using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using TweetSharp.Twitter;
using TweetSharp.Twitter.Model;
using TweetSharp.Twitter.Service;
using TweetSharp.Service;
using TweetSharp.Model;
using TweetSharp.Twitter.Fluent;
using TweetSharp.Extensions;
using TweetSharp.Twitter.Extensions;
using TweetSharp;
using System.Diagnostics;
using System.Xml.Serialization;
using System.Xml;
using System.Windows.Forms;
using System.IO;

namespace EchoChamber.Library
{
    public class TwitterScraper
    {
        public static TweetSet Scrape(string twit)
        {
            List<string> statusList = new List<string>();

            long lastTweetID = 0;
            TwitterService twitterService = EchoChamberHelper.GetAuthenticatedTwitter();
            for (int page = 1; page < 20; page++)
            {
                try
                {
                    IEnumerable<TwitterStatus> result = twitterService.ListTweetsOnSpecifiedUserTimeline(twit, page, 200);
                    if (result == null || result.Count() == 0)
                    {
                        break;
                    }

                    foreach (TwitterStatus status in result)
                    {
                        statusList.Add(status.Text);
                        lastTweetID = Math.Max(status.Id, lastTweetID); ;
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString(), twit);
                    break;
                }
            }

            TweetSet tweetSet = new TweetSet();
            tweetSet.Tweets = statusList;
            tweetSet.LastTweetID = lastTweetID;

            return tweetSet;
        }

        public static TweetSet Scrape(string twit, long lastTweetID)
        {
            List<string> statusList = new List<string>();

            TwitterService twitterService = EchoChamberHelper.GetAuthenticatedTwitter();
            IEnumerable<TwitterStatus> result = twitterService.ListTweetsOnSpecifiedUserTimelineSince(twit, lastTweetID, 200);
            if (result != null && result.Count() == 0)
            {
                foreach (TwitterStatus status in result)
                {
                    statusList.Add(status.Text);
                    lastTweetID = Math.Max(status.Id, lastTweetID);
                }
            }

            TweetSet tweetSet = new TweetSet();
            tweetSet.Tweets = statusList;
            tweetSet.LastTweetID = lastTweetID;

            return tweetSet;
        }

        public static string[] GetTwits()
        {
            //Service calls fail.  Hard code for time.
            return new string[]{"AndrewBreitbart", "ScottBrownMA", "TuckerCarlson", "MittRomney", "ewerickson", "gretawire", "hannityshow", "RepRonPaul", "EricCantor", "foxnews", "MicheleBachmann", "RedState", "marcorubio", "DanaPerino", "Bret_Baier", "GOPWhip", "oreillyfactor", "DinoRossiWA", "GovBrewer", "SarahPalinUSA", "CatoInstitute", "SenJohnMcCain", "GovMikeHuckabee", "glennbeck", "newtgingrich", "JimDeMint", "michellemalkin", "GOPLeader", "Whitman2010", "marklevinshow", "KarlRove", "Heritage", "Drudge_Report", "johnboehner", "seanhannity", "reasonmag", "CarlyforCA"};
            /*//Only handles 100 users for now.  Should be finefor Project needs.
            List<string> twits = new List<string>();
            TwitterService twitterService = EchoChamberHelper.GetAuthenticatedTwitter();
            TwitterCursorList<TwitterUser> twitList = twitterService.ListFriends();
            twits.AddRange(twitList.Select(x => x.ScreenName));
            return twits.ToArray();*/
        }

        public static void UpdateTweets(string twit)
        {
            Dictionary<string, TwitterState> stateTable = TwitterState.LoadState("twitterState.xml");
            if (stateTable.ContainsKey(twit))
            {
                TweetSet tweetSet = TwitterScraper.Scrape(twit, stateTable[twit].LastTweetID);
                stateTable[twit].LastTweetID = tweetSet.LastTweetID;

                string tweets = string.Join(Environment.NewLine, tweetSet.Tweets.ToArray());
                //Refudiate the punctuators.
                tweets = EchoChamberHelper.SanitizeTweets(tweets);

                Indexer indexer = Indexer.Load(twit + ".xml");
                indexer.Index(tweets);
                indexer.Save(twit + ".xml");

                File.AppendAllText(twit + ".txt", tweets);

            }
            else
            {
                stateTable[twit] = new TwitterState() { Twit = twit, LastTweetID = 0 };
                TweetSet tweetSet = TwitterScraper.Scrape(twit);

                stateTable[twit].LastTweetID = tweetSet.LastTweetID;

                string tweets = string.Join(Environment.NewLine, tweetSet.Tweets.ToArray());
                //Refudiate the punctuators.
                tweets = EchoChamberHelper.SanitizeTweets(tweets);

                Indexer indexer = new Indexer();
                indexer.Name = twit;
                indexer.Index(tweets);
                indexer.Save(twit + ".xml");

                File.AppendAllText(twit + ".txt", tweets);
            }
            TwitterState.SaveState("twitterState.xml", stateTable);
        }
        
        /*     
        //This Authorization Code won't work as-is.  You'll have to insert your application keys here.
        //It then saves clientinfo.xml and authtoken.xml for later use. I'm not checking those files in because they're secret.
        public static string OAUTH_CONSUMER_KEY = "Insert Here";
        public static string OAUTH_CONSUMER_SECRET = "Insert Here";

        public static void Authorize()
        {
            TwitterClientInfo info = new TwitterClientInfo();
            info.ConsumerKey = OAUTH_CONSUMER_KEY;
            info.ConsumerSecret = OAUTH_CONSUMER_SECRET;

            XmlSerializer infoSerializer = new XmlSerializer(typeof(TwitterClientInfo));
            using (XmlWriter writer = XmlWriter.Create("clientinfo.xml"))
            {
                infoSerializer.Serialize(writer, info);
            }

            var service = new TwitterService(info);

            OAuthToken requestToken = service.GetRequestToken();

            String AuthURL = service.GetAuthorizationUrl(requestToken);

            Process.Start(AuthURL); // Launch browser with authorization URL.
            MessageBox.Show("Answer the question in the browser window and copy the pin on the clipboard, click ok when ready");

            String Pin = Clipboard.GetText(TextDataFormat.Text);

            OAuthToken accessToken = service.GetAccessToken(requestToken, Pin);

            service.AuthenticateWith(accessToken.Token, accessToken.TokenSecret);

            XmlSerializer authSerializer = new XmlSerializer(typeof(OAuthToken));
            using (XmlWriter writer = XmlWriter.Create("authtoken.xml"))
            {
                authSerializer.Serialize(writer, accessToken);
            }

            if (service.Error == null)
            {
                service.SendTweet("Access Granted.  Carry On.");
            }
        }*/
    }

    public class TweetSet
    {
        public List<string> Tweets { get; set; }
        public long LastTweetID { get; set; }
    }

    public class TwitterState
    {
        public string Twit { get; set; }
        public long LastTweetID { get; set; }

        public static Dictionary<string, TwitterState> LoadState(string filename)
        {
            if (!File.Exists(filename))
            {
                return new Dictionary<string, TwitterState>();
            }

            List<TwitterState> stateList = EchoChamberHelper.Deserialize<List<TwitterState>>(filename);
            Dictionary<string, TwitterState> stateTable = new Dictionary<string, TwitterState>();
            stateList.ForEach(x => stateTable[x.Twit] = x);
            return stateTable;
        }

        public static void SaveState(string filename, Dictionary<string, TwitterState> stateTable)
        {
            List<TwitterState> stateList = stateTable.Values.ToList();
            EchoChamberHelper.Serialize(filename, stateList);
        }
    }
}