using CodingCannon.Pages.Basic;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using ScintillaNET;

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);

            scintilla1.Margins[0].Width = 64;
            scintilla1.Margins[0].Type = MarginType.Number;

            scintilla1.Margins[1].Width = 12;
            scintilla1.Margins[1].Type = MarginType.Symbol;

            //scintilla1.LexerLanguage = "Cpp";
            //scintilla1.Styles[Style.Default].Font = "fixedsys";
            scintilla1.Styles[Style.Default].Size = 16;

            // Configure the CPP (C#) lexer styles
            scintilla1.Styles[Style.Cpp.Default].ForeColor = Color.Silver;
            scintilla1.Styles[Style.Cpp.Comment].ForeColor = Color.FromArgb(0, 128, 0); // Green
            scintilla1.Styles[Style.Cpp.CommentLine].ForeColor = Color.FromArgb(0, 128, 0); // Green
            scintilla1.Styles[Style.Cpp.CommentLineDoc].ForeColor = Color.FromArgb(128, 128, 128); // Gray
            scintilla1.Styles[Style.Cpp.Number].ForeColor = Color.Olive;
            scintilla1.Styles[Style.Cpp.Word].ForeColor = Color.Blue;
            scintilla1.Styles[Style.Cpp.Word2].ForeColor = Color.Blue;
            scintilla1.Styles[Style.Cpp.String].ForeColor = Color.FromArgb(163, 21, 21); // Red
            scintilla1.Styles[Style.Cpp.Character].ForeColor = Color.FromArgb(163, 21, 21); // Red
            scintilla1.Styles[Style.Cpp.Verbatim].ForeColor = Color.FromArgb(163, 21, 21); // Red
            scintilla1.Styles[Style.Cpp.StringEol].BackColor = Color.Pink;
            scintilla1.Styles[Style.Cpp.Operator].ForeColor = Color.Purple;
            scintilla1.Styles[Style.Cpp.Preprocessor].ForeColor = Color.Maroon;
            scintilla1.Lexer = Lexer.Cpp;

            scintilla1.AllowDrop = true;
            scintilla1.DragOver += delegate (object? sender, DragEventArgs args)
            {
                args.Effect = args.Data.GetDataPresent(DataFormats.FileDrop)
                    ? DragDropEffects.Link
                    : DragDropEffects.None;
            };

            scintilla1.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());

                scintilla1.Text = "//Auto generated by Coding Cannon"
                    + Environment.NewLine + Environment.NewLine
                    + string.Join(Environment.NewLine, walker.PropertyNames.Select(p => $"t.{p}=f.{p};"));
            };
        }

        private 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);
            }
        }
    }
}