---

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using Microsoft.Win32;
using Xbim.Ifc;
using Xbim.Ifc4.Interfaces;

namespace IfcBimEditor
{
    public partial class MainWindow : Window
    {
        private IfcStore _model;
        private string _openedPath;

        public MainWindow() { InitializeComponent(); }

        private List<IIfcObject> Selected => ElementsList.SelectedItems
            .Cast<ElementItem>().Select(x => x.Element).ToList();

        private void Open_Click(object sender, RoutedEventArgs e)
        {
            var dialog = new OpenFileDialog { Filter = "IFC (*.ifc)|*.ifc" };
            if (dialog.ShowDialog() != true) return;
            try
            {
                Viewer.Model = null;
                _model?.Dispose();
                _model = IfcStore.Open(dialog.FileName);
                _openedPath = dialog.FileName;
                // Создание геометрии для отображения.
                var context = new Xbim.ModelGeometry.Scene.Xbim3DModelContext(_model);
                context.CreateContext();
                Viewer.Model = _model;
                Viewer.ReloadModel();
                ElementsList.ItemsSource = _model.Instances.OfType<IIfcObject>()
                    .Select(x => new ElementItem { Element = x }).OrderBy(x => x.Display).ToList();
                StatusText.Text = $"Открыт: {_openedPath}";
            }
            catch (Exception ex) { MessageBox.Show(ex.Message, "Ошибка открытия"); }
        }

        private void ElementsList_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var selected = Selected;
            SelectedCount.Text = $"Выбрано: {selected.Count}";
            var item = selected.FirstOrDefault();
            if (item == null) { PropertiesGrid.ItemsSource = null; return; }
            var rows = new List<PropertyRow>
            {
                new PropertyRow { Group = "IFC", Name = "Class", Value = item.ExpressType.Name },
                new PropertyRow { Group = "IFC", Name = "GlobalId", Value = item.GlobalId.ToString() },
                new PropertyRow { Group = "IFC", Name = "Name", Value = item.Name?.ToString() ?? "" }
            };
            foreach (var rel in item.IsDefinedBy.OfType<IIfcRelDefinesByProperties>())
                if (rel.RelatingPropertyDefinition is IIfcPropertySet ps)
                    foreach (var prop in ps.HasProperties.OfType<IIfcPropertySingleValue>())
                        rows.Add(new PropertyRow { Group = ps.Name?.ToString(),
                            Name = prop.Name.ToString(), Value = prop.NominalValue?.ToString() });
            PropertiesGrid.ItemsSource = rows;
        }

        private void Similar_Click(object sender, RoutedEventArgs e)
        {
            if (_model == null || Selected.Count == 0) return;
            var similar = IfcEditor.FindSimilar(_model, Selected[0], MatchMode.SelectedIndex)
                .Select(x => x.GlobalId.ToString()).ToHashSet();
            ElementsList.SelectedItems.Clear();
            foreach (ElementItem item in ElementsList.Items)
                if (similar.Contains(item.Element.GlobalId.ToString()))
                    ElementsList.SelectedItems.Add(item);
            StatusText.Text = $"Найдено подобных элементов: {similar.Count}";
        }

        private void Apply_Click(object sender, RoutedEventArgs e)
        {
            if (_model == null || Selected.Count == 0) { MessageBox.Show("Выберите элементы."); return; }
            var pset = PsetInput.Text.Trim();
            var prop = PropertyInput.Text.Trim();
            if (pset.Length == 0 || prop.Length == 0) { MessageBox.Show("Укажите Pset и имя свойства."); return; }
            if (MessageBox.Show($"Изменить {prop} у {Selected.Count} элементов?",
                "Подтверждение", MessageBoxButton.YesNo) != MessageBoxResult.Yes) return;
            try
            {
                var count = IfcEditor.SetStringProperty(_model, Selected, pset, prop,
                    ValueInput.Text, CreateMissing.IsChecked == true);
                StatusText.Text = $"Изменено элементов: {count}. Сохраните IFC.";
                ElementsList_SelectionChanged(null, null);
            }
            catch (Exception ex) { MessageBox.Show(ex.Message, "Ошибка изменения"); }
        }

        private void Save_Click(object sender, RoutedEventArgs e)
        {
            if (_model == null) return;
            var dialog = new SaveFileDialog { Filter = "IFC (*.ifc)|*.ifc",
                FileName = System.IO.Path.GetFileNameWithoutExtension(_openedPath) + "_edited.ifc" };
            if (dialog.ShowDialog() != true) return;
            if (string.Equals(dialog.FileName, _openedPath, StringComparison.OrdinalIgnoreCase))
            { MessageBox.Show("Выберите новое имя файла для сохранения."); return; }
            try { _model.SaveAs(dialog.FileName); StatusText.Text = "Сохранено: " + dialog.FileName; }
            catch (Exception ex) { MessageBox.Show(ex.Message, "Ошибка сохранения"); }
        }

        protected override void OnClosed(EventArgs e) { _model?.Dispose(); base.OnClosed(e); }
        public sealed class PropertyRow { public string Group { get; set; } public string Name { get; set; } public string Value { get; set; } }
    }
}