// Object identifier converter.
// Copyright (C) 2008-2010 Malcolm Crowe, Lex Li, and other contributors.
// 
// 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 GSF.Net.Snmp
{
#if !NETFX_CORE
    /// <summary>
    /// The <see cref="TypeConverter"/> dedicated for the <see cref="ObjectIdentifier"/> class.
    /// </summary>
    public sealed class ObjectIdentifierConverter : TypeConverter
    {
        /// <summary>
        /// Returns whether this converter can convert an object of the given type to the type of this converter.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="sourceType"></param>
        /// <returns></returns>
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            return sourceType == typeof(string) || base.CanConvertFrom(context, sourceType);
        }

        /// <summary>
        /// Returns whether this converter can convert the object to the specified type.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="destinationType"></param>
        /// <returns></returns>
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
        {
            return destinationType == typeof(string) || base.CanConvertTo(context, destinationType);
        }

        /// <summary>
        /// Converts the given object to the type of this converter, using the specified context and culture information.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="culture"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")]
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            string s = value as string;
            if (s != null)
            {
                try
                {
                    uint[] oidVal = ObjectIdentifier.Convert(s);
                    return new ObjectIdentifier(oidVal);
                }
                catch
                {
                }
            }
    
            return base.ConvertFrom(context, culture, value);
        }
    
        /// <summary>
        /// Converts the given value object to the specified type, using the arguments.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="culture"></param>
        /// <param name="value"></param>
        /// <param name="destinationType"></param>
        /// <returns></returns>
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            ObjectIdentifier oid = value as ObjectIdentifier;
            if (destinationType == typeof(string) && oid != null)
            {
                return oid.ToString(); // GetTextual(null);
            }
    
            return base.ConvertTo(context, culture, value, destinationType);
        }

        /// <summary>
        /// Returns a <see cref="System.String"/> that represents this instance.
        /// </summary>
        /// <returns>
        /// A <see cref="System.String"/> that represents this instance.
        /// </returns>
        public override string ToString()
        {
            return "Object identifier converter";
        }
    }
#endif
}