using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using AngleSharp.Dom;
using AngleSharp.Html.Parser;
using Jackett.Common.Models;
using Jackett.Common.Models.IndexerConfig;
using Jackett.Common.Services.Interfaces;
using Jackett.Common.Utils;
using Jackett.Common.Utils.Clients;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using NLog;

namespace Jackett.Common.Indexers.Abstract
{
    public abstract class AvistazTracker : BaseWebIndexer
    {
        private string LoginUrl => SiteLink + "auth/login";
        private string SearchUrl => SiteLink + "torrents?";
        private string IMDBSearch => SiteLink + "ajax/movies/3?term=";
        private readonly Regex _catRegex = new Regex(@"\s+fa\-([a-z]+)\s+", RegexOptions.IgnoreCase);
        private readonly HashSet<string> _hdResolutions = new HashSet<string> { "1080p", "1080i", "720p" };

        private new ConfigurationDataBasicLogin configData => (ConfigurationDataBasicLogin)base.configData;

        // hook to adjust the search term
        protected virtual string GetSearchTerm(TorznabQuery query) => $"{query.SearchTerm} {query.GetEpisodeSearchString()}";

        protected AvistazTracker(string name, string link, string description, IIndexerConfigurationService configService,
                                 WebClient client, Logger logger, IProtectionService p, TorznabCapabilities caps)
            : base(name,
                   description: description,
                   link: link,
                   caps: caps,
                   configService: configService,
                   client: client,
                   logger: logger,
                   p: p,
                   configData: new ConfigurationDataBasicLogin())
        {
            Encoding = Encoding.UTF8;
            Language = "en-us";

            AddCategoryMapping(1, TorznabCatType.Movies);
            AddCategoryMapping(1, TorznabCatType.MoviesUHD);
            AddCategoryMapping(1, TorznabCatType.MoviesHD);
            AddCategoryMapping(1, TorznabCatType.MoviesSD);
            AddCategoryMapping(2, TorznabCatType.TV);
            AddCategoryMapping(2, TorznabCatType.TVUHD);
            AddCategoryMapping(2, TorznabCatType.TVHD);
            AddCategoryMapping(2, TorznabCatType.TVSD);
            AddCategoryMapping(3, TorznabCatType.Audio);
        }

        public override async Task<IndexerConfigurationStatus> ApplyConfiguration(JToken configJson)
        {
            LoadValuesFromJson(configJson);
            var loginPage = await RequestStringWithCookies(LoginUrl, string.Empty);
            var token = new Regex("<meta name=\"_token\" content=\"(.*?)\">").Match(loginPage.Content).Groups[1].ToString();
            var pairs = new Dictionary<string, string> {
                { "_token", token },
                { "email_username", configData.Username.Value },
                { "password", configData.Password.Value },
                { "remember", "1" }
            };

            var result = await RequestLoginAndFollowRedirect(LoginUrl, pairs, loginPage.Cookies, true, null, LoginUrl);
            await ConfigureIfOK(result.Cookies, result.Content != null && result.Content.Contains("auth/logout"), () =>
            {
                var parser = new HtmlParser();
                var dom = parser.ParseDocument(result.Content);
                var messageEl = dom.QuerySelector(".form-error");
                var errorMessage = messageEl.Text().Trim();
                throw new ExceptionWithConfigData(errorMessage, configData);
            });

            return IndexerConfigurationStatus.RequiresTesting;
        }

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

            var categoryMapping = MapTorznabCapsToTrackers(query).Distinct().ToList();
            var qc = new List<KeyValuePair<string, string>> // NameValueCollection don't support cat[]=19&cat[]=6
            {
                {"in", "1"},
                {"type", categoryMapping.Any() ? categoryMapping.First() : "0"} // type=0 => all categories
            };

            // resolution filter to improve the search
            if (!query.Categories.Contains(TorznabCatType.Movies.ID) && !query.Categories.Contains(TorznabCatType.TV.ID) &&
                !query.Categories.Contains(TorznabCatType.Audio.ID))
            {
                if (query.Categories.Contains(TorznabCatType.MoviesUHD.ID) || query.Categories.Contains(TorznabCatType.TVUHD.ID))
                    qc.Add("video_quality[]", "6"); // 2160p
                if (query.Categories.Contains(TorznabCatType.MoviesHD.ID) || query.Categories.Contains(TorznabCatType.TVHD.ID))
                {
                    qc.Add("video_quality[]", "2"); // 720p
                    qc.Add("video_quality[]", "7"); // 1080i
                    qc.Add("video_quality[]", "3"); // 1080p
                }
                if (query.Categories.Contains(TorznabCatType.MoviesSD.ID) || query.Categories.Contains(TorznabCatType.TVSD.ID))
                    qc.Add("video_quality[]", "1"); // SD
            }

            // imdb search
            if (query.IsImdbQuery)
            {
                var movieId = await GetMovieId(query.ImdbID);
                if (movieId == null)
                    return releases; // movie not found or service broken => return 0 results
                qc.Add("movie_id", movieId);
            }
            else
                qc.Add("search", GetSearchTerm(query).Trim());

            var episodeSearchUrl = SearchUrl + qc.GetQueryString();
            var response = await RequestStringWithCookiesAndRetry(episodeSearchUrl);
            if (response.IsRedirect)
            {
                // re-login
                await ApplyConfiguration(null);
                response = await RequestStringWithCookiesAndRetry(episodeSearchUrl);
            }

            try
            {
                var parser = new HtmlParser();
                var dom = parser.ParseDocument(response.Content);
                var rows = dom.QuerySelectorAll("table:has(thead) > tbody > tr");
                foreach (var row in rows)
                {
                    var release = new ReleaseInfo
                    {
                        MinimumRatio = 1,
                        MinimumSeedTime = 172800 // 48 hours
                    };

                    var qLink = row.QuerySelector("a.torrent-filename");
                    release.Title = qLink.Text().Trim();
                    release.Comments = new Uri(qLink.GetAttribute("href"));
                    release.Guid = release.Comments;

                    var qDownload = row.QuerySelector("a.torrent-download-icon");
                    release.Link = new Uri(qDownload.GetAttribute("href"));

                    var qBanner = row.QuerySelector("img.img-tor-poster")?.GetAttribute("data-poster-mid");
                    if (qBanner != null)
                        release.BannerUrl = new Uri(qBanner);

                    var dateStr = row.QuerySelector("td:nth-of-type(4) > span").Text().Trim();
                    release.PublishDate = DateTimeUtil.FromTimeAgo(dateStr);

                    var sizeStr = row.QuerySelector("td:nth-of-type(6) > span").Text().Trim();
                    release.Size = ReleaseInfo.GetBytes(sizeStr);

                    release.Seeders = ParseUtil.CoerceInt(row.QuerySelector("td:nth-of-type(7)").Text().Trim());
                    release.Peers = ParseUtil.CoerceInt(row.QuerySelector("td:nth-of-type(8)").Text().Trim()) + release.Seeders;

                    var resolution = row.QuerySelector("span.badge-extra")?.TextContent.Trim();
                    var catMatch = _catRegex.Match(row.QuerySelectorAll("td:nth-of-type(1) i").First().GetAttribute("class"));
                    var cats = new List<int>();
                    switch(catMatch.Groups[1].Value)
                    {
                        case "film":
                            if (query.Categories.Contains(TorznabCatType.Movies.ID))
                                cats.Add(TorznabCatType.Movies.ID);
                            cats.Add(resolution switch
                            {
                                var res when _hdResolutions.Contains(res) => TorznabCatType.MoviesHD.ID,
                                "2160p" => TorznabCatType.MoviesUHD.ID,
                                _ => TorznabCatType.MoviesSD.ID
                            });
                            break;
                        case "tv":
                            if (query.Categories.Contains(TorznabCatType.TV.ID))
                                cats.Add(TorznabCatType.TV.ID);
                            cats.Add(resolution switch
                            {
                                var res when _hdResolutions.Contains(res) => TorznabCatType.TVHD.ID,
                                "2160p" => TorznabCatType.TVUHD.ID,
                                _ => TorznabCatType.TVSD.ID
                            });
                            break;
                        case "music":
                            cats.Add(TorznabCatType.Audio.ID);
                            break;
                        default:
                            throw new Exception("Error parsing category!");
                    }
                    release.Category = cats;

                    var grabs = row.QuerySelector("td:nth-child(9)").Text();
                    release.Grabs = ParseUtil.CoerceInt(grabs);

                    if (row.QuerySelectorAll("i.fa-star").Any())
                        release.DownloadVolumeFactor = 0;
                    else if (row.QuerySelectorAll("i.fa-star-half-o").Any())
                        release.DownloadVolumeFactor = 0.5;
                    else
                        release.DownloadVolumeFactor = 1;

                    release.UploadVolumeFactor = row.QuerySelectorAll("i.fa-diamond").Any() ? 2 : 1;

                    releases.Add(release);
                }
            }
            catch (Exception ex)
            {
                OnParseError(response.Content, ex);
            }
            return releases;
        }

        private async Task<string> GetMovieId(string imdbId)
        {
            try
            {
                var imdbUrl = IMDBSearch + imdbId;
                var imdbHeaders = new Dictionary<string, string> { { "X-Requested-With", "XMLHttpRequest" } };
                var imdbResponse = await RequestStringWithCookiesAndRetry(imdbUrl, null, null, imdbHeaders);
                if (imdbResponse.IsRedirect)
                {
                    // re-login
                    await ApplyConfiguration(null);
                    imdbResponse = await RequestStringWithCookiesAndRetry(imdbUrl, null, null, imdbHeaders);
                }
                var json = JsonConvert.DeserializeObject<dynamic>(imdbResponse.Content);
                return (string)((JArray)json["data"])[0]["id"];
            }
            catch (Exception)
            {
                return null;
            }
        }
    }
}