using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace IMCS.Device.HeiDenHainBase
{
    public static class MyHelper
    {
        #region "public static methods"
        public static string CheckDncVersion(int mayor = 0, int minor = 0, int revision = 0, int build = 0)
        {
            int[] requiredVersion = new int[] { mayor, minor, revision, build };
            int[] installedVersion = null;
            string strVersionComInterface = null;
            HeidenhainDNCLib.JHMachine machine = null;
            try
            {
                machine = new HeidenhainDNCLib.JHMachine();
                strVersionComInterface = machine.GetVersionComInterface();

                if (strVersionComInterface.Contains("."))
                    installedVersion = strVersionComInterface.Split('.').Select(n => Convert.ToInt32(n)).ToArray();
                else
                    installedVersion = strVersionComInterface.Split(',').Select(n => Convert.ToInt32(n)).ToArray();

                // check if installed COM component meets minimum application requirement
                if (!CheckVersion(requiredVersion, installedVersion))
                {
                    string strRequiredVersionComInterface = requiredVersion[0] + "." +
                                                            requiredVersion[1] + "." +
                                                            requiredVersion[2] + "." +
                                                            requiredVersion[3];

                    string strInstalledVersionComInterface = installedVersion[0] + "." +
                                                             installedVersion[1] + "." +
                                                             installedVersion[2] + "." +
                                                             installedVersion[3];

                    // --- close application, because HeidenhainDNC version dos not meer minimum application requirement
                    MessageBox.Show(
                               "Your HeidenhainDNC version does not meet minimum application requirement!" + Environment.NewLine + Environment.NewLine +
                               "Installed version\t: " + strInstalledVersionComInterface + Environment.NewLine +
                               "Required version\t: " + strRequiredVersionComInterface + Environment.NewLine + Environment.NewLine +
                               "The application has to be closed." + Environment.NewLine,
                               "Verify HeidenhainDNC version",
                               MessageBoxButtons.OK,
                               MessageBoxIcon.Error);
                    Application.Exit();
                }
            }
            catch (COMException)
            {
                // --- close application, because can't use HeidenhainDNC COM component (reinstall ?)
                MessageBox.Show(
                           "Can't use HeidenhainDNC COM interface!" + Environment.NewLine +
                           "The application has to be closed." + Environment.NewLine +
                           "Please reinstall HeidenhainDNC.",
                           "Verify HeidenhainDNC version",
                           MessageBoxButtons.OK,
                           MessageBoxIcon.Error);
                Application.Exit();
            }
            catch (Exception)
            {
                // --- something went wrong by verifying HeidenhainDNC version -------- 
                DialogResult dr;
                dr = MessageBox.Show(
                                "Problem verifying HeidenhainDNC version!" + Environment.NewLine +
                                "Possibly the application can't be executed properly." + Environment.NewLine +
                                "Do you want to proceed anyway?" + Environment.NewLine,
                                "Verify HeidenhainDNC version",
                                MessageBoxButtons.YesNo,
                                MessageBoxIcon.Question);
                if (dr == System.Windows.Forms.DialogResult.No)
                    Application.Exit();
            }
            finally
            {
                if (machine != null)
                    Marshal.ReleaseComObject(machine);
            }

            return strVersionComInterface;
        }

        public static void ShowComException(int ErrorCode, string ClassName = null, string MethodName = null)
        {
            // --- build caption for COM exception message box ----------------------
            string strMessageBoxCaption = "COM Exception";
            if (!String.IsNullOrEmpty(ClassName) && !String.IsNullOrEmpty(MethodName))
                strMessageBoxCaption = ClassName + " --> " + MethodName;

            // --- build text for COM exception message box -------------------------
            string strExceptionMessage = "HRESULT: 0x" + Convert.ToString(ErrorCode, 16) + Environment.NewLine;
            HeidenhainDNCLib.DNC_HRESULT hr = (HeidenhainDNCLib.DNC_HRESULT)ErrorCode;
            strExceptionMessage += Enum.GetName(typeof(HeidenhainDNCLib.DNC_HRESULT), hr);

            // --- show message box -------------------------------------------------
            MessageBox.Show(strExceptionMessage, strMessageBoxCaption, MessageBoxButtons.OK, MessageBoxIcon.Error);
        }

        public static void ShowException(Exception ex, string ClassName = null, string MethodName = null)
        {
            // --- build caption for COM exception message box ----------------------
            string strMessageBoxCaption = "Exception";
            if (!String.IsNullOrEmpty(ClassName) && !String.IsNullOrEmpty(MethodName))
                strMessageBoxCaption = ClassName + " --> " + MethodName;

            // --- build text for COM exception message box -------------------------
            string strExceptionMessage = ".NET Exception:" + Environment.NewLine +
                                         ex.Message + Environment.NewLine;

            // --- show message box -------------------------------------------------
            MessageBox.Show(strExceptionMessage, strMessageBoxCaption, MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
        #endregion

        #region "private static methods"
        private static bool CheckVersion(int[] requiredVersion, int[] installedVersion)
        {
            if (requiredVersion.Length != 4 || installedVersion.Length != 4)
                throw (new Exception());

            for (int i = 0; i < installedVersion.Length; i++)
            {
                if (installedVersion[i] > requiredVersion[i])
                    break;

                if (installedVersion[i] == requiredVersion[i])
                    continue;

                return false;
            }

            return true;
        }
        #endregion
    }

    public class MyDirectoryEntry
    {
        public string Name { get; set; }
        public DateTime TimeStamp { get; set; }
        public double FileSize { get; set; }
        // directory entry attributes
        public bool ReadOnly { get; set; }
        public bool Hidden { get; set; }
        public bool Dir { get; set; }
        public bool System { get; set; }
        public bool Modified { get; set; }
        public bool Locked { get; set; }
    }
}