/* Copyright (c) Citrix Systems, Inc. 
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 * 
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 * 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 
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
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using System;
using System.Collections.Generic;
using System.Windows.Forms;
using XenAdmin.Core;
using XenAPI;


namespace XenAdmin.Wizards.RollingUpgradeWizard.PlanActions
{
    public class UpgradeAutomatedHostPlanAction : UpgradeHostPlanAction
    {
        private readonly Dictionary<string, string> _arguments;

        public UpgradeAutomatedHostPlanAction(Host host, Control invokingControl, Dictionary<string, string> arguments)
            : base(host, invokingControl)
        {
            _arguments = arguments ?? new Dictionary<string, string>();
        }

        protected override void RunWithSession(ref Session session)
        {
            string hostVersionBefore = CurrentHost.LongProductVersion();

            string productVersion = null;
            try
            {
                var result = Host.call_plugin(session, HostXenRef.opaque_ref, "prepare_host_upgrade.py", "getVersion", _arguments);
                var serializer = new System.Web.Script.Serialization.JavaScriptSerializer();
                var version = (Dictionary<string, object>)serializer.DeserializeObject(result);
                productVersion = version.ContainsKey("product-version") ? (string)version["product-version"] : null;
            }
            catch (Exception exception)
            {
                log.WarnFormat("Exception while trying to get the upgrade version: {0}", exception.Message);
            }
             
            log.InfoFormat("Host '{0}' upgrading from version '{1}' to version '{2}'", CurrentHost.Name(), hostVersionBefore, productVersion ?? "unknown");

            string value = Host.call_plugin(session, HostXenRef.opaque_ref, "prepare_host_upgrade.py", "main", _arguments);
            if (value.ToLower() == "true")
                Upgrade(ref session, productVersion);
            else
                throw new Exception(value);

            Host hostAfterReboot = GetResolvedHost();
            if (hostAfterReboot == null)
            {
                log.InfoFormat("Cannot check host's version after reboot because the host '{0}' cannot be resolved", CurrentHost.Name());
            }
            else
            {
                if (Helpers.SameServerVersion(hostAfterReboot, hostVersionBefore))
                {
                    log.ErrorFormat("Host '{0}' rebooted with the same version '{1}'", hostAfterReboot.Name(), hostAfterReboot.LongProductVersion());
                    var error = new Exception(Messages.REBOOT_WITH_SAME_VERSION);
                    //when the slave reboots with the same version do not interrupt the process,
                    //so set the error without throwing it
                    if (hostAfterReboot.IsMaster())
                        throw error;
                    Error = error;
                }

                log.InfoFormat("Host '{0}' upgraded with version '{1}'", hostAfterReboot.Name(), hostAfterReboot.LongProductVersion());
            }
        }
    }
}