﻿/*
 * Copyright 2010-2014 Bastian Eicher
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

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

namespace ZeroInstall.Store.Model.Design
{
    /// <summary>
    /// Converts <see cref="string"/>s to <see cref="Arg"/>s and <see cref="Arg"/>s/<see cref="ForEachArgs"/> to <see cref="string"/>s.
    /// </summary>
    public class ArgBaseConverter : TypeConverter
    {
        /// <inheritdoc/>
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            return (sourceType == typeof(string)) || base.CanConvertFrom(context, sourceType);
        }

        /// <inheritdoc/>
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            var stringValue = value as string;
            return stringValue != null
                ? new Arg {Value = stringValue}
                : base.ConvertFrom(context, culture, value);
        }

        /// <inheritdoc/>
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            if (value != null && destinationType == typeof(string)) return value.ToString();
            return base.ConvertTo(context, culture, value, destinationType);
        }
    }
}
