using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using SQLVision.Core.Enums;
using SQLVision.Core.Models;
using SQLVision.Visualizers.Interfaces;
using System.Data;
using System.Text;

namespace SQLVision.Visualizers.Visualizers;

public class TextVisualizer : IVisualizer
{
    public FrameworkElement Visualize(DataTable data, OutputDefinition definition)
    {
        var textBlock = new TextBlock
        {
            Text = ConvertDataTableToText(data),
            TextWrapping = TextWrapping.Wrap,
            FontFamily = new Microsoft.UI.Xaml.Media.FontFamily("Consolas"),
            FontSize = 12,
            IsTextSelectionEnabled = true
        };

        return new ScrollViewer
        {
            Content = textBlock,
            VerticalScrollBarVisibility = ScrollBarVisibility.Auto,
            HorizontalScrollBarVisibility = ScrollBarVisibility.Auto
        };
    }

    private string ConvertDataTableToText(DataTable data)
    {
        var sb = new StringBuilder();

        // Заголовки
        for (int i = 0; i < data.Columns.Count; i++)
        {
            sb.Append(data.Columns[i].ColumnName);
            if (i < data.Columns.Count - 1)
                sb.Append(" | ");
        }
        sb.AppendLine();
        sb.AppendLine(new string('-', data.Columns.Count * 20));

        // Данные
        foreach (DataRow row in data.Rows)
        {
            for (int i = 0; i < data.Columns.Count; i++)
            {
                var value = row[i];
                var text = value?.ToString() ?? "NULL";

                // Обрезаем слишком длинные значения
                if (text.Length > 50)
                    text = text.Substring(0, 47) + "...";

                sb.Append(text);

                if (i < data.Columns.Count - 1)
                    sb.Append(" | ");
            }
            sb.AppendLine();
        }

        return sb.ToString();
    }

    public bool CanVisualize(OutputType type) => type == OutputType.Text;
}