#region License



// Copyright (c) 2012 Gareth Lennox (garethl@dwakn.com)

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without modification,

// are permitted provided that the following conditions are met:

// 

//     * Redistributions of source code must retain the above copyright notice,

//       this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above copyright notice,

//       this list of conditions and the following disclaimer in the documentation

//       and/or other materials provided with the distribution.

//     * Neither the name of Gareth Lennox nor the names of its

//       contributors may be used to endorse or promote products derived from this

//       software without specific prior written permission.

//  

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE

// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.



#endregion



using System;

using System.Collections.Generic;

using ZebraFlickr.CommandLine.Exceptions;



namespace ZebraFlickr.CommandLine

{

	/// <summary>

	/// Default argument decoder

	/// </summary>

	public class DefaultArgumentDecoder : IArgumentDecoder

	{

		private ArgumentMap _map;



		#region IArgumentDecoder Members



		/// <summary>

		/// Decode an argument

		/// </summary>

		/// <param name="item">Item to set the argument on</param>

		/// <param name="argument">The argument</param>

		public virtual void Decode(object item, Parser.Argument argument)

		{

			Type type = _map.Property.PropertyType;

			if (type == typeof (string))

			{

				_map.Property.SetValue(item, argument.Value, null);

			}

			else if (type == typeof (bool))

			{

				_map.Property.SetValue(item, true, null);

			}

			else if (type == typeof (int))

			{

				int num;

				if (!int.TryParse(argument.Value, out num))

				{

					throw new ValidationException(string.Format("Unable to parse argument {0}", argument.Key));

				}

				_map.Property.SetValue(item, num, null);

			}

			else if (type == typeof (DateTime))

			{

				DateTime dateTime;

				if (DateTime.TryParse(argument.Value, out dateTime))

				{

					_map.Property.SetValue(item, dateTime, null);

				}

				else

				{

					throw new ValidationException(string.Format("Unable to parse argument {0}", argument.Key));

				}

			}

			else

			{

				throw new ValidationException(string.Format("Unable to parse argument {0}", argument.Key));

			}

		}



		/// <summary>

		/// Initialize the decoder with the map

		/// </summary>

		/// <param name="map">The argument map</param>

		public void Initialize(ArgumentMap map)

		{

			_map = map;

		}



		/// <summary>

		/// Did the decoder find a value?

		/// </summary>

		public bool HasValue

		{

			get

			{

				return ((_map.Property.PropertyType != typeof (bool)) &&

				        (_map.Property.PropertyType != typeof (IList<bool>)));

			}

		}



		#endregion

	}

}