using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using DuckDB.NET.Data;
using ICSharpCode.AvalonEdit.Highlighting.Xshd;
using ICSharpCode.AvalonEdit.Highlighting;
using ICSharpCode.AvalonEdit;

namespace ExcelHelper.Views.Pages
{
    /// <summary>
    /// SqlQueryPage.xaml 的交互逻辑
    /// </summary>
    public partial class SqlQueryPage : Page,IView
    {
        public SqlQueryPage()
        {
            InitializeComponent();

            // 加载 HL/SQL.xshd
            using (var reader = new System.Xml.XmlTextReader("HL/SQL.xshd"))
            {
                var xshd = HighlightingLoader.LoadXshd(reader);
                var highlighting = HighlightingLoader.Load(xshd, HighlightingManager.Instance);
                TextEditor.SyntaxHighlighting = highlighting;
                
            }
        }
         


        // 替换 DuckDBDataAdapter 使用 DataTable.Load 方法
        private void ExecuteButton_Click(object sender, RoutedEventArgs e)
        {
            StatusTextBlock.Text = "执行中...";
            // 获取 SQL 查询文本
            string sqlQuery = TextEditor.Text;

            // 创建 DuckDB 连接
            using (var connection = new DuckDBConnection("DataSource=:memory:"))
            {
                connection.Open();
                 
                try
                {
                    // 执行用户的查询
                    using (var command = connection.CreateCommand())
                    {
                        command.CommandText = sqlQuery;
                        using (var reader = command.ExecuteReader())
                        {
                            DataTable dataTable = new DataTable();
                            dataTable.Load(reader);

                            // 将结果绑定到 DataGrid
                            ResultDataGrid.ItemsSource = dataTable.DefaultView;
                            StatusTextBlock.Text = $"执行完成，共 {dataTable.Rows.Count} 行";
                        }
                    }
                }
                catch (Exception ex)
                {
                    StatusTextBlock.Text = $"查询失败：{ex.Message}";
                    MessageBox.Show($"查询执行失败：{ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                }

                connection.Close();
            }
        }

        private void FunctionListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (FunctionListBox.SelectedItem is ListBoxItem item)
            {
                var functionText = item.Content.ToString();
                var caretOffset = TextEditor.CaretOffset;
                TextEditor.Document.Insert(caretOffset, functionText);
            }
        } 
    }
}