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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 
 *     materials provided with the distribution. 
 * 
 * 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.Text;
using XenAdmin.Core;
using XenAPI;
using XenAdmin.Wizards;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Shows the New Sr wizard in re-attach mode.
    /// </summary>
    internal class ReattachSRCommand : 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 ReattachSRCommand()
        {
        }

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

        public ReattachSRCommand(IMainWindow mainWindow, SR sr)
            : base(mainWindow, sr)
        {
        }

        private void Execute(SR sr)
        {
            if (CanReattachSR(sr))
            {
                MainWindowCommandInterface.ShowPerConnectionWizard(sr.Connection, new NewSRWizard(sr.Connection, sr));
            }
        }

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            Execute((SR)selection[0].XenObject);
        }

        protected override bool CanExecuteCore(SelectedItemCollection selection)
        {
            if (selection.Count == 1)
            {
                return CanReattachSR(selection[0].XenObject as SR);
            }
            return false;
        }

        private static bool CanReattachSR(SR sr)
        {
            return sr != null
                && !sr.HasPBDs
                && sr.CanCreateWithXenCenter
                && !HelpersGUI.GetActionInProgress(sr)
                && !(sr.type == "cslg" && Helpers.FeatureForbidden(sr.Connection, Host.RestrictStorageChoices))
                && (SM.GetByType(sr.Connection, sr.type) != null);
        }

        public override string MenuText
        {
            get
            {
                return Messages.MAINWINDOW_REATTACH_SR;
            }
        }
    }
}