//
// Copyright (C) 2010 Jackson Harper (jackson@manosdemono.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.ComponentModel;
using System.Globalization;


namespace Manos.Routing
{
	public class HtmlFormDataTypeConverter : TypeConverter
	{
		public HtmlFormDataTypeConverter (Type dest_type)
		{
			if (dest_type == null)
				throw new ArgumentNullException ("dest_type");
			
			DestinationType = dest_type;
		}
		
		public Type DestinationType {
			get;
			private set;
		}
		
		public override bool CanConvertFrom (ITypeDescriptorContext context, Type source_type)	
		{
			return source_type == typeof (string);
		}
		
		public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
		{
			if (DestinationType == typeof (bool)) {
				
				if (value == null)
					return false;
				
				string str = (string) value;

				if (String.Compare ("on", str, StringComparison.InvariantCultureIgnoreCase) == 0)
					return true;
				
				if (String.Compare ("off", str, StringComparison.InvariantCultureIgnoreCase) == 0)
					return false;
			}
			
			// Technically I am supposed to throw NotSupportedException here, but lets
			// at least pretend to be effecient.
			return null;
		}
	}
}