using FSI.Lib.Guis.Prj.Mgt.Model;
using FSI.Lib.MVVM;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Windows.Data;
using System.Windows.Input;

namespace FSI.Lib.Guis.Prj.Mgt.ViewModel
{
    public class ViewModelPrj : MVVM.ViewModelBase
    {
        readonly IPrjDataProvider _prjDataProvider;
        private string _search;
        private ICollectionView _collView;

        public ICommand RefreshCommand => new DelegateCommand(RefreshData);
        private ICommand _cmdQuickSearch;
        private ICommand _cmdOpen;

        public ViewModelPrj(IPrjDataProvider prjDataProvider)
        {
            Prjs = new ObservableCollection<Model.Prj>();
            _prjDataProvider = prjDataProvider;

            _cmdQuickSearch = new RelayCommand<object>(ExecuteQuickSearch, CanExecuteQuickSearch);
            _cmdOpen = new RelayCommand<object>(ExecuteOpen, CanExecuteOpen);
        }

        public ObservableCollection<Model.Prj> Prjs { get; }
        public ObservableCollection<Model.Prj> PrjsFiltered { get; set; }

        public Model.Prj SeletctedPrj { get; set; }

        public string DataPath { get; set; }

        public bool ShowPdf { get; set; }
        public string[]  EplExes { get; set; }

        public void Load()
        {
            var prjs = _prjDataProvider.Load(DataPath, ShowPdf);
            Prjs.Clear();

            if (prjs != null)
            {
                foreach (Model.Prj prj in prjs)
                {
                    Prjs.Add(prj);
                }
            }

            PrjsFiltered = new ObservableCollection<Model.Prj>(Prjs);
            _collView = CollectionViewSource.GetDefaultView(PrjsFiltered);
        }

        public string Search
        {
            get => _search;
            set
            {
                _search = value;

                _collView.Filter = e =>
                {
                    var item = (Model.Prj)e;
                    return item != null && ((item.Plant?.StartsWith(_search, StringComparison.OrdinalIgnoreCase) ?? false)
                                                || (item.SubPlant?.StartsWith(_search, StringComparison.OrdinalIgnoreCase) ?? false)
#if NET472
                                                || (item.Description?.Contains(_search) ?? false)
                                                || (item.DescriptionDetail?.Contains(_search) ?? false)
#elif NET6_0
                                                || (item.Description?.Contains(_search, StringComparison.OrdinalIgnoreCase) ?? false)
                                                || (item.DescriptionDetail?.Contains(_search, StringComparison.OrdinalIgnoreCase) ?? false)
#endif
                                                );
                };

                _collView.Refresh();
                PrjsFiltered = new ObservableCollection<Model.Prj>(_collView.OfType<Model.Prj>().ToList());
                OnPropertyChanged();
            }
        }

        public void QuickSearch(string search)
        {
            Search = search + " ";
        }

        private void RefreshData(object obj)
        {
            Search = string.Empty;
        }

        private bool CanExecuteQuickSearch(object obj)
        {
            return true;
        }

        private void ExecuteQuickSearch(object obj)
        {
            QuickSearch(obj.ToString());
        }

        public ICommand CmdQuickSearch
        {
            get { return _cmdQuickSearch; }
            set => _cmdQuickSearch = value;
        }

        private bool CanExecuteOpen(object obj)
        {
            if (SeletctedPrj != null)
                return true;
            else
                return false;
        }

        private void ExecuteOpen(object obj)
        {
            if (ShowPdf)
            {
                new Process
                {
                    StartInfo = new ProcessStartInfo(SeletctedPrj.FullName)
                    {
                        UseShellExecute = true
                    }
                }.Start();
            }
            else
            {                             
                var arguments = " /Variant:\"Electric P8\" ProjectOpen /Project:\"" + SeletctedPrj.FullName + "\"";

                string fileName = string.Empty;
                string path = string.Empty;

                for (int i = 0; i <= EplExes.Length - 1; i++)
                {
                    if (File.Exists(EplExes[i].Trim()))
                    {
                        fileName = EplExes[i].Trim();
                    }                   
                }

                new Process
                {
                    StartInfo = new ProcessStartInfo()
                    {
                        FileName = fileName,                     
                        Arguments = arguments,
                    }
                }.Start();
            }
        }

        public ICommand CmdOpen
        {
            get { return _cmdOpen; }
            set => _cmdOpen = value;
        }
    }

    public class PrjDataProvider : IPrjDataProvider
    {
        public IEnumerable<Model.Prj> Load(string path, bool showPdf)
        {
            var prjs = new ObservableCollection<Model.Prj>();
            string[] files = Directory.GetFiles(path); // alle PDF-Dateien einlesen

            foreach (var file in files)
            {
                if (((file.EndsWith(".elk") || file.EndsWith(".elp") || file.EndsWith(".els") || file.EndsWith(".elx") || file.EndsWith(".elr") || file.EndsWith(".ell") || file.EndsWith(".elf"))
                    && !showPdf) || (file.EndsWith(".pdf") && showPdf))
                {
                    Model.Prj prj = new Model.Prj();
                    FileInfo fileInfo = new FileInfo(file);
                    string[] nameNo = fileInfo.Name.Substring(0, 27 - 1).Split('-');

                    if (nameNo.Length == 3) // 3 Zahlenblöcke vorhanden?
                    {
                        if (nameNo[0].Length == 10 || Int64.TryParse(nameNo[0], out _) || nameNo[1].Length == 10 || Int64.TryParse(nameNo[1], out _) || nameNo[2].Length == 4 || !Int64.TryParse(nameNo[2], out _)) // Länge der Zahlenblöcke überprüfen
                        {
                            prj.PlantNo = Int64.Parse(nameNo[0]);
                            prj.SubPlantNo = Int64.Parse(nameNo[1]);
                            prj.No = Int64.Parse(nameNo[2]);

                            string[] fileStrings = System.IO.Path.GetFileNameWithoutExtension(fileInfo.Name).Split(' ');
                            prj.Plant = fileStrings[1];
                            prj.SubPlant = fileStrings[2];
                            prj.Description = System.IO.Path.GetFileNameWithoutExtension(fileInfo.Name).Replace(nameNo[0] + "-" + nameNo[1] + "-" + nameNo[2] + " " + fileStrings[1] + " " + fileStrings[2], "");
                            prj.Description = prj.Description.Trim();
                            prj.DescriptionDetail = prj.Plant + " " + prj.SubPlant + " " + prj.Description;
                            prj.FullName = fileInfo.FullName;
                            prjs.Add(prj);
                        }
                    }
                }
            }
            return prjs;
        }
    }
}