/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * 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.Collections.Generic;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;

namespace ASC.Core.ChunkedUploader
{
    [Serializable]
    public class CommonChunkedUploadSession : ICloneable
    {
        public string Id { get; set; }

        public DateTime Created { get; set; }

        public DateTime Expired { get; set; }

        public string Location { get; set; }

        public long BytesUploaded { get; set; }

        public long BytesTotal { get; set; }

        public int TenantId { get; set; }

        public Guid UserId { get; set; }

        public bool UseChunks { get; set; }

        public string CultureName { get; set; }

        public readonly Dictionary<string, object> Items = new Dictionary<string, object>();

        private const string TempPathKey = "TempPath";
        public string TempPath
        {
            get { return GetItemOrDefault<string>(TempPathKey); }
            set { Items[TempPathKey] = value; }
        }

        private const string UploadIdKey = "UploadId";
        public string UploadId
        {
            get { return GetItemOrDefault<string>(UploadIdKey); }
            set { Items[UploadIdKey] = value; }
        }

        private const string ChunksBufferKey = "ChunksBuffer";
        public string ChunksBuffer
        {
            get { return GetItemOrDefault<string>(ChunksBufferKey); }
            set { Items[ChunksBufferKey] = value; }
        }

        public CommonChunkedUploadSession(long bytesTotal)
        {
            Id = Guid.NewGuid().ToString("N");
            Created = DateTime.UtcNow;
            BytesUploaded = 0;
            BytesTotal = bytesTotal;
            UseChunks = true;
        }

        public T GetItemOrDefault<T>(string key)
        {
            return Items.ContainsKey(key) && Items[key] is T ? (T)Items[key] : default;
        }

        public Stream Serialize()
        {
            var stream = new MemoryStream();
            new BinaryFormatter().Serialize(stream, this);
            return stream;
        }

        public static CommonChunkedUploadSession Deserialize(Stream stream)
        {
            return (CommonChunkedUploadSession)new BinaryFormatter().Deserialize(stream);
        }

        public virtual object Clone()
        {
            return (CommonChunkedUploadSession)MemberwiseClone();
        }
    }
}