/* Copyright (c) Citrix Systems, Inc. 
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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 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
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 */

using System;
using System.Collections.Generic;
using System.IO;
using XenAPI;
using XenAdmin.Actions.HostActions;

namespace XenAdmin.Actions
{
    public class ApplyLicenseAction : AsyncAction
    {
        private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

        private readonly String Filepath;

        private readonly bool ActivateFreeLicense;

        public ApplyLicenseAction(Network.IXenConnection connection, Host host, string filepath)
            : base(connection, string.Format(Messages.APPLYLICENSE_TITLE, host.Name), Messages.APPLYLICENSE_PREP)
        {
            this.Host = host;
            this.Filepath = filepath;
            this.ActivateFreeLicense = false;
        }

        public ApplyLicenseAction(Network.IXenConnection connection, Host host, string filepath, bool activateFreeLicense)
            : base(connection, string.Format(Messages.APPLYLICENSE_TITLE, host.Name), Messages.APPLYLICENSE_PREP)
        {
            this.Host = host;
            this.Filepath = filepath;
            this.ActivateFreeLicense = activateFreeLicense;
        }

        protected override void Run()
        {
            SafeToExit = false;
            if (Connection.IsConnected)
            {
                if (!File.Exists(Filepath))
                {
                    throw new Exception(Messages.LICENSE_FILE_DOES_NOT_EXIST);
                }
                if (new FileInfo(Filepath).Length > 1048576)
                {
                    throw new Exception(Messages.LICENSE_FILE_TOO_LARGE);
                }

                string encodedContent = Convert.ToBase64String(File.ReadAllBytes(Filepath));

                // PR-1102: catch the host's license data, before applying the new one, so it can be sent later to the licensing server
                LicensingHelper.LicenseDataStruct previousLicenseData = new LicensingHelper.LicenseDataStruct(this.Host);

                this.Description = string.Format(Messages.APPLYLICENSE_APPLYING, Filepath);
                log.DebugFormat("Applying license to server {0}", this.Host.Name);
                RelatedTask = XenAPI.Host.async_license_apply(this.Session, this.Host.opaque_ref, encodedContent);
                PollToCompletion();
                this.Description = Messages.APPLYLICENSE_APPLIED;

                // PR-1102: send licensing data to the activation server
                Dictionary<Host, LicensingHelper.LicenseDataStruct> hosts = new Dictionary<Host, LicensingHelper.LicenseDataStruct>();
                hosts.Add(this.Host, previousLicenseData);
                if (ActivateFreeLicense)
                    LicensingHelper.SendActivationData(hosts);
                else
                    LicensingHelper.SendLicenseEditionData(hosts, "");
            }
        }
    }
}