using System;
using System.Threading;
using System.Windows.Forms;
using System.Drawing;

namespace _Log
{
  public class Log
  {
    TextBox tbLog;

    public Log(TextBox aTbLog)
    {
      tbLog = aTbLog;
      tbLog.WordWrap = false;
      tbLog.Multiline = true;
      tbLog.ScrollBars = ScrollBars.Both;
      tbLog.Font = new Font("Consolas", 14);
    }

    public void l(string s, string from = null)
    {
      string s2 = Thread.CurrentThread.IsBackground ? "background" : "UI thread";
      s = $"{DateTime.Now.ToString("HH:mm:ss")}{" " + from} ({s2}) {s}\r\n";
      if (!tbLog.InvokeRequired)
        tbLog.AppendText(s);
      else
        tbLog.Invoke(new Action(() => tbLog.AppendText(s)));
    }
       

    public static Log cli, srv;


    public Log(TextBox aTbLogSrv, TextBox aTbLogCli)
    {
      srv = new Log(aTbLogSrv);
      cli = new Log(aTbLogCli);
    }


    public static void S(string s)
    {
      srv?.l(s); // to jest równoważne:  if (srv != null) srv.l(s);
    }

    public static void Clear()
    {
      srv?.tbLog.Clear();
      cli?.tbLog.Clear();
    }

    public static void C(string s)
    {
      cli?.l(s);
    }

    public static readonly string HR = $"\r\n{new string('—', 100)} ";


    public static void B(string s)
    {
      cli?.l(s);
    }

    public static void L(string s)
    {
      srv?.l(s);
    }


    

  }
}