package ve.gob.cenditel.tibisaymovil;

import java.security.PrivateKey;
import java.security.cert.X509Certificate;

import android.annotation.SuppressLint;
import android.content.Context;
import android.security.KeyChain;
import android.security.KeyChainAliasCallback;
import android.security.KeyChainException;

@SuppressLint("NewApi")
public class AndroidKeyChain extends KeyChainStrategy implements KeyChainAliasCallback {

    private static final long serialVersionUID = -5618428393037452012L;
    private static Context context;

    private AndroidKeyChain() {}

    public static AndroidKeyChain getInstance() {

        if (KeyChainStrategy.theInstance == null) {

            KeyChainStrategy.theInstance = new AndroidKeyChain();
        }
        return (AndroidKeyChain) KeyChainStrategy.theInstance;
    }

    @Override
    public void setClientActivity(KeyChainClientActivity activity) {

        super.setClientActivity(activity);
        AndroidKeyChain.context = activity.getApplicationContext();
    }

    @Override
    public void choosePrivateKeyAlias() {

        KeyChain.choosePrivateKeyAlias(KeyChainStrategy.activity, this, null, null, null, -1, null);
    }

    @Override
	public void choosePrivateKeyList() {
        KeyChain.choosePrivateKeyAlias(KeyChainStrategy.activity, this, null, null, null, -1, null);
		
	}

	@Override
    public X509Certificate[] getCertificateChain(String alias)
    throws InterruptedException, KeystoreException {

        try {
            return KeyChain.getCertificateChain(AndroidKeyChain.context, alias);
        } catch (KeyChainException e) {
            throw new KeystoreException(e);
        }
    }

    @Override
    public PrivateKey getPrivateKey(String alias)
    throws InterruptedException, KeystoreException {

        try {
            return KeyChain.getPrivateKey(AndroidKeyChain.context, alias);
        } catch (KeyChainException e) {
            throw new KeystoreException(e);
        }
    }

    //TODO:
 	@Override
 	public int deleteCertificate(String alias) throws KeystoreException{
 		/*
 		try {
 			KeyStore trusted = getKeystore();
 	        trusted.deleteEntry(alias);
 		} catch (Exception e) {
 			throw new KeystoreException(e);
 		}
 		*/
 		return 0;
 		
 	}
    
    @Override
    public void alias(String alias) {

        KeyChainStrategy.activity.setAlias(alias);
    }
}