// Copyright (c) 2018 Siegfried Pammer
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Linq;
using System.Reflection;

namespace ICSharpCode.ILSpyX.Analyzers
{
	[MetadataAttribute]
	[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
	public class ExportAnalyzerAttribute : ExportAttribute, IAnalyzerMetadata
	{
		public ExportAnalyzerAttribute() : base("Analyzer", typeof(IAnalyzer))
		{ }

		public required string Header { get; init; }

		public int Order { get; set; }

		public static IEnumerable<(ExportAnalyzerAttribute AttributeData, Type AnalyzerType)> GetAnnotatedAnalyzers()
		{
			foreach (var type in typeof(ExportAnalyzerAttribute).Assembly.GetTypes())
			{
				var exportAnalyzerAttribute = type.GetCustomAttribute(typeof(ExportAnalyzerAttribute), false) as ExportAnalyzerAttribute;
				if (exportAnalyzerAttribute is not null)
				{
					yield return (exportAnalyzerAttribute, type);
				}
			}
		}
	}
}