//
// RouteValueDictionary.cs
//
// Author:
//	Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2008 Novell Inc. http://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;
using System.Collections.Generic;
using System.Globalization;
using System.Security.Permissions;
using System.Web;

using PairCollection = System.Collections.Generic.ICollection<System.Collections.Generic.KeyValuePair<string, object>>;

namespace System.Web.Routing
{
	[AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
	[AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
	public class RouteValueDictionary : IDictionary<string, object>
	{
		internal class CaseInsensitiveStringComparer : IEqualityComparer<string>
		{
			public static readonly CaseInsensitiveStringComparer Instance = new CaseInsensitiveStringComparer ();

			public int GetHashCode (string obj)
			{
				return obj.ToLower (CultureInfo.InvariantCulture).GetHashCode ();
			}

			public bool Equals (string obj1, string obj2)
			{
				return String.Equals (obj1, obj2, StringComparison.OrdinalIgnoreCase);
			}
		}

		Dictionary<string,object> d = new Dictionary<string,object> (CaseInsensitiveStringComparer.Instance);

		public RouteValueDictionary ()
		{
		}

		public RouteValueDictionary (IDictionary<string, object> dictionary)
		{
			if (dictionary == null)
				throw new ArgumentNullException ("dictionary");
			foreach (var p in dictionary)
				Add (p.Key, p.Value);
		}

		public RouteValueDictionary (object values) // anonymous type instance
		{
			if (values == null)
				return;

			foreach (var fi in values.GetType ().GetFields ())
				Add (fi.Name, fi.GetValue (values));
			foreach (var pi in values.GetType ().GetProperties ())
				Add (pi.Name, pi.GetValue (values, null));
		}

		public int Count {
			get { return d.Count; }
		}

		bool PairCollection.IsReadOnly {
			get { return ((PairCollection) d).IsReadOnly; }
		}

		ICollection<string> IDictionary<string, object>.Keys {
			get { return d.Keys; }
		}

		ICollection<Object> IDictionary<string, object>.Values {
			get { return d.Values; }
		}

		public object this [string key] {
			get { object v; return d.TryGetValue (key, out v) ? v : null; }
			set { d [key] = value; }
		}

		public Dictionary<string, object>.KeyCollection Keys {
			get { return d.Keys; }
		}

		public Dictionary<string, object>.ValueCollection Values {
			get { return d.Values; }
		}

		public void Add (string key, object value)
		{
			d.Add (key, value);
		}

		public void Clear ()
		{
			d.Clear ();
		}

		public bool ContainsKey (string key)
		{
			return d.ContainsKey (key);
		}

		public bool ContainsValue (object value)
		{
			return d.ContainsValue (value);
		}

		public Dictionary<string, object>.Enumerator GetEnumerator ()
		{
			return d.GetEnumerator ();
		}

		void ICollection<KeyValuePair<string, object>>.Add (KeyValuePair<string, object> item)
		{
			((PairCollection) d).Add (item);
		}

		bool ICollection<KeyValuePair<string, object>>.Contains (KeyValuePair<string, object> item)
		{
			return ((PairCollection) d).Contains (item);
		}

		void ICollection<KeyValuePair<string, object>>.CopyTo (KeyValuePair<string, object> [] array, int arrayIndex)
		{
			((PairCollection) d).CopyTo (array, arrayIndex);
		}

		bool ICollection<KeyValuePair<string, object>>.Remove (KeyValuePair<string, object> item)
		{
			return ((PairCollection) d).Remove (item);
		}

		IEnumerator<KeyValuePair<string, object>> IEnumerable<KeyValuePair<string, object>>.GetEnumerator()
		{
			return d.GetEnumerator ();
		}

		IEnumerator IEnumerable.GetEnumerator ()
		{
			return d.GetEnumerator ();
		}

		public bool Remove (string key)
		{
			return d.Remove (key);
		}

		public bool TryGetValue (string key, out object value)
		{
			return d.TryGetValue (key, out value);
		}
	}
}