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 *     following disclaimer. 
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 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
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 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using XenAdmin.Network;
using XenAPI;

namespace XenAdmin.Controls
{
    public class NetworkComboBox : LongStringComboBox
    {
        public NetworkComboBox()
        {
            DropDownStyle = ComboBoxStyle.DropDownList;
        }

        public bool IncludePoolNameInComboBox { get; set; }
        public bool IncludeOnlyEnabledNetworksInComboBox { get; set; }
        public bool IncludeOnlyNetworksWithIPAddresses { get; set; }

        private IXenConnection PopulateConnection { get; set; }

        public void PopulateComboBox(IXenConnection connection)
        {
            PopulateConnection = connection;
            Items.Clear();

            var pifArray = connection.Cache.PIFs;

            foreach (var pif in pifArray)
            {
                var curPif = pif;
                var count = (from NetworkComboBoxItem existingItem in Items
                             where existingItem.Network.opaque_ref == curPif.network.opaque_ref
                             select existingItem).Count();
                if (count > 0)
                    continue;

                
                var item = CreateNewItem(pif);

                AddItemToComboBox(item);

                if (item.IsManagement)
                {
                    SelectedItem = item;
                }
                    
            }
        }

        public void SelectFirstNonManagementNetwork()
        {
            foreach (NetworkComboBoxItem item in Items)
            {
                if (!item.IsManagement)
                {
                    SelectedItem = item;
                    return;
                }
            }
        }

        private void AddItemToComboBox(NetworkComboBoxItem item)
        {                
            if( IncludeOnlyEnabledNetworksInComboBox && !item.NetworkIsConnected )
            {
                return;
            }

            if (IncludeOnlyNetworksWithIPAddresses && !item.HasIPAddress)
            {
                return;
            }

            Items.Add(item);
        }

        private NetworkComboBoxItem CreateNewItem(PIF pif)
        {
            var network = PopulateConnection.Resolve(pif.network);

            return new NetworkComboBoxItem
                       {
                           IncludePoolNameInComboBox = IncludePoolNameInComboBox,
                           IsManagement = pif.management,
                           Network = network,
                           NetworkIsConnected = pif.LinkStatus == PIF.LinkState.Connected,
                           HasIPAddress = pif.IsManagementInterface(false)
                       };
        }

        /// <summary>
        /// Get the uuid of the selected item along with its name in a pair
        /// </summary>
        public KeyValuePair<string, string> SelectedNetworkUuid
        {
            get
            {
                var selectedItem = (NetworkComboBoxItem)SelectedItem;
                return selectedItem == null
                        ? new KeyValuePair<string, string>(string.Empty, string.Empty)
                        : new KeyValuePair<string, string>(selectedItem.Network.uuid, selectedItem.Network.Name);
            }
        }
    }
}