using Sony.Filtr.Applications;
using Sony.Filtr.Contracts.Entities;
using Sony.Filtr.Core;
using Sony.Filtr.Globalization;
using System.Globalization;
using System.Linq;
using Sony.Filtr.AdminAPI.Modules;
using Sony.Filtr.Contracts.Entities.Genre;
using Sony.Filtr.Core.Genres;

namespace Sony.Filtr.AdminAPI.BusinessLogic
{
    public class ApplicationsLogic
    {
        private readonly ApplicationInstanceManager _applicationInstanceManager;
        private readonly GenreManager _genreManager;
        private readonly GlobalizationHandler _globalizationHandler;

        public ApplicationsLogic(ApplicationInstanceManager applicationInstanceManager, GenreManager genreManager, GlobalizationHandler globalizationHandler)
        {
            _applicationInstanceManager = applicationInstanceManager;
            _genreManager = genreManager;
            _globalizationHandler = globalizationHandler;
        }

        public Application SaveApplication(ApplicationViewModel applicationViewModel)
        {
            Application application;
            bool adding = false;
            if (applicationViewModel.Id.HasValue && applicationViewModel.Id.Value != default(int))
            {
                application = _applicationInstanceManager.GetApplication(applicationViewModel.Id.Value);
            }
            else
            {
                application = new Application();
                adding = true;
            }
            application.Name = applicationViewModel.Name;
            application.CultureInfo = new CultureInfo(applicationViewModel.CultureInfo);
            application.SpotifyRegionCode = applicationViewModel.SpotifyRegionCode.ToLowerInvariant();
            application.GACountryName = applicationViewModel.GACountryName;
            application.Active = applicationViewModel.Active;
            application.WorkoutMarket = applicationViewModel.WorkoutMarket;
            application.IncludeOtherPlaylists = applicationViewModel.IncludeOtherPlaylists;
            application.Services = applicationViewModel.Services;
            application.DefaultService = applicationViewModel.DefaultService;

            application = _applicationInstanceManager.SaveApplication(application);
            if (adding)
            {
                CopyTags(application);
                CopyLanguage(application);
            }

            return application;
        }

        private void CopyLanguage(Application application)
        {
            var fallbackApp = _applicationInstanceManager.GetFallbackApplication();
            var langCode = application.CultureInfo.TwoLetterISOLanguageName;
            if (langCode == fallbackApp.CultureInfo.TwoLetterISOLanguageName)
                return;

            var existingTranslations = _globalizationHandler.GetTranslations(application.CultureInfo);
            if (existingTranslations.Any(t => !string.IsNullOrEmpty(t.Value)))
                return;

            var allTranslations = _globalizationHandler.GetTranslations(fallbackApp);
            foreach (var allTranslation in allTranslations)
            {
                _globalizationHandler.SetTranslation(allTranslation.Key, application, allTranslation.Value);
            }
        }

        private void CopyTags(Application application)
        {
            var existing = _genreManager.GetGenres(application);
            if (existing.Any())
                return;

            var global = _applicationInstanceManager.GetFallbackApplication();
            var globalGenres = _genreManager.GetGenres(global);
            foreach (var globalGenre in globalGenres)
            {
                Genre genre = new Genre();
                genre.Name = globalGenre.Name;
                genre.ApplicationID = application.ID;
                genre.GenreCategoryID = globalGenre.GenreCategoryID;
                genre.LastFMTag = globalGenre.LastFMTag;
                genre.Active = globalGenre.Active;
                _genreManager.SaveGenre(genre);
            }
        }
    }
}