using System;
using System.Xml.Schema;
using System.Xml.Linq;
using System.Linq;
using static Step.Config.StartupConfig;
using Step.Model.ConfigModels;
using static Step.Utils.Constants;
using Step.Utils;

namespace Step.Config
{
    public static class StartupConfigController
    {
        public static void ReadStartupConfig()
        {
            // Read validation file
            XmlSchemaSet readerSettings = new XmlSchemaSet();

            try
            {
                // Add Schema
                readerSettings.Add(null, Environment.CurrentDirectory + "\\" + STARTUP_CONFIG_SCHEMA_PATH);
                // Open file reader
                XDocument xmlConfigFile = XDocument.Load(Environment.CurrentDirectory + "\\" + STARTUP_CONFIG_PATH);
                // Validate file
                xmlConfigFile.Validate(readerSettings, ValidationHandler);

                // Read nc Config with LINQ
                NcConfig = xmlConfigFile
                    .Descendants(NC_CONFIG_KEY)
                    .Select(x => new NcConfigModel()
                    {
                        NcVendor = Convert.ToInt32(x.Element("ncVendor").Value),
                        NcIpAddress = x.Element("ncIpAddress").Value,
                        NcPort = Convert.ToInt32(x.Element("ncPort").Value)
                    }).FirstOrDefault();

                // Read server config with LINQ and save into static config
                ServerConfig = xmlConfigFile
                    .Descendants(SERVER_CONFIG_KEY)
                    .Select(x => new ServerConfigModel()
                    {   // Set server config model data
                    Language = x.Element("language").Value,
                        ServerPort = Convert.ToInt32(x.Element("serverPort").Value),
                        EnableDirectoryBrowsing = Convert.ToBoolean(x.Element("enableDirectoryBrowsing").Value)
                    }).FirstOrDefault();

                // Read areas config with LINQ
                xmlConfigFile
                    .Descendants(AREAS_CONFIG_KEY) // Get areas config node
                    .Elements()
                    .ToList()
                    .ForEach(x => SetAreaValueByName(x)); // Loop through elements

            } catch (Exception ex)
            {
                ExceptionManager.Manage(ex);
            }
        }

        private static void SetAreaValueByName(XElement element)
        {
            // Choose which area to be set
            switch (element.Name.ToString())
            {
                case AREAS.PRODUCTION_KEY:
                        SetAreaValue(ref ProductionConfig, element);
                    break;
                case AREAS.TOOLING_KEY:
                        SetAreaValue(ref ToolingConfig, element);
                    break;
                case AREAS.REPORT_KEY:
                        SetAreaValue(ref ReportConfig, element);
                    break;
                case AREAS.ALARMS_KEY:
                        SetAreaValue(ref AlarmsConfig, element);
                    break;
                case AREAS.MAINTENANCE_KEY:
                        SetAreaValue(ref MaintenanceConfig, element);
                    break;
                case AREAS.UTILITIES_KEY:
                        SetAreaValue(ref UtilitiesConfig, element);
                    break;
                case AREAS.SCADA_KEY:
                        SetAreaValue(ref ScadaConfig, element);
                    break;
            }
        }

        private static void SetAreaValue (ref AreasConfigModel areasConfig, XElement element)
        {
            // Set area model with xml data
            areasConfig = new AreasConfigModel()
            {
                Name = element.Name.ToString(),
                Enabled = Convert.ToBoolean(element.Element("enabled").Value),
                AllowExternalBrowser = Convert.ToBoolean(element.Element("allowExternalBrowser").Value)
            };
        }

        private static void ValidationHandler(object sender, ValidationEventArgs e)
        {
            if (e.Severity == XmlSeverityType.Warning)
            {
                ExceptionManager.Manage(ERROR_LEVEL.WARNING, e.Message);
            }
            else if (e.Severity == XmlSeverityType.Error)
            {
                ExceptionManager.Manage(ERROR_LEVEL.FATAL, e.Message);
            }
        }

        public static bool CheckAreaStatus(string areaName)
        {   // Get Area status ( enabled field) by name
            switch (areaName)
            {
                case AREAS.PRODUCTION_KEY:
                    return ProductionConfig.Enabled;
                case AREAS.TOOLING_KEY:
                    return ToolingConfig.Enabled;
                case AREAS.REPORT_KEY:
                    return ProductionConfig.Enabled;
                case AREAS.ALARMS_KEY:
                    return AlarmsConfig.Enabled;
                case AREAS.MAINTENANCE_KEY:
                    return MaintenanceConfig.Enabled;
                case AREAS.UTILITIES_KEY:
                    return UtilitiesConfig.Enabled;
                case AREAS.SCADA_KEY:
                    return ScadaConfig.Enabled;
                default:
                    return false;
            }
        }
    }
}