using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web.Http;
using Step.Model.ConfigModels;
using Step.Model.DTOModels;
using static Step.Config.ServerConfig;
using static Step.Utils.LanguageController;
using static Step.Utils.Constants;

namespace Step.Controllers.WebApi
{
    [RoutePrefix("api/language")]
    public class LanguageController : ApiController
    {
        [Route("languages"), HttpGet]
        public IHttpActionResult GetLanguageList()
        {
            List<DTOLanguageModel> availableLanguages = GetLanguageListFromDirectory();
            if (availableLanguages == null)
                return NotFound();

            return Ok(availableLanguages);
        }
        
        [Route("{language}"), HttpGet()]
        public IHttpActionResult GetTranslations(string language)
        {
            if (!IsValidLanguage(language))
                return BadRequest("Language not exists");

            if (!LanguageIsAvailable(language))
                return NotFound();

            Dictionary<string, string> translations = GetTranslationsFromFile(language);

            // Get Maintenance translations
            Dictionary<string, string> maintenance = GetLocalizeMaintenanceName(language, MaintenancesConfig);

            // Concat 2 array
            translations = translations.Concat(maintenance).ToDictionary(x => x.Key, x => x.Value);

            if (translations == null)
                return InternalServerError();

            return Ok(translations);
        }


        public static Dictionary<string, string> GetLocalizeMaintenanceName(string language, List<MaintenanceConfigModel> maitenancesConfig)
        {
            Dictionary<string, string> returnDictionary = new Dictionary<string, string>();

            return MaintenancesConfig
                .ToDictionary(
                x => MAINTENANCE_PREFIX_ID + x.Id.ToString(),
                x => GetValueFromMaintenanceNameList(x.LocalizedNames, language, x.Id)
                );
        }

        public static string GetValueFromMaintenanceNameList(Dictionary<string, string> localizedNames, string language, int maintenanceId)
        {
            // Find text from names by language id
            var value = localizedNames.Where(y => y.Key == language).FirstOrDefault();
            // Set default value 
            if (value.Key == null)
                return "Maintenance string not found for id: " + maintenanceId;
            else
                return value.Value;
        }
    }
}