// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
//
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For details, see
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
//
// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
//
// The  interactive user interfaces in modified source and object code versions of the Program must
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
//
// Pursuant to Section 7(b) of the License you must retain the original Product logo when
// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
// trademark law for use of our trademarks.
//
// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode

namespace ASC.Files.AutoCleanUp;

[Singletone]
public class Launcher : BackgroundService
{
    private readonly ILogger<Launcher> _logger;
    private readonly Worker _worker;
    private readonly TimeSpan _period;

    public Launcher(ILogger<Launcher> logger, Worker worker, IConfiguration configuration)
    {
        _logger = logger;
        _worker = worker;
        _period = TimeSpan.Parse(configuration.GetValue<string>("files:autoCleanUp:period") ?? "0:5:0");
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        _logger.InformationAutoCleanUpWorkerRunning();

        while (!stoppingToken.IsCancellationRequested)
        {
            await Procedure(stoppingToken);
        }

        _logger.InformationAutoCleanUpWorkerStopping();
    }

    private async Task Procedure(CancellationToken stoppingToken)
    {
        _logger.TraceAutoCleanUpStart();

        if (stoppingToken.IsCancellationRequested)
        {
            return;
        }

        await _worker.DeleteExpiredFilesInTrash(stoppingToken);

        _logger.TraceAutoCleanUpProcedureFinish();

        await Task.Delay(_period, stoppingToken);
    }
}