/*
    * Copyright 2014 James Pether Sörling
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *   http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   *	$Id$
   *  $HeadURL$
  */
  package com.hack23.cia.web.impl.ui.application.views.pageclicklistener;
  
  import java.net.URI;
  import java.net.URISyntaxException;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.hack23.cia.service.api.action.common.ServiceResponse.ServiceResult;
  import com.hack23.cia.service.api.action.user.SetGoogleAuthenticatorCredentialRequest;
  import com.hack23.cia.service.api.action.user.SetGoogleAuthenticatorCredentialResponse;
  import com.vaadin.ui.Button.ClickEvent;
  import com.vaadin.ui.Button.ClickListener;
  import com.vaadin.ui.Notification;
  import com.vaadin.ui.UI;
  import com.vaadin.ui.VerticalLayout;
  import com.vaadin.ui.Window;
  
  import fi.jasoft.qrcode.QRCode;
  
  /**
   * The Class SetGoogleAuthenticatorCredentialClickListener.
   */
  public final class SetGoogleAuthenticatorCredentialClickListener implements ClickListener {
  
  
  	/** The Constant PROBLEM_DISPLAYING_QR_CODE. */
  	private static final String PROBLEM_DISPLAYING_QR_CODE = "Problem displaying qr code";
  
  	/** The Constant WINDOW_POSITION. */
  	private static final int WINDOW_POSITION = 100;
  
  	/** The Constant GOOGLE_AUTHENTICATOR_QR_CODE. */
  	private static final String GOOGLE_AUTHENTICATOR_QR_CODE = "Google Authenticator QR code";
  
  	/** The Constant MODAL_WINDOW_SIZE. */
  	private static final String MODAL_WINDOW_SIZE = "200px";
  
  	/** The Constant QR_CODE_IMAGE_SIZE. */
  	private static final String QR_CODE_IMAGE_SIZE = "175px";
  
  	/** The Constant QR_CODE. */
  	private static final String QR_CODE = "QR code";
  
  	/** The Constant PROBLEM_ENABLE_GOOGLE_AUTHENTICATOR_SESSIONID. */
  	private static final String PROBLEM_ENABLE_GOOGLE_AUTHENTICATOR_SESSIONID = "Problem enable google authenticator, sessionid{}";
  
  	/** The Constant PROBLEM_ENABLE_GOOGLE_AUTHENTICATOR. */
  	private static final String PROBLEM_ENABLE_GOOGLE_AUTHENTICATOR = "Problem enable google authenticator";
  
  	/** The Constant ERROR_MESSAGE. */
  	private static final String ERROR_MESSAGE = "Error message";
  
  	/** The Constant serialVersionUID. */
  	private static final long serialVersionUID = 1L;
  
  	/** The Constant LOGGER. */
  	private static final Logger LOGGER = LoggerFactory.getLogger(SetGoogleAuthenticatorCredentialClickListener.class);
  
  	/** The google auth request. */
  	private final SetGoogleAuthenticatorCredentialRequest googleAuthRequest;
  
  	/**
  	 * Instantiates a new sets the google authenticator credential click
  	 * listener.
  	 *
  	 * @param googleAuthRequest
  	 *            the google auth request
  	 */
  	public SetGoogleAuthenticatorCredentialClickListener(final SetGoogleAuthenticatorCredentialRequest googleAuthRequest) {
  		this.googleAuthRequest = googleAuthRequest;
  	}
  
  	@Override
  	public void buttonClick(final ClickEvent event) {
  		final SetGoogleAuthenticatorCredentialResponse response = (SetGoogleAuthenticatorCredentialResponse) ApplicationMangerAccess.getApplicationManager().service(googleAuthRequest);
  
  		if (ServiceResult.SUCCESS == response.getResult()) {
  
  			try {
  				final URI keyUri = new URI(response.getOtpAuthTotpURL());
 				final QRCode qrCode = new QRCode(QR_CODE, keyUri.toASCIIString());
 				qrCode.setHeight(QR_CODE_IMAGE_SIZE);
 				qrCode.setWidth(QR_CODE_IMAGE_SIZE);
 
 				final Window mywindow = new Window(GOOGLE_AUTHENTICATOR_QR_CODE);
 				mywindow.setHeight(MODAL_WINDOW_SIZE);
 				mywindow.setWidth(MODAL_WINDOW_SIZE);
 
 				mywindow.setPositionX(WINDOW_POSITION);
 				mywindow.setPositionY(WINDOW_POSITION);
 
 				final VerticalLayout panelContent = new VerticalLayout();
 
 				mywindow.setContent(panelContent);
 				panelContent.addComponent(qrCode);
 
 				mywindow.setModal(true);
 				UI.getCurrent().addWindow(mywindow);
 
 			} catch (final URISyntaxException e) {
 				LOGGER.warn(PROBLEM_DISPLAYING_QR_CODE,e);
 				Notification.show(PROBLEM_DISPLAYING_QR_CODE,
 		                  ERROR_MESSAGE,
 		                  Notification.Type.WARNING_MESSAGE);
 			}
 
 		} else {
 			Notification.show(PROBLEM_ENABLE_GOOGLE_AUTHENTICATOR,
 	                  ERROR_MESSAGE,
 	                  Notification.Type.WARNING_MESSAGE);
 			LOGGER.info(PROBLEM_ENABLE_GOOGLE_AUTHENTICATOR_SESSIONID,googleAuthRequest.getSessionId());
 		}
 	}
 }