/*
    Copyright (C) 2014-2019 de4dot@gmail.com

    This file is part of dnSpy

    dnSpy is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    dnSpy is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with dnSpy.  If not, see <http://www.gnu.org/licenses/>.
*/

using System;
using System.ComponentModel;
using System.Globalization;

namespace dnSpy.Contracts.Images {
	/// <summary>
	/// Converts a <see cref="string"/> to an <see cref="ImageReference"/> or vice versa
	/// </summary>
	public sealed class ImageReferenceConverter : TypeConverter {
		/// <summary>
		/// 
		/// </summary>
		/// <param name="context"></param>
		/// <param name="sourceType"></param>
		/// <returns></returns>
		public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) =>
			sourceType == typeof(string) || base.CanConvertFrom(context, sourceType);

		/// <summary>
		/// 
		/// </summary>
		/// <param name="context"></param>
		/// <param name="destinationType"></param>
		/// <returns></returns>
		public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) =>
			destinationType == typeof(string) || base.CanConvertTo(context, destinationType);

		/// <summary>
		/// 
		/// </summary>
		/// <param name="context"></param>
		/// <param name="culture"></param>
		/// <param name="value"></param>
		/// <returns></returns>
		public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
			if (value is string s) {
				if (ImageReference.TryParse(s, out var imageReference))
					return imageReference;

			}
			return base.ConvertFrom(context, culture, value);
		}

		/// <summary>
		/// 
		/// </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) {
			if (destinationType == typeof(string) && value is ImageReference)
				return ((ImageReference)value).ToString();
			return base.ConvertTo(context, culture, value, destinationType);
		}
	}
}