using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using Microsoft.Clm;
using Microsoft.Clm.Common;
using Microsoft.Clm.Common.Requests;
using Microsoft.Clm.BusinessLayer.SmartCard.BaseCsp;

namespace Tailspin.Clm.Smartcard
{
	public class CustomCardInitializer : ICardInitialization, IDisposable
	{
		private DefaultCardInitialization defaultCardInitialization;

		public CustomCardInitializer()
		{
			// Allocate default Smart Card initializer
			defaultCardInitialization = new DefaultCardInitialization();
			// TODO: Perform custom class initialization here
	}

		public void Initialize(string configData, string defaultAdminKeyData)
		{
			//Communicate that this function was called.
			System.Diagnostics.Trace.WriteLine(" CustomCardInitializer.Initialize was called ");
			// Perform default Smart Card initialization
			// defaultCardInitializer formats the card, sets a cardID if one is not present,, creates space for PIN History cache, 
			// and also performs operations defined in the BaseCSP spec to ready the card.

			defaultCardInitialization.Initialize(configData, defaultAdminKeyData);
			//TODO: Perform custom card initialization here
			// Eg: Creating additional files, loading applications etc..
			// This is also a good place to set the adminKey of the card. Note default initializer will diversify if specified in CLM configuration.
	}

		public Guid GenerateCardId(Guid requestUuid)
		{
			//Communicate that this function was called.
			System.Diagnostics.Trace.WriteLine(" CustomCardInitializer.GenerateCardId was called ");
			// TODO: The following method returns a sequential card ID from the default initializer.  Replace this call with your own custom ID generation/synchronization process.
			// NOTE: Card IDs need to be unique across all cards issued! Rely on an automatically unique ID type such as a GUID
			return defaultCardInitialization.GenerateCardId(requestUuid);
	}

		// GetCardChallengeResponse takes a parameter of type ICardContext.
		// This parameter contains information about the card being processed,
		// specifically, the card's unique ID and its answer-to-reset
		// (ATR) string.
		public byte[] GetCardChallengeResponse(ICardContext card, byte[] challenge, bool useDiversifiedKey)
		{
			//Communicate that this function was called.
			System.Diagnostics.Trace.WriteLine(" CustomCardInitializer.GetCardChallengeResponse was called ");

			// TODO: The following method returns the default challenge/response.  Replace this call with your own custom response based on your custom keys (see GetDiversifiedAdminKey), formatted as a byte array.
			// See BaseCSP specification to learn how to create Response for a given card Challenge.
			return defaultCardInitialization.GetCardChallengeResponse(card, challenge, useDiversifiedKey);
	}

		// GetDiversifiedAdminKey takes a parameter of type ICardContext.
		// This parameter contains information about the card being processed,
		// specifically, the card's unique ID and its answer-to-reset
		// (ATR) string.
		// It returns the diversified key as an object of type SymmetricKey. 
		// You can encrypt items using this object by calling its Encrypt() method.
		public SymmetricKey GetDiversifiedAdminKey(ICardContext card)
		{
			//Communicate that this function was called.
			System.Diagnostics.Trace.WriteLine(" CustomCardInitializer.GetDiversifiedAdminKey was called ");

		 // TODO: The following method returns the diversified admin key.  Replace this call with your own custom key diversification process.
			return defaultCardInitialization.GetDiversifiedAdminKey(card);
	}

		// This property returns the default administrative encryption key.
		// It returns the key as an object of type SymmetricKey. You can encrypt items using this object by calling its Encrypt() method.
		public SymmetricKey DefaultAdminKey
		{
			get
			{
				//Communicate that this function was called.
				System.Diagnostics.Trace.WriteLine(" CustomCardInitializer.DefaultAdminKey was called ");

				return defaultCardInitialization.DefaultAdminKey;
		}
	}
	
		#region IDisposable Members

		public void Dispose()
		{
			//Communicate that this function was called.
			System.Diagnostics.Trace.WriteLine(" CustomCardInitializer.Dispose was called ");

			defaultCardInitialization.Dispose();
	}

		#endregion
}
}