using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace PEP_Tool
{
    public static class Reader
    {
        public static string OpenFile(string Dialogname = "Datei")
        {
            OpenFileDialog dialog = new OpenFileDialog();
            dialog.RestoreDirectory = true;

            dialog.Title = $"{Dialogname} öffnen";

            dialog.Filter = "Excel Arbeitsblatt CSV|*.csv";
            dialog.ShowDialog();

            var result = dialog.FileName;

            if (string.IsNullOrEmpty(result))
                return OpenFile(Dialogname);
            else
                return result;
        }

        internal static List<string> ReadZuweisungsMoeglichkeiten()
        {
            var path = "";

            if (File.Exists(@"\\bku.db.de\db\DB_006\GLW_11\ICE-Fertigung\M2\Personaleinsatzplanung\Zuweisungen.csv")) path = @"\\bku.db.de\db\DB_006\GLW_11\ICE-Fertigung\M2\Personaleinsatzplanung\Zuweisungen.csv";
            else
                path = Properties.Settings.Default.ZuweisungenPath == "" ? OpenFile("Zuweisungen") : Properties.Settings.Default.ZuweisungenPath;

            if (!File.Exists(path)) path = OpenFile("Zuweisungen");

            if (!File.ReadAllText(path, Encoding.GetEncoding(1250)).Contains(";"))
            {
                if (path != Properties.Settings.Default.ZuweisungenPath)
                {
                    Properties.Settings.Default.ZuweisungenPath = path;
                    Properties.Settings.Default.Save();
                }

                var list = File.ReadAllLines(path, Encoding.GetEncoding(1250)).ToList();
                list.Insert(0, "");

                return list;
            }
            else
            {
                MessageBox.Show("Keine korrekte Zuweisungen-Datei ausgewählt", "Fehler", MessageBoxButton.OK, MessageBoxImage.Warning, MessageBoxResult.OK, MessageBoxOptions.ServiceNotification);
                return ReadZuweisungsMoeglichkeiten();
            }

        }


        internal static Dictionary<string, Tuple<string, string>> ReadAbteilungsNamen()
        {
            var path = "";

            if (File.Exists(@"\\bku.db.de\db\DB_006\GLW_11\ICE-Fertigung\M2\Personaleinsatzplanung\DKEYS.csv")) path = @"\\bku.db.de\db\DB_006\GLW_11\ICE-Fertigung\M2\Personaleinsatzplanung\DKEYS.csv";
            else
                path = Properties.Settings.Default.AbteilungsnamenPath == "" ? OpenFile("Abteilungsnamen") : Properties.Settings.Default.AbteilungsnamenPath;

            if (!File.Exists(path)) path = OpenFile("Abteilungsnamen");

            if (File.ReadAllLines(path).First().StartsWith("Abteilung;"))
            {
                if (path != Properties.Settings.Default.AbteilungsnamenPath)
                {
                    Properties.Settings.Default.AbteilungsnamenPath = path;
                    Properties.Settings.Default.Save();
                }


                Dictionary<string, Tuple<string, string>> list = new Dictionary<string, Tuple<string, string>>();
                foreach (var line in File.ReadAllLines(path))
                {
                    list.Add(line.Split(';')[0], new Tuple<string, string>(line.Split(';')[1], line.Split(';')[2]));
                }
                return list;
            }
            else
            {
                MessageBox.Show("Keine korrekte Abteilungsnamen-Datei ausgewählt", "Fehler", MessageBoxButton.OK, MessageBoxImage.Warning, MessageBoxResult.OK, MessageBoxOptions.ServiceNotification);
                return ReadAbteilungsNamen();
            }
        }
    }


    public static class Extensions
    {
        /// <summary>
        /// Get the array slice between the two indexes.
        /// ... Inclusive for start index, exclusive for end index.
        /// </summary>
        public static T[] Slice<T>(this T[] source, int start, int end)
        {
            // Handles negative ends.
            if (end < 0)
            {
                end = source.Length + end;
            }
            int len = end - start;

            // Return new array.
            T[] res = new T[len];
            for (int i = 0; i < len; i++)
            {
                res[i] = source[i + start];
            }
            return res;
        }
    }

}