/*
 *
 * (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.Linq;
using System.Security;
using ASC.Common.Data;
using ASC.Common.Utils;
using ASC.Core;
using ASC.Core.Users;
using ASC.FederatedLogin;
using ASC.FederatedLogin.Profile;
using ASC.Security.Cryptography;
using SecurityContext = ASC.Core.SecurityContext;

namespace ASC.Web.Studio.Core
{
    public static class BlockchainLoginProvider
    {
        public static void UpdateData(
            string account,
            UserManager userManager,
            TenantManager tenantManager,
            SecurityContext securityContext,
            Signature signature,
            InstanceCrypto instanceCrypto,
            DbOptionsManager dbOptions,
            AccountLinkerStorage accountLinkerStorage)
        {
            var tenant = tenantManager.GetCurrentTenant();
            var user = userManager.GetUsers(securityContext.CurrentAccount.ID);
            if (!securityContext.IsAuthenticated || user.IsVisitor(userManager)) throw new SecurityException();

            var loginProfile = new LoginProfile(signature, instanceCrypto)
            {
                Provider = ProviderConstants.Blockchain,
            };

            var linker = new AccountLinker("webstudio", signature, instanceCrypto, dbOptions, accountLinkerStorage);
            if (string.IsNullOrEmpty(account))
            {
                linker.RemoveLink(user.ID.ToString(), loginProfile);
            }
            else
            {
                loginProfile.Name = Crypto.GetV(account, 1, true);
                linker.AddLink(user.ID.ToString(), loginProfile);
            }
        }


        public static string GetAddress(SecurityContext securityContext, Signature signature, InstanceCrypto instanceCrypto, DbOptionsManager dbOptions, AccountLinkerStorage accountLinkerStorage)
        {
            return GetAddress(securityContext.CurrentAccount.ID, signature, instanceCrypto, dbOptions, accountLinkerStorage);
        }

        public static string GetAddress(Guid userId, Signature signature, InstanceCrypto instanceCrypto, DbOptionsManager dbOptions, AccountLinkerStorage accountLinkerStorage)
        {
            var linker = new AccountLinker("webstudio", signature, instanceCrypto, dbOptions, accountLinkerStorage);
            var profile = linker.GetLinkedProfiles(userId.ToString(), ProviderConstants.Blockchain).FirstOrDefault();
            if (profile == null) return null;

            var account = Crypto.GetV(profile.Name, 1, false);
            return account;
        }
    }
}