/* ========================================================================
 * Copyright (c) 2005-2019 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.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Reflection;

using Opc.Ua.Client;
using Opc.Ua.Client.Controls;

namespace Opc.Ua.Sample.Controls
{
    public partial class CreateMonitoredItemsDlg : Form
    {
        #region Constructors
        public CreateMonitoredItemsDlg()
        {
            InitializeComponent();
            this.Icon = ClientUtils.GetAppIcon();
            m_SubscriptionStateChanged = new SubscriptionStateChangedEventHandler(Subscription_StateChanged);
        }
        #endregion

        #region Private Fields
        private Subscription m_subscription;
        private SubscriptionStateChangedEventHandler m_SubscriptionStateChanged;
        #endregion
        
        #region Public Interface
        /// <summary>
        /// Displays the dialog.
        /// </summary>
        public void Show(Subscription subscription, bool useTypeModel)
        {
            if (subscription == null) throw new ArgumentNullException("subscription");
            
            Show();
            BringToFront();

            // remove previous subscription.
            if (m_subscription != null)
            {
                m_subscription.StateChanged -= m_SubscriptionStateChanged;
            }
            
            // start receiving notifications from the new subscription.
            m_subscription = subscription;
  
            if (subscription != null)
            {
                m_subscription.StateChanged += m_SubscriptionStateChanged;
            }                    

            m_subscription = subscription;
            
            BrowseCTRL.AllowPick = true;
            BrowseCTRL.SetView(subscription.Session, (useTypeModel)?BrowseViewType.ObjectTypes:BrowseViewType.Objects, null);

            MonitoredItemsCTRL.Initialize(subscription);
        }
        #endregion
        
        #region Event Handlers
        /// <summary>
        /// Handles a change to the state of the subscription.
        /// </summary>
        void Subscription_StateChanged(Subscription subscription, SubscriptionStateChangedEventArgs e)
        {
            if (InvokeRequired)
            {
                BeginInvoke(m_SubscriptionStateChanged, subscription, e);
                return;
            }
            else if (!IsHandleCreated)
            {
                return;
            }

            try
            {
                // ignore notifications for other subscriptions.
                if (!Object.ReferenceEquals(m_subscription,  subscription))
                {
                    return;
                }

                // notify controls of the change.
                MonitoredItemsCTRL.SubscriptionChanged(e);
            }
            catch (Exception exception)
            {
				GuiUtils.HandleException(this.Text, MethodBase.GetCurrentMethod(), exception);
            }
        }

        private void BrowseCTRL_ItemsSelected(object sender, NodesSelectedEventArgs e)
        {
            try
            {
                foreach (ReferenceDescription reference in e.References)
                {
                    if (reference.ReferenceTypeId == ReferenceTypeIds.HasProperty || reference.IsForward)
                    {
                        MonitoredItemsCTRL.AddItem(reference);
                    }
                }
            }
            catch (Exception exception)
            {
				GuiUtils.HandleException(this.Text, MethodBase.GetCurrentMethod(), exception);
            }
        }

        private void ApplyBTN_Click(object sender, EventArgs e)
        {
            try
            {
                MonitoredItemsCTRL.ApplyChanges(true);
            }
            catch (Exception exception)
            {
				GuiUtils.HandleException(this.Text, MethodBase.GetCurrentMethod(), exception);
            }
        }

        private void CancelBTN_Click(object sender, EventArgs e)
        {
            try
            {
                Close();
            }
            catch (Exception exception)
            {
				GuiUtils.HandleException(this.Text, MethodBase.GetCurrentMethod(), exception);
            }
        }
        #endregion
    }
}