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using System.Collections.Generic;
using System.Linq;
using XenAdmin.Actions;
using XenAdmin.Core;
using XenAPI;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Reboots the selected host. Shows a confirmation dialog.
    /// </summary>
    internal class RestartToolstackCommand : 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 RestartToolstackCommand()
        {
        }

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

        protected override void RunCore(SelectedItemCollection selection)
        {
            var actions = new List<AsyncAction>();
            var liveHosts = selection.AsXenObjects<Host>().Where(h => h.IsLive());

            foreach (Host host in liveHosts)
            {
                MainWindowCommandInterface.CloseActiveWizards(host.Connection);
                var action = new RestartToolstackAction(host);
                actions.Add(action);
            }
            RunMultipleActions(actions, null, Messages.ACTION_TOOLSTACK_RESTARTING, Messages.ACTION_TOOLSTACK_RESTARTED, true);
        }

        protected override bool CanRunCore(SelectedItemCollection selection)
        {
            return selection.AllItemsAre<Host>() && selection.Any(item => ((Host)item.XenObject).IsLive());
        }

        protected override string GetCantRunReasonCore(IXenObject item)
        {
            Host host = item as Host;
            
            if (host == null)
                return base.GetCantRunReasonCore(item);

            if (!host.IsLive())
                return Messages.HOST_NOT_LIVE;

            return base.GetCantRunReasonCore(item);
        }

        public override string MenuText => Messages.MAINWINDOW_RESTART_TOOLSTACK;

        public override string ContextMenuText => Messages.MAINWINDOW_RESTART_TOOLSTACK;

        protected override bool ConfirmationRequired => true;

        protected override string ConfirmationDialogText
        {
            get
            {
                List<Host> hosts = GetSelection().AsXenObjects<Host>();

                return hosts.Count == 1
                           ? string.Format(Messages.CONFIRM_RESTART_TOOLSTACK_ONE_SERVER, hosts[0].Name().Ellipsise(30), BrandManager.BrandConsole)
                           : string.Format(Messages.CONFIRM_RESTART_TOOLSTACK_MANY_SERVERS, BrandManager.BrandConsole);
            }
        }

        protected override string ConfirmationDialogTitle => Messages.CONFIRM_RESTART_TOOLSTACK_TITLE;
    }
}