using System;
using System.Reflection;
using System.Globalization;

using Melanchall.DryWetMidi.Common;

using SBRL.Utilities;

namespace MusicBoxConverter
{
	class MainClass
	{
		public static int Main(string[] args)
		{
			CultureInfo.CurrentCulture = new CultureInfo("en-GB", false);
			string inputFilename = "";
			string outputFilename = "";
			bool debug = false;
			MusicBox targetMusicBox = MusicBox.Note30Corrected;
			float scaleFactorX = -1f;
			float scaleFactorY = -1f;

			for(int i = 0; i < args.Length; i++)
			{
				switch(args[i])
				{
					case "-i":
					case "--input":
						inputFilename = args[++i];
						break;

					case "-o":
					case "--output":
						outputFilename = args[++i];
						break;

					case "--auto-dev":
						inputFilename = "/home/sbrl/Music/Sheets/HappyBirthday.midi";
						//inputFilename = "/tmp/Scale.midi";

						outputFilename = "/tmp/test.svg";
						break;

					case "--debug":
						debug = true;
						break;

					case "--box":
						targetMusicBox = (MusicBox)typeof(MusicBox).GetField(
							args[++i],
							BindingFlags.GetField |
							BindingFlags.Static |
							BindingFlags.Public
						).GetValue(null);
						break;
					
					case "-sx":
					case "--scale-factor-x":
						scaleFactorX = float.Parse(args[++i], CultureInfo.InvariantCulture);
						break;
					
					case "-sy":
					case "--scale-factor-y":
						scaleFactorY = float.Parse(args[++i], CultureInfo.InvariantCulture);
						break;

					case "-h":
					case "--help":
						Console.Error.WriteLine(EmbeddedFiles.ReadAllText("MusicBoxConverter.Help.txt"));
						return 0;

					default:
						Console.Error.WriteLine("Error: Unknown option {0}.", args[i]);
						return 1;
				}
			}

			if(inputFilename == string.Empty) {
				Console.Error.WriteLine("Error: No input file specified.");
				return 1;
			}
			if(outputFilename == string.Empty) {
				Console.Error.WriteLine("Error: No output file specified.");
				return 1;
			}

			MusicBoxScoreGenerator converter = new MusicBoxScoreGenerator(
				inputFilename,
				targetMusicBox
			) {
				Debug = debug
			};
			
			if(scaleFactorX > 0)
				converter.SetScaleFactorX(scaleFactorX);
			if(scaleFactorY > 0)
				converter.SetScaleFactorY(scaleFactorY);
			converter.Output(outputFilename);

			return 0;
		}
	}
}