/*
 *
 * (c) Copyright Ascensio System Limited 2010-2020
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL 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 more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/


using System;
using System.IO;
using ASC.Data.Storage;

namespace ASC.Data.Backup.Storage
{
    internal class DataStoreBackupStorage : IBackupStorage
    {
        private readonly string webConfigPath;
        private readonly int _tenant;
        private readonly StorageFactory storageFactory;
        public DataStoreBackupStorage(int tenant, string webConfigPath, StorageFactory storageFactory)
        {
            this.webConfigPath = webConfigPath;
            _tenant = tenant;
            this.storageFactory = storageFactory;
        }

        public string Upload(string storageBasePath, string localPath, Guid userId)
        {
            using (var stream = File.OpenRead(localPath))
            {
                var storagePath = Path.GetFileName(localPath);
                GetDataStore().Save("", storagePath, stream);
                return storagePath;
            }
        }

        public void Download(string storagePath, string targetLocalPath)
        {
            using (var source = GetDataStore().GetReadStream("", storagePath))
            using (var destination = File.OpenWrite(targetLocalPath))
            {
                source.CopyTo(destination);
            }
        }

        public void Delete(string storagePath)
        {
            var dataStore = GetDataStore();
            if (dataStore.IsFile("", storagePath))
            {
                dataStore.Delete("", storagePath);   
            }
        }

        public bool IsExists(string storagePath)
        {
            return GetDataStore().IsFile("", storagePath);
        }

        public string GetPublicLink(string storagePath)
        {
            return GetDataStore().GetPreSignedUri("", storagePath, TimeSpan.FromDays(1), null).ToString();
        }

        protected virtual IDataStore GetDataStore()
        {
            return storageFactory.GetStorage(webConfigPath, _tenant.ToString(), "backup", null);
        }
    }
}