/*******************************************************************************
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 *******************************************************************************/
package at.gv.egovernment.moa.id.protocols.oauth20.protocol;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.opensaml.saml2.core.Attribute;

import at.gv.egovernment.moa.id.commons.db.dao.config.OAOAUTH20;
import at.gv.egovernment.moa.id.config.ConfigurationException;
import at.gv.egovernment.moa.id.config.auth.AuthConfigurationProvider;
import at.gv.egovernment.moa.id.protocols.oauth20.OAuth20Constants;
import at.gv.egovernment.moa.id.protocols.oauth20.exceptions.OAuth20AccessDeniedException;
import at.gv.egovernment.moa.id.protocols.oauth20.exceptions.OAuth20Exception;
import at.gv.egovernment.moa.id.protocols.oauth20.exceptions.OAuth20InvalidGrantException;
import at.gv.egovernment.moa.id.protocols.oauth20.exceptions.OAuth20WrongParameterException;

class OAuth20TokenRequest extends OAuth20BaseRequest {
	
	private static final long serialVersionUID = 1L;
	
	private String code;
	private String grantType;
	private String clientID;
	private String clientSecret;
	
	/**
	 * @return the code
	 */
	public String getCode() {
		return code;
	}
	
	/**
	 * @param code
	 *            the code to set
	 */
	public void setCode(String code) {
		this.code = code;
	}
	
	/**
	 * @return the grantType
	 */
	public String getGrantType() {
		return grantType;
	}
	
	/**
	 * @param grantType
	 *            the grantType to set
	 */
	public void setGrantType(String grantType) {
		this.grantType = grantType;
	}
	
	/**
	 * @return the clientID
	 */
	public String getClientID() {
		return clientID;
	}
	
	/**
	 * @param clientID
	 *            the clientID to set
	 */
	public void setClientID(String clientID) {
		this.clientID = clientID;
	}
	
	/**
	 * @return the clientSecret
	 */
	public String getClientSecret() {
		return clientSecret;
	}
	
	/**
	 * @param clientSecret
	 *            the clientSecret to set
	 */
	public void setClientSecret(String clientSecret) {
		this.clientSecret = clientSecret;
	}
	
	@Override
	protected void populateSpecialParameters(HttpServletRequest request) throws OAuth20Exception {
		this.setCode(this.getParam(request, OAuth20Constants.RESPONSE_CODE, true));
		this.setGrantType(this.getParam(request, OAuth20Constants.PARAM_GRANT_TYPE, true));
		this.setClientID(this.getParam(request, OAuth20Constants.PARAM_CLIENT_ID, true));
		this.setClientSecret(this.getParam(request, OAuth20Constants.PARAM_CLIENT_SECRET, true));
		
		// check for grant type
		if (!this.getGrantType().equals(OAuth20Constants.PARAM_GRANT_TYPE_VALUE_AUTHORIZATION_CODE)) {
			throw new OAuth20InvalidGrantException();
		}
		
		// check if client id and secret are ok
		try {
			// OAOAUTH20 cannot be null at this point. check was done in base request
			OAOAUTH20 oAuthConfig = AuthConfigurationProvider.getInstance().getOnlineApplicationParameter(this.getOAURL())
					.getoAuth20Config();
			
			if (!this.getClientID().equals(oAuthConfig.getOAuthClientId())) {
				throw new OAuth20AccessDeniedException();
			}
			
			if (!this.getClientSecret().equals(oAuthConfig.getOAuthClientSecret())) {
				throw new OAuth20AccessDeniedException();
			}
			
		}
		catch (ConfigurationException e) {
			throw new OAuth20WrongParameterException(OAuth20Constants.PARAM_CLIENT_ID);
		}
		
		//add valid parameters
		this.allowedParameters.add(OAuth20Constants.PARAM_SCOPE);
		this.allowedParameters.add(OAuth20Constants.PARAM_REDIRECT_URI);
	}

	/* (non-Javadoc)
	 * @see at.gv.egovernment.moa.id.moduls.RequestImpl#getRequestedAttributes()
	 */
	@Override
	public List<Attribute> getRequestedAttributes() {
		return null;
	}
}