using System;
using System.Text.RegularExpressions;
using Crestron.SimplSharp;
using System.Collections.Generic;
using Crestron.SimplSharp.CrestronIO;
using Crestron.SimplSharp.CrestronDataStore;
using Crestron.SimplSharpPro;

using PepperDash.Core;
using PepperDash.Essentials.License;

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json.Schema;


namespace PepperDash.Essentials.Core
{
	public static class Global
	{
		public static CrestronControlSystem ControlSystem { get; set; }

		public static LicenseManager LicenseManager { get; set; }

        public static Dictionary<short, EthernetAdapterInfo> EthernetAdapterInfoCollection {get; private set;}

        /// <summary>
        /// The file path prefix to the folder containing configuration files
        /// </summary>
        public static string FilePathPrefix { get; private set; }

        /// <summary>
        /// The file path prefix to the applciation directory
        /// </summary>
        public static string ApplicationDirectoryPathPrefix 
        {
            get
            {
                return Crestron.SimplSharp.CrestronIO.Directory.GetApplicationDirectory();
            }
        }

        /// <summary>
        /// Returns the directory separator character based on the running OS
        /// </summary>
        public static char DirectorySeparator
        {
            get
            {
                return System.IO.Path.DirectorySeparatorChar;
            }
        }

        /// <summary>
        /// Wildcarded config file name for global reference
        /// </summary>
        public const string ConfigFileName = "*configurationFile*.json";

        /// <summary>
        /// Sets the file path prefix
        /// </summary>
        /// <param name="prefix"></param>
        public static void SetFilePathPrefix(string prefix)
        {
            FilePathPrefix = prefix;
        }

        static string _AssemblyVersion;

        /// <summary>
        /// Gets the Assembly Version of Essentials
        /// </summary>
        /// <returns>The Assembly Version at Runtime</returns>
        public static string AssemblyVersion
        {
            get
            {
                return _AssemblyVersion;
            }
            private set
            {
                _AssemblyVersion = value;
            }
        }

        /// <summary>
        /// Sets the Assembly version to the version of the Essentials Library
        /// </summary>
        /// <param name="assemblyVersion"></param>
        public static void SetAssemblyVersion(string assemblyVersion)
        {
            AssemblyVersion = assemblyVersion;
        }

        /// <summary>
        /// Checks to see if the running version meets or exceed the minimum specified version.  For beta versions (0.xx.yy), will always return true.
        /// </summary>
        /// <param name="minimumVersion">Minimum specified version in format of xx.yy.zz</param>
        /// <returns>Returns true if the running version meets or exceeds the minimum specified version</returns>
        public static bool IsRunningMinimumVersionOrHigher(string minimumVersion)
        {
            Debug.Console(2, "Comparing running version '{0}' to minimum version '{1}'", AssemblyVersion, minimumVersion);

            if (String.IsNullOrEmpty(minimumVersion))
            {
                Debug.Console(0,"Plugin does not specify a minimum version. Loading plugin may not work as expected. Proceeding with loading plugin");
                return true;
            }
            
            var runtimeVersion = Regex.Match(AssemblyVersion, @"^(\d*).(\d*).(\d*).*");

            var runtimeVersionMajor = Int16.Parse(runtimeVersion.Groups[1].Value);
            var runtimeVersionMinor = Int16.Parse(runtimeVersion.Groups[2].Value);
            var runtimeVersionBuild = Int16.Parse(runtimeVersion.Groups[3].Value);

            var runtimeVer = new Version(runtimeVersionMajor, runtimeVersionMinor, runtimeVersionBuild);

            Version minimumVer;
            try
            {
                minimumVer = new Version(minimumVersion);
            }
            catch
            {
                Debug.Console(2, "unable to parse minimum version {0}. Bypassing plugin load.", minimumVersion);
                return false;
            }


            // Check for beta build version
            if (runtimeVer.Major != 0)
            {
                return runtimeVer.CompareTo(minimumVer) >= 0;
            }

            Debug.Console(2, "Running Local Build.  Bypassing Dependency Check.");
            return true;

            /*
            var minVersion = Regex.Match(minimumVersion, @"^(\d*).(\d*).(\d*)$");

            if(!minVersion.Success)
            {
                
            }

            var minVersionMajor = Int16.Parse(minVersion.Groups[1].Value);
            var minVersionMinor = Int16.Parse(minVersion.Groups[2].Value);
            var minVersionBuild = Int16.Parse(minVersion.Groups[3].Value);



            if (minVersionMajor > runtimeVersionMajor)
                return false;

            if (minVersionMinor > runtimeVersionMinor)
                return false;

            if (minVersionBuild > runtimeVersionBuild)
                return false;

            return true;
             */
        }



		static Global()
		{
			// Fire up CrestronDataStoreStatic
			var err = CrestronDataStoreStatic.InitCrestronDataStore();
			if (err != CrestronDataStore.CDS_ERROR.CDS_SUCCESS)
			{
				CrestronConsole.PrintLine("Error starting CrestronDataStoreStatic: {0}", err);
				return;
			}

            GetEthernetInformation();

		}

        /// <summary>
        /// Populates EthernetInformationCollection
        /// </summary>
        static void GetEthernetInformation()
        {

            EthernetAdapterInfoCollection = new Dictionary<short, EthernetAdapterInfo>();

            EthernetAdapterType adapterType = EthernetAdapterType.EthernetUnknownAdapter;

            List<EthernetAdapterType> adapters = new List<EthernetAdapterType>() 
                { EthernetAdapterType.EthernetLANAdapter, EthernetAdapterType.EthernetLAN2Adapter, EthernetAdapterType.EthernetCSAdapter, EthernetAdapterType.EthernetWIFIAdapter };

            foreach (var adapter in adapters)
            {
                try
                {
                    adapterType = EthernetAdapterType.EthernetLANAdapter;

                    var adapterId = CrestronEthernetHelper.GetAdapterdIdForSpecifiedAdapterType(adapterType);

                    var adapterInfo = GetEthernetAdapterProperties(adapterId, adapterType);

                    EthernetAdapterInfoCollection.Add(adapterId, adapterInfo);
                }
                catch (Exception e)
                {
                    if (e is System.ArgumentException)
                    {
                        Debug.Console(1, "Error: {0} not present", adapterType);
                    }
                    else
                    {
                        Debug.Console(1, "Error: {0}", e);
                    }
                }
            }

        }


        static EthernetAdapterInfo GetEthernetAdapterProperties(short adapterId, EthernetAdapterType adapterType)
        {
            EthernetAdapterInfo adapterInfo = new EthernetAdapterInfo();

            adapterInfo.Type = adapterType;
            adapterInfo.DhcpIsOn = CrestronEthernetHelper.GetEthernetParameter(CrestronEthernetHelper.ETHERNET_PARAMETER_TO_GET.GET_CURRENT_DHCP_STATE, adapterId) == "on" ? true : false;
            adapterInfo.Hostname = CrestronEthernetHelper.GetEthernetParameter(CrestronEthernetHelper.ETHERNET_PARAMETER_TO_GET.GET_HOSTNAME, adapterId);
            adapterInfo.MacAddress = CrestronEthernetHelper.GetEthernetParameter(CrestronEthernetHelper.ETHERNET_PARAMETER_TO_GET.GET_MAC_ADDRESS, adapterId);
            adapterInfo.IpAddress = CrestronEthernetHelper.GetEthernetParameter(CrestronEthernetHelper.ETHERNET_PARAMETER_TO_GET.GET_CURRENT_IP_ADDRESS, adapterId);
            adapterInfo.Subnet = CrestronEthernetHelper.GetEthernetParameter(CrestronEthernetHelper.ETHERNET_PARAMETER_TO_GET.GET_CURRENT_IP_MASK, adapterId);
            adapterInfo.Gateway = CrestronEthernetHelper.GetEthernetParameter(CrestronEthernetHelper.ETHERNET_PARAMETER_TO_GET.GET_CURRENT_ROUTER, adapterId);
            adapterInfo.Domain = CrestronEthernetHelper.GetEthernetParameter(CrestronEthernetHelper.ETHERNET_PARAMETER_TO_GET.GET_DOMAIN_NAME, adapterId);

            string dns = CrestronEthernetHelper.GetEthernetParameter(CrestronEthernetHelper.ETHERNET_PARAMETER_TO_GET.GET_DNS_SERVER, adapterId);
            if (dns.Contains(","))
            {
                string[] dnsList = dns.Split(',');
                for (var i = 0; i < dnsList.Length; i++)
                {
                    if (i == 0)
                        adapterInfo.Dns1 = !string.IsNullOrEmpty(dnsList[0]) ? dnsList[0] : "0.0.0.0";
                    if (i == 1)
                        adapterInfo.Dns2 = !string.IsNullOrEmpty(dnsList[1]) ? dnsList[1] : "0.0.0.0";
                    if (i == 2)
                        adapterInfo.Dns3 = !string.IsNullOrEmpty(dnsList[2]) ? dnsList[2] : "0.0.0.0";
                }
            }
            else
            {
                adapterInfo.Dns1 = !string.IsNullOrEmpty(dns) ? dns : "0.0.0.0";
                adapterInfo.Dns2 = "0.0.0.0";
                adapterInfo.Dns3 = "0.0.0.0";
            }

            return adapterInfo;
        }
	}
}