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 *     following disclaimer. 
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 *     following disclaimer in the documentation and/or other 
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using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using XenAdmin.Core;
using XenAdmin.Dialogs;
using XenAdmin.Network;
using XenAdmin.Properties;
using XenAdmin.Wizards.CrossPoolMigrateWizard;
using XenAdmin.Wizards.CrossPoolMigrateWizard.Filters;
using XenAPI;


namespace XenAdmin.Commands
{
    internal class CrossPoolMigrateCommand : VMOperationCommand
    {

        public CrossPoolMigrateCommand(IMainWindow mainWindow, IEnumerable<SelectedItem> selection)
            : base(mainWindow, selection)
        { }

        protected Host preSelectedHost = null;
        public CrossPoolMigrateCommand(IMainWindow mainWindow, IEnumerable<SelectedItem> selection, Host preSelectedHost)
            : base(mainWindow, selection)
        {
            this.preSelectedHost = preSelectedHost;
        }

        public override string MenuText
        {
            get { return preSelectedHost == null ? Messages.HOST_MENU_CPM_TEXT : preSelectedHost.Name.EscapeAmpersands(); }
        }

        public override string ContextMenuText { get { return Messages.HOST_MENU_CPM_TEXT; } }

        public override Image MenuImage
        {
            get { return preSelectedHost == null ? Resources._000_MigrateVM_h32bit_16 : Resources._000_TreeConnected_h32bit_16; }
        }

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            var con = selection.GetConnectionOfFirstItem();

            if (Helpers.FeatureForbidden(con, Host.RestrictCrossPoolMigrate))
            {
                ShowUpsellDialog(Parent);
            }
            else
            {
                MainWindowCommandInterface.ShowPerConnectionWizard(con, 
                    new CrossPoolMigrateWizard(con, selection, preSelectedHost, WizardMode.Migrate));
            }

        }

        protected override Host GetHost(VM vm)
        {
            return Helpers.GetMaster(vm.Connection);
        }

        public static void ShowUpsellDialog(IWin32Window parent)
        {
            using (var  dlg = new UpsellDialog(HiddenFeatures.LinkLabelHidden ? Messages.UPSELL_BLURB_CPM : Messages.UPSELL_BLURB_CPM + Messages.UPSELL_BLURB_CPM_MORE,
                                                InvisibleMessages.UPSELL_LEARNMOREURL_CPM))
                dlg.ShowDialog(parent);
        }

        protected override bool CanExecute(VM vm)
        {
            return CanExecute(vm, preSelectedHost);
        }

        public static bool CanExecute(VM vm, Host preselectedHost)
        {
            bool failureFound = false;

            if (preselectedHost != null)
            {
                failureFound = new CrossPoolMigrateCanMigrateFilter(preselectedHost, new List<VM> {vm}, WizardMode.Migrate).FailureFound;
            }

            return !failureFound &&
                   vm.allowed_operations != null &&
                   vm.allowed_operations.Contains(vm_operations.migrate_send) &&
                   !Helpers.CrossPoolMigrationRestrictedWithWlb(vm.Connection) &&
                   vm.SRs.ToList().All(sr=> sr != null && !sr.HBALunPerVDI) &&
                   (preselectedHost == null || vm.Connection.Resolve(vm.resident_on) != preselectedHost); //Not the same as the pre-selected host
        }
    }
}