using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using CodingCannon.Pages.Basic;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;

namespace CodingCannon.Pages
{
    internal partial class PropertyWalkerPage : CcUserControlBase
    {
        public PropertyWalkerPage()
        {
            InitializeComponent();
            Text = "Property Walker for MAPPING";
        }

        protected override void OnHandleCreated(EventArgs e)
        {
            base.OnHandleCreated(e);


            richTextBox1.AllowDrop = true;
            richTextBox1.DragOver += delegate (object? sender, DragEventArgs args)
            {
                args.Effect = args.Data.GetDataPresent(DataFormats.FileDrop)
                    ? DragDropEffects.Link
                    : DragDropEffects.None;
            };

            richTextBox1.DragDrop += delegate (object? sender, DragEventArgs args)
            {
                string[] files;
                if (args.Data?.GetDataPresent(DataFormats.FileDrop) != true
                    || null == (files = (string[])args.Data.GetData(DataFormats.FileDrop)!)
                    || files.Length != 1) return;
                var text = File.ReadAllText(files![0]);


                var tree = CSharpSyntaxTree.ParseText(text);

                var walker = new PropertyWalker();

                walker.Visit(tree.GetRoot());

                richTextBox1.Text = string.Join(Environment.NewLine, walker.PropertyNames.Select(p => $"t.{p}=f.{p};"));
            };
        }

        class PropertyWalker : CSharpSyntaxWalker
        {
            private readonly List<string> _properties = new();
            public IReadOnlyCollection<string> PropertyNames => _properties;
            public override void VisitPropertyDeclaration(PropertyDeclarationSyntax node)
            {
                _properties.Add(node.Identifier.Text);
                base.VisitPropertyDeclaration(node);
            }
        }
    }
}