using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using CodeMerger.ViewModels;
using ICSharpCode.AvalonEdit;
using ICSharpCode.AvalonEdit.Highlighting;

namespace CodeMerger
{
    public partial class MainWindow : Window
    {
        private MainWindowViewModel _viewModel;

        public MainWindow()
        {
            InitializeComponent();

            _viewModel = new MainWindowViewModel();
            DataContext = _viewModel;
        }

        private void txtOriginalCode_Loaded(object sender, RoutedEventArgs e)
        {
            ConfigureTextEditor(txtOriginalCode);
        }

        private void txtLLMCode_Loaded(object sender, RoutedEventArgs e)
        {
            ConfigureTextEditor(txtLLMCode);
        }

        private void txtMergedCode_Loaded(object sender, RoutedEventArgs e)
        {
            ConfigureTextEditor(txtMergedCode);
        }

        private void ConfigureTextEditor(TextEditor editor)
        {
            editor.Options.EnableHyperlinks = false;
            editor.Options.EnableEmailHyperlinks = false;
            editor.Options.EnableVirtualSpace = false;
            editor.Options.ShowSpaces = false;
            editor.Options.ShowTabs = false;
            editor.Options.ShowEndOfLine = false;
            editor.Options.ShowColumnRuler = false;
            editor.Options.EnableRectangularSelection = true;
            editor.Options.EnableTextDragDrop = true;
            editor.WordWrap = true;

            // Configurar syntax highlighting para C#
            editor.SyntaxHighlighting = HighlightingManager.Instance.GetDefinition("C#");

            // Configurar indentación con tabulaciones
            editor.Options.ConvertTabsToSpaces = false;
            editor.Options.IndentationSize = 4;
        }

        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            // Guardar configuración antes de cerrar
            _viewModel.Settings.Save();
        }

        private void GridSplitter_DragCompleted(object sender, System.Windows.Controls.Primitives.DragCompletedEventArgs e)
        {
            // Actualizar anchos de columnas en el ViewModel
            var columnDefinitions = EditorsGrid.ColumnDefinitions;
            _viewModel.FirstColumnWidth = columnDefinitions[1].ActualWidth;
            _viewModel.SecondColumnWidth = columnDefinitions[3].ActualWidth;
            _viewModel.ThirdColumnWidth = columnDefinitions[5].ActualWidth;
        }

        private void TextEditor_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            // Seleccionar palabra completa al hacer doble clic
            var editor = sender as TextEditor;
            if (editor != null)
            {
                var position = editor.TextArea.Caret.Position;
                var document = editor.Document;
                var line = document.GetLineByOffset(position.Offset);
                var lineText = document.GetText(line);

                // Obtener palabra bajo el cursor
                var offsetInLine = position.Offset - line.Offset;
                int wordStart = offsetInLine;
                int wordEnd = offsetInLine;

                // Encontrar inicio de palabra
                while (wordStart > 0 && IsWordPart(lineText[wordStart - 1]))
                    wordStart--;

                // Encontrar fin de palabra
                while (wordEnd < lineText.Length && IsWordPart(lineText[wordEnd]))
                    wordEnd++;

                // Seleccionar palabra
                if (wordEnd > wordStart)
                {
                    editor.Select(line.Offset + wordStart, wordEnd - wordStart);
                }
            }
        }

        private bool IsWordPart(char c)
        {
            return char.IsLetterOrDigit(c) || c == '_';
        }
    }
}