using System;
using System.Collections.Generic;
using System.IO;

namespace BizHawk.Common
{
	public static class Log
	{
		static Log()
		{
			// You can set current desired logging settings here.
			// Production builds should be done with all logging disabled.
			LogToConsole = true;
			//LogToFile = true;
			//LogFilename = "d:/bizhawk.log";
			//EnableDomain("CD");
			//EnableDomain("CPU");
			//EnableDomain("VDC");  
			//EnableDomain("MEM");
		}

		// ============== Logging Domain Configuration ==============

		private static readonly List<string> EnabledLogDomains = new List<string>();

		public static void EnableDomain(string domain)
		{
			if (EnabledLogDomains.Contains(domain) == false)
				EnabledLogDomains.Add(domain);
		}

		public static void DisableDomain(string domain)
		{
			if (EnabledLogDomains.Contains(domain))
				EnabledLogDomains.Remove(domain);
		}

		// ============== Logging Action Configuration ==============

		public static Action<string> LogAction = DefaultLogger;

		// NOTEs are only logged if the domain is enabled.
		// ERRORs are logged regardless.

		public static void Note(string domain, string msg, params object[] vals)
		{
			if (EnabledLogDomains.Contains(domain))
				LogAction(String.Format(msg, vals));
		}

		public static void Error(string domain, string msg, params object[] vals)
		{
			LogAction(String.Format(msg, vals));
		}

		// ============== Default Logger Action ==============

		public static Stream HACK_LOG_STREAM;

		private static readonly bool LogToConsole = false;
		private static bool LogToFile = false;

		private const string LogFilename = "bizhawk.txt";
		private static StreamWriter writer;

		private static void DefaultLogger(string message)
		{
			if (LogToConsole)
				Console.WriteLine(message);

			if (LogToFile && writer == null)
				writer = new StreamWriter(LogFilename);

			if (LogToFile)
			{
				writer.WriteLine(message);
				writer.Flush();
			}
		}
	}
}