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 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
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 *     following disclaimer. 
 * *   Redistributions in binary form must reproduce the above 
 *     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 
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
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 */

using System;
using XenAdmin.Actions;
using XenAdmin.Core;
using XenAdmin.Diagnostics.Checks;
using XenAdmin.Network;
using XenAPI;


namespace XenAdmin.Diagnostics.Problems.VMProblem
{
    public class AutoStartEnabled : Problem
    {
        private XenRef<VM> _VMref;
        private IXenConnection _connection;
        public AutoStartEnabled(Check check, VM vm)
            : base(check)
        {
            _VMref = new XenRef<VM>(vm);
            _connection = vm.Connection;
        }

        public override string Description
        {
            get { return string.Format(Messages.AUTOSTART_ENABLED_CHECK_DESCRIPTION, Helpers.GetName(VM).Ellipsise(30)); }
        }

        protected override AsyncAction CreateAction(out bool cancelled)
        {
            cancelled = false;
            return new DelegatedAsyncAction(_connection, "", "", null, ActionDelegate(false));
        }

        private VM VM
        {
            get
            {
                return _connection.Resolve(_VMref);
            }
        }

        public override string HelpMessage
        {
            get { return Messages.DISABLE_NOAMP; }
        }

        public sealed override string Title
        {
            get { return string.Format(Messages.PROBLEM_VMPROBLEM_TITLE, Helpers.GetName(VM).Ellipsise(30)); }
        }

        private Action<Session> ActionDelegate(bool autostartValue)
        {
            return delegate(Session session)
                       {
                           var vm = _connection.Resolve(_VMref);
                           var vmclone = (VM)vm.Clone();
                           vm.Locked = true;
                           vmclone.SetAutoPowerOn(autostartValue);
                           try
                           {
                               vmclone.SaveChanges(session);
                           }
                           finally
                           {
                               vm.Locked = false;
                           }

                       };
        }

        public override AsyncAction UnwindChanges()
        {
            return new DelegatedAsyncAction(
               _connection,
               "",
               "",
               null,
               ActionDelegate(true));
        }
    }
}