// 
// IInspector.cs
//  
// Author:
//       Mike Krüger <mkrueger@xamarin.com>
// 
// Copyright (c) 2012 Xamarin <http://xamarin.com>
// 
// 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.Linq;

namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
	/// <summary>
	/// The code issue provider gets a list of all code issues in a syntax tree.
	/// </summary>
	public abstract class CodeIssueProvider
	{
		SubIssueAttribute[] subIssueAttributes;

		public bool HasSubIssues {
			get {
				Initialize ();
				return subIssueAttributes.Length > 0;
			}
		}

		public IEnumerable<SubIssueAttribute> SubIssues {
			get {
				Initialize ();
				return subIssueAttributes;
			}
		}

		static readonly SubIssueAttribute[] emptyAttributes = new SubIssueAttribute[0];
		void Initialize()
		{
			if (subIssueAttributes != null)
				return;
			subIssueAttributes = GetType().GetCustomAttributes(typeof(SubIssueAttribute), false).OfType<SubIssueAttribute>().ToArray() ?? emptyAttributes;
		}

		/// <summary>
		/// Gets all code issues inside a syntax tree.
		/// </summary>
		/// <param name='context'>
		/// The refactoring context of the issues to get.
		/// </param>
		/// <param name='subIssue'>
		/// The name of the sub issue to run.
		/// </param>
		public virtual IEnumerable<CodeIssue> GetIssues (BaseRefactoringContext context, string subIssue = null)
		{
			return GetIssues(context);
		}
	}
}