/*
 *
 * (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.Linq;
using System.Text.Json.Serialization;

using ASC.Core.Common.Settings;

namespace ASC.Web.Studio.Core.TFA
{
    [Serializable]
    public class TfaAppUserSettings : ISettings
    {
        [JsonPropertyName("BackupCodes")]
        public IEnumerable<BackupCode> CodesSetting { get; set; }

        [JsonPropertyName("Salt")]
        public long SaltSetting { get; set; }

        public Guid ID
        {
            get { return new Guid("{EAF10611-BE1E-4634-B7A1-57F913042F78}"); }
        }

        public ISettings GetDefault(IServiceProvider serviceProvider)
        {
            return new TfaAppUserSettings
            {
                CodesSetting = new List<BackupCode>(),
                SaltSetting = 0
            };
        }

        public static long GetSalt(SettingsManager settingsManager, Guid userId)
        {
            var settings = settingsManager.LoadForUser<TfaAppUserSettings>(userId);
            var salt = settings.SaltSetting;
            if (salt == 0)
            {
                var from = new DateTime(2018, 07, 07, 0, 0, 0, DateTimeKind.Utc);
                settings.SaltSetting = salt = (long)(DateTime.UtcNow - from).TotalMilliseconds;

                settingsManager.SaveForUser<TfaAppUserSettings>(settings, userId);
            }
            return salt;
        }

        public static IEnumerable<BackupCode> BackupCodesForUser(SettingsManager settingsManager, Guid userId)
        {
            return settingsManager.LoadForUser<TfaAppUserSettings>(userId).CodesSetting;
        }

        public static void DisableCodeForUser(SettingsManager settingsManager, Guid userId, string code)
        {
            var settings = settingsManager.LoadForUser<TfaAppUserSettings>(userId);
            var query = settings.CodesSetting.Where(x => x.Code == code).ToList();

            if (query.Any())
                query.First().IsUsed = true;

            settingsManager.SaveForUser(settings, userId);
        }

        public static bool EnableForUser(SettingsManager settingsManager, Guid guid)
        {
            return settingsManager.LoadForUser<TfaAppUserSettings>(guid).CodesSetting.Any();
        }

        public static void DisableForUser(IServiceProvider serviceProvider, SettingsManager settingsManager, Guid guid)
        {
            if (new TfaAppUserSettings().GetDefault(serviceProvider) is TfaAppUserSettings defaultSettings)
            {
                settingsManager.SaveForUser(defaultSettings, guid);
            }
        }


    }
}