using System;
using System.IO;
using System.Windows.Controls;
using System.Windows;

namespace TapeCatalog.Methods
{
    // Reusable helper methods for copy-related UI functionality
    public static class CopyMethods
    {
        public static void PopulateTree(TreeView tree, string path)
        {
            if (tree == null) return;
            tree.Items.Clear();
            if (string.IsNullOrWhiteSpace(path) || !Directory.Exists(path)) return;

            var rootDir = new DirectoryInfo(path);
            var rootItem = CreateDirectoryNode(rootDir);
            rootItem.IsExpanded = true;
            tree.Items.Add(rootItem);
        }

        public static TreeViewItem CreateDirectoryNode(DirectoryInfo dir)
        {
            var item = new TreeViewItem { Header = dir.Name, Tag = dir.FullName };
            try
            {
                foreach (var sub in dir.GetDirectories())
                {
                    item.Items.Add(CreateDirectoryNode(sub));
                }
                foreach (var f in dir.GetFiles())
                {
                    var fileItem = new TreeViewItem { Tag = f.FullName };
                    var sp = new StackPanel { Orientation = Orientation.Horizontal };
                    var cb = new CheckBox { VerticalAlignment = VerticalAlignment.Center, Margin = new Thickness(0, 0, 4, 0) };
                    var tb = new TextBlock { Text = f.Name, VerticalAlignment = VerticalAlignment.Center };
                    sp.Children.Add(cb);
                    sp.Children.Add(tb);
                    fileItem.Header = sp;
                    item.Items.Add(fileItem);
                }
            }
            catch
            {
                // ignore access exceptions
            }
            return item;
        }
    }
}