#region Copyright & License Information
/*
 * Copyright 2007-2012 The OpenRA Developers (see AUTHORS)
 * This file is part of OpenRA, which is free software. It is made
 * available to you under the terms of the GNU General Public License
 * as published by the Free Software Foundation. For more information,
 * see COPYING.
 */
#endregion

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

namespace OpenRA.Utility
{
	class Program
	{
		static void Main(string[] args)
		{
			var actions = new Dictionary<string, Action<string[]>>()
			{
				{ "--settings-value", Command.Settings },
				{ "--shp", Command.ConvertPngToShp },
				{ "--png", Command.ConvertShpToPng },
				{ "--extract", Command.ExtractFiles },
				{ "--remap", Command.RemapShp },
				{ "--transpose", Command.TransposeShp },
				{ "--docs", Command.ExtractTraitDocs },
				{ "--map-hash", Command.GetMapHash },
			};

			if (args.Length == 0) { PrintUsage(); return; }

			Log.LogPath = Platform.SupportDir + "Logs" + Path.DirectorySeparatorChar;

			try
			{
				var action = Exts.WithDefault(_ => PrintUsage(), () => actions[args[0]]);
				action(args);
			}
			catch (Exception e)
			{
				Log.AddChannel("utility", "utility.log");
				Log.Write("utility", "Received args: {0}", args.JoinWith(" "));
				Log.Write("utility", "{0}", e);

				Console.WriteLine("Error: Utility application crashed. See utility.log for details");
				throw;
			}
		}

		static void PrintUsage()
		{
			Console.WriteLine("Usage: OpenRA.Utility.exe [OPTION] [ARGS]");
			Console.WriteLine();
			Console.WriteLine("  --settings-value KEY     Get value of KEY from settings.yaml");
			Console.WriteLine("  --shp PNGFILE [PNGFILE ...]     Combine a list of PNG images into a SHP");
			Console.WriteLine("  --png SPRITEFILE PALETTE [--noshadow] [--nopadding]     Convert a shp/tmp/R8 to a series of PNGs, optionally removing shadow");
			Console.WriteLine("  --extract MOD[,MOD]* FILES [--userdir]     Extract files from mod packages to the current (or user) directory");
			Console.WriteLine("  --remap SRCMOD:PAL DESTMOD:PAL SRCSHP DESTSHP     Remap SHPs to another palette");
			Console.WriteLine("  --transpose SRCSHP DESTSHP START N M [START N M ...]     Transpose the N*M block of frames starting at START.");
			Console.WriteLine("  --docs MOD     Generate trait documentation in MarkDown format.");
			Console.WriteLine("  --map-hash MAPFILE     Generate hash of specified oramap file.");
		}

		static string GetNamedArg(string[] args, string arg)
		{
			if (args.Length < 2)
				return null;

			var i = Array.IndexOf(args, arg);
			if (i < 0 || i == args.Length - 1)  // doesnt exist, or doesnt have a value.
				return null;

			return args[i + 1];
		}
	}
}