using CsQuery;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web;

namespace Jackett
{
    public class BitMeTV : IndexerInterface
    {
        class BmtvConfig : ConfigurationData
        {
            public StringItem Username { get; private set; }

            public StringItem Password { get; private set; }

            public ImageItem CaptchaImage { get; private set; }

            public StringItem CaptchaText { get; private set; }

            public BmtvConfig()
            {
                Username = new StringItem { Name = "Username" };
                Password = new StringItem { Name = "Password" };
                CaptchaImage = new ImageItem { Name = "Captcha Image" };
                CaptchaText = new StringItem { Name = "Captcha Text" };
            }

            public override Item[] GetItems()
            {
                return new Item[] { Username, Password, CaptchaImage, CaptchaText };
            }
        }

        static string BaseUrl = "http://www.bitmetv.org";
        static string LoginUrl = BaseUrl + "/login.php";
        static string LoginPost = BaseUrl + "/takelogin.php";
        static string CaptchaUrl = BaseUrl + "/visual.php";
        static string SearchUrl = BaseUrl + "/browse.php";

        CookieContainer cookies;
        HttpClientHandler handler;
        HttpClient client;

        public event Action<IndexerInterface, JToken> OnSaveConfigurationRequested;
        public event Action<IndexerInterface, string, Exception> OnResultParsingError;

        public BitMeTV()
        {
            IsConfigured = false;
            cookies = new CookieContainer();
            handler = new HttpClientHandler
            {
                CookieContainer = cookies,
                AllowAutoRedirect = true,
                UseCookies = true,
            };
            client = new HttpClient(handler);
        }

        public string DisplayName { get { return "BitMeTV"; } }

        public string DisplayDescription { get { return "TV Episode specialty tracker"; } }

        public Uri SiteLink { get { return new Uri(BaseUrl); } }

        public bool IsConfigured { get; private set; }

        public async Task<ConfigurationData> GetConfigurationForSetup()
        {
            await client.GetAsync(LoginUrl);
            var captchaImage = await client.GetByteArrayAsync(CaptchaUrl);
            var config = new BmtvConfig();
            config.CaptchaImage.Value = captchaImage;
            return (ConfigurationData)config;
        }

        public async Task ApplyConfiguration(JToken configJson)
        {
            var config = new BmtvConfig();
            config.LoadValuesFromJson(configJson);

            var pairs = new Dictionary<string, string> {
				{ "username", config.Username.Value },
				{ "password", config.Password.Value },
				{ "secimage", config.CaptchaText.Value }
			};

            var content = new FormUrlEncodedContent(pairs);

            var response = await client.PostAsync(LoginPost, content);
            var responseContent = await response.Content.ReadAsStringAsync();

            if (!responseContent.Contains("/logout.php"))
            {
                CQ dom = responseContent;
                var messageEl = dom["table tr > td.embedded > h2"].Last();
                var errorMessage = messageEl.Text();
                var captchaImage = await client.GetByteArrayAsync(CaptchaUrl);
                config.CaptchaImage.Value = captchaImage;
                config.CaptchaText.Value = "";
                throw new ExceptionWithConfigData(errorMessage, (ConfigurationData)config);
            }
            else
            {
                var configSaveData = new JObject();
                cookies.DumpToJson(SiteLink, configSaveData);

                if (OnSaveConfigurationRequested != null)
                    OnSaveConfigurationRequested(this, configSaveData);

                IsConfigured = true;
            }
        }

        public void LoadFromSavedConfiguration(JToken jsonConfig)
        {
            cookies.FillFromJson(new Uri(BaseUrl), jsonConfig);
            IsConfigured = true;
        }

        public async Task<ReleaseInfo[]> PerformQuery(TorznabQuery query)
        {
            List<ReleaseInfo> releases = new List<ReleaseInfo>();


            foreach (var title in query.ShowTitles ?? new string[] { string.Empty })
            {

                var searchString = title + " " + query.GetEpisodeSearchString();
                var episodeSearchUrl = string.Format("{0}?search={1}&cat=0", SearchUrl, HttpUtility.UrlEncode(searchString));
                var results = await client.GetStringAsync(episodeSearchUrl);
                try
                {
                    CQ dom = results;

                    var table = dom["tbody > tr > .latest"].Parent().Parent();

                    foreach (var row in table.Children().Skip(1))
                    {
                        var release = new ReleaseInfo();

                        CQ qDetailsCol = row.ChildElements.ElementAt(1).Cq();
                        CQ qLink = qDetailsCol.Children("a").First();

                        release.MinimumRatio = 1;
                        release.MinimumSeedTime = 172800;
                        release.Comments = new Uri(BaseUrl + "/" + qLink.Attr("href"));
                        release.Guid = release.Comments;
                        release.Title = qLink.Attr("title");
                        release.Description = release.Title;

                        //"Tuesday, June 11th 2013 at 03:52:53 AM" to...
                        //"Tuesday June 11 2013 03:52:53 AM"
                        var timestamp = qDetailsCol.Children("font").Text().Trim() + " ";
                        var timeParts = new List<string>(timestamp.Replace(" at", "").Replace(",", "").Split(' '));
                        timeParts[2] = Regex.Replace(timeParts[2], "[^0-9.]", "");
                        var formattedTimeString = string.Join(" ", timeParts.ToArray()).Trim();
                        var date = DateTime.ParseExact(formattedTimeString, "dddd MMMM d yyyy hh:mm:ss tt", CultureInfo.InvariantCulture);
                        release.PublishDate = DateTime.SpecifyKind(date, DateTimeKind.Utc).ToLocalTime();

                        release.Link = new Uri(BaseUrl + "/" + row.ChildElements.ElementAt(2).Cq().Children("a.index").Attr("href"));

                        var sizeCol = row.ChildElements.ElementAt(6);
                        var sizeVal = ParseUtil.CoerceFloat(sizeCol.ChildNodes[0].NodeValue);
                        var sizeUnit = sizeCol.ChildNodes[2].NodeValue;
                        release.Size = ReleaseInfo.GetBytes(sizeUnit, sizeVal);

                        release.Seeders = ParseUtil.CoerceInt(row.ChildElements.ElementAt(8).Cq().Text());
                        release.Peers = ParseUtil.CoerceInt(row.ChildElements.ElementAt(9).Cq().Text()) + release.Seeders;

                        //if (!release.Title.ToLower().Contains(title.ToLower()))
                        //    continue;

                        releases.Add(release);
                    }
                }
                catch (Exception ex)
                {
                    OnResultParsingError(this, results, ex);
                    throw ex;
                }
            }

            return releases.ToArray();

        }

        public Task<byte[]> Download(Uri link)
        {
            return client.GetByteArrayAsync(link);
        }

    }
}