using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Windows;
using System.Windows.Data;
using System.Windows.Input;

namespace WpfApp035
{
	public class ViewModel : ICommand, INotifyPropertyChanged
	{
		private CollectionViewSource cvs = new();
		public ICollectionView PeopleCollection
		{
			get
			{
				if (cvs.Source == null) cvs.Source = LoadData();
				return cvs.View;
			}
		}

		public People? LastItem { get; set; }

		public event EventHandler? CanExecuteChanged;
		public event PropertyChangedEventHandler? PropertyChanged;

		public bool CanExecute(object? parameter) => true;
		public void Execute(object? parameter)
		{
			LastItem = (parameter == null) ? null : (People)parameter;
			PropertyChanged?.Invoke(this,new PropertyChangedEventArgs(nameof(LastItem)));
		}

		private ObservableCollection<People> LoadData()
		{
			ObservableCollection<People> col = new();
			for (int i = 1; i < 10; i++) col.Add(new People() { FirstName = $"FirstName {i}" });
			return col;
		}

		public class People
		{
			public string FirstName { get; set; }
			public bool IsSelected { get; set; }
		}
	}
}