using System;
using System.IO;
using System.Text;
using System.Windows; // WPF 的核心命名空间
using System.Windows.Controls; // WPF TextBox 所在的命名空间
using System.Windows.Threading; // 用于 Dispatcher

namespace SunlightAggregationManager.UserClass
{
    public class ControlWriter : TextWriter
    {
        private readonly TextBox _textbox;

        public ControlWriter(TextBox textbox)
        {
            _textbox = textbox;
        }

        public override void Write(char value) => AppendText(DateTime.Now + ": " + value.ToString());
        public override void Write(string? value) => AppendText(DateTime.Now + ": " + value);
        public override void WriteLine(string? value) => AppendText(DateTime.Now + ": "+value + Environment.NewLine);

        private void AppendText(string text)
        {
            if (!_textbox.Dispatcher.CheckAccess())
            {
                _textbox.Dispatcher.Invoke(DispatcherPriority.Background, new Action(() => AppendText(text)));
                return;
            }
            _textbox.AppendText(text);
            _textbox.ScrollToEnd();
        }

        public override Encoding Encoding => Encoding.UTF8;
    }

    //全局日志管理器
    public static class GlobalLogManager
    {
        private static ControlWriter? _currentWriter;

        // 【核心功能】注册目标 TextBox
        // 子页面加载时调用这个方法
        public static void RegisterTarget(TextBox logBox)
        {
            // 创建新的 Writer
            _currentWriter = new ControlWriter(logBox);

            // 【关键】将 Console 的输出重定向到这个 Writer
            // 这样 Console.WriteLine("...") 就会自动写入到 logBox 中
            Console.SetOut(_currentWriter);

            Console.WriteLine("Start");
        }

        //提供一个直接写入的方法（如果不使用 Console.WriteLine）
        public static void Write(string message)
        {
            _currentWriter?.WriteLine(message);
        }
    }
}