using System;
using AutoMapper;
using System.Collections.Generic;
using System.Linq;
using System.Security.Principal;
using System.Threading.Tasks;
using Ombi.Core.Rule.Interfaces;
using Ombi.Store.Repository.Requests;
using Ombi.Core.Authentication;
using Ombi.Helpers;
using Ombi.Settings.Settings.Models;
using Ombi.Store.Entities;
using Ombi.Api.Trakt;
using Ombi.Api.TvMaze;
using Ombi.Core.Models.Requests;
using Ombi.Core.Models.Search;
using Ombi.Core.Models.Search.V2;
using Ombi.Core.Settings;
using Ombi.Store.Repository;
using TraktSharp.Entities;
using Microsoft.EntityFrameworkCore;
using System.Threading;
using Ombi.Api.TheMovieDb;
using Ombi.Api.TheMovieDb.Models;

namespace Ombi.Core.Engine.V2
{
    public class TvSearchEngineV2 : BaseMediaEngine, ITVSearchEngineV2
    {
        private readonly ITvMazeApi _tvMaze;
        private readonly IMapper _mapper;
        private readonly ITraktApi _traktApi;
        private readonly IMovieDbApi _movieApi;
        private readonly ISettingsService<CustomizationSettings> _customization;

        public TvSearchEngineV2(IPrincipal identity, IRequestServiceMain service, ITvMazeApi tvMaze, IMapper mapper,
            ITraktApi trakt, IRuleEvaluator r, OmbiUserManager um, ICacheService memCache, ISettingsService<OmbiSettings> s,
            IRepository<RequestSubscription> sub, IMovieDbApi movieApi, ISettingsService<CustomizationSettings> customization)
            : base(identity, service, r, um, memCache, s, sub)
        {
            _tvMaze = tvMaze;
            _mapper = mapper;
            _traktApi = trakt;
            _movieApi = movieApi;
            _customization = customization;
        }


        public async Task<SearchFullInfoTvShowViewModel> GetShowByRequest(int requestId, CancellationToken token)
        {
            var request = await RequestService.TvRequestService.Get().FirstOrDefaultAsync(x => x.Id == requestId);
            return await GetShowInformation(request.ExternalProviderId.ToString(), token); // TODO
        }

        public async Task<SearchFullInfoTvShowViewModel> GetShowInformation(string tvdbid, CancellationToken token)
        {
            var show = await Cache.GetOrAdd(nameof(GetShowInformation) + tvdbid,
              async () => await _movieApi.GetTVInfo(tvdbid), DateTime.Now.AddHours(12));
            if (show == null || show.name == null)
            {
                // We don't have enough information
                return null;
            }

            var mapped = _mapper.Map<SearchFullInfoTvShowViewModel>(show);


            foreach (var tvSeason in show.seasons.Where(x => x.season_number != 0)) // skip the first season
            {
                var seasonEpisodes = (await _movieApi.GetSeasonEpisodes(show.id, tvSeason.season_number, token));

                foreach (var episode in seasonEpisodes.episodes)
                {
                    var season = mapped.SeasonRequests.FirstOrDefault(x => x.SeasonNumber == episode.season_number);
                    if (season == null)
                    {
                        var newSeason = new SeasonRequests
                        {
                            SeasonNumber = episode.season_number,
                            Overview = tvSeason.overview,
                            Episodes = new List<EpisodeRequests>()
                        };
                        newSeason.Episodes.Add(new EpisodeRequests
                        {
                            //Url = episode...ToHttpsUrl(),
                            Title = episode.name,
                            AirDate = episode.air_date.HasValue() ? DateTime.Parse(episode.air_date) : DateTime.MinValue,
                            EpisodeNumber = episode.episode_number,

                        });
                        mapped.SeasonRequests.Add(newSeason);
                    }
                    else
                    {
                        // We already have the season, so just add the episode
                        season.Episodes.Add(new EpisodeRequests
                        {
                            //Url = e.url.ToHttpsUrl(),
                            Title = episode.name,
                            AirDate = episode.air_date.HasValue() ? DateTime.Parse(episode.air_date) : DateTime.MinValue,
                            EpisodeNumber = episode.episode_number,
                        });
                    }
                }
            }

            return await ProcessResult(mapped);
        }

        public async Task<IEnumerable<SearchTvShowViewModel>> Popular(int currentlyLoaded, int amountToLoad)
        {
            var langCode = await DefaultLanguageCode(null);

            var pages = PaginationHelper.GetNextPages(currentlyLoaded, amountToLoad, ResultLimit);
            var results = new List<MovieDbSearchResult>();
            foreach (var pagesToLoad in pages)
            {
                var apiResult = await Cache.GetOrAdd(nameof(Popular) + langCode + pagesToLoad.Page,
                 async () => await _movieApi.PopularTv(langCode, pagesToLoad.Page), DateTime.Now.AddHours(12));
                results.AddRange(apiResult.Skip(pagesToLoad.Skip).Take(pagesToLoad.Take));
            }

            var processed = ProcessResults(results);
            return await processed;
        }

        public async Task<IEnumerable<SearchTvShowViewModel>> Anticipated(int currentlyLoaded, int amountToLoad)
        {
            var langCode = await DefaultLanguageCode(null);

            var pages = PaginationHelper.GetNextPages(currentlyLoaded, amountToLoad, ResultLimit);
            var results = new List<MovieDbSearchResult>();
            foreach (var pagesToLoad in pages)
            {
                var apiResult = await Cache.GetOrAdd(nameof(Anticipated) + langCode + pagesToLoad.Page,
                    async () => await _movieApi.UpcomingTv(langCode, pagesToLoad.Page), DateTime.Now.AddHours(12));
                results.AddRange(apiResult.Skip(pagesToLoad.Skip).Take(pagesToLoad.Take));
            }
            var processed = ProcessResults(results);
            return await processed;
        }

        public async Task<IEnumerable<SearchTvShowViewModel>> Trending(int currentlyLoaded, int amountToLoad)
        {
            var langCode = await DefaultLanguageCode(null);

            var pages = PaginationHelper.GetNextPages(currentlyLoaded, amountToLoad, ResultLimit);
            var results = new List<MovieDbSearchResult>();
            foreach (var pagesToLoad in pages)
            {
                var apiResult = await Cache.GetOrAdd(nameof(Trending) + langCode + pagesToLoad.Page,
                    async () => await _movieApi.TopRatedTv(langCode, pagesToLoad.Page), DateTime.Now.AddHours(12));
                results.AddRange(apiResult.Skip(pagesToLoad.Skip).Take(pagesToLoad.Take));
            }
            var processed = ProcessResults(results);
            return await processed;
        }


        public async Task<IEnumerable<StreamingData>> GetStreamInformation(int movieDbId, CancellationToken cancellationToken)
        {
            var providers = await _movieApi.GetTvWatchProviders(movieDbId, cancellationToken);
            var results = await GetUserWatchProvider(providers);

            var data = new List<StreamingData>();

            foreach (var result in results)
            {
                data.Add(new StreamingData
                {
                    Logo = result.logo_path,
                    Order = result.display_priority,
                    StreamingProvider = result.provider_name
                });
            }

            return data;
        }

        private async Task<IEnumerable<SearchTvShowViewModel>> ProcessResults<T>(IEnumerable<T> items)
        {
            var retVal = new List<SearchTvShowViewModel>(); 
            var settings = await _customization.GetSettingsAsync();
            foreach (var tvMazeSearch in items)
            {
                var result = await ProcessResult(tvMazeSearch);
                if (result == null || settings.HideAvailableFromDiscover && result.Available)
                {
                    continue;
                }
                retVal.Add(result);
            }
            return retVal;
        }

        private async Task<SearchTvShowViewModel> ProcessResult<T>(T tvMazeSearch)
        {
            var item = _mapper.Map<SearchTvShowViewModel>(tvMazeSearch);

            await RunSearchRules(item);
            return item;
        }

        private async Task<SearchFullInfoTvShowViewModel> ProcessResult(SearchFullInfoTvShowViewModel item)
        {
            item.TheMovieDbId = item.Id.ToString();

            var oldModel = _mapper.Map<SearchTvShowViewModel>(item);
            await RunSearchRules(oldModel);

            item.Available = oldModel.Available;
            item.FullyAvailable = oldModel.FullyAvailable;
            item.PartlyAvailable = oldModel.PartlyAvailable;
            item.Requested = oldModel.Requested;
            item.Available = oldModel.Available;
            item.Approved = oldModel.Approved;
            item.SeasonRequests = oldModel.SeasonRequests;
            item.RequestId = oldModel.RequestId;

            if (!string.IsNullOrEmpty(item.Images?.Medium))
            {
                item.Images.Medium = item.Images.Medium.ToHttpsUrl();
            }

           
            return item;
            //return await GetExtraInfo(showInfoTask, item);
        }

        private async Task<SearchFullInfoTvShowViewModel> GetExtraInfo(Task<TraktShow> showInfoTask, SearchFullInfoTvShowViewModel model)
        {
            if (showInfoTask != null)
            {
                var result = await showInfoTask;
                if (result == null)
                {
                    return model;
                }

                model.Trailer = result.Trailer?.AbsoluteUri.ToHttpsUrl() ?? string.Empty;
                model.Certification = result.Certification;
                model.Homepage = result.Homepage?.AbsoluteUri.ToHttpsUrl() ?? string.Empty;
            }
            return model;
        }
    }
}