using System;
using System.Text.RegularExpressions;
using System.Threading;
using MahApps.RESTBase;
using MahApps.Twitter;
using MahApps.Twitter.Models;
using MahTweets.Mango.Core.ActionResults;
using MahTweets.Mango.Core.Models;
using MahTweets.Mango.Core.Repositories;
using WindowsPhoneEssentials.Tasks;
using WindowsPhoneEssentials.Threading;
using WindowsPhoneMVC;
using WindowsPhoneMVC.ActionResults;
using WindowsPhoneMVC.Navigation;

namespace MahTweets.Extensions.Twitter.Mango.Controllers
{
    public class TwitterController : Controller
    {
        private readonly ITaskManager _taskManager;
        private readonly IAccountRepository _accountRepository;
        private const string ConsumerKey = "NRvCz7KI8MRodk2E28Dmg";
        private const string ConsumerSecret = "4Pm8OlyWRUmuWmG25t7yhbtoUW4A9V0CA4XO8tvg";

        public TwitterController(ITaskManager taskManager, IAccountRepository accountRepository)
        {
            _taskManager = taskManager;
            _accountRepository = accountRepository;
        }

        public ActionResult NewAccount()
        {
            var twitterClient = new TwitterClient(ConsumerKey, ConsumerSecret, "http://www.mahtweets.com/mobile_oauth.html");

            //Possibly think about how to create a async MVC navigation so you call NavigationComplete() to finish the navigation in a callback?

            var sync = new ManualResetEvent(false);
            string oauthUrl = null;
            twitterClient.BeginGetRequestUrl((request, response, url)=>
                                                 {
                                                     oauthUrl = url;
                                                     sync.Set();
                                                 });

            if (!sync.WaitOne(10000))
                return this.Toast("Timeout", "Timed out getting oAuth URL");

            Execute.OnUIThread(()=> _taskManager.ShowWebsiteInApp(oauthUrl, false, 
                (uri, ns)=>
                    {
                        if (!uri.AbsoluteUri.Contains("mahtweets.com")) return;
                        ns.GoBack();
                        NavigationContext.Navigator.NavigateTo<TwitterController>("NewAccount", uri, twitterClient);
                    }));

            return Nothing();
        }

        public ActionResult NewAccount(Uri oAuthUri, TwitterClient twitterClient)
        {
            var r = new Regex("oauth_token=([^&.]*)&oauth_verifier=([^&.]*)");
            var match = r.Match(oAuthUri.AbsoluteUri);

            if (!match.Success)
                return this.Toast("Error", "Twitter setup cancelled or failed");

            Credentials tokens = null; 
            var sync = new ManualResetEvent(false);
            twitterClient.BeginGetAccessToken(oAuthUri, (request, response, t) =>
                                                            {
                                                                tokens = t;
                                                                twitterClient.SetOAuthToken(t);
                                                                sync.Set();
                                                            });
            if (!sync.WaitOne(10000))
                return this.Toast("Timeout", "Timed out getting access tokens");

            sync.Reset();
            object user = null;
            twitterClient.Account.BeginVerifyCredentials((req, res, o)=>
                                                             {
                                                                 user = o;
                                                                 sync.Set();
                                                             });

            if (!sync.WaitOne(10000))
                return this.Toast("Timeout", "Timed out verifying credentials");

            if (user is User && !string.IsNullOrEmpty(((User)user).Name))
            {
                var u = (User)user;
                _accountRepository.NewAccount(new AccountCredentials
                {
                    AccountName = u.ScreenName,
                    Username = tokens.OAuthToken,
                    Password = tokens.OAuthTokenSecret,
                    Protocol = "twitter",
                    AccountId = u.Id.ToString()
                });

                return RefreshCurrentView();
            }

            return this.Toast("Error", "Twitter setup cancelled or failed");
        }
    }
}