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using XenAdmin.Core;
using XenAdmin.Network;
using XenAdmin.Properties;
using System.Drawing;
using XenAdmin.Wizards.RollingUpgradeWizard;

namespace XenAdmin.Commands
{
    /// <summary>
    /// Shows the rolling pool upgrade wizard.
    /// </summary>
    internal class RollingUpgradeCommand : Command
    {
        /// <summary>
        /// Initializes a new instance of this Command. The parameter-less constructor is required if 
        /// this Command is to be attached to a ToolStrip menu item or button. It should not be used in any other scenario.
        /// </summary>
        public RollingUpgradeCommand()
        {
        }

        public RollingUpgradeCommand(IMainWindow mainWindow)
            : base(mainWindow)
        {
        }

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            MainWindowCommandInterface.ShowForm(typeof (RollingUpgradeWizard));
        }

        protected override bool CanExecuteCore(SelectedItemCollection selection)
        {
            foreach (IXenConnection xenConnection in ConnectionsManager.XenConnectionsCopy)
            {
                if (!xenConnection.IsConnected)
                    continue;

                var pool = Helpers.GetPoolOfOne(xenConnection);
                if (pool != null && pool.IsUpgradeForbidden)
                    continue;

                return true;
            }
            return false;
        }

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