using System.Collections.Generic;
using System.Linq;
using System.Globalization;
using Globalization;
using Sony.Filtr.Contracts.Definitions;
using Sony.Filtr.Contracts.Entities;
using Sony.Filtr.Core.LastModified;
using Sony.Filtr.DistributedCaching;
using Sony.Filtr.ErrorLogging;

namespace Sony.Filtr.Globalization
{
    public class GlobalizationHandler
    {
        private readonly GlobalizationFactory _factory;
        private readonly LastModifiedManager _lastModifiedManager;
        private readonly DistributedCacheHandler _cacheHandler;

        public GlobalizationHandler(GlobalizationFactory globalizationFactory, DistributedCacheHandler distributedCacheHandler, LastModifiedManager lastModifiedManager)
        {
            _factory = globalizationFactory;
            _lastModifiedManager = lastModifiedManager;
            _cacheHandler = distributedCacheHandler;
        }

        private Dictionary<string, Dictionary<CultureInfo, string>> GetTranslations()
        {
            var translations = (Dictionary<string, Dictionary<CultureInfo, string>>)_cacheHandler.Get(GetCacheKey());
            if (translations == null)
            {
                translations = _factory.GetTranslations();
                _cacheHandler.Put(GetCacheKey(), translations);
            }
            return translations;
        }

        public void SetTranslation(string key, Application application, string value)
        {
            _factory.SetTranslation(key, application, value);

            _lastModifiedManager.SetLastModifyDate(application, EntityType.Globalizations);
            ClearCache();
        }

        public Dictionary<string, string> GetTranslations(CultureInfo culture)
        {
            var cultureTranslations = new Dictionary<string,string>();
            foreach (var tran in GetTranslations())
	        {
                var cultureTran = tran.Value.FirstOrDefault(c => c.Key.Name == culture.Name);

                string value = string.Empty;
                if (cultureTran.Key != null)
                    value = cultureTran.Value;

                cultureTranslations.Add(tran.Key, value);
	        }
            return cultureTranslations;
        }

        public Dictionary<string, string> GetTranslations(Application application)
        {
            return GetTranslations(application.CultureInfo);
        }


        private string GetCacheKey()
        {
            return "Translations:";
        }

        private void ClearCache()
        {
            _cacheHandler.Remove(GetCacheKey());
        }
    }
}