using System.Windows.Forms;
using System.ComponentModel;
using System.Collections;
using Com.Piwigo.Uploader.DTO;

namespace Com.Piwigo.Uploader
{
    public partial class DataTreeView : TreeView 
    {
        private object _DataSource;
        private CurrencyManager _CurrManager;

        [Category("Data")]
        [RefreshProperties(RefreshProperties.Repaint)]
        [TypeConverter("System.Windows.Forms.Design.DataSourceConverter")]
        public object DataSource
        {
            get
            {
                return _DataSource;
            }
            set
            {
                if (value == null)
                {
                    if (_CurrManager != null)
                    {
                        _CurrManager.ListChanged -= new ListChangedEventHandler(_CurrManager_ListChanged);
                        _CurrManager = null;
                    }
                }
                else
                {
                    if (value is IList)
                    {
                        _DataSource = value;
                        if (this.BindingContext == null)
                        {
                            this.BindingContext = new System.Windows.Forms.BindingContext();
                        }
                        _CurrManager = this.BindingContext[value] as CurrencyManager; 
                        _CurrManager.ListChanged += new ListChangedEventHandler(_CurrManager_ListChanged);
                    }
                    else if (value is IListSource)
                    {
                        IListSource myListSource = value as IListSource;
                        if (myListSource.ContainsListCollection)
                        {
                            throw new System.Exception("Invalid DataSource");
                        }
                        else
                        {
                            _DataSource = value;
                            if (this.BindingContext == null)
                            {
                                this.BindingContext = new System.Windows.Forms.BindingContext();
                            }
                            _CurrManager = this.BindingContext[value] as CurrencyManager;
                            _CurrManager.ListChanged += new ListChangedEventHandler(_CurrManager_ListChanged);
                        }
                    }
                    else
                    {
                        throw new System.Exception("Invalid DataSource");
                    }
                }
            }
        }


        public DataTreeView()
        {
            InitializeComponent();
        }

        void _CurrManager_ListChanged(object sender, ListChangedEventArgs e)
        {
            switch (e.ListChangedType)
            {
                case ListChangedType.ItemAdded:
                case ListChangedType.ItemChanged:
                case ListChangedType.ItemDeleted:
                case ListChangedType.ItemMoved:
                case ListChangedType.Reset:
                    BuildAlbumTree(_CurrManager.List as LocalAlbumList);
                    break;
                case ListChangedType.PropertyDescriptorAdded:
                case ListChangedType.PropertyDescriptorChanged:
                case ListChangedType.PropertyDescriptorDeleted:
                default:
                    break;
            }
        }

        private static TreeNode buildAlbumToNode(LocalAlbum aAlbum)
        {
            System.Windows.Forms.TreeNode aNode = new System.Windows.Forms.TreeNode(aAlbum.Name, 1, 1);
            aNode.ToolTipText = aAlbum.LocalDir;
            aNode.Tag = aAlbum;

            foreach (LocalImage Img in aAlbum.LocalImages)
            {
                System.Windows.Forms.TreeNode imgNode = new System.Windows.Forms.TreeNode(Img.Name, 2, 2);
                imgNode.ToolTipText = Img.LocalFile;
                imgNode.Tag = Img;
                aNode.Nodes.Add(imgNode);
            }

            foreach (LocalAlbum Alb in aAlbum.SubAlbums)
            {
                aNode.Nodes.Add(buildAlbumToNode(Alb));
            }

            return aNode;
        }

        private void BuildAlbumTree(LocalAlbumList lstAlbum)
        {
            if (this.Nodes.Count > 0)
            {
                this.Nodes.Clear();
            }

            TreeNode root = new TreeNode("Albums", 0, 0);
            this.Nodes.Add(root);
            if (lstAlbum != null)
            {
                foreach (LocalAlbum Alb in lstAlbum)
                {
                    root.Nodes.Add(buildAlbumToNode(Alb));
                }
            }
        }
    }
}