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using System.Collections.Generic;
using XenAdmin.Alerts;
using XenAdmin.Network;
using XenAdmin.Core;
using XenAPI;

namespace XenAdmin.Actions
{
    public class RestoreDismissedUpdatesAction : AsyncAction
    {
        public RestoreDismissedUpdatesAction(IXenConnection connection)
            : base(connection, "restore_dismissed_updates", "restore_dismissed_updates", true)
        {
        }

        protected override void Run()
        {
            if (!AllowedToRestoreDismissedUpdates())
                return;

            XenAPI.Pool pool = Helpers.GetPoolOfOne(Connection);
            if (pool == null)
                return;

            Dictionary<string, string> other_config = pool.other_config;

            if (other_config.ContainsKey(XenServerPatchAlert.IgnorePatchKey))
                other_config.Remove(XenServerPatchAlert.IgnorePatchKey);

            if (other_config.ContainsKey(XenServerVersionAlert.LAST_SEEN_SERVER_VERSION_KEY))
                other_config.Remove(XenServerVersionAlert.LAST_SEEN_SERVER_VERSION_KEY);


            XenAPI.Pool.set_other_config(Connection.Session, pool.opaque_ref, other_config);
        }

        /// <summary>
        /// Checks the user has sufficient RBAC privileges to restore dismissed alerts on a given connection
        /// </summary>
        private bool AllowedToRestoreDismissedUpdates()
        {
            if (Connection == null || Connection.Session == null)
                return false;

            if (Connection.Session.IsLocalSuperuser)
                return true;

            List<Role> rolesAbleToCompleteAction = Role.ValidRoleList("Pool.set_other_config", Connection);
            foreach (Role possibleRole in rolesAbleToCompleteAction)
            {
                if (Connection.Session.Roles.Contains(possibleRole))
                    return true;
            }
            return false;
        }
    }
}