// 
// BaseRefactoringContext.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.Linq;
using System.Threading;
using ICSharpCode.NRefactory.CSharp.Resolver;
using ICSharpCode.NRefactory.CSharp.TypeSystem;
using ICSharpCode.NRefactory.Semantics;
using ICSharpCode.NRefactory.TypeSystem;
using ICSharpCode.NRefactory.TypeSystem.Implementation;
using ICSharpCode.NRefactory.Editor;

namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
	public abstract class BaseRefactoringContext
	{
		protected readonly CSharpAstResolver resolver;
		readonly CancellationToken cancellationToken;
		
		public virtual bool Supports(Version version)
		{
			return true;
		}
		
		public CancellationToken CancellationToken {
			get { return cancellationToken; }
		}
		
		public virtual AstNode RootNode {
			get { return resolver.RootNode; }
		}

		public ICompilation Compilation {
			get { return resolver.Compilation; }
		}

		public BaseRefactoringContext (ICSharpCode.NRefactory.CSharp.Resolver.CSharpAstResolver resolver, System.Threading.CancellationToken cancellationToken)
		{
			this.resolver = resolver;
			this.cancellationToken = cancellationToken;
		}

		#region Resolving
		public ResolveResult Resolve (AstNode node)
		{
			return resolver.Resolve (node, cancellationToken);
		}
		
		public CSharpResolver GetResolverStateBefore(AstNode node)
		{
			return resolver.GetResolverStateBefore (node, cancellationToken);
		}
		
		public CSharpResolver GetResolverStateAfter(AstNode node)
		{
			return resolver.GetResolverStateAfter (node, cancellationToken);
		}

		public IType ResolveType (AstType type)
		{
			return resolver.Resolve (type, cancellationToken).Type;
		}
		
		public IType GetExpectedType (Expression expression)
		{
			return resolver.GetExpectedType(expression, cancellationToken);
		}
		
		public Conversion GetConversion (Expression expression)
		{
			return resolver.GetConversion(expression, cancellationToken);
		}
		#endregion
		
		public abstract Script StartScript();

	}
	
}