/* ========================================================================
 * Copyright (c) 2005-2011 The OPC Foundation, Inc. All rights reserved.
 *
 * OPC Foundation MIT License 1.00
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * The complete license agreement can be found here:
 * http://opcfoundation.org/License/MIT/1.00/
 * ======================================================================*/

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Text;
using Opc.Ua;

namespace Opc.Ua.Gds
{
    /// <summary>
    /// Prompts the user to select an area to use as an event filter.
    /// </summary>
    public partial class UserIdentityDialog : Form
    {
        #region Constructors
        /// <summary>
        /// Creates an empty form.
        /// </summary>
        public UserIdentityDialog()
        {
            InitializeComponent();
        }
        #endregion
        
        #region Private Fields
        #endregion

        #region Public Interface
        public UserIdentity ShowDialog(IWin32Window owner, string caption, UserIdentity identity)
        {
            if (!String.IsNullOrEmpty(caption))
            {
                InstructuctionsLabel.Text = caption;
                InstructuctionsLabel.Visible = true;
            }

            UserNameTextBox.Text = null;
            PasswordTextBox.Text = null;

            if (identity != null)
            {
                UserNameIdentityToken token = identity.GetIdentityToken() as UserNameIdentityToken;

                if (token != null)
                {
                    UserNameTextBox.Text = token.UserName;
                    PasswordTextBox.Text = token.DecryptedPassword;
                }
            }

            if (base.ShowDialog(owner) != DialogResult.OK)
            {
                return null;
            }

            return new UserIdentity(UserNameTextBox.Text.Trim(), PasswordTextBox.Text.Trim());
        }
        #endregion
        
        #region Private Methods
        #endregion

        #region Event Handlers
        private void OkButton_Click(object sender, EventArgs e)
        {
            try
            {
                string username = UserNameTextBox.Text.Trim();

                if (String.IsNullOrEmpty(username))
                {
                    throw new ArgumentException("UserName must not be empty.", "UserName");
                }

                DialogResult = DialogResult.OK;
            }
            catch (Exception exception)
            {
                MessageBox.Show(Text + ": " + exception.Message);
            }
        }
        #endregion
    }
}