using Step.Model.DTOModels;
using Step.NC;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using static CMS_CORE_Library.DataStructures;
using static Step.Config.ServerConfig;
using static Step.Model.Constants;
using static Step.Utils.LanguageController;

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, Softkey, Plc Alarm translations
            Dictionary<string, string> maintenance = GetLocalizeMaintenanceName(language);
            Dictionary<string, string> softKeys = GetLocalizedSoftKeysNames(language);
            Dictionary<string, string> alarms = GetPlcAlarmsTranslations(language);

            // Concat maintenances dictionary with translations dictionary
            translations = translations.Concat(maintenance).ToDictionary(x => x.Key, x => x.Value);
            translations = translations.Concat(softKeys).ToDictionary(x => x.Key, x => x.Value);
            translations = translations.Concat(alarms).ToDictionary(x => x.Key, x => x.Value);
            
            if (translations == null)
                return InternalServerError();

            return Ok(translations);
        }

        private static Dictionary<string, string> GetLocalizeMaintenanceName(string language)
        {
            return MaintenancesConfig
                .ToDictionary(
                x => MAINTENANCE_PREFIX_ID + x.Id.ToString(), // Prefix + maintenance id
                x => GetValueFromMaintenanceNameList(x.LocalizedNames, language, "Maintenance_" + x.Id)
                );
        }

        private static Dictionary<string, string> GetLocalizedSoftKeysNames(string language)
        {
            return SoftKeysConfig
                .ToDictionary(
                x => SOFTKEY_PREFIX_ID + x.Id.ToString(), // PREFIX + softkey Id
                x => GetValueFromMaintenanceNameList(x.LocalizedNames, language, "SoftKey_" + x.Id)
                );
        }

        private static string GetValueFromMaintenanceNameList(Dictionary<string, string> localizedNames, string language, string defaultString)
        {
            // Find text from names by language id
            var value = localizedNames.Where(y => y.Key == language).FirstOrDefault();
            // Set default value
            if (value.Key == null)
                return defaultString;
            else
                return value.Value;
        }

        private static Dictionary<string, string> GetPlcAlarmsTranslations(string language)
        {
            using (NcHandler ncHandler = new NcHandler())
            {
                CmsError cmsError = ncHandler.Connect();
                Dictionary<string, string> returnValue = new Dictionary<string, string>();

                Dictionary<int, string> messages = new Dictionary<int, string>();
                // Read data from CN
                cmsError = ncHandler.numericalControl.NC_GetTranslatedPlcMessages(language, ref messages);
                
                // Id start from 1
                for(int i = 1; i <= 1024; i++)
                {
                    // Get configurated alarms
                    var tmpAlarmConfig = InitialAlarmsConfig.Where(x => x.PlcId == i).FirstOrDefault();
                    // Default string
                    string message = "Alarm_id_" + i + ": Message not configurated";
                    // If is configurated
                    if (tmpAlarmConfig != null)
                    {
                        // Find translated string
                        message = messages.Where(x => x.Key == tmpAlarmConfig.AlarmId).FirstOrDefault().Value;
                        if (message == null)
                            message = "Alarm_id_" + i + ": Message not found";
                    }
                    // Add to dictionary
                    returnValue.Add(
                            ALARM_PREFIX + i,
                            message
                            );
                }
                return returnValue;
            }
        }
    }
}