//
// MetadataImporter.cs
//
// Author:
//	Atsushi Enomoto <atsushi@ximian.com>
//	Ankit Jain <jankit@novell.com>
//
// Copyright (C) 2005 Novell, Inc.  http://www.novell.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.Collections.ObjectModel;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.Web.Services.Description;
using System.Xml;

namespace System.ServiceModel.Description
{
	[MonoTODO]
	public abstract class MetadataImporter
	{
		KeyedByTypeCollection<IPolicyImportExtension> policy_extensions;
		Collection<MetadataConversionError> errors = new Collection<MetadataConversionError> ();
		Dictionary<Object,Object> state = new Dictionary<Object, Object> ();

		internal MetadataImporter (IEnumerable<IPolicyImportExtension> policyImportExtensions)
		{
			if (policyImportExtensions != null) {
				policy_extensions = new KeyedByTypeCollection<IPolicyImportExtension> (policyImportExtensions);
				return;
			}
			
			//FIXME: Complete the list
			policy_extensions = new KeyedByTypeCollection<IPolicyImportExtension> ();
			policy_extensions.Add (new TransportBindingElementImporter ());
			policy_extensions.Add (new MessageEncodingBindingElementImporter ());
		}

		public Collection<MetadataConversionError> Errors {
			get { return errors; }
		}

		public KeyedByTypeCollection<IPolicyImportExtension> PolicyImportExtensions {
			get { return policy_extensions; }
		}

		public Dictionary<Object,Object> State {
			get { return state; }
		}

		public Dictionary<XmlQualifiedName,ContractDescription> KnownContracts {
			get { throw new NotImplementedException (); }
		}

		public abstract Collection<ContractDescription> ImportAllContracts ();

		public abstract ServiceEndpointCollection ImportAllEndpoints ();

		internal T GetState<T> () where T : class, new ()
		{
			object value;
			if (!state.TryGetValue (typeof(T), out value)) {
				value = new T ();
				state.Add (typeof(T), value);
			}
			return (T) value;
		}

		internal MetadataConversionError AddError (string message, params object[] args)
		{
			var error = new MetadataConversionError (string.Format (message, args));
			Errors.Add (error);
			return error;
		}
		
		internal MetadataConversionError AddWarning (string message, params object[] args)
		{
			var error = new MetadataConversionError (string.Format (message, args), true);
			Errors.Add (error);
			return error;
		}
		
		internal class MetadataImportException : Exception
		{
			public MetadataConversionError Error {
				get;
				private set;
			}
			
			public MetadataImportException (MetadataConversionError error)
				: base (error.Message)
			{
				this.Error = error;
			}
			
			public MetadataImportException (MetadataConversionError error, Exception inner)
				: base (error.Message, inner)
			{
				this.Error = error;
			}
		}

	}
}