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using System.Collections.Generic;
using XenAdmin.Core;
using XenAdmin.Wizards;
using XenAPI;


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

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

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

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

        public override string MenuText => Messages.MAINWINDOW_REATTACH_SR;
    }
}
