using System;

using System.IO;

using UnityEngine;

namespace ModuleManager.Logging

{

public class StreamLogger : IBasicLogger, IDisposable

{

private const string DATETIME_FORMAT_STRING = "yyyy-MM-dd HH:mm:ss.fff";

private readonly Stream stream;

private readonly StreamWriter streamWriter;

private bool disposed = false;

public StreamLogger(Stream stream)

{

this.stream = stream ?? throw new ArgumentNullException(nameof(stream));

if (!stream.CanWrite) throw new ArgumentException("must be writable", nameof(stream));

streamWriter = new StreamWriter(stream);

}

public void Log(LogType logType, string message)

{

if (disposed) throw new InvalidOperationException("Object has already been disposed");

string prefix;

if (logType == LogType.Log)

prefix = "LOG";

else if (logType == LogType.Warning)

prefix = "WRN";

else if (logType == LogType.Error)

prefix = "ERR";

else if (logType == LogType.Assert)

prefix = "AST";

else if (logType == LogType.Exception)

prefix = "EXC";

else

prefix = "UNK";

streamWriter.WriteLine("[{0} {1}] {2}", prefix, DateTime.Now.ToString(DATETIME_FORMAT_STRING), message);

}

public void Exception(string message, Exception exception)

{

Log(LogType.Exception, exception?.ToString() ?? "<null exception>");

}

public void Dispose()

{

// Flushes and closes the StreamWriter and the underlying stream

streamWriter.Close();

disposed = true;

}

}

}