#region Copyright
// /************************************************************************
//    Copyright (c) 2016 Jamie Rees
//    File: SearchModule.cs
//    Created By: Jamie Rees
//   
//    Permission is hereby granted, free of charge, to any person obtaining
//    a copy of this software and associated documentation files (the
//    "Software"), to deal in the Software without restriction, including
//    without limitation the rights to use, copy, modify, merge, publish,
//    distribute, sublicense, and/or sell copies of the Software, and to
//    permit persons to whom the Software is furnished to do so, subject to
//    the following conditions:
//   
//    The above copyright notice and this permission notice shall be
//    included in all copies or substantial portions of the Software.
//   
//    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
//    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
//    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
//    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
//    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
//    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
//    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//  ************************************************************************/
#endregion
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;

using Nancy;
using Nancy.Responses.Negotiation;

using NLog;

using PlexRequests.Api;
using PlexRequests.Api.Interfaces;
using PlexRequests.Api.Models.Music;
using PlexRequests.Core;
using PlexRequests.Core.SettingModels;
using PlexRequests.Helpers;
using PlexRequests.Services.Interfaces;
using PlexRequests.Services.Notification;
using PlexRequests.Store;
using PlexRequests.UI.Helpers;
using PlexRequests.UI.Models;
using System.Threading.Tasks;

using Nancy.Extensions;

using Newtonsoft.Json;

using PlexRequests.Api.Models.Sonarr;
using PlexRequests.Api.Models.Tv;
using PlexRequests.Core.Models;
using PlexRequests.Helpers.Analytics;
using PlexRequests.Store.Models;
using PlexRequests.Store.Repository;

using TMDbLib.Objects.General;
using TMDbLib.Objects.Search;

using Action = PlexRequests.Helpers.Analytics.Action;
using EpisodesModel = PlexRequests.Store.EpisodesModel;

namespace PlexRequests.UI.Modules
{
    public class SearchModule : BaseAuthModule
    {
        public SearchModule(ICacheProvider cache, ISettingsService<CouchPotatoSettings> cpSettings,
            ISettingsService<PlexRequestSettings> prSettings, IAvailabilityChecker checker,
            IRequestService request, ISonarrApi sonarrApi, ISettingsService<SonarrSettings> sonarrSettings,
            ISettingsService<SickRageSettings> sickRageService, ICouchPotatoApi cpApi, ISickRageApi srApi,
            INotificationService notify, IMusicBrainzApi mbApi, IHeadphonesApi hpApi, ISettingsService<HeadphonesSettings> hpService,
            ICouchPotatoCacher cpCacher, ISonarrCacher sonarrCacher, ISickRageCacher sickRageCacher, IPlexApi plexApi,
            ISettingsService<PlexSettings> plexService, ISettingsService<AuthenticationSettings> auth, IRepository<UsersToNotify> u, ISettingsService<EmailNotificationSettings> email,
            IIssueService issue, IAnalytics a, IRepository<RequestLimit> rl) : base("search", prSettings)
        {
            Auth = auth;
            PlexService = plexService;
            PlexApi = plexApi;
            CpService = cpSettings;
            PrService = prSettings;
            MovieApi = new TheMovieDbApi();
            Cache = cache;
            Checker = checker;
            CpCacher = cpCacher;
            SonarrCacher = sonarrCacher;
            SickRageCacher = sickRageCacher;
            RequestService = request;
            SonarrApi = sonarrApi;
            SonarrService = sonarrSettings;
            CouchPotatoApi = cpApi;
            SickRageService = sickRageService;
            SickrageApi = srApi;
            NotificationService = notify;
            MusicBrainzApi = mbApi;
            HeadphonesApi = hpApi;
            HeadphonesService = hpService;
            UsersToNotifyRepo = u;
            EmailNotificationSettings = email;
            IssueService = issue;
            Analytics = a;
            RequestLimitRepo = rl;
            TvApi = new TvMazeApi();


            Get["SearchIndex", "/", true] = async (x, ct) => await RequestLoad();

            Get["movie/{searchTerm}", true] = async (x, ct) => await SearchMovie((string)x.searchTerm);
            Get["tv/{searchTerm}", true] = async (x, ct) => await SearchTvShow((string)x.searchTerm);
            Get["music/{searchTerm}", true] = async (x, ct) => await SearchMusic((string)x.searchTerm);
            Get["music/coverArt/{id}"] = p => GetMusicBrainzCoverArt((string)p.id);

            Get["movie/upcoming", true] = async (x, ct) => await UpcomingMovies();
            Get["movie/playing", true] = async (x, ct) => await CurrentlyPlayingMovies();

            Post["request/movie", true] = async (x, ct) => await RequestMovie((int)Request.Form.movieId);
            Post["request/tv", true] = async (x, ct) => await RequestTvShow((int)Request.Form.tvId, (string)Request.Form.seasons);
            Post["request/tvEpisodes", true] = async (x, ct) => await RequestTvShow(0, "episode");
            Post["request/album", true] = async (x, ct) => await RequestAlbum((string)Request.Form.albumId);

            Post["/notifyuser", true] = async (x, ct) => await NotifyUser((bool)Request.Form.notify);
            Get["/notifyuser", true] = async (x, ct) => await GetUserNotificationSettings();

            Get["/seasons"] = x => GetSeasons();
            Get["/episodes", true] = async (x, ct) => await GetEpisodes();
        }
        private TvMazeApi TvApi { get; }
        private IPlexApi PlexApi { get; }
        private TheMovieDbApi MovieApi { get; }
        private INotificationService NotificationService { get; }
        private ICouchPotatoApi CouchPotatoApi { get; }
        private ISonarrApi SonarrApi { get; }
        private ISickRageApi SickrageApi { get; }
        private IRequestService RequestService { get; }
        private ICacheProvider Cache { get; }
        private ISettingsService<AuthenticationSettings> Auth { get; }
        private ISettingsService<PlexSettings> PlexService { get; }
        private ISettingsService<CouchPotatoSettings> CpService { get; }
        private ISettingsService<PlexRequestSettings> PrService { get; }
        private ISettingsService<SonarrSettings> SonarrService { get; }
        private ISettingsService<SickRageSettings> SickRageService { get; }
        private ISettingsService<HeadphonesSettings> HeadphonesService { get; }
        private ISettingsService<EmailNotificationSettings> EmailNotificationSettings { get; }
        private IAvailabilityChecker Checker { get; }
        private ICouchPotatoCacher CpCacher { get; }
        private ISonarrCacher SonarrCacher { get; }
        private ISickRageCacher SickRageCacher { get; }
        private IMusicBrainzApi MusicBrainzApi { get; }
        private IHeadphonesApi HeadphonesApi { get; }
        private IRepository<UsersToNotify> UsersToNotifyRepo { get; }
        private IIssueService IssueService { get; }
        private IAnalytics Analytics { get; }
        private IRepository<RequestLimit> RequestLimitRepo { get; }
        private static Logger Log = LogManager.GetCurrentClassLogger();

        private async Task<Negotiator> RequestLoad()
        {

            var settings = await PrService.GetSettingsAsync();

            return View["Search/Index", settings];
        }

        private async Task<Response> UpcomingMovies()
        {
            Analytics.TrackEventAsync(Category.Search, Action.Movie, "Upcoming", Username, CookieHelper.GetAnalyticClientId(Cookies));
            return await ProcessMovies(MovieSearchType.Upcoming, string.Empty);
        }

        private async Task<Response> CurrentlyPlayingMovies()
        {
            Analytics.TrackEventAsync(Category.Search, Action.Movie, "CurrentlyPlaying", Username, CookieHelper.GetAnalyticClientId(Cookies));
            return await ProcessMovies(MovieSearchType.CurrentlyPlaying, string.Empty);
        }

        private async Task<Response> SearchMovie(string searchTerm)
        {
            Analytics.TrackEventAsync(Category.Search, Action.Movie, searchTerm, Username, CookieHelper.GetAnalyticClientId(Cookies));
            return await ProcessMovies(MovieSearchType.Search, searchTerm);
        }

        private async Task<Response> ProcessMovies(MovieSearchType searchType, string searchTerm)
        {
            List<MovieResult> apiMovies;

            switch (searchType)
            {
                case MovieSearchType.Search:
                    var movies = await MovieApi.SearchMovie(searchTerm);
                    apiMovies = movies.Select(x =>
                                    new MovieResult
                                    {
                                        Adult = x.Adult,
                                        BackdropPath = x.BackdropPath,
                                        GenreIds = x.GenreIds,
                                        Id = x.Id,
                                        OriginalLanguage = x.OriginalLanguage,
                                        OriginalTitle = x.OriginalTitle,
                                        Overview = x.Overview,
                                        Popularity = x.Popularity,
                                        PosterPath = x.PosterPath,
                                        ReleaseDate = x.ReleaseDate,
                                        Title = x.Title,
                                        Video = x.Video,
                                        VoteAverage = x.VoteAverage,
                                        VoteCount = x.VoteCount
                                    })
                                .ToList();
                    break;
                case MovieSearchType.CurrentlyPlaying:
                    apiMovies = await MovieApi.GetCurrentPlayingMovies();
                    break;
                case MovieSearchType.Upcoming:
                    apiMovies = await MovieApi.GetUpcomingMovies();
                    break;
                default:
                    apiMovies = new List<MovieResult>();
                    break;
            }

            var allResults = await RequestService.GetAllAsync();
            allResults = allResults.Where(x => x.Type == RequestType.Movie);

            var distinctResults = allResults.DistinctBy(x => x.ProviderId);
            var dbMovies = distinctResults.ToDictionary(x => x.ProviderId);


            var cpCached = CpCacher.QueuedIds();
            var plexMovies = Checker.GetPlexMovies();
            var settings = await PrService.GetSettingsAsync();
            var viewMovies = new List<SearchMovieViewModel>();
            foreach (var movie in apiMovies)
            {
                var viewMovie = new SearchMovieViewModel
                {
                    Adult = movie.Adult,
                    BackdropPath = movie.BackdropPath,
                    GenreIds = movie.GenreIds,
                    Id = movie.Id,
                    OriginalLanguage = movie.OriginalLanguage,
                    OriginalTitle = movie.OriginalTitle,
                    Overview = movie.Overview,
                    Popularity = movie.Popularity,
                    PosterPath = movie.PosterPath,
                    ReleaseDate = movie.ReleaseDate,
                    Title = movie.Title,
                    Video = movie.Video,
                    VoteAverage = movie.VoteAverage,
                    VoteCount = movie.VoteCount
                };
                var canSee = CanUserSeeThisRequest(viewMovie.Id, settings.UsersCanViewOnlyOwnRequests, dbMovies);
                if (Checker.IsMovieAvailable(plexMovies.ToArray(), movie.Title, movie.ReleaseDate?.Year.ToString()))
                {
                    viewMovie.Available = true;
                }
                else if (dbMovies.ContainsKey(movie.Id) && canSee) // compare to the requests db
                {
                    var dbm = dbMovies[movie.Id];

                    viewMovie.Requested = true;
                    viewMovie.Approved = dbm.Approved;
                    viewMovie.Available = dbm.Available;
                }
                else if (cpCached.Contains(movie.Id) && canSee) // compare to the couchpotato db
                {
                    viewMovie.Requested = true;
                }

                viewMovies.Add(viewMovie);
            }

            return Response.AsJson(viewMovies);
        }

        private bool CanUserSeeThisRequest(int movieId, bool usersCanViewOnlyOwnRequests, Dictionary<int, RequestedModel> moviesInDb)
        {
            if (usersCanViewOnlyOwnRequests)
            {
                var result = moviesInDb.FirstOrDefault(x => x.Value.ProviderId == movieId);
                return result.Value == null || result.Value.UserHasRequested(Username);
            }

            return true;
        }

        private async Task<Response> SearchTvShow(string searchTerm)
        {
            Analytics.TrackEventAsync(Category.Search, Action.TvShow, searchTerm, Username, CookieHelper.GetAnalyticClientId(Cookies));
            var plexSettings = await PlexService.GetSettingsAsync();
            var providerId = string.Empty;

            var apiTv = new List<TvMazeSearch>();
            await Task.Factory.StartNew(() => new TvMazeApi().Search(searchTerm)).ContinueWith((t) =>
            {
                apiTv = t.Result;
            });

            var allResults = await RequestService.GetAllAsync();
            allResults = allResults.Where(x => x.Type == RequestType.TvShow);

            var dbTv = allResults.ToDictionary(x => x.ProviderId);

            if (!apiTv.Any())
            {
                return Response.AsJson("");
            }

            var sonarrCached = SonarrCacher.QueuedIds();
            var sickRageCache = SickRageCacher.QueuedIds(); // consider just merging sonarr/sickrage arrays
            var plexTvShows = Checker.GetPlexTvShows();

            var viewTv = new List<SearchTvShowViewModel>();
            foreach (var t in apiTv)
            {
                var banner = t.show.image?.medium;
                if (!string.IsNullOrEmpty(banner))
                {
                    banner = banner.Replace("http", "https"); // Always use the Https banners
                }

                var viewT = new SearchTvShowViewModel
                {
                    Banner = banner,
                    FirstAired = t.show.premiered,
                    Id = t.show.externals?.thetvdb ?? 0,
                    ImdbId = t.show.externals?.imdb,
                    Network = t.show.network?.name,
                    NetworkId = t.show.network?.id.ToString(),
                    Overview = t.show.summary.RemoveHtml(),
                    Rating = t.score.ToString(CultureInfo.CurrentUICulture),
                    Runtime = t.show.runtime.ToString(),
                    SeriesId = t.show.id,
                    SeriesName = t.show.name,
                    Status = t.show.status
                };


                if (plexSettings.AdvancedSearch)
                {
                    providerId = viewT.Id.ToString();
                }

                if (Checker.IsTvShowAvailable(plexTvShows.ToArray(), t.show.name, t.show.premiered?.Substring(0, 4), providerId))
                {
                    viewT.Available = true;
                }
                else if (t.show?.externals?.thetvdb != null)
                {
                    var tvdbid = (int)t.show.externals.thetvdb;
                    if (dbTv.ContainsKey(tvdbid))
                    {
                        var dbt = dbTv[tvdbid];

                        viewT.Requested = true;
                        viewT.Episodes = dbt.Episodes.ToList();
                        viewT.Approved = dbt.Approved;
                        viewT.Available = dbt.Available;
                    }
                    if (sonarrCached.Contains(tvdbid) || sickRageCache.Contains(tvdbid)) // compare to the sonarr/sickrage db
                    {
                        viewT.Requested = true;
                    }
                }
                
                viewTv.Add(viewT);
            }

            return Response.AsJson(viewTv);
        }

        private async Task<Response> SearchMusic(string searchTerm)
        {
            Analytics.TrackEventAsync(Category.Search, Action.Album, searchTerm, Username, CookieHelper.GetAnalyticClientId(Cookies));
            var apiAlbums = new List<Release>();
            await Task.Run(() => MusicBrainzApi.SearchAlbum(searchTerm)).ContinueWith((t) =>
            {
                apiAlbums = t.Result.releases ?? new List<Release>();
            });

            var allResults = await RequestService.GetAllAsync();
            allResults = allResults.Where(x => x.Type == RequestType.Album);

            var dbAlbum = allResults.ToDictionary(x => x.MusicBrainzId);

            var plexAlbums = Checker.GetPlexAlbums();

            var viewAlbum = new List<SearchMusicViewModel>();
            foreach (var a in apiAlbums)
            {
                var viewA = new SearchMusicViewModel
                {
                    Title = a.title,
                    Id = a.id,
                    Artist = a.ArtistCredit?.Select(x => x.artist?.name).FirstOrDefault(),
                    Overview = a.disambiguation,
                    ReleaseDate = a.date,
                    TrackCount = a.TrackCount,
                    ReleaseType = a.status,
                    Country = a.country
                };

                DateTime release;
                DateTimeHelper.CustomParse(a.ReleaseEvents?.FirstOrDefault()?.date, out release);
                var artist = a.ArtistCredit?.FirstOrDefault()?.artist;
                if (Checker.IsAlbumAvailable(plexAlbums.ToArray(), a.title, release.ToString("yyyy"), artist?.name))
                {
                    viewA.Available = true;
                }
                if (!string.IsNullOrEmpty(a.id) && dbAlbum.ContainsKey(a.id))
                {
                    var dba = dbAlbum[a.id];

                    viewA.Requested = true;
                    viewA.Approved = dba.Approved;
                    viewA.Available = dba.Available;
                }

                viewAlbum.Add(viewA);
            }
            return Response.AsJson(viewAlbum);
        }

        private async Task<Response> RequestMovie(int movieId)
        {
            var settings = await PrService.GetSettingsAsync();
            if (!await CheckRequestLimit(settings, RequestType.Movie))
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = "You have reached your weekly request limit for Movies! Please contact your admin." });
            }

            Analytics.TrackEventAsync(Category.Search, Action.Request, "Movie", Username, CookieHelper.GetAnalyticClientId(Cookies));
            var movieInfo = await MovieApi.GetMovieInformation(movieId);
            var fullMovieName = $"{movieInfo.Title}{(movieInfo.ReleaseDate.HasValue ? $" ({movieInfo.ReleaseDate.Value.Year})" : string.Empty)}";

            var existingRequest = await RequestService.CheckRequestAsync(movieId);
            if (existingRequest != null)
            {
                // check if the current user is already marked as a requester for this movie, if not, add them
                if (!existingRequest.UserHasRequested(Username))
                {
                    existingRequest.RequestedUsers.Add(Username);
                    await RequestService.UpdateRequestAsync(existingRequest);
                }

                return Response.AsJson(new JsonResponseModel { Result = true, Message = settings.UsersCanViewOnlyOwnRequests ? $"{fullMovieName} {Resources.UI.Search_SuccessfullyAdded}" : $"{fullMovieName} {Resources.UI.Search_AlreadyRequested}" });
            }

            try
            {
                var movies = Checker.GetPlexMovies();
                if (Checker.IsMovieAvailable(movies.ToArray(), movieInfo.Title, movieInfo.ReleaseDate?.Year.ToString()))
                {
                    return Response.AsJson(new JsonResponseModel { Result = false, Message = $"{fullMovieName} is already in Plex!" });
                }
            }
            catch (Exception e)
            {
                Log.Error(e);
                return Response.AsJson(new JsonResponseModel { Result = false, Message = string.Format(Resources.UI.Search_CouldNotCheckPlex, fullMovieName) });
            }
            //#endif

            var model = new RequestedModel
            {
                ProviderId = movieInfo.Id,
                Type = RequestType.Movie,
                Overview = movieInfo.Overview,
                ImdbId = movieInfo.ImdbId,
                PosterPath = "https://image.tmdb.org/t/p/w150/" + movieInfo.PosterPath,
                Title = movieInfo.Title,
                ReleaseDate = movieInfo.ReleaseDate ?? DateTime.MinValue,
                Status = movieInfo.Status,
                RequestedDate = DateTime.UtcNow,
                Approved = false,
                RequestedUsers = new List<string> { Username },
                Issues = IssueState.None,

            };

            if (ShouldAutoApprove(RequestType.Movie, settings))
            {
                var cpSettings = await CpService.GetSettingsAsync();
                model.Approved = true;
                if (cpSettings.Enabled)
                {
                    Log.Info("Adding movie to CP (No approval required)");
                    var result = CouchPotatoApi.AddMovie(model.ImdbId, cpSettings.ApiKey, model.Title,
                        cpSettings.FullUri, cpSettings.ProfileId);
                    Log.Debug("Adding movie to CP result {0}", result);
                    if (result)
                    {
                        return await AddRequest(model, settings, $"{fullMovieName} {Resources.UI.Search_SuccessfullyAdded}");
                    }

                    return Response.AsJson(new JsonResponseModel
                    {
                        Result = false,
                        Message = Resources.UI.Search_CouchPotatoError
                    });
                }
                model.Approved = true;
                return await AddRequest(model, settings, $"{fullMovieName} {Resources.UI.Search_SuccessfullyAdded}");
            }

            try
            {
                return await AddRequest(model, settings, $"{fullMovieName} {Resources.UI.Search_SuccessfullyAdded}");
            }
            catch (Exception e)
            {
                Log.Fatal(e);

                return Response.AsJson(new JsonResponseModel { Result = false, Message = Resources.UI.Search_CouchPotatoError });
            }
        }

        /// <summary>
        /// Requests the tv show.
        /// </summary>
        /// <param name="showId">The show identifier.</param>
        /// <param name="seasons">The seasons.</param>
        /// <returns></returns>
        private async Task<Response> RequestTvShow(int showId, string seasons)
        {
            // Get the JSON from the request
            var req = (Dictionary<string, object>.ValueCollection)Request.Form.Values;
            EpisodeRequestModel episodeModel = null;
            if (req.Count == 1)
            {
                var json = req.FirstOrDefault()?.ToString();
                episodeModel = JsonConvert.DeserializeObject<EpisodeRequestModel>(json); // Convert it into the object
            }
            var episodeRequest = false;

            var settings = await PrService.GetSettingsAsync();
            if (!await CheckRequestLimit(settings, RequestType.TvShow))
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = Resources.UI.Search_WeeklyRequestLimitTVShow });
            }
            Analytics.TrackEventAsync(Category.Search, Action.Request, "TvShow", Username, CookieHelper.GetAnalyticClientId(Cookies));

            var sonarrSettings = SonarrService.GetSettingsAsync();

            // This means we are requesting an episode rather than a whole series or season
            if (episodeModel != null)
            {
                episodeRequest = true;
                showId = episodeModel.ShowId;
                var s = await sonarrSettings;
                if (!s.Enabled)
                {
                    return Response.AsJson(new JsonResponseModel { Message = "This is currently only supported with Sonarr, Please enable Sonarr for this feature", Result = false });
                }
            }

            var showInfo = TvApi.ShowLookupByTheTvDbId(showId);
            DateTime firstAir;
            DateTime.TryParse(showInfo.premiered, out firstAir);
            string fullShowName = $"{showInfo.name} ({firstAir.Year})";

            if (showInfo.externals?.thetvdb == null)
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = "Our TV Provider (TVMaze) doesn't have a TheTVDBId for this item. Please report this to TVMaze. We cannot add the series sorry." });
            }

            // check if the show/episodes have already been requested

            var existingRequest = await RequestService.CheckRequestAsync(showId);
            var difference = new List<Store.EpisodesModel>();
            if (existingRequest != null)
            {
                if (episodeRequest)
                {
                    difference = GetListDifferences(existingRequest.Episodes, episodeModel.Episodes).ToList();
                    if (difference.Any())
                    {
                        existingRequest.Episodes = episodeModel.Episodes
                                                    .Select(r =>
                                                        new EpisodesModel
                                                        {
                                                            SeasonNumber = r.SeasonNumber,
                                                            EpisodeNumber = r.EpisodeNumber
                                                        }).ToList();

                        return await AddUserToRequest(existingRequest, settings, fullShowName);
                    }
                    // We have an episode that has not yet been requested, let's continue
                }
                else
                {
                    return await AddUserToRequest(existingRequest, settings, fullShowName);
                }
            }

            var model = new RequestedModel
            {
                ProviderId = showInfo.externals?.thetvdb ?? 0,
                Type = RequestType.TvShow,
                Overview = showInfo.summary.RemoveHtml(),
                PosterPath = showInfo.image?.medium,
                Title = showInfo.name,
                ReleaseDate = firstAir,
                Status = showInfo.status,
                RequestedDate = DateTime.UtcNow,
                Approved = false,
                RequestedUsers = new List<string> { Username },
                Issues = IssueState.None,
                ImdbId = showInfo.externals?.imdb ?? string.Empty,
                SeasonCount = showInfo.seasonCount,
                TvDbId = showId.ToString()
            };


            var seasonsList = new List<int>();
            switch (seasons)
            {
                case "first":
                    seasonsList.Add(1);
                    model.SeasonsRequested = "First";
                    break;
                case "latest":
                    seasonsList.Add(model.SeasonCount);
                    model.SeasonsRequested = "Latest";
                    break;
                case "all":
                    model.SeasonsRequested = "All";
                    break;
                case "episode":
                    model.Episodes = new List<EpisodesModel>();

                    foreach (var ep in episodeModel?.Episodes ?? new Models.EpisodesModel[0])
                    {
                        model.Episodes.Add(new EpisodesModel { EpisodeNumber = ep.EpisodeNumber, SeasonNumber = ep.SeasonNumber });
                    }
                    Analytics.TrackEventAsync(Category.Requests, Action.TvShow, $"Episode request for {model.Title}", Username, CookieHelper.GetAnalyticClientId(Cookies));
                    break;
                default:
                    model.SeasonsRequested = seasons;
                    var split = seasons.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
                    var seasonsCount = new int[split.Length];
                    for (var i = 0; i < split.Length; i++)
                    {
                        int tryInt;
                        int.TryParse(split[i], out tryInt);
                        seasonsCount[i] = tryInt;
                    }
                    seasonsList.AddRange(seasonsCount);
                    break;
            }

            model.SeasonList = seasonsList.ToArray();

            try
            {
                var shows = Checker.GetPlexTvShows();
                var providerId = string.Empty;
                var plexSettings = await PlexService.GetSettingsAsync();
                if (plexSettings.AdvancedSearch)
                {
                    providerId = showId.ToString();
                }
                if (episodeRequest)
                {
                    var cachedEpisodesTask = await Checker.GetEpisodes();
                    var cachedEpisodes = cachedEpisodesTask.ToList();
                    foreach (var d in difference)
                    {
                        if (cachedEpisodes.Any(x => x.SeasonNumber == d.SeasonNumber && x.EpisodeNumber == d.EpisodeNumber && x.ProviderId == providerId))
                        {
                            return Response.AsJson(new JsonResponseModel { Result = false, Message = $"{fullShowName}  {d.SeasonNumber} - {d.EpisodeNumber} {Resources.UI.Search_AlreadyInPlex}" });
                        }
                    }
                }
                else
                {
                    if (Checker.IsTvShowAvailable(shows.ToArray(), showInfo.name, showInfo.premiered?.Substring(0, 4), providerId, model.SeasonList))
                    {
                        return Response.AsJson(new JsonResponseModel { Result = false, Message = $"{fullShowName} {Resources.UI.Search_AlreadyInPlex}" });
                    }
                }
            }
            catch (Exception)
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = string.Format(Resources.UI.Search_CouldNotCheckPlex, fullShowName) });
            }


            if (ShouldAutoApprove(RequestType.TvShow, settings))
            {
                model.Approved = true;
                var s = await sonarrSettings;
                var sender = new TvSender(SonarrApi, SickrageApi);
                if (s.Enabled)
                {
                    var result = await sender.SendToSonarr(s, model);
                    if (!string.IsNullOrEmpty(result?.title))
                    {
                        return await AddRequest(model, settings, $"{fullShowName} {Resources.UI.Search_SuccessfullyAdded}");
                    }
                    Log.Debug("Error with sending to sonarr.");
                    return Response.AsJson(ValidationHelper.SendSonarrError(result?.ErrorMessages ?? new List<string>()));
                }

                var srSettings = SickRageService.GetSettings();
                if (srSettings.Enabled)
                {
                    var result = sender.SendToSickRage(srSettings, model);
                    if (result?.result == "success")
                    {
                        return await AddRequest(model, settings, $"{fullShowName} {Resources.UI.Search_SuccessfullyAdded}");
                    }
                    return Response.AsJson(new JsonResponseModel { Result = false, Message = result?.message ?? Resources.UI.Search_SickrageError });
                }

                if (!srSettings.Enabled && !s.Enabled)
                {
                    return await AddRequest(model, settings, $"{fullShowName} {Resources.UI.Search_SuccessfullyAdded}");
                }

                return Response.AsJson(new JsonResponseModel { Result = false, Message = Resources.UI.Search_TvNotSetUp });

            }
            return await AddRequest(model, settings, $"{fullShowName} {Resources.UI.Search_SuccessfullyAdded}");
        }

        private async Task<Response> AddUserToRequest(RequestedModel existingRequest, PlexRequestSettings settings, string fullShowName)
        {
            // check if the current user is already marked as a requester for this show, if not, add them
            if (!existingRequest.UserHasRequested(Username) || existingRequest.Episodes.Any())
            {
                existingRequest.RequestedUsers.Add(Username);
                await RequestService.UpdateRequestAsync(existingRequest);
            }
            return
                Response.AsJson(
                    new JsonResponseModel
                    {
                        Result = true,
                        Message =
                            settings.UsersCanViewOnlyOwnRequests
                                ? $"{fullShowName} {Resources.UI.Search_SuccessfullyAdded}"
                                : $"{fullShowName} {Resources.UI.Search_AlreadyRequested}"
                    });
        }

        private bool ShouldSendNotification(RequestType type, PlexRequestSettings prSettings)
        {
            var sendNotification = ShouldAutoApprove(type, prSettings) ? !prSettings.IgnoreNotifyForAutoApprovedRequests : true;
            var claims = Context.CurrentUser?.Claims;
            if (claims != null)
            {
                var enumerable = claims as string[] ?? claims.ToArray();
                if (enumerable.Contains(UserClaims.Admin) || enumerable.Contains(UserClaims.PowerUser))
                {
                    sendNotification = false; // Don't bother sending a notification if the user is an admin
                }
            }
            return sendNotification;
        }


        private async Task<Response> RequestAlbum(string releaseId)
        {
            var settings = await PrService.GetSettingsAsync();
            if (!await CheckRequestLimit(settings, RequestType.Album))
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = Resources.UI.Search_WeeklyRequestLimitAlbums });
            }
            Analytics.TrackEventAsync(Category.Search, Action.Request, "Album", Username, CookieHelper.GetAnalyticClientId(Cookies));
            var existingRequest = await RequestService.CheckRequestAsync(releaseId);

            if (existingRequest != null)
            {
                if (!existingRequest.UserHasRequested(Username))
                {
                    existingRequest.RequestedUsers.Add(Username);
                    await RequestService.UpdateRequestAsync(existingRequest);
                }
                return Response.AsJson(new JsonResponseModel { Result = true, Message = settings.UsersCanViewOnlyOwnRequests ? $"{existingRequest.Title} {Resources.UI.Search_SuccessfullyAdded}" : $"{existingRequest.Title} {Resources.UI.Search_AlreadyRequested}" });
            }

            var albumInfo = MusicBrainzApi.GetAlbum(releaseId);
            DateTime release;
            DateTimeHelper.CustomParse(albumInfo.ReleaseEvents?.FirstOrDefault()?.date, out release);

            var artist = albumInfo.ArtistCredits?.FirstOrDefault()?.artist;
            if (artist == null)
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = Resources.UI.Search_MusicBrainzError });
            }

            var albums = Checker.GetPlexAlbums();
            var alreadyInPlex = Checker.IsAlbumAvailable(albums.ToArray(), albumInfo.title, release.ToString("yyyy"), artist.name);

            if (alreadyInPlex)
            {
                return Response.AsJson(new JsonResponseModel
                {
                    Result = false,
                    Message = $"{albumInfo.title} {Resources.UI.Search_AlreadyInPlex}"
                });
            }

            var img = GetMusicBrainzCoverArt(albumInfo.id);

            var model = new RequestedModel
            {
                Title = albumInfo.title,
                MusicBrainzId = albumInfo.id,
                Overview = albumInfo.disambiguation,
                PosterPath = img,
                Type = RequestType.Album,
                ProviderId = 0,
                RequestedUsers = new List<string> { Username },
                Status = albumInfo.status,
                Issues = IssueState.None,
                RequestedDate = DateTime.UtcNow,
                ReleaseDate = release,
                ArtistName = artist.name,
                ArtistId = artist.id
            };

            if (ShouldAutoApprove(RequestType.Album, settings))
            {
                model.Approved = true;
                var hpSettings = HeadphonesService.GetSettings();

                if (!hpSettings.Enabled)
                {
                    await RequestService.AddRequestAsync(model);
                    return
                        Response.AsJson(new JsonResponseModel
                        {
                            Result = true,
                            Message = $"{model.Title} {Resources.UI.Search_SuccessfullyAdded}"
                        });
                }

                var sender = new HeadphonesSender(HeadphonesApi, hpSettings, RequestService);
                await sender.AddAlbum(model);
                return await AddRequest(model, settings, $"{model.Title} {Resources.UI.Search_SuccessfullyAdded}");
            }

            return await AddRequest(model, settings, $"{model.Title} {Resources.UI.Search_SuccessfullyAdded}");
        }

        private string GetMusicBrainzCoverArt(string id)
        {
            var coverArt = MusicBrainzApi.GetCoverArt(id);
            var firstImage = coverArt?.images?.FirstOrDefault();
            var img = string.Empty;

            if (firstImage != null)
            {
                img = firstImage.thumbnails?.small ?? firstImage.image;
            }

            return img;
        }

        private bool ShouldAutoApprove(RequestType requestType, PlexRequestSettings prSettings)
        {
            // if the user is an admin or they are whitelisted, they go ahead and allow auto-approval
            if (IsAdmin || prSettings.ApprovalWhiteList.Any(x => x.Equals(Username, StringComparison.OrdinalIgnoreCase))) return true;

            // check by request type if the category requires approval or not
            switch (requestType)
            {
                case RequestType.Movie:
                    return !prSettings.RequireMovieApproval;
                case RequestType.TvShow:
                    return !prSettings.RequireTvShowApproval;
                case RequestType.Album:
                    return !prSettings.RequireMusicApproval;
                default:
                    return false;
            }
        }

        private async Task<Response> NotifyUser(bool notify)
        {
            Analytics.TrackEventAsync(Category.Search, Action.Save, "NotifyUser", Username, CookieHelper.GetAnalyticClientId(Cookies), notify ? 1 : 0);
            var authSettings = await Auth.GetSettingsAsync();
            var auth = authSettings.UserAuthentication;
            var emailSettings = await EmailNotificationSettings.GetSettingsAsync();
            var email = emailSettings.EnableUserEmailNotifications;
            if (!auth)
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = Resources.UI.Search_ErrorPlexAccountOnly });
            }
            if (!email)
            {
                return Response.AsJson(new JsonResponseModel { Result = false, Message = Resources.UI.Search_ErrorNotEnabled });
            }
            var username = Username;
            var originalList = await UsersToNotifyRepo.GetAllAsync();
            if (!notify)
            {
                if (originalList == null)
                {
                    return Response.AsJson(new JsonResponseModel { Result = false, Message = Resources.UI.Search_NotificationError });
                }
                var userToRemove = originalList.FirstOrDefault(x => x.Username == username);
                if (userToRemove != null)
                {
                    await UsersToNotifyRepo.DeleteAsync(userToRemove);
                }
                return Response.AsJson(new JsonResponseModel { Result = true });
            }


            if (originalList == null)
            {
                var userModel = new UsersToNotify { Username = username };
                var insertResult = await UsersToNotifyRepo.InsertAsync(userModel);
                return Response.AsJson(insertResult != -1 ? new JsonResponseModel { Result = true } : new JsonResponseModel { Result = false, Message = Resources.UI.Common_CouldNotSave });
            }

            var existingUser = originalList.FirstOrDefault(x => x.Username == username);
            if (existingUser != null)
            {
                return Response.AsJson(new JsonResponseModel { Result = true }); // It's already enabled
            }
            else
            {
                var userModel = new UsersToNotify { Username = username };
                var insertResult = await UsersToNotifyRepo.InsertAsync(userModel);
                return Response.AsJson(insertResult != -1 ? new JsonResponseModel { Result = true } : new JsonResponseModel { Result = false, Message = Resources.UI.Common_CouldNotSave });
            }

        }
        private async Task<Response> GetUserNotificationSettings()
        {
            var all = await UsersToNotifyRepo.GetAllAsync();
            var retVal = all.FirstOrDefault(x => x.Username == Username);
            return Response.AsJson(retVal != null);
        }

        private Response GetSeasons()
        {
            var seriesId = (int)Request.Query.tvId;
            var show = TvApi.ShowLookupByTheTvDbId(seriesId);
            var seasons = TvApi.GetSeasons(show.id);
            var model = seasons.Select(x => x.number);
            return Response.AsJson(model);
        }

        private async Task<Response> GetEpisodes()
        {
            var seriesId = (int)Request.Query.tvId;
            var s = await SonarrService.GetSettingsAsync();
            var sonarrEnabled = s.Enabled;
            var allResults = await RequestService.GetAllAsync();

            var seriesTask = Task.Run(
                () =>
                {
                    if (sonarrEnabled)
                    {
                        var allSeries = SonarrApi.GetSeries(s.ApiKey, s.FullUri);
                        var selectedSeries = allSeries.FirstOrDefault(x => x.tvdbId == seriesId) ?? new Series();
                        return selectedSeries;
                    }
                    return new Series();
                });

            var model = new List<EpisodeListViewModel>();

            var requests = allResults as RequestedModel[] ?? allResults.ToArray();

            var existingRequest = requests.FirstOrDefault(x => x.Type == RequestType.TvShow && x.TvDbId == seriesId.ToString());
            var show = await Task.Run(() => TvApi.ShowLookupByTheTvDbId(seriesId));
            var tvMaxeEpisodes = await Task.Run(() => TvApi.EpisodeLookup(show.id));

            var sonarrEpisodes = new List<SonarrEpisodes>();
            if (sonarrEnabled)
            {
                var sonarrSeries = await seriesTask;
                var sonarrEp = SonarrApi.GetEpisodes(sonarrSeries.id.ToString(), s.ApiKey, s.FullUri);
                sonarrEpisodes = sonarrEp?.ToList() ?? new List<SonarrEpisodes>();
            }

            var plexCacheTask = await Checker.GetEpisodes(seriesId);
            var plexCache = plexCacheTask.ToList();
            foreach (var ep in tvMaxeEpisodes)
            {
                var requested = existingRequest?.Episodes
                    .Any(episodesModel =>
                    ep.number == episodesModel.EpisodeNumber && ep.season == episodesModel.SeasonNumber) ?? false;

                var alreadyInPlex = plexCache.Any(x => x.EpisodeNumber == ep.number && x.SeasonNumber == ep.season);
                var inSonarr = sonarrEpisodes.Any(x => x.seasonNumber == ep.season && x.episodeNumber == ep.number && x.hasFile);

                model.Add(new EpisodeListViewModel
                {
                    Id = show.id,
                    SeasonNumber = ep.season,
                    EpisodeNumber = ep.number,
                    Requested = requested || alreadyInPlex || inSonarr,
                    Name = ep.name,
                    EpisodeId = ep.id
                });
            }

            return Response.AsJson(model);
        }

        public async Task<bool> CheckRequestLimit(PlexRequestSettings s, RequestType type)
        {
            if (IsAdmin)
                return true;

            if (s.ApprovalWhiteList.Contains(Username))
                return true;

            var requestLimit = GetRequestLimitForType(type, s);
            if (requestLimit == 0)
            {
                return true;
            }

            var limit = await RequestLimitRepo.GetAllAsync();
            var usersLimit = limit.FirstOrDefault(x => x.Username == Username && x.RequestType == type);
            if (usersLimit == null)
            {
                // Have not set a requestLimit yet
                return true;
            }

            return requestLimit > usersLimit.RequestCount;
        }

        private int GetRequestLimitForType(RequestType type, PlexRequestSettings s)
        {
            int requestLimit;
            switch (type)
            {
                case RequestType.Movie:
                    requestLimit = s.MovieWeeklyRequestLimit;
                    break;
                case RequestType.TvShow:
                    requestLimit = s.TvWeeklyRequestLimit;
                    break;
                case RequestType.Album:
                    requestLimit = s.AlbumWeeklyRequestLimit;
                    break;
                default:
                    throw new ArgumentOutOfRangeException(nameof(type), type, null);
            }
            return requestLimit;
        }

        private async Task<Response> AddRequest(RequestedModel model, PlexRequestSettings settings, string message)
        {
            await RequestService.AddRequestAsync(model);

            if (ShouldSendNotification(model.Type, settings))
            {
                var notificationModel = new NotificationModel
                {
                    Title = model.Title,
                    User = Username,
                    DateTime = DateTime.Now,
                    NotificationType = NotificationType.NewRequest,
                    RequestType = model.Type
                };
                await NotificationService.Publish(notificationModel);
            }

            var limit = await RequestLimitRepo.GetAllAsync();
            var usersLimit = limit.FirstOrDefault(x => x.Username == Username && x.RequestType == model.Type);
            if (usersLimit == null)
            {
                await RequestLimitRepo.InsertAsync(new RequestLimit
                {
                    Username = Username,
                    RequestType = model.Type,
                    FirstRequestDate = DateTime.UtcNow,
                    RequestCount = 1
                });
            }
            else
            {
                usersLimit.RequestCount++;
                await RequestLimitRepo.UpdateAsync(usersLimit);
            }

            return Response.AsJson(new JsonResponseModel { Result = true, Message = message });
        }

        private IEnumerable<Store.EpisodesModel> GetListDifferences(IEnumerable<EpisodesModel> existing, IEnumerable<Models.EpisodesModel> request)
        {
            var newRequest = request
                .Select(r =>
                    new EpisodesModel
                    {
                        SeasonNumber = r.SeasonNumber,
                        EpisodeNumber = r.EpisodeNumber
                    }).ToList();

            return newRequest.Except(existing);
        }
    }
}