using System;
using System.Windows;
using System.Windows.Input;

namespace WpfEditor
{
    public partial class FindDialog : Window
    {
        private TextEditorControl _textEditor;
        
        public FindDialog(TextEditorControl textEditor)
        {
            InitializeComponent();
            _textEditor = textEditor;
            
            // 设置焦点到搜索文本框
            SearchTextBox.Focus();
            
            // 添加键盘事件处理
            SearchTextBox.KeyDown += SearchTextBox_KeyDown;
            
            // 如果编辑器有选中文本，将其作为默认搜索内容
            string selectedText = _textEditor.GetSelectedText();
            if (!string.IsNullOrEmpty(selectedText))
            {
                SearchTextBox.Text = selectedText;
                SearchTextBox.SelectAll();
            }
        }
        
        private void SearchTextBox_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                if (Keyboard.Modifiers == ModifierKeys.Shift)
                {
                    FindPrevious();
                }
                else
                {
                    FindNext();
                }
                e.Handled = true;
            }
            else if (e.Key == Key.Escape)
            {
                Close();
                e.Handled = true;
            }
        }
        
        private void FindNextButton_Click(object sender, RoutedEventArgs e)
        {
            FindNext();
        }
        
        private void FindPreviousButton_Click(object sender, RoutedEventArgs e)
        {
            FindPrevious();
        }
        
        private void CloseButton_Click(object sender, RoutedEventArgs e)
        {
            Close();
        }
        
        private void FindNext()
        {
            string searchText = SearchTextBox.Text;
            if (string.IsNullOrEmpty(searchText))
                return;
                
            bool matchCase = MatchCaseCheckBox.IsChecked == true;
            bool wholeWord = WholeWordCheckBox.IsChecked == true;
            
            bool found = _textEditor.FindNext(searchText, matchCase, wholeWord);
            if (!found)
            {
                MessageBox.Show("未找到指定的文本。", "查找", MessageBoxButton.OK, MessageBoxImage.Information);
            }
        }
        
        private void FindPrevious()
        {
            string searchText = SearchTextBox.Text;
            if (string.IsNullOrEmpty(searchText))
                return;
                
            bool matchCase = MatchCaseCheckBox.IsChecked == true;
            bool wholeWord = WholeWordCheckBox.IsChecked == true;
            
            bool found = _textEditor.FindPrevious(searchText, matchCase, wholeWord);
            if (!found)
            {
                MessageBox.Show("未找到指定的文本。", "查找", MessageBoxButton.OK, MessageBoxImage.Information);
            }
        }
        
        protected override void OnClosed(EventArgs e)
        {
            base.OnClosed(e);
            _textEditor.ClearFindHighlight();
        }
    }
}