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

namespace XenAdmin.Wizards.PatchingWizard.PlanActions
{
    class RemoveUpdateFileFromMasterPlanAction : PlanActionWithSession
    {
        private readonly List<PoolPatchMapping> patchMappings = new List<PoolPatchMapping>();
        private readonly XenServerPatch patch = null;
        private readonly Host master = null;

        public RemoveUpdateFileFromMasterPlanAction(Host master, List<PoolPatchMapping> patchMappings, XenServerPatch patch)
            : base(master.Connection, string.Format(Messages.UPDATES_WIZARD_REMOVING_UPDATES_FROM_POOL, master.Name))
        {
            this.patchMappings = patchMappings;
            this.patch = patch;
            this.master = master;
        }

        protected override void RunWithSession(ref Session session)
        {
            try
            {
                Pool_patch poolPatch = null;

                var mapping = patchMappings.FirstOrDefault(pm => pm.Host == master && pm.XenServerPatch == patch);

                if (mapping != null || mapping.Pool_patch != null && mapping.Pool_patch.opaque_ref != null)
                {
                    poolPatch = mapping.Pool_patch;
                }
                else
                {
                    poolPatch = session.Connection.Cache.Pool_patches.FirstOrDefault(pp => string.Equals(pp.uuid, patch.Uuid, System.StringComparison.InvariantCultureIgnoreCase));
                }

                if (poolPatch != null && poolPatch.opaque_ref != null )
                {
                    var task = Pool_patch.async_pool_clean(session, mapping.Pool_patch.opaque_ref);
                    PollTaskForResultAndDestroy(Connection, ref session, task);

                    patchMappings.Remove(mapping);
                }
            }
            catch (Exception ex)
            {
                //best effort
                log.Error("Failed to remove Pool_patch from the server.", ex);
            }
        }
    }
}