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


namespace XenAdmin.Wizards.PatchingWizard.PlanActions
{
    public class RestartHostPlanAction : RebootPlanAction
    {
        private readonly List<XenRef<VM>> _vms;
        public bool EnableOnly { get; set; }
        private readonly bool _restartAgentFallback;
        private List<string> hostsNeedReboot;

        public RestartHostPlanAction(Host host, List<XenRef<VM>> vms, bool enableOnly = false, bool restartAgentFallback = false, List<string> hostsThatWillRequireReboot = null)
            : base(host)
        {
            _vms = vms;
            EnableOnly = enableOnly;
            _restartAgentFallback = restartAgentFallback;
            hostsNeedReboot = hostsThatWillRequireReboot;
        }

        protected override void RunWithSession(ref Session session)
        {
            var hostObj = GetResolvedHost();
            if (hostObj == null)
                return;

            if (SkipRestartHost(hostObj))
            {
                if (_restartAgentFallback)
                    RestartAgent(ref session);

                if (!EnableOnly)
                    BringBabiesBack(ref session, _vms, EnableOnly);
                return;
            }

            EvacuateHost(ref session);
            RebootHost(ref session);
            BringBabiesBack(ref session, _vms, EnableOnly);

            if (hostsNeedReboot != null && hostsNeedReboot.Contains(hostObj.uuid))
                hostsNeedReboot.Remove(hostObj.uuid);
        }

        public bool SkipRestartHost(Host host)
        {
            if (hostsNeedReboot != null
                && !hostsNeedReboot.Contains(host.uuid)
                && Helpers.ElyOrGreater(host)
                && host.updates_requiring_reboot.Count <= 0)
            {
                return true;
            }
            return false;
        }
    }
}