using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Movies;
using MediaBrowser.Controller.Entities.TV;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Serialization;
using MediaBrowser.Providers.Movies;
using MediaBrowser.Providers.TV;
using System;
using System.Globalization;
using System.Threading;
using System.Threading.Tasks;

namespace MediaBrowser.Providers.Omdb
{
    public class OmdbItemProvider : IRemoteMetadataProvider<Series, SeriesInfo>,
        IRemoteMetadataProvider<Movie, MovieInfo>, IRemoteMetadataProvider<Trailer, TrailerInfo>
    {
        private readonly IJsonSerializer _jsonSerializer;
        private readonly IHttpClient _httpClient;
        private readonly ILogger _logger;

        public OmdbItemProvider(IJsonSerializer jsonSerializer, IHttpClient httpClient, ILogger logger)
        {
            _jsonSerializer = jsonSerializer;
            _httpClient = httpClient;
            _logger = logger;
        }

        public string Name
        {
            get { return "IMDb via The Open Movie Database"; }
        }

        public async Task<MetadataResult<Series>> GetMetadata(SeriesInfo info, CancellationToken cancellationToken)
        {
            var result = new MetadataResult<Series>
            {
                Item = new Series()
            };

            var imdbId = info.GetProviderId(MetadataProviders.Imdb);

            if (string.IsNullOrEmpty(imdbId))
            {
                var searchResult = await GetSeriesImdbId(info, cancellationToken).ConfigureAwait(false);

                imdbId = searchResult.Item1;

                if (!string.IsNullOrEmpty(searchResult.Item2))
                {
                    result.Item.SetProviderId(MetadataProviders.Tvdb, searchResult.Item2);
                }
            }
            
            if (!string.IsNullOrEmpty(imdbId))
            {
                result.Item.SetProviderId(MetadataProviders.Imdb, imdbId);
                result.HasMetadata = true;

                await new OmdbProvider(_jsonSerializer, _httpClient).Fetch(result.Item, imdbId, cancellationToken)
                        .ConfigureAwait(false);
            }

            return result;
        }

        public Task<MetadataResult<Movie>> GetMetadata(MovieInfo info, CancellationToken cancellationToken)
        {
            return GetMovieResult<Movie>(info, cancellationToken);
        }

        public Task<MetadataResult<Trailer>> GetMetadata(TrailerInfo info, CancellationToken cancellationToken)
        {
            var result = new MetadataResult<Trailer>();

            if (info.IsLocalTrailer)
            {
                return Task.FromResult(result);
            }

            return GetMovieResult<Trailer>(info, cancellationToken);
        }

        private async Task<MetadataResult<T>> GetMovieResult<T>(ItemLookupInfo info, CancellationToken cancellationToken)
            where T : Video, new()
        {
            var result = new MetadataResult<T>
            {
                Item = new T()
            };

            var imdbId = info.GetProviderId(MetadataProviders.Imdb);

            if (string.IsNullOrEmpty(imdbId))
            {
                var searchResult = await GetMovieImdbId(info, cancellationToken).ConfigureAwait(false);

                imdbId = searchResult.Item1;

                if (!string.IsNullOrEmpty(searchResult.Item2))
                {
                    result.Item.SetProviderId(MetadataProviders.Tmdb, searchResult.Item2);
                }
            }

            if (!string.IsNullOrEmpty(imdbId))
            {
                result.Item.SetProviderId(MetadataProviders.Imdb, imdbId);
                result.HasMetadata = true;

                await new OmdbProvider(_jsonSerializer, _httpClient).Fetch(result.Item, imdbId, cancellationToken)
                        .ConfigureAwait(false);
            }

            return result;
        }

        private async Task<Tuple<string, string>> GetMovieImdbId(ItemLookupInfo info, CancellationToken cancellationToken)
        {
            var result = await new GenericMovieDbInfo<Movie>(_logger, _jsonSerializer).GetMetadata(info, cancellationToken)
                        .ConfigureAwait(false);

            var imdb = result.HasMetadata ? result.Item.GetProviderId(MetadataProviders.Imdb) : null;
            var tmdb = result.HasMetadata ? result.Item.GetProviderId(MetadataProviders.Tmdb) : null;

            return new Tuple<string, string>(imdb, tmdb);
        }

        private async Task<Tuple<string,string>> GetSeriesImdbId(SeriesInfo info, CancellationToken cancellationToken)
        {
            var result = await TvdbSeriesProvider.Current.GetMetadata(info, cancellationToken)
                   .ConfigureAwait(false);

            var imdb = result.HasMetadata ? result.Item.GetProviderId(MetadataProviders.Imdb) : null;
            var tvdb = result.HasMetadata ? result.Item.GetProviderId(MetadataProviders.Tvdb) : null;

            return new Tuple<string, string>(imdb, tvdb);
        }
    }
}