using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml.Linq;
using AppRes = Eugen.ESystem.IO.Properties.AppResources;

namespace Eugen.ESystem.IO
{
    public class SaveXMLFile
    {
        #region Version und Copyright
        // Version und Copyright
        static string dllName = Path.GetFileNameWithoutExtension(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase); //Den Programmnamen auslesen
        static string dllVersion = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();
        static object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCopyrightAttribute), false);
        static string copyright = GenerateCopyright();

        //Assembly Datum und Zeit
        static DateTime value = AssemblyDateTime();
        static string date = value.ToShortDateString();
        static string time = value.ToLongTimeString();

        private static DateTime AssemblyDateTime()
        {
            var version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
            var buildDateTime = new DateTime(2000, 1, 1).Add(new TimeSpan(TimeSpan.TicksPerDay * version.Build + TimeSpan.TicksPerSecond * 2 * version.Revision));
            //Tage seit dem 1. Januar 2000 und Sekunden seit Mitternacht, (multiplizier mit 2 ergibt das Original)
            return buildDateTime;
        }

        private static string CurrentYear()
        {
            DateTime dtn = DateTime.Now;
            return dtn.Year.ToString();
        }

        private static string StartYear()
        {
            string startYear = "";
            if (((AssemblyCopyrightAttribute)attributes[0]).Copyright.Contains("Copyright © "))
            {
                startYear = ((AssemblyCopyrightAttribute)attributes[0]).Copyright.Replace("Copyright © ", "");
                while (startYear.StartsWith(" "))
                {
                    startYear = startYear.Remove(0, 1);
                }

                if (startYear.Contains("-"))
                {
                    startYear = startYear.Remove(startYear.IndexOf("-"));
                }
                else
                {
                    startYear = startYear.Remove(startYear.IndexOf(" "));
                }
                return startYear;
            }
            else
            {
                DateTime dtn = DateTime.Now;
                return dtn.Year.ToString();
            }
        }

        private static string GenerateCopyright()
        {
            string startYear = StartYear();
            string currentYear = CurrentYear();

            if (startYear == currentYear)
            {
                return ((AssemblyCopyrightAttribute)attributes[0]).Copyright;
            }
            else
            {
                string temp = ((AssemblyCopyrightAttribute)attributes[0]).Copyright;
                string start = temp.Remove(temp.IndexOf(startYear) - 1);
                string end = (temp.Remove(0, temp.IndexOf(" by")));

                return String.Concat(start, " ", startYear, "-", currentYear, end);
            }
        }
        #endregion

        #region DLL-Info
        /// <summary>
        /// Contains the name of the dll file.
        /// </summary>
        public static string DllName { private set; get; }

        /// <summary>
        /// Contains the version of the dll file.
        /// </summary>
        public static string DllVersion { private set; get; }

        /// <summary>
        /// Contains the copyright notice.
        /// </summary>
        public static string Copyright { private set; get; }

        /// <summary>
        /// Contains the name-, version- and copyright-information of the dll file.
        /// </summary>
        public static string[] DllInfo { private set; get; }

        private static void SetDllInfo()
        {
            //Name, Version und Copyright setzen
            DllName = dllName;
            DllVersion = dllVersion;
            Copyright = copyright;

            string[] dllInfo = new string[3];
            dllInfo[0] = dllName;
            dllInfo[1] = dllVersion;
            dllInfo[2] = copyright;
            DllInfo = dllInfo;
        }

        protected string ProgramName { private set; get; }
        protected string ProgramVersion { private set; get; }
        protected string ProgramCopyright { private set; get; }
        #endregion

        static SaveXMLFile()
        {
            SetDllInfo();
        }

        public SaveXMLFile()
        {
            SetDllInfo();
        }

        public enum multigroupFile
        {
            No,
            Yes
        }

        public string FileName { get; set; }
        public multigroupFile MultiGroupFile { get; set; }
        public string Topic = ""; //z.B. "NX-Portal"
        public string Group { get; set; } //z.B. "NX"
        public string Key { get; set; } //z.B. "Key"
        public string[] Values { get; set; } //z.B. "NX 1953"
        public string[] Standard { get; set; } //"yes" oder "no"
        public int StandardNr { get; set; } //z.B. "2"

        private void SaveSingleGroupFile()
        {
            //Namensraum definieren
            XNamespace ns = "https://www.engelglobal.com/de/at/index.html";

            //Wurzelelement erzeugen
            XElement rootElement = new XElement(ns + Topic);

            //Namensraum als Attribut angeben
            rootElement.Add(new XAttribute("xmlns", ns));

            //Der Wert
            for (int id = 0; id < Values.Length; id++)
            {
                XElement groupElement = new XElement(ns + Group);
                groupElement.Add(new XAttribute("Id", id + 1));
                groupElement.Add(new XAttribute(Key, Values[id]));
                if (StandardNr == id + 1)
                {
                    groupElement.Add(new XAttribute("Standard", "yes"));
                }
                else
                {
                    groupElement.Add(new XAttribute("Standard", "no"));
                }

                rootElement.Add(groupElement);
            }

            rootElement.Save(FileName);

            MessageBox.Show(AppRes.msgBoxTxt001, AppRes.msgBoxCapt001, MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

        private void SaveMultiGroupFile(string[,] values)
        {
            //Namensraum definieren
            XNamespace ns = "https://www.engelglobal.com/de/at/index.html";

            //Wurzelelement erzeugen
            XElement rootElement = new XElement(ns + Topic);

            //Namensraum als Attribut angeben
            rootElement.Add(new XAttribute("xmlns", ns));

            //Der Wert
            for (int id = 0; id < values.Length / 5; id++)
            {
                XElement groupElement = new XElement(ns + values[id, 0]);
                groupElement.Add(new XAttribute("Id", values[id, 1]));
                groupElement.Add(new XAttribute(values[id, 2], values[id, 3]));
                groupElement.Add(new XAttribute("Standard", values[id, 4]));

                rootElement.Add(groupElement);
            }

            rootElement.Save(FileName);

            MessageBox.Show(AppRes.msgBoxTxt001, AppRes.msgBoxCapt001, MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

        public void Save()
        {
            if (MultiGroupFile == multigroupFile.Yes)
            {
                //XML in collecton laden
                var loadXML = new LoadXMLFile();
                loadXML.FileName = FileName;
                loadXML.Topic = Topic;
                loadXML.Group = Group;
                loadXML.Key = Key;
                loadXML.LoadAllValues = LoadXMLFile.LoadAll.Yes;
                loadXML.Load();
                string[,] collection = loadXML.Values;

                bool exist = false;
                if (loadXML.Values != null)
                {
                    List<List<string>> lafter = new List<List<string>>();
                    List<List<string>> lmiddle = new List<List<string>>();
                    List<List<string>> lbefore = new List<List<string>>();

                    for (int i = 0; i < loadXML.Values.Length / 5; i++)
                    {
                        if (loadXML.Values[i, 0] == Group)
                        {
                            exist = true;
                            //Die alten Werte igrorieren, weil diese durch die neuen Werte ersetzt und nachher in die 'Gruppe_mitte' aufgenommen werden
                        }
                        else
                        {
                            if (exist)
                            {
                                //Die Werte in die 'Gruppe_danach' aufnehmen
                                List<string> iafter = new List<string>();
                                
                                iafter.Add(loadXML.Values[i, 0]);
                                iafter.Add(loadXML.Values[i, 1]);
                                iafter.Add(loadXML.Values[i, 2]);
                                iafter.Add(loadXML.Values[i, 3]);
                                iafter.Add(loadXML.Values[i, 4]);

                                lafter.Add(iafter);
                            }
                            else
                            {
                                //Die Werte in die 'Gruppe_davor' aufnehmen
                                List<string> ibefore = new List<string>();
                                
                                ibefore.Add(loadXML.Values[i, 0]);
                                ibefore.Add(loadXML.Values[i, 1]);
                                ibefore.Add(loadXML.Values[i, 2]);
                                ibefore.Add(loadXML.Values[i, 3]);
                                ibefore.Add(loadXML.Values[i, 4]);

                                lbefore.Add(ibefore);
                            }
                        }
                    }

                    //Die Werte in die 'Gruppe_mitte' aufnehmen
                    for (int j = 0; j < Values.Length; j++)
                    {
                        List<string> imiddle = new List<string>();

                        imiddle.Add(Group); //z.B.: 'NX'
                        imiddle.Add((j + 1).ToString()); //Id, z.B.: '2'
                        imiddle.Add(Key); //z.B.: 'Version'
                        imiddle.Add(Values[j]); //z.B.: 'NX 2312'
                        imiddle.Add(Standard[j]); //Standard, z.B.: 'yes'
                        
                        lmiddle.Add(imiddle);
                    }

                    //Gruppe_davor + Gruppe_mitte + Gruppe_danach

                    //Gesamtlänge ermitteln
                    int cbefore = lbefore.Count;
                    int cmiddle = lmiddle.Count;
                    int cafter = lafter.Count;
                    string[,] values = new string[lbefore.Count + cmiddle + lafter.Count, 5];

                    //'Gruppe_davor' einfügen
                    if (lbefore.Count > 0)
                    {
                        for (int i = 0; i < lbefore.Count; i++)
                        {
                            int j = 0;
                            foreach (var item in lbefore[i])
                            {
                                values[i, j] = item;
                                j++;
                            }
                        }
                    }

                    //TODO:
                    //'Gruppe_mitte' einfügen
                    if (cmiddle > 0)
                    {
                        for (int i = lbefore.Count; i < lbefore.Count + cmiddle; i++)
                        {
                            int j = 0;
                            foreach (var item in lmiddle[i])
                            {
                                values[i, j] = item;
                                j++;
                            }
                        }
                    }

                    //'Gruppe_danach' einfügen
                    if (lafter.Count > 0)
                    {
                        int i = lbefore.Count + cmiddle;
                        foreach (var itema in lafter)
                        {
                            int j = 0;
                            foreach (var item in itema)
                            {
                                values[i, j] = item;
                                j++;
                            }
                            i++;
                        }
                    }

                    //Speichern
                    SaveMultiGroupFile(values);
                }
            }
            else
            {
                //Speichern
                SaveSingleGroupFile();
            }
        }

        private string[,] LoadXML()
        {
            var load = new LoadXMLFile();
            load.FileName = FileName;
            load.Topic = Topic;
            load.Group = Group;
            load.Key = Key;
            load.LoadAllValues = LoadXMLFile.LoadAll.Yes; //Es werden alle Elemente geladen
            load.Load();

            return load.Values;
        }
    }
}