using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using AngleSharp.Html.Parser;
using Jackett.Common.Models;
using Jackett.Common.Models.IndexerConfig;
using Jackett.Common.Services.Interfaces;
using Jackett.Common.Utils;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using NLog;
using static Jackett.Common.Models.IndexerConfig.ConfigurationData;

namespace Jackett.Common.Indexers
{
    [ExcludeFromCodeCoverage]
    public class TorrentLeech : BaseWebIndexer
    {
        private string LoginUrl => SiteLink + "user/account/login/";
        private string SearchUrl => SiteLink + "torrents/browse/list/";
        private new ConfigurationDataBasicLogin configData => (ConfigurationDataBasicLogin)base.configData;

        public override string[] LegacySiteLinks { get; protected set; } =
        {
            "https://v4.torrentleech.org/"
        };

        public TorrentLeech(IIndexerConfigurationService configService, Utils.Clients.WebClient wc, Logger l,
            IProtectionService ps, ICacheService cs)
            : base(id: "torrentleech",
                   name: "TorrentLeech",
                   description: "This is what happens when you seed",
                   link: "https://www.torrentleech.org/",
                   caps: new TorznabCapabilities
                   {
                       TvSearchParams = new List<TvSearchParam>
                       {
                           TvSearchParam.Q, TvSearchParam.Season, TvSearchParam.Ep, TvSearchParam.ImdbId
                       },
                       MovieSearchParams = new List<MovieSearchParam>
                       {
                           MovieSearchParam.Q, MovieSearchParam.ImdbId
                       },
                       MusicSearchParams = new List<MusicSearchParam>
                       {
                           MusicSearchParam.Q
                       },
                       BookSearchParams = new List<BookSearchParam>
                       {
                           BookSearchParam.Q
                       }
                   },
                   configService: configService,
                   client: wc,
                   logger: l,
                   p: ps,
                   cacheService: cs,
                   configData: new ConfigurationDataBasicLogin(
                       "For best results, change the 'Default Number of Torrents per Page' setting to 100 in your Profile."))
        {
            Encoding = Encoding.UTF8;
            Language = "en-us";
            Type = "private";

            configData.AddDynamic("freeleech", new BoolConfigurationItem("Search freeleech only") { Value = false });

            AddCategoryMapping(1, TorznabCatType.Movies, "Movies");
            AddCategoryMapping(8, TorznabCatType.MoviesSD, "Movies Cam");
            AddCategoryMapping(9, TorznabCatType.MoviesSD, "Movies TS/TC");
            AddCategoryMapping(11, TorznabCatType.MoviesSD, "Movies DVDRip/DVDScreener");
            AddCategoryMapping(12, TorznabCatType.MoviesDVD, "Movies DVD-R");
            AddCategoryMapping(13, TorznabCatType.MoviesBluRay, "Movies Bluray");
            AddCategoryMapping(14, TorznabCatType.MoviesHD, "Movies BlurayRip");
            AddCategoryMapping(15, TorznabCatType.Movies, "Movies Boxsets");
            AddCategoryMapping(29, TorznabCatType.TVDocumentary, "Documentaries");
            AddCategoryMapping(47, TorznabCatType.MoviesUHD, "Movies 4K");
            AddCategoryMapping(36, TorznabCatType.MoviesForeign, "Movies Foreign");
            AddCategoryMapping(37, TorznabCatType.MoviesWEBDL, "Movies WEBRip");
            AddCategoryMapping(43, TorznabCatType.MoviesHD, "Movies HDRip");

            AddCategoryMapping(2, TorznabCatType.TV, "TV");
            AddCategoryMapping(26, TorznabCatType.TVSD, "TV Episodes");
            AddCategoryMapping(27, TorznabCatType.TV, "TV Boxsets");
            AddCategoryMapping(32, TorznabCatType.TVHD, "TV Episodes HD");
            AddCategoryMapping(44, TorznabCatType.TVForeign, "TV Foreign");

            AddCategoryMapping(3, TorznabCatType.PCGames, "Games");
            AddCategoryMapping(17, TorznabCatType.PCGames, "Games PC");
            AddCategoryMapping(18, TorznabCatType.ConsoleXBox, "Games XBOX");
            AddCategoryMapping(19, TorznabCatType.ConsoleXBox360, "Games XBOX360");
            AddCategoryMapping(40, TorznabCatType.ConsoleXBoxOne, "Games XBOXONE");
            AddCategoryMapping(20, TorznabCatType.ConsolePS3, "Games PS2");
            AddCategoryMapping(21, TorznabCatType.ConsolePS3, "Games Mac");
            AddCategoryMapping(22, TorznabCatType.ConsolePSP, "Games PSP");
            AddCategoryMapping(28, TorznabCatType.ConsoleWii, "Games Wii");
            AddCategoryMapping(30, TorznabCatType.ConsoleNDS, "Games Nintendo DS");
            AddCategoryMapping(39, TorznabCatType.ConsolePS4, "Games PS4");
            AddCategoryMapping(42, TorznabCatType.PCMac, "Games Mac");
            AddCategoryMapping(48, TorznabCatType.ConsoleOther, "Games Nintendo Switch");

            AddCategoryMapping(4, TorznabCatType.Audio, "Music");
            AddCategoryMapping(16, TorznabCatType.AudioVideo, "Music videos");
            AddCategoryMapping(31, TorznabCatType.Audio, "Audio");

            AddCategoryMapping(7, TorznabCatType.TV, "Animation");
            AddCategoryMapping(34, TorznabCatType.TVAnime, "TV Anime");
            AddCategoryMapping(35, TorznabCatType.TV, "TV Cartoons");

            AddCategoryMapping(5, TorznabCatType.Books, "Books");
            AddCategoryMapping(45, TorznabCatType.BooksEBook, "Books EBooks");
            AddCategoryMapping(46, TorznabCatType.BooksComics, "Books Comics");

            AddCategoryMapping(6, TorznabCatType.PC, "Apps");
            AddCategoryMapping(23, TorznabCatType.PCISO, "PC ISO");
            AddCategoryMapping(24, TorznabCatType.PCMac, "PC Mac");
            AddCategoryMapping(25, TorznabCatType.PCMobileOther, "PC Mobile");
            AddCategoryMapping(33, TorznabCatType.PC0day, "PC 0-day");
            AddCategoryMapping(38, TorznabCatType.Other, "Education");
        }

        public override async Task<IndexerConfigurationStatus> ApplyConfiguration(JToken configJson)
        {
            LoadValuesFromJson(configJson);
            await DoLogin();
            return IndexerConfigurationStatus.RequiresTesting;
        }

        private async Task DoLogin()
        {
            var pairs = new Dictionary<string, string> {
                { "username", configData.Username.Value },
                { "password", configData.Password.Value }
            };

            var result = await RequestLoginAndFollowRedirect(LoginUrl, pairs, null, true, null, LoginUrl);
            await ConfigureIfOK(result.Cookies, result.ContentString != null && result.ContentString.Contains("/user/account/logout"), () =>
            {
                var parser = new HtmlParser();
                var dom = parser.ParseDocument(result.ContentString);
                var errorMessage = dom.QuerySelector("p.text-danger:contains(\"Error:\")").TextContent.Trim();
                throw new ExceptionWithConfigData(errorMessage, configData);
            });
        }

        protected override async Task<IEnumerable<ReleaseInfo>> PerformQuery(TorznabQuery query)
        {
            var releases = new List<ReleaseInfo>();

            // remove dashes at the beginning of keywords as they exclude search strings (see issue #3096)
            var searchString = query.GetQueryString();
            searchString = Regex.Replace(searchString, @"(^|\s)-", " ");

            var searchUrl = SearchUrl;

            if (((BoolConfigurationItem)configData.GetDynamic("freeleech")).Value)
                searchUrl += "facets/tags%3AFREELEECH/";

            if (query.IsImdbQuery)
                searchUrl += "imdbID/" + query.ImdbID + "/";
            else if (!string.IsNullOrWhiteSpace(searchString))
                searchUrl += "exact/1/query/" + WebUtility.UrlEncode(searchString) + "/";

            var cats = MapTorznabCapsToTrackers(query);
            if (cats.Count > 0)
                searchUrl += "categories/" + string.Join(",", cats);
            else
                searchUrl += "newfilter/2"; // include 0day and music

            var results = await RequestWithCookiesAndRetryAsync(searchUrl);

            if (results.ContentString.Contains("/user/account/login")) // re-login
            {
                await DoLogin();
                results = await RequestWithCookiesAndRetryAsync(searchUrl);
            }

            try
            {
                var rows = (JArray)((JObject)JsonConvert.DeserializeObject(results.ContentString))["torrentList"];
                foreach (var row in rows)
                {
                    var title = row["name"].ToString();
                    if (!query.MatchQueryStringAND(title))
                        continue;

                    var torrentId = row["fid"].ToString();
                    var details = new Uri(SiteLink + "torrent/" + torrentId);
                    var link = new Uri(SiteLink + "download/" + torrentId + "/" + row["filename"]);
                    var publishDate = DateTime.ParseExact(row["addedTimestamp"].ToString(), "yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture);
                    var seeders = (int)row["seeders"];

                    // freeleech #6579 #6624 #7367
                    var dlMultiplier = row["download_multiplier"].ToString();
                    var dlVolumeFactor = string.IsNullOrEmpty(dlMultiplier) ? 1 : ParseUtil.CoerceInt(dlMultiplier);

                    var release = new ReleaseInfo
                    {
                        Title = title,
                        Details = details,
                        Guid = details,
                        Link = link,
                        PublishDate = publishDate,
                        Category = MapTrackerCatToNewznab(row["categoryID"].ToString()),
                        Size = (long)row["size"],
                        Grabs = (int)row["completed"],
                        Seeders = seeders,
                        Peers = seeders + (int)row["leechers"],
                        Imdb = ParseUtil.GetImdbID(row["imdbID"].ToString()),
                        UploadVolumeFactor = 1,
                        DownloadVolumeFactor = dlVolumeFactor,
                        MinimumRatio = 1,
                        MinimumSeedTime = 864000 // 10 days for registered users, less for upgraded users
                    };

                    releases.Add(release);
                }
            }
            catch (Exception ex)
            {
                OnParseError(results.ContentString, ex);
            }

            return releases;
        }
    }
}