#define ALLOW_LOG_CLEARING // when defined will allow the log to be cleared
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Reflection;
using System.Security;
using System.Threading;

namespace RomCheater.Logging
{
    public partial class LogWriter : UserControl
    {
        private static string LOG_PATH { get { return string.Format(@"{0}\{1}", typeof(LogWriter).Assembly.Location.Replace("RomCheater.Logging.dll", ""), LoggingConstants.AppLogFile); } }
        private delegate void OnSetLogText(string value, bool invoked);
        private OnSetLogText HandleSetLogText = null;
        public LogWriter() : this(false) { }
        public LogWriter(bool redirectConsole)
        {
            InitializeComponent();
            HandleSetLogText += new OnSetLogText(SetLogText);
            this.Log = new LogStream(this);
            this.RedirectConsoleOutput = redirectConsole;
            toolTip1.SetToolTip(btnClearLog, "Clears the Log");
            toolTip1.SetToolTip(btnCopyLogToClipboard, "Copies the Log to the Clipboard");
                chkAutoScroll.Checked = this.AutoScroll;
        }
        private LogStream _Log;
        public LogStream Log { get { return _Log; } private set { _Log = value; } }
        private bool _AutoScroll;
        new public bool AutoScroll
        {
            get
            {
                return _AutoScroll;
            }
            set
            {
                if (!_AutoScroll)
                    chkAutoScroll.Checked = true;
                if (AutoScroll && !value)
                    chkAutoScroll.Checked = false;
                _AutoScroll = value; 
            }
        }

        private bool _RedirectConsoleOutput;
        public bool RedirectConsoleOutput
        {
            get { return _RedirectConsoleOutput; }
            set
            {
                _RedirectConsoleOutput = value;
                if (value) { Console.SetOut(this.Log); }
                else
                {
                    Stream stream = Console.OpenStandardOutput(0x100);
                    TextWriter writer = null;
                    if (stream == Stream.Null) { writer = TextWriter.Synchronized(StreamWriter.Null); }
                    Encoding encoding = this.Log.Encoding;
                    StreamWriter writer2 = new StreamWriter(stream, encoding, 0x100);
                    //writer2.HaveWrittenPreamble = true;
                    writer2.AutoFlush = true;
                    writer = TextWriter.Synchronized(writer2);
                    Console.SetOut(writer);
                }
            }
        }

        private void btnClearLog_Click(object sender, EventArgs e) { this.Clear(true); }
        private void btnCopyLogToClipboard_Click(object sender, EventArgs e) { Clipboard.SetText(txtLog.Text); }


        public void WriteLogToFile(string value)
        {
            FileStream fs = new FileStream(LOG_PATH, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
            StreamWriter writer = new StreamWriter(fs);
            writer.AutoFlush = true;
            if (value == Log.NewLine) { writer.Write(System.Environment.NewLine); }
            else { writer.Write(value); }
            writer.Close();
        }
        public void SetLogText(string value) { SetLogText(value, false); }
        public void SetLogText(string value, bool invoked)
        {
            if (!invoked) { WriteLogToFile(value); }

            if (txtLog.InvokeRequired)
            {
                this.Invoke(HandleSetLogText, new object[] { value, true });
            }
            else
            {
                txtLog.Text += value;
                if (AutoScroll)
                {
                    txtLog.SelectionStart = txtLog.TextLength;
                    txtLog.ScrollToCaret();
                    txtLog.Refresh();
                }
            }           
            Thread.Sleep(100);
        }

        new public string Text
        {
            get
            {
                throw new InvalidOperationException("Please use GetLogText()");
            }
            private set
            {
                throw new InvalidOperationException("Please use SetLogText(string value)");
            }
        }
        public void CreateNewLog(bool delete)
        {
            if (delete)
            {
                FileInfo fi = new FileInfo(LOG_PATH);
                if (fi.Exists)
                    fi.Delete();
            }
            Log.WriteLine("{0} ({2} v{3} {4}) created on {1}", LoggingConstants.AppLogFile, DateTime.Now.ToString(), LoggingConstants.AppName, LoggingConstants.AppVersion, LoggingConstants.AppBuild);     
        }
        public void Clear()
        {
            Clear(false);
        }
        private void Clear(bool force)
        {
            bool allow_log_clearing = false;
#if ALLOW_LOG_CLEARING
            allow_log_clearing = true;
#endif
            if (force || allow_log_clearing) { txtLog.Clear(); }
        }
        #region sub-classes
        public class LogStream : TextWriter
        {
            private StringBuilder strMessage = new StringBuilder();
            public LogStream() : this(null) { }
            public LogStream(LogWriter text) : base() { _text_writer = text; this.NewLine = "\n"; }
            private LogWriter _text_writer;
            #region Overriden Methods
            public override Encoding Encoding { get { return Encoding.UTF8; } }
            public override void Write(bool value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(char value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(char[] buffer) { _text_writer.SetLogText(new string(buffer)); }
            public override void Write(decimal value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(double value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(float value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(int value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(long value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(object value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(string value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(uint value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(ulong value) { _text_writer.SetLogText(value.ToString()); }
            public override void Write(string format, object arg0) { _text_writer.SetLogText(string.Format(format, arg0)); }
            public override void Write(string format, params object[] arg) { _text_writer.SetLogText(string.Format(format, arg)); }
            public override void Write(char[] buffer, int index, int count)
            {
                byte[] t = new byte[count];
                MemoryStream ms = new MemoryStream();
                StreamWriter sw = new StreamWriter(ms);
                sw.AutoFlush = true;
                sw.Write(buffer, index, count);
                sw.Close();
                _text_writer.SetLogText(Encoding.GetString(ms.ToArray()));
            }
            public override void Write(string format, object arg0, object arg1) { _text_writer.SetLogText(string.Format(format, arg0, arg1)); }
            public override void Write(string format, object arg0, object arg1, object arg2) { _text_writer.SetLogText(string.Format(format, arg0, arg1, arg2)); }
            public override void WriteLine() { _text_writer.SetLogText(System.Environment.NewLine); }
            public override void WriteLine(bool value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            public override void WriteLine(char value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            public override void WriteLine(char[] buffer) { _text_writer.SetLogText(string.Format("{0}{1}", new string(buffer), System.Environment.NewLine)); }
            public override void WriteLine(decimal value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            public override void WriteLine(double value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            public override void WriteLine(float value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            public override void WriteLine(int value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            public override void WriteLine(long value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            public override void WriteLine(object value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            [SecuritySafeCritical]
            public override void WriteLine(string value) { _text_writer.SetLogText(string.Format("{0}{1}", value, System.Environment.NewLine)); }
            public override void WriteLine(uint value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            public override void WriteLine(ulong value) { _text_writer.SetLogText(string.Format("{0}{1}", value.ToString(), System.Environment.NewLine)); }
            public override void WriteLine(string format, object arg0) { _text_writer.SetLogText(string.Format("{0}{1}", string.Format(format, arg0), System.Environment.NewLine)); }
            public override void WriteLine(string format, params object[] arg) { _text_writer.SetLogText(string.Format("{0}{1}", string.Format(format, arg), System.Environment.NewLine)); }
            public override void WriteLine(char[] buffer, int index, int count)
            {
                byte[] t = new byte[count];
                MemoryStream ms = new MemoryStream();
                StreamWriter sw = new StreamWriter(ms);
                sw.AutoFlush = true;
                sw.Write(buffer, index, count);
                sw.Close();
                _text_writer.SetLogText(string.Format("{0}{1}",Encoding.GetString(ms.ToArray()),System.Environment.NewLine));
            }
            public override void WriteLine(string format, object arg0, object arg1) { _text_writer.SetLogText(string.Format("{0}{1}", string.Format(format, arg0, arg1), System.Environment.NewLine)); }
            public override void WriteLine(string format, object arg0, object arg1, object arg2) { _text_writer.SetLogText(string.Format("{0}{1}", string.Format(format, arg0, arg1, arg2), System.Environment.NewLine)); }
            #endregion
        }
        #endregion

        private void autoscroll_timer_Tick(object sender, EventArgs e)
        {           
            //try
            //{
            //    if (this.DesignMode) { return; }
            //    AUTO_SCROLL = true;
            //    ////txtLog.ScrollToEnd();
            //    //txtLog.SelectionStart = txtLog.Text.Length - 100;
            //    //txtLog.ScrollToCaret();
            //    //txtLog.Refresh();

            //    //txtLog.SelectionStart = 0;
            //    //txtLog.ScrollToCaret();
            //    //txtLog.Refresh();

            //    //int last_line_position = -1;
            //    //int position = -1;
            //    int len = txtLog.Text.Length;
            //    //StringReader sr = new StringReader(this.StreamToString());
            //    //string line = "";
            //    //while ((line = sr.ReadLine()) != null)
            //    //{
            //    //    position += (line.Length * 2);
            //    //    last_line_position = (line.Length * 2);
            //    //    //if (line.EndsWith("/n"))
            //    //    //{
            //    //    //    position++;
            //    //    //}
            //    //    //logger.VerboseDebug.WriteLine("current line: {0}", line);
            //    //}
            //    txtLog.SelectionStart = len;
            //    txtLog.ScrollToCaret();
            //    txtLog.Refresh();
            //    //autoscroll_timer.Enabled = false;
            //    FIRST_LOAD = false;
            //}
            //catch { }

        }

        private void logupdater_DoWork(object sender, DoWorkEventArgs e)
        {
            string message = e.Argument.ToString();
            SetLogText(string.Format("{0}", message));
        }

        private void logupdater_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {

        }

        private void LogWriter_Load(object sender, EventArgs e)
        {
            txtLog.SelectionStart = 0;
            txtLog.ScrollToCaret();
        }

        private void chkAutoScroll_CheckedChanged(object sender, EventArgs e)
        {
            this.AutoScroll = chkAutoScroll.Checked;
        }
    }
}