// SharpDevelop samples
// Copyright (c) 2006, AlphaSierraPapa
// All rights reserved.
//
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// permitted provided that the following conditions are met:
//
// - Redistributions of source code must retain the above copyright notice, this list
//   of conditions and the following disclaimer.
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// - Redistributions in binary form must reproduce the above copyright notice, this list
//   of conditions and the following disclaimer in the documentation and/or other materials
//   provided with the distribution.
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using System;
using System.CodeDom.Compiler;
using System.IO;
using System.Text.RegularExpressions;

namespace Mono.Build.Tasks
{
	public class MonoCSharpCompilerResultsParser
	{
		public const string NormalErrorPattern = @"(?<file>.*)\((?<line>\d+),(?<column>\d+)\):\s+(?<error>\w+)\s+(?<number>[\d\w]+):\s+(?<message>.*)";
		public const string GeneralErrorPattern = @"(?<error>.+?)\s+(?<number>[\d\w]+?):\s+(?<message>.*)";

		Regex normalError = new Regex(NormalErrorPattern, RegexOptions.Compiled);
		Regex generalError = new Regex(GeneralErrorPattern, RegexOptions.Compiled);
		
		public MonoCSharpCompilerResultsParser()
		{
		}
		
		public CompilerError ParseLine(string line)
		{
			// try to match standard mono errors
			Match match = normalError.Match(line); 
			if (match.Success) {
				CompilerError error = new CompilerError();
				error.Column      = Int32.Parse(match.Result("${column}"));
				error.Line        = Int32.Parse(match.Result("${line}"));
				error.FileName    = Path.GetFullPath(match.Result("${file}"));
				error.IsWarning   = match.Result("${error}") == "warning";
				error.ErrorNumber = match.Result("${number}");
				error.ErrorText   = match.Result("${message}");
				return error;
			} else {
				match = generalError.Match(line);
				if (match.Success) {
					CompilerError error = new CompilerError();
					error.IsWarning   = match.Result("${error}") == "warning";
					error.ErrorNumber = match.Result("${number}");
					error.ErrorText   = match.Result("${message}");
					return error;
				}
			}
			return null;
		}
	}
}