using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml.Linq;

namespace VisableComponents
{
   
    public partial class MyTreeView : UserControl
    {
        List<string> hierarchy = new List<string>();
        public MyTreeView()
        {
            InitializeComponent();
        }
        public void addToHierarchy(List<string> list) { hierarchy = list; }
        public int GetId
        {
            get {
                if(treeView.SelectedNode.FirstNode == null) 
                return treeView.SelectedNode.Index;
                return -1;
            }
           
        }
        public object GetNode<T>(T nodeClass) where T: Type
        {
            if (hierarchy == null || hierarchy.Count == 0)
            {
                throw new Exception("Не задана иерархия");
            }
            if (treeView.SelectedNode?.FirstNode != null)
            {

                throw new Exception("Выбран не крайний элемент");
            }
            var res = Activator.CreateInstance(nodeClass);
            T child;
            TreeNode? parent = treeView.SelectedNode;
            do
            {
                if (nodeClass.GetField(parent.Name) == null)
                    nodeClass.GetProperty(parent.Name).SetValue(res, parent.Text);
                else nodeClass.GetField(parent.Name).SetValue(res, parent.Text);
                parent = parent.Parent;
            } while (parent != null);
            return res;
        }
        public void LoadTree<T>(List<T> nodes)
        {
            if(hierarchy == null ||  hierarchy.Count == 0)
            {
                throw new Exception("Не задана иерархия");
            }
            treeView.Nodes.Clear();
            foreach (T node in nodes)
            {
                TreeNode parent = null;
                Type type = node.GetType();
                foreach(string step in hierarchy) 
                {
                    var aa = type.GetFields();
                    if (type.GetField(step) != null || type.GetProperty(step) != null)
                    {
                        var value = type.GetField(step) == null ? type.GetProperty(step).GetValue(node) : type.GetField(step).GetValue(node);
                        TreeNode[] nodesLevel;

                        if (parent == null)
                        {
                            
                            nodesLevel = treeView.Nodes.Find(step, false);
                            TreeNode currentNode = nodesLevel.FirstOrDefault(x => x.Text.Equals(value));
                            if (currentNode is null)
                            {
                                TreeNode newNode = new TreeNode(value.ToString());
                                newNode.Name = step;
                                treeView.Nodes.Add(newNode);
                                parent = newNode;
                            }else
                            {
                                parent = currentNode;
                                continue;
                            }
                        }
                        else 
                        {
                            
                            nodesLevel = parent.Nodes.Find(step, false);
                            TreeNode currentNode = nodesLevel.FirstOrDefault(x => x.Text.Equals(value));
                            if (currentNode is null)
                            {
                                TreeNode newNode = new TreeNode(value.ToString());
                                newNode.Name = step;
                                parent.Nodes.Add(newNode);
                                parent = newNode;
                            }else
                            {
                                parent = currentNode;
                                continue;
                            }
                        }
                        
                    }
                    else break;
                    

                }
            }
        }
    }
}