// (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


//using System;
//using System.Collections.Generic;
//using System.Globalization;
//using System.Web;

//using ASC.FederatedLogin.Profile;

//using Newtonsoft.Json.Linq;

//using Tweetinvi;
//using Tweetinvi.Auth;
//using Tweetinvi.Parameters;

//namespace ASC.FederatedLogin.LoginProviders
//{
//    public class TwitterLoginProvider : BaseLoginProvider<TwitterLoginProvider>
//    {
//        public static string TwitterKey { get { return Instance.ClientID; } }
//        public static string TwitterSecret { get { return Instance.ClientSecret; } }
//        public static string TwitterDefaultAccessToken { get { return Instance["twitterAccessToken_Default"]; } }
//        public static string TwitterAccessTokenSecret { get { return Instance["twitterAccessTokenSecret_Default"]; } }

//        public override string AccessTokenUrl { get { return "https://api.twitter.com/oauth/access_token"; } }
//        public override string RedirectUri { get { return this["twitterRedirectUrl"]; } }
//        public override string ClientID { get { return this["twitterKey"]; } }
//        public override string ClientSecret { get { return this["twitterSecret"]; } }
//        public override string CodeUrl { get { return "https://api.twitter.com/oauth/request_token"; } }

//        private static readonly IAuthenticationRequestStore _myAuthRequestStore = new LocalAuthenticationRequestStore();

//        public override bool IsEnabled
//        {
//            get
//            {
//                return !string.IsNullOrEmpty(ClientID) &&
//                       !string.IsNullOrEmpty(ClientSecret);
//            }
//        }

//        public TwitterLoginProvider() { }
//        public TwitterLoginProvider(string name, int order, Dictionary<string, string> props, Dictionary<string, string> additional = null) : base(name, order, props, additional) { }

//        public override LoginProfile ProcessAuthoriztion(HttpContext context, IDictionary<string, string> @params)
//        {
//            if (!string.IsNullOrEmpty(context.Request["denied"]))
//            {
//                return LoginProfile.FromError(new Exception("Canceled at provider"));
//            }

//            var appClient = new TwitterClient(TwitterKey, TwitterSecret);

//            if (string.IsNullOrEmpty(context.Request["oauth_token"]))
//            {
//                var callbackAddress = new UriBuilder(RedirectUri)
//                {
//                    Query = "state=" + HttpUtility.UrlEncode(context.Request.GetUrlRewriter().AbsoluteUri)
//                };

//                var authenticationRequestId = Guid.NewGuid().ToString();

//                // Add the user identifier as a query parameters that will be received by `ValidateTwitterAuth`
//                var redirectURL = _myAuthRequestStore.AppendAuthenticationRequestIdToCallbackUrl(callbackAddress.ToString(), authenticationRequestId);

//                // Initialize the authentication process
//                var authenticationRequestToken = appClient.Auth.RequestAuthenticationUrlAsync(redirectURL)
//                                       .ConfigureAwait(false)
//                                       .GetAwaiter()
//                                       .GetResult();

//                // Store the token information in the store
//                _myAuthRequestStore.AddAuthenticationTokenAsync(authenticationRequestId, authenticationRequestToken)
//                                       .ConfigureAwait(false)
//                                       .GetAwaiter()
//                                       .GetResult();

//                context.Response.Redirect(authenticationRequestToken.AuthorizationURL, true);

//                return null;
//            }

//            // Extract the information from the redirection url
//            var requestParameters = RequestCredentialsParameters.FromCallbackUrlAsync(context.Request.RawUrl, _myAuthRequestStore).GetAwaiter().GetResult();
//            // Request Twitter to generate the credentials.
//            var userCreds = appClient.Auth.RequestCredentialsAsync(requestParameters)
//                                       .ConfigureAwait(false)
//                                       .GetAwaiter()
//                                       .GetResult();

//            // Congratulations the user is now authenticated!
//            var userClient = new TwitterClient(userCreds);

//            var user = userClient.Users.GetAuthenticatedUserAsync()
//                                       .ConfigureAwait(false)
//                                       .GetAwaiter()
//                                       .GetResult();

//            var userSettings = userClient.AccountSettings.GetAccountSettingsAsync()
//                                       .ConfigureAwait(false)
//                                       .GetAwaiter()
//                                       .GetResult();

//            return user == null
//                       ? null
//                       : new LoginProfile
//                       {
//                           Name = user.Name,
//                           DisplayName = user.ScreenName,
//                           Avatar = user.ProfileImageUrl,
//                           Locale = userSettings.Language.ToString(),
//                           Id = user.Id.ToString(CultureInfo.InvariantCulture),
//                           Provider = ProviderConstants.Twitter
//                       };

//        }

//        protected override OAuth20Token Auth(HttpContext context, string scopes, Dictionary<string, string> additional = null)
//        {
//            throw new NotImplementedException();
//        }

//        public override LoginProfile GetLoginProfile(string accessToken)
//        {
//            throw new NotImplementedException();
//        }

//        internal static LoginProfile ProfileFromTwitter(string twitterProfile)
//        {
//            var jProfile = JObject.Parse(twitterProfile);
//            if (jProfile == null) throw new Exception("Failed to correctly process the response");

//            return new LoginProfile
//            {
//                DisplayName = jProfile.Value<string>("name"),
//                Locale = jProfile.Value<string>("lang"),
//                Id = jProfile.Value<string>("id"),
//                Provider = ProviderConstants.Twitter
//            };
//        }
//    }
//}