using System;
using System.Windows.Forms;

namespace RyzStudio.Windows.Forms
{
    public class MovableTreeViewSelectedNode
    {
        protected MovableTreeView Treeview = null;

        public MovableTreeViewSelectedNode(MovableTreeView treeview)
        {
            Treeview = treeview;
        }

        protected TreeNode SelectedNode { get => this.Treeview.SelectedNode; set => this.Treeview.SelectedNode = value; }

        protected string encodeName(string name) => Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(name));

        public TreeNode AddFolder()
        {
            //return this.AddFolder("New Folder " + (new Random()).Next(10001, 99999).ToString());
            return this.AddFolder("New Folder (" + DateTime.Now.ToString("yyyy-MM-dd-HHmmss") + ")");
        }

        public TreeNode AddFolder(string name)
        {
            if (this.SelectedNode == null)
            {
                return null;
            }

            if (this.SelectedNode.Tag != null)
            {
                return null;
            }

            return this.SelectedNode.Nodes.Add(encodeName(name), name, (int)MovableTreeView.IconSet.Folder1, (int)MovableTreeView.IconSet.Folder2);
        }

        public TreeNode AddItem(string name, object tag)
        {
            if (this.SelectedNode == null)
            {
                return null;
            }

            if (this.SelectedNode.Tag != null)
            {
                return null;
            }

            TreeNode tn = new TreeNode(name, (int)MovableTreeView.IconSet.Default, (int)MovableTreeView.IconSet.Default);
            tn.Tag = tag;

            this.SelectedNode.Nodes.Add(tn);

            return tn;
        }


        //public TreeNode AddPage() => this.AddPage("New Page (" + DateTime.Now.ToString("yyyy-MM-dd-HHmmss") + ")");

        //public TreeNode AddPage(string name)
        //{
        //    if (this.SelectedNode == null)
        //    {
        //        return null;
        //    }

        //    if (this.SelectedNode.Tag != null)
        //    {
        //        return null;
        //    }

        //    TreeNode tn = this.SelectedNode.Nodes.Add(encodeName(name), name, (int)MovableTreeView.IconSet.Default, (int)MovableTreeView.IconSet.Default);
        //    tn.Tag = new object();
        //    tn.ToolTipText = name;

        //    nodeCount++;
        //    NodeCountUpdate(nodeCount);

        //    this.SelectedNode = tn;

        //    OnAddItemNode(tn);
        //    return tn;
        //}


        public void Delete()
        {
            if (this.SelectedNode == null)
            {
                return;
            }

            if (this.Treeview.Nodes.Count <= 0)
            {
                return;
            }

            if (this.SelectedNode.Equals(this.Treeview.Nodes[0]))
            {
                return;
            }

            this.SelectedNode.Remove();
        }

        public void MoveDown()
        {
            if (this.SelectedNode == null)
            {
                return;
            }

            TreeNode tn = this.SelectedNode;
            if (tn.Parent == null)
            {
                return;
            }

            TreeNode tn1 = tn.Parent;

            if (tn.Index >= (tn1.Nodes.Count - 1))
            {
                return;
            }

            int n = tn.Index + 1;

            tn1.Nodes.Remove(tn);
            tn1.Nodes.Insert(n, tn);

            this.SelectedNode = tn;
        }

        public void MoveUp()
        {
            if (this.SelectedNode == null)
            {
                return;
            }

            TreeNode tn = this.SelectedNode;
            if (tn.Parent == null)
            {
                return;
            }

            if (tn.Index <= 0)
            {
                return;
            }

            int n = tn.Index - 1;

            TreeNode tn1 = tn.Parent;
            tn1.Nodes.Remove(tn);
            tn1.Nodes.Insert(n, tn);

            this.SelectedNode = tn;
        }

        public void Sort()
        {
            if (this.SelectedNode == null)
            {
                return;
            }

            string[] tnv = new string[0];
            TreeNode[] tna = new TreeNode[0];

            foreach (TreeNode tn2 in this.SelectedNode.Nodes)
            {
                Array.Resize(ref tna, (tna.Length + 1));
                tna[(tna.Length - 1)] = tn2;

                Array.Resize(ref tnv, (tnv.Length + 1));
                tnv[(tnv.Length - 1)] = tn2.Text;
            }

            Array.Sort(tnv, tna);

            this.SelectedNode.Nodes.Clear();

            foreach (TreeNode tn2 in tna)
            {
                this.SelectedNode.Nodes.Add(tn2);
            }
        }

    }
}