using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Forms;
using System.Windows.Input;

using BeWo.Annotations;
using BeWo.Core;
using BeWo.ServiceProxy;
using BeWo.Validation;
using BeWo.View.Controls;
using BeWo.ViewModel;
using BeWo.ViewModel.ListViewModel;

using BS.Shared;
using BS.Shared.Core;
using BS.Shared.DataContracts;
using BS.Shared.Extensions;
using BS.Shared.Translation;
using DevExpress.Utils;
using DevExpress.Xpf.Editors;
using DevExpress.Xpf.Grid;
using MessageBox = System.Windows.MessageBox;

namespace BeWo.View
{
    public partial class HilfeplanImportView : INotifyPropertyChanged
    {
        private HilfeplanImportDC _ViewModel;
        private String _UploadFileName;
        private long? _SupportConceptOid;

        public event PropertyChangedEventHandler PropertyChanged;
        public event Action CloseButtonClicked;

        private HilfeplanImportDC ViewModel
        {
            get { return _ViewModel; }
            set
            {
                DataContext = value;
                _ViewModel  = value;
            }
        }
        

        public HilfeplanImportView(long? supportConceptOid)
        {
            InitializeComponent();
            _SupportConceptOid = supportConceptOid;
            ClearControls();
        }
        
        

        private void ReloadViewModel(HilfeplanImportDC dc)
        {
            this.ViewModel = dc;

            ClearControls();
            UpdateControls(dc);
        }

        private void ClearControls()
        {
            PanelGruppen.Children.Clear();
            treeview_Goals.ItemsSource = null;

        }

        private void UpdateControls(HilfeplanImportDC dc)
        {
            if (dc.Gruppen != null)
            {
                foreach (var gruppe in dc.Gruppen)
                {
                    ErstelleGruppe(gruppe);
                }
            }

            if (dc.Ziele != null)
            {
                ErstelleTreeView(dc.Ziele);
            }
            GroupBoxMain.Visibility = Visibility.Visible;

            
        }


        private void ErstelleGruppe(HilfeplanImportItemDC gruppe)
        {
            var expander = new Expander();
            expander.Margin = new Thickness(5);
            expander.FontSize = 14;
            expander.Header = gruppe.Label;
            expander.IsExpanded = true;


            var itemGrid = new Grid();
            
            //itemGrid.FontWeight = FontWeights.Normal;
            itemGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });
            itemGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });

            expander.Content = itemGrid;

            if (gruppe.Items != null)
            {
                foreach (var item in gruppe.Items)
                {
                    itemGrid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });

                    var label = new System.Windows.Controls.Label();
                    label.FontSize = 12;
                    label.Margin = new Thickness(3);
                    label.Content = item.Label;
                    label.SetValue(Grid.ColumnProperty, 0);
                    label.SetValue(Grid.RowProperty, itemGrid.RowDefinitions.Count - 1);

                    var txt = new System.Windows.Controls.TextBox();
                    txt.FontSize = 12;
                    txt.Margin = new Thickness(3);
                    txt.Text = item.Content;
                    txt.MinWidth = 300;
                    txt.SetValue(Grid.ColumnProperty, 1);
                    txt.SetValue(Grid.RowProperty, itemGrid.RowDefinitions.Count - 1);
                    txt.Tag = item;

                    itemGrid.Children.Add(label);
                    itemGrid.Children.Add(txt);
                }
            }
            PanelGruppen.Children.Add(expander);
        }

        private void ErstelleTreeView(IList<HilfeplanImportZielDC> ziele)
        {
            var treeItems = new BindingList<GoalTreeItem>();

            foreach (var item in ziele)
            {
                GoalTreeItem ziel = new GoalTreeItem { Name = item.ZielName, Notice = item.ZielBeschreibung, HilfeplanImportZiel = item };

                GoalTreeItem parent = treeItems.Where(i => i.Name == item.Bereich).FirstOrDefault();
                if (parent == null)
                {
                    parent = new GoalTreeItem();
                    parent.Name = item.Bereich;

                    treeItems.Add(parent);
                }
                parent.Children.Add(ziel);
            }
            treeview_Goals.ItemsSource = treeItems;
        }

        private void popupedit_file_PopUpClick(object sender, RoutedEventArgs ev)
        {
            var dlg = new OpenFileDialog();

            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                try
                {

                    _UploadFileName = dlg.FileName;

                    popupedit_file.Text = dlg.SafeFileName;
                    ButtonImport.IsEnabled = true;


                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Exclamation);
                }
            }
        }
        private void ButtonImport_Click(object sender, RoutedEventArgs pe)
        {
            if (!String.IsNullOrEmpty(popupedit_file.Text))
            {

                try
                {
                    var upload = new ProgressStream(File.OpenRead(_UploadFileName));
                    //upload.ProgressChanged += (s, e) => Dispatcher.BeginInvoke(
                    //    DispatcherPriority.Normal,
                    //    (Action)(() =>
                    //    {
                    //        progressbar_upload.Value = e.Data;
                    //        text_progress.Content = string.Format("Bitte warten... {0:00}%", e.Data * 100);
                    //    }));
                    long oid = 0;

                    var lUlPackage = new UploadPackage(null, 0, _UploadFileName, null, 0, 0, upload);

                    ServiceFacade.DoStreamingServiceAsync(
                        s => s.UploadPersehFile(lUlPackage),
                        r => this.Dispatch(
                            delegate
                            {
                                upload.Dispose();
                                if (r.HilfeplanImportData != null)
                                {
                                    ReloadViewModel(r.HilfeplanImportData);
                                }

                            }),
                                () => this.Dispatch(
                                    delegate
                                    {

                                        upload.Dispose();
                                    }));
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Exclamation);
                }


            }
        }


        private void btnSave_Click(object sender, RoutedEventArgs e)
        {
            if (ViewModel != null)
            {
                UpdateViewModel();
                var result = ServiceFacade.DoCustomerServiceSync(s => s.ImportSupportConcept(ViewModel));
                if (!String.IsNullOrEmpty(result))
                {
                    MessageBox.Show(result, "Import", MessageBoxButton.OK, MessageBoxImage.Information);
                }
                CloseButtonClicked?.Invoke();
            }
        }

        private void UpdateViewModel()
        {
            ViewModel.SupportConceptOid = _SupportConceptOid;
            //Update Stammdaten
            foreach (var item in PanelGruppen.Children)
            {
                var exp = item as Expander;
                if (exp != null)
                {
                    var g = exp.Content as Grid;
                    foreach (var gridItem in g.Children)
                    {
                        var txt = gridItem as System.Windows.Controls.TextBox;
                        if (txt != null && txt.Tag != null)
                        {
                            var ii = txt.Tag as HilfeplanImportItemDC;
                            if (ii != null)
                            {
                                ii.Content = txt.Text;
                            }
                        }
                    }
                }
            }

            //Update Ziele
            foreach (var item in treeview_Goals.ItemsSource)
            {
                var gti = item as GoalTreeItem;
                if (gti != null)
                {
                    UpdateGoalWithChildren(null, gti);
                    
                }
                
            }

        }

        private void UpdateGoalWithChildren(GoalTreeItem parent, GoalTreeItem gti)
        {
            if (gti.HilfeplanImportZiel != null)
            {
                if (parent != null)
                {
                    gti.HilfeplanImportZiel.Bereich = parent.Name;
                }
                
                gti.HilfeplanImportZiel.ZielName = gti.Name;
            }
            if (gti.Children != null)
            {
                foreach (var c in gti.Children)
                {
                    UpdateGoalWithChildren(gti, c);
                }
            }
            
        }

        private void btnClose_Click(object sender, RoutedEventArgs e)
        {
            CloseButtonClicked?.Invoke();
        }
    }

    public class GoalTreeItem
    {
        private BindingList<GoalTreeItem> _Children;

        public GoalTreeItem() { }

        public bool IsHidden { get; set; }

        public String Name { get; set; }

        public String Notice { get; set; }

        public HilfeplanImportZielDC HilfeplanImportZiel { get; set; }

        public BindingList<GoalTreeItem> Children
        {
            get => _Children ?? (_Children = new BindingList<GoalTreeItem>());
            set => _Children = value;
        }

    }
}