStringToByteArray(uuidBytes));

			PwGroup parentGroup = null;
			if ( entryId == PwUuid.Zero ) {
				String groupId = i.GetStringExtra(KEY_PARENT);

				parentGroup = db.groups[new PwUuid(MemUtil.HexStringToByteArray(groupId))];

				mEntryInDatabase = new PwEntry(true, true);
				mEntryInDatabase.Strings.Set(PwDefs.UserNameField, new ProtectedString(
					db.pm.MemoryProtection.ProtectUserName, db.pm.DefaultUserName));

				/*KPDesktop
				 * ProtectedString psAutoGen;
			PwGenerator.Generate(out psAutoGen, Program.Config.PasswordGenerator.AutoGeneratedPasswordsProfile,
				null, Program.PwGeneratorPool);
			psAutoGen = psAutoGen.WithProtection(pwDb.MemoryProtection.ProtectPassword);
			pwe.Strings.Set(PwDefs.PasswordField, psAutoGen);

			int nExpireDays = Program.Config.Defaults.NewEntryExpiresInDays;
			if(nExpireDays >= 0)
			{
				pwe.Expires = true;
				pwe.ExpiryTime = DateTime.Now.AddDays(nExpireDays);
			}*/

				if((parentGroup.IconId != PwIcon.Folder) && (parentGroup.IconId != PwIcon.FolderOpen) &&
				   (parentGroup.IconId != PwIcon.FolderPackage))
				{
					mEntryInDatabase.IconId = parentGroup.IconId; // Inherit icon from group
				}
				mEntryInDatabase.CustomIconUuid = parentGroup.CustomIconUuid;

				/*
				 * KPDesktop
			if(strDefaultSeq.Length == 0)
			{
				PwGroup pg = m_pwEntry.ParentGroup;
				if(pg != null)
				{
					strDefaultSeq = pg.GetAutoTypeSequenceInherited();

					if(strDefaultSeq.Length == 0)
					{
						if(PwDefs.IsTanEntry(m_pwEntry))
							strDefaultSeq = PwDefs.DefaultAutoTypeSequenceTan;
						else
							strDefaultSeq = PwDefs.DefaultAutoTypeSequence;
					}
				}
			}*/
				mIsNew = true;

			} else {

				System.Diagnostics.Debug.Assert(entryId != null);
				
				mEntryInDatabase =  db.entries[entryId];
				mIsNew = false;
				

			} 

			mEntry = mEntryInDatabase.CloneDeep();

			fillData();
			View scrollView = FindViewById(Resource.Id.entry_scroll);
			scrollView.ScrollBarStyle = ScrollbarStyles.InsideInset;
			
			ImageButton iconButton = (ImageButton) FindViewById(Resource.Id.icon_button);
			iconButton.Click += (sender, evt) => {
				IconPickerActivity.Launch(this);
			};
		

			// Generate password button
			Button generatePassword = (Button) FindViewById(Resource.Id.generate_button);
			generatePassword.Click += (object sender, EventArgs e) => {

				GeneratePasswordActivity.Launch(this);
			};




			// Save button
			Button save = (Button) FindViewById(Resource.Id.entry_save);
			save.Click += (object sender, EventArgs e) => 
			{
				
				EntryEditActivity act = this;
				
				if (!validateBeforeSaving())
					return;

				PwEntry initialEntry = mEntryInDatabase.CloneDeep();

				PwEntry newEntry = mEntryInDatabase;

				//Clone history and re-assign:
				newEntry.History = newEntry.History.CloneDeep();

				//Based on KeePass Desktop
				bool bCreateBackup = (!mIsNew);
				if(bCreateBackup) newEntry.CreateBackup(null);

				if (mSelectedIcon == false) {
					if (mIsNew) {
						newEntry.IconId = PwIcon.Key;
					} else {
						// Keep previous icon, if no new one was selected
					}
				}
				else {
					newEntry.IconId = mSelectedIconID;
					newEntry.CustomIconUuid = mSelectedCustomIconID;
				}
				/* KPDesktop
				if(m_cbCustomForegroundColor.Checked)
					newEntry.ForegroundColor = m_clrForeground;
				else newEntry.ForegroundColor = Color.Empty;
				if(m_cbCustomBackgroundColor.Checked)
					newEntry.BackgroundColor = m_clrBackground;
				else newEntry.BackgroundColor = Color.Empty;
				
				*/


				newEntry.Strings.Set(PwDefs.TitleField, new ProtectedString(db.pm.MemoryProtection.ProtectTitle,
				                                                            Util.getEditText(act, Resource.Id.entry_title)));
				newEntry.Strings.Set(PwDefs.UserNameField, new ProtectedString(db.pm.MemoryProtection.ProtectUserName,
				                                                               Util.getEditText(act, Resource.Id.entry_user_name)));

				String pass = Util.getEditText(act, Resource.Id.entry_password);
				byte[] password = StrUtil.Utf8.GetBytes(pass);
				newEntry.Strings.Set(PwDefs.PasswordField, new ProtectedString(db.pm.MemoryProtection.ProtectPassword,
				                                                         password));
				MemUtil.ZeroByteArray(password);
				
				newEntry.Strings.Set(PwDefs.UrlField, new ProtectedString(db.pm.MemoryProtection.ProtectUrl,
				                                                          Util.getEditText(act, Resource.Id.entry_url)));
				newEntry.Strings.Set(PwDefs.NotesField, new ProtectedString(db.pm.MemoryProtection.ProtectNotes,
				                                                            Util.getEditText(act, Resource.Id.entry_comment)));

				// Delete all non standard strings
				var keys = newEntry.Strings.GetKeys();
				foreach (String key in keys)
					if (PwDefs.IsStandardField(key) == false)
						newEntry.Strings.Remove(key);
				
				LinearLayout container = (LinearLayout) FindViewById(Resource.Id.advanced_container);

				for (int index = 0; index < container.ChildCount; index++) {
					View view = container.GetChildAt(index);
					
					TextView keyView = (TextView)view.FindViewById(Resource.Id.title);
					String key = keyView.Text;
					
					TextView valueView = (TextView)view.FindViewById(Resource.Id.value);
					String value = valueView.Text;
					
					CheckBox cb = (CheckBox)view.FindViewById(Resource.Id.protection);
					bool protect = cb.Checked;
					
					newEntry.Strings.Set(key, new ProtectedString(protect, value));
				}

				newEntry.Binaries = mEntry.Binaries;
				newEntry.Expires = mEntry.Expires;
				if (newEntry.Expires)
				{
					newEntry.ExpiryTime = mEntry.ExpiryTime;
				}

				newEntry.OverrideUrl = Util.getEditText(this,Resource.Id.entry_override_url);

				List<string> vNewTags = StrUtil.StringToTags(Util.getEditText(this,Resource.Id.entry_tags));
				newEntry.Tags.Clear();
				foreach(string strTag in vNewTags) newEntry.AddTag(strTag);

				/*KPDesktop


				m_atConfig.Enabled = m_cbAutoTypeEnabled.Checked;
				m_atConfig.ObfuscationOptions = (m_cbAutoTypeObfuscation.Checked ?
				                                 AutoTypeObfuscationOptions.UseClipboard :
				                                 AutoTypeObfuscationOptions.None);

				SaveDefaultSeq();
				
				newEntry.AutoType = m_atConfig;
				*/


				newEntry.Touch(true, false); // Touch *after* backup
				
				StrUtil.NormalizeNewLines(newEntry.Strings, true);
				
				bool bUndoBackup = false;
				PwCompareOptions cmpOpt =  (PwCompareOptions.NullEmptyEquivStd |
				                            PwCompareOptions.IgnoreTimes);
				if(bCreateBackup) cmpOpt |= PwCompareOptions.IgnoreLastBackup;
				if(newEntry.EqualsEntry(initialEntry, cmpOpt, MemProtCmpMode.CustomOnly))
				{
					// No modifications at all => restore last mod time and undo backup
					newEntry.LastModificationTime = initialEntry.LastModificationTime;
					bUndoBackup = bCreateBackup;
				}
				else if(bCreateBackup)
				{
					// If only history items have been modified (deleted) => undo
					// backup, but without restoring the last mod time
					PwCompareOptions cmpOptNH = (cmpOpt | PwCompareOptions.IgnoreHistory);
					if(newEntry.EqualsEntry(initialEntry, cmpOptNH, MemProtCmpMode.CustomOnly))
						bUndoBackup = true;
				}
				if(bUndoBackup) newEntry.History.RemoveAt(newEntry.History.UCount - 1);
				
				newEntry.MaintainBackups(db.pm);



				//if ( newEntry.Strings.ReadSafe (PwDefs.TitleField).Equals(mEntry.Strings.ReadSafe (PwDefs.TitleField)) ) {
				//	SetResult(KeePass.EXIT_REFRESH);
				//} else {
				//it's safer to always update the title as we might add further information in the title like expiry etc.
				SetResult(KeePass.EXIT_REFRESH_TITLE);
				//}
				
				RunnableOnFinish task;
				OnFinish onFinish = new AfterSave(new Handler(), act);
				
				if ( mIsNew ) {
					task = AddEntry.getInstance(this, App.getDB(), newEntry, parentGroup, onFinish);
				} else {
					task = new UpdateEntry(this, App.getDB(), initialEntry, newEntry, onFinish);
				}
				ProgressTask pt = new ProgressTask(act, task, Resource.String.saving_database);
				pt.run();
			};
			
		
			// Respect mask password setting
			if (mShowPassword) {
				EditText pass = (EditText) FindViewById(Resource.Id.entry_password);
				EditText conf = (EditText) FindViewById(Resource.Id.entry_confpassword);
				
				pass.InputType = InputTypes.ClassText | InputTypes.TextVariationVisiblePassword;
				conf.InputType = InputTypes.ClassText | InputTypes.TextVariationVisiblePassword;
			}

			scroll = (ScrollView) FindViewById(Resource.Id.entry_scroll);
			
			Button addButton = (Button) FindViewById(Resource.Id.add_advanced);
			addButton.Visibility = ViewStates.Visible;
			addButton.Click += (object sender, EventArgs e) =>
			{
				LinearLayout container = (LinearLayout) FindViewById(Resource.Id.advanced_container);
				
				EntryEditSection ees = (EntryEditSection) LayoutInflater.Inflate(Resource.Layout.entry_edit_section, null);
				ees.setData("", new ProtectedString(false, ""));
				ees.getDeleteButton().Click += (senderEes, eEes) => deleteAdvancedString((View)senderEes);
				container.AddView(ees);
				
				// Scroll bottom
				scroll.Post(() => {
						scroll.FullScroll(FocusSearchDirection.Down);
				});

					
			};
		
			((CheckBox)FindViewById(Resource.Id.entry_expires_checkbox)).CheckedChange += (object sender, CompoundButton.CheckedChangeEventArgs e) => 
			{
				mEntry.Expires = e.IsChecked;
				if (e.IsChecked)
				{
					if (mEntry.ExpiryTime < DateTime.Now)
						mEntry.ExpiryTime = DateTime.Now;
				}
				updateExpires();
				
			};
			
		}

		void addBinaryOrAsk(string filename)
		{
			string strItem = UrlUtil.GetFileName(filename);

			if(mEntry.Binaries.Get(strItem) != null)
			{
				AlertDialog.Builder builder = new AlertDialog.Builder(this);
				builder.SetTitle(GetString(Resource.String.AskOverwriteBinary_title));

				builder.SetMessage(GetString(Resource.String.AskOverwriteBinary));

				builder.SetPositiveButton(GetString(Resource.String.AskOverwriteBinary_yes), new EventHandler<DialogClickEventArgs>((dlgSender, dlgEvt) => 
				                                                                                                         {
					addBinary(filename, true);
				}));

				builder.SetNegativeButton(GetString(Resource.String.AskOverwriteBinary_no), new EventHandler<DialogClickEventArgs>((dlgSender, dlgEvt) => 
				                                                                                                         {
					addBinary(filename, false);
				}));

				builder.SetNeutralButton(GetString(Android.Resource.String.Cancel), 
				                         new EventHandler<DialogClickEventArgs>((dlgSender, dlgEvt) => {}));

				Dialog dialog = builder.Create();
				dialog.Show();


			} else
				addBinary(filename, true);
		}

		void addBinary(string filename, bool overwrite)
		{
			string strItem = UrlUtil.GetFileName(filename);

			if (!overwrite)
			{
				string strFileName = UrlUtil.StripExtension(strItem);
				string strExtension = "." + UrlUtil.GetExtension(strItem);
				
				int nTry = 0;
				while(true)
				{
					string strNewName = strFileName + nTry.ToString() + strExtension;
					if(mEntry.Binaries.Get(strNewName) == null)
					{
						strItem = strNewName;
						break;
					}
					
					++nTry;
				}
			}
			try
			{
				byte[] vBytes = File.ReadAllBytes(filename);
				if(vBytes != null)
				{
					ProtectedBinary pb = new ProtectedBinary(false, vBytes);
					mEntry.Binaries.Set(strItem, pb);
				}
			}
			catch(Exception exAttach)
			{
				Toast.MakeText(this, GetString(Resource.String.AttachFailed)+" "+exAttach.Message, ToastLength.Long).Show();
			}
			populateBinaries();
		}
		
		protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
		{
			switch ((int)resultCode)
			{
			case RESULT_OK_ICON_PICKER:
				mSelectedIconID = (PwIcon) data.Extras.GetInt(IconPickerActivity.KEY_ICON_ID);
				mSelectedCustomIconID = PwUuid.Zero;
				String customIconIdString = data.Extras.GetString(IconPickerActivity.KEY_CUSTOM_ICON_ID);
				if (!String.IsNullOrEmpty(customIconIdString))
					mSelectedCustomIconID = new PwUuid(MemUtil.HexStringToByteArray(customIconIdString));
				mSelectedIcon = true;
				ImageButton currIconButton = (ImageButton) FindViewById(Resource.Id.icon_button);
				//TODO: custom image
				currIconButton.SetImageResource(Icons.iconToResId(mSelectedIconID));
				break;
				
			case RESULT_OK_PASSWORD_GENERATOR:
				String generatedPassword = data.GetStringExtra("keepass2android.password.generated_password");
				EditText password = (EditText) FindViewById(Resource.Id.entry_password);
				EditText confPassword = (EditText) FindViewById(Resource.Id.entry_confpassword);
				
				password.Text = generatedPassword;
				confPassword.Text = generatedPassword;
				
				break;
			case (int)Result.Ok:
					if (requestCode == Intents.REQUEST_CODE_FILE_BROWSE)
					{
						String filename = data.DataString;
						if (filename != null) {
							if (filename.StartsWith("file://")) {
								filename = filename.Substring(7);
							}
							
							filename = Java.Net.URLDecoder.Decode(filename);
							addBinaryOrAsk(filename);
						}
					}


				break;
			case (int)Result.Canceled:
				break;
			default:
				break;
			}
		}

		void populateBinaries()
		{
			ViewGroup binariesGroup = (ViewGroup)FindViewById(Resource.Id.binaries);
			binariesGroup.RemoveAllViews();
			RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FillParent, RelativeLayout.LayoutParams.WrapContent);
			foreach (KeyValuePair<string, ProtectedBinary> pair in mEntry.Binaries)
			{
				String key = pair.Key;
				Button binaryButton = new Button(this);

				binaryButton.Text = key;
				binaryButton.SetCompoundDrawablesWithIntrinsicBounds( Resources.GetDrawable(Android.Resource.Drawable.IcMenuDelete),null, null, null);
				binaryButton.Click += (object sender, EventArgs e) => 
				{
					Button btnSender = (Button)(sender);
					mEntry.Binaries.Remove(key);
					populateBinaries();

				};
				binariesGroup.AddView(binaryButton,layoutParams);
				
				
			}

			Button addBinaryButton = new Button(this);
			addBinaryButton.Text = GetString(Resource.String.add_binary);
			addBinaryButton.SetCompoundDrawablesWithIntrinsicBounds( Resources.GetDrawable(Android.Resource.Drawable.IcMenuAdd) , null, null, null);
			addBinaryButton.Click += (object sender, EventArgs e) => 
			{
				Util.showBrowseDialog("/mnt/sdcard", this);
			};
			binariesGroup.AddView(addBinaryButton,layoutParams);

			FindViewById(Resource.Id.entry_binaries_label).Visibility = mEntry.Binaries.UCount > 0 ? ViewStates.Visible : ViewStates.Gone;
		}
		public override bool OnCreateOptionsMenu(IMenu menu) {
			base.OnCreateOptionsMenu(menu);
			
			MenuInflater inflater = MenuInflater;
			inflater.Inflate(Resource.Menu.entry_edit, menu);
			
			
			IMenuItem togglePassword = menu.FindItem(Resource.Id.menu_toggle_pass);
			if ( mShowPassword ) {
				togglePassword.SetTitle(Resource.String.menu_hide_password);
			} else {
				togglePassword.SetTitle(Resource.String.show_password);
			}
			
			return true;
		}
		
		public override bool OnOptionsItemSelected(IMenuItem item) {
			switch ( item.ItemId ) {
			/*case Resource.Id.menu_donate:
				try {
					Util.gotoUrl(this, Resource.String.donate_url);
				} catch (ActivityNotFoundException) {
					Toast.MakeText(this, Resource.String.error_failed_to_launch_link, ToastLength.Long).Show();
					return false;
				}
				
				return true;*/
			case Resource.Id.menu_toggle_pass:
				if ( mShowPassword ) {
					item.SetTitle(Resource.String.show_password);
					mShowPassword = false;
				} else {
					item.SetTitle(Resource.String.menu_hide_password);
					mShowPassword = true;
				}
				setPasswordStyle();
				return true;
			case Resource.Id.menu_cancel_edit:
				Finish();
				break;
			}


			
			return base.OnOptionsItemSelected(item);
		}
		
		private void setPasswordStyle() {
			TextView password = (TextView) FindViewById(Resource.Id.entry_password);
			TextView confpassword = (TextView) FindViewById(Resource.Id.entry_confpassword);
			
			if ( mShowPassword ) {
				password.InputType = InputTypes.ClassText | InputTypes.TextVariationVisiblePassword;
				confpassword.InputType = InputTypes.ClassText | InputTypes.TextVariationVisiblePassword;
				
			} else {
				password.InputType = InputTypes.ClassText | InputTypes.TextVariationPassword;
				confpassword.InputType = InputTypes.ClassText | InputTypes.TextVariationPassword;
			}
		}

		void updateExpires()
		{
			if (mEntry.Expires)
			{
				populateText(Resource.Id.entry_expires, getDateTime(mEntry.ExpiryTime));
			}
			else
			{
				populateText(Resource.Id.entry_expires, GetString(Resource.String.never));
			}
			((CheckBox)FindViewById(Resource.Id.entry_expires_checkbox)).Checked = mEntry.Expires;
			((EditText)FindViewById(Resource.Id.entry_expires)).Enabled = mEntry.Expires;
		}
		
		private void fillData() {
			ImageButton currIconButton = (ImageButton) FindViewById(Resource.Id.icon_button);
			App.getDB().drawFactory.assignDrawableTo(currIconButton, Resources, App.getDB().pm, mEntry.IconId, mEntry.CustomIconUuid);
			
			populateText(Resource.Id.entry_title, mEntry.Strings.ReadSafe (PwDefs.TitleField));
			populateText(Resource.Id.entry_user_name, mEntry.Strings.ReadSafe (PwDefs.UserNameField));
			populateText(Resource.Id.entry_url, mEntry.Strings.ReadSafe (PwDefs.UrlField));
			
			String password = mEntry.Strings.ReadSafe(PwDefs.PasswordField);
			populateText(Resource.Id.entry_password, password);
			populateText(Resource.Id.entry_confpassword, password);
			setPasswordStyle();
			
			populateText(Resource.Id.entry_comment, mEntry.Strings.ReadSafe (PwDefs.NotesField));

			LinearLayout container = (LinearLayout) FindViewById(Resource.Id.advanced_container);
			
			foreach (var pair in mEntry.Strings)
			{
				String key = pair.Key;
				
				if (!PwDefs.IsStandardField(key)) {
					EntryEditSection ees = (EntryEditSection) LayoutInflater.Inflate(Resource.Layout.entry_edit_section, null);
					ees.setData(key, pair.Value);
					ees.getDeleteButton().Click += (sender, e) => deleteAdvancedString((View)sender);
					container.AddView(ees);
				}
			}

			populateBinaries();

			populateText(Resource.Id.entry_override_url, mEntry.OverrideUrl);
			populateText(Resource.Id.entry_tags, StrUtil.TagsToString(mEntry.Tags, true));

			updateExpires();
		}
		private String getDateTime(System.DateTime dt) {
			return dt.ToString ("g", CultureInfo.CurrentUICulture);
		}


		public void deleteAdvancedString(View view) {
			EntryEditSection section = (EntryEditSection) view.Parent;
			LinearLayout container = (LinearLayout) FindViewById(Resource.Id.advanced_container);
			
			for (int i = 0; i < container.ChildCount; i++) {
				EntryEditSection ees = (EntryEditSection) container.GetChildAt(i);
				if (ees == section) {
					container.RemoveViewAt(i);
					container.Invalidate();
					break;
				}
			}
		}
		

		protected bool validateBeforeSaving() {
			// Require title
			String title = Util.getEditText(this, Resource.Id.entry_title);
			if ( title.Length == 0 ) {
				Toast.MakeText(this, Resource.String.error_title_required, ToastLength.Long).Show();
				return false;
			}
			
			// Validate password
			String pass = Util.getEditText(this, Resource.Id.entry_password);
			String conf = Util.getEditText(this, Resource.Id.entry_confpassword);
			if ( ! pass.Equals(conf) ) {
				Toast.MakeText(this, Resource.String.error_pass_match, ToastLength.Long).Show();
				return false;
			}

			// Validate expiry date
			DateTime newExpiry = new DateTime();
			if ((mEntry.Expires) && (!DateTime.TryParse( Util.getEditText(this,Resource.Id.entry_expires), out newExpiry)))
		    {
				Toast.MakeText(this, Resource.String.error_invalid_expiry_date, ToastLength.Long).Show();
				return false;
			}
			else
			{
				mEntry.ExpiryTime = newExpiry;
			}

			
			LinearLayout container = (LinearLayout) FindViewById(Resource.Id.advanced_container);
			for (int i = 0; i < container.ChildCount; i++) {
				EntryEditSection ees = (EntryEditSection) container.GetChildAt(i);
				
				TextView keyView = (TextView) ees.FindViewById(Resource.Id.title);
				string key = keyView.Text;
				
				if (String.IsNullOrEmpty(key)) {
					Toast.MakeText(this, Resource.String.error_string_key, ToastLength.Long).Show();
					return false;
				}
				
			}
			
			return true;
		}

	
		private void populateText(int viewId, String text) {
			TextView tv = (TextView) FindViewById(viewId);
			tv.Text = text;
		}
		
		private class AfterSave : OnFinish {
			Activity act;
			public AfterSave(Handler handler, Activity act): base(handler) {
				this.act = act;
			}
			

			public override void run() {
				if ( mSuccess ) {
					act.Finish();
				} else {
					displayMessage(act);
				}
			}
			
		}
		
	}

}