using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;

namespace PEP_Tool
{
    class TableCreator
    {
        static int errCount = 0;

        public static async Task<List<TableInfo>> CreateList(List<TableInfo> userList, string filterAbteilung = "%", string filterAbteilung2 = "%", string filterAbteilung3 = "%", string Arbeitsmuster = "", string Datum = "", string Search = "", bool searchWithFilter = false, bool isSearch = false)
        {
            errCount++;
            //System.Diagnostics.Debug.WriteLine($"{filterAbteilung}, {filterAbteilung2}, {filterAbteilung3}, {Arbeitsmuster}, {Datum}, {Search}, {isSearch}, {searchWithFilter}");
            try
            {                
                var list = ((filterAbteilung == "%" || filterAbteilung == "") && (filterAbteilung2 == "%" || filterAbteilung2 == "") && (filterAbteilung3 == "%" || filterAbteilung3 == "")) ? MainWindow.main.DefaultUserList : userList.Where(p => (p.Abteilung == filterAbteilung || p.Abteilung == filterAbteilung2 || p.Abteilung == filterAbteilung3)).ToList();


                if (Arbeitsmuster.Contains(";"))
                {
                    switch (Arbeitsmuster.Count(t => t == ';'))
                    {
                        case 1:
                            if (list != null) list = list.Where(p => (p.Arbeitsmuster.StartsWith(Arbeitsmuster.Split(';')[0]) || p.Arbeitsmuster.StartsWith(Arbeitsmuster.Split(';')[1]))).ToList();
                            break;

                        case 2:
                            if (list != null) list = list.Where(p => (p.Arbeitsmuster.StartsWith(Arbeitsmuster.Split(';')[0]) || p.Arbeitsmuster.StartsWith(Arbeitsmuster.Split(';')[1]) || p.Arbeitsmuster.StartsWith(Arbeitsmuster.Split(';')[2]))).ToList();
                            break;

                        case 3:
                            if (list != null) list = list.Where(p => (p.Arbeitsmuster.StartsWith(Arbeitsmuster.Split(';')[0]) || p.Arbeitsmuster.StartsWith(Arbeitsmuster.Split(';')[1]) || p.Arbeitsmuster.StartsWith(Arbeitsmuster.Split(';')[2]) || p.Arbeitsmuster.StartsWith(Arbeitsmuster.Split(';')[3]))).ToList();
                            break;

                        default:
                            break;
                    }
                }
                else
                {
                    if (list != null)
                        list = Arbeitsmuster != "" ? list.Where(p => p.Arbeitsmuster.StartsWith(Arbeitsmuster)).ToList() : list;
                }

                if(list != null) list = Datum != "" ? list.Where(p => p.Datum == DateTime.Parse(Datum)).ToList() : list;
                
                if (!searchWithFilter && Search == "" && isSearch) list = MainWindow.main.DefaultUserList;
                else if ((searchWithFilter && Search == "" && isSearch) || !isSearch) list = list;
                else if (!searchWithFilter && Search != "" && isSearch) list = userList.Where(p => (p.Name.ToLower().Contains(Search.ToLower()) || p.Vorname.ToLower().Contains(Search.ToLower()))).ToList();
                else if (searchWithFilter && Search != "" && isSearch) if (list != null) list = list.Where(p => (p.Name.ToLower().Contains(Search.ToLower()) || p.Vorname.ToLower().Contains(Search.ToLower()))).ToList();

                if (list != null) list = list.OrderBy(name => name.Name).ThenBy(vorname => vorname.Vorname).ThenBy(abteilung => abteilung.Abteilung).ThenBy(datum => datum.Datum).ToList();


                if (list != null)
                {
                    errCount = 0;
                    return list;
                }
                else return new List<TableInfo>();
            }
            catch (Exception ex)
            {
                if (errCount > 1)
                {
                    LogFile.WriteLine(ex.ToString());
                    LogFile.WriteLine("Message: " + ex.Message);
                    if (ex.InnerException != null) LogFile.WriteLine("InnerException: " + ex.InnerException);
                }

                if (errCount < 5) return await Task.Run(() => CreateList(userList, filterAbteilung, filterAbteilung2, filterAbteilung3, Arbeitsmuster, Datum, Search, searchWithFilter, isSearch));
                else return new List<TableInfo>();
            }
        }
    }
}