/*
 * Copyright 2004,2005 The Apache Software Foundation.
 *
 * 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.
 */

package org.apache.rahas;

import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMFactory;
import org.apache.neethi.Policy;
import org.apache.ws.secpolicy.SP11Constants;
import org.opensaml.Configuration;
import org.opensaml.saml1.core.Assertion;
import org.opensaml.saml1.core.AuthenticationStatement;
import org.opensaml.saml1.core.ConfirmationMethod;
import org.opensaml.saml1.core.SubjectStatement;
import org.opensaml.xml.io.Unmarshaller;
import org.opensaml.xml.io.UnmarshallerFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import java.io.ByteArrayInputStream;
import java.util.List;

/**
 *
 * @author Ruchith Fernando (ruchith.fernando@gmail.com)
 */
public class RahasSAMLTokenUTForBearerTest extends TestClient {
    public OMElement getRequest() {
        try {
            OMElement rstElem = TrustUtil.createRequestSecurityTokenElement(RahasConstants.VERSION_05_02);
            TrustUtil.createRequestTypeElement(RahasConstants.VERSION_05_02, rstElem, RahasConstants.REQ_TYPE_ISSUE);
            OMElement tokenTypeElem = TrustUtil.createTokenTypeElement(RahasConstants.VERSION_05_02, rstElem);
            tokenTypeElem.setText(RahasConstants.TOK_TYPE_SAML_10);
            
            TrustUtil.createAppliesToElement(rstElem, "http://localhost:5555/axis2/services/SecureService", this.getWSANamespace());
            TrustUtil.createKeyTypeElement(RahasConstants.VERSION_05_02,
                    rstElem, RahasConstants.KEY_TYPE_BEARER);
            TrustUtil.createKeySizeElement(RahasConstants.VERSION_05_02, rstElem, 256);
            
            return rstElem;
            
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public String getServiceRepo() {
        return "rahas_service_repo_3";
    }

    public String getRequestAction() throws TrustException {
        return TrustUtil.getActionValue(RahasConstants.VERSION_05_02, RahasConstants.RST_ACTION_ISSUE);
    }

    public void validateRsponse(OMElement resp) {
        OMElement rst = resp.getFirstChildWithName(new QName(RahasConstants.WST_NS_05_02,
                                                             RahasConstants.IssuanceBindingLocalNames.
                                                                     REQUESTED_SECURITY_TOKEN));
        assertNotNull("RequestedSecurityToken missing", rst);

        OMElement elem = rst.getFirstChildWithName(new QName(RahasConstants.SAML_NS, "Assertion"));
        assertNotNull("Missing SAML Assertion", elem);

        Assertion assertion = getAssertionObjectFromOMElement(elem);
        List<AuthenticationStatement> authStmts = assertion.getAuthenticationStatements();
        assertNotNull("At least one Authentication Statement should be present in the assertion",
                   authStmts.get(0));

        SubjectStatement authStmt = authStmts.get(0);
        List<ConfirmationMethod> subConfirmationMethods = authStmt.getSubject().
                getSubjectConfirmation().getConfirmationMethods();
        assertNotNull("At least one Subject Confirmation method should be present in the SAML Subject",
                   subConfirmationMethods.get(0));
        assertEquals("Subject Confirmation should be BEARER : urn:oasis:names:tc:SAML:1.0:cm:bearer",
                         RahasConstants.SAML11_SUBJECT_CONFIRMATION_BEARER,
                         subConfirmationMethods.get(0).getConfirmationMethod());
    }

    /* (non-Javadoc)
     * @see org.apache.rahas.TestClient#getServicePolicy()
     */
    public Policy getServicePolicy() throws Exception {
        return this.getPolicy("test-resources/rahas/policy/service-policy-transport-binding.xml");
    }

    /* (non-Javadoc)
     * @see org.apache.rahas.TestClient#getSTSPolicy()
     */
    public Policy getSTSPolicy() throws Exception {
        return this.getPolicy("test-resources/rahas/policy/sts-policy-transport-binding.xml");
    }

    /* (non-Javadoc)
     * @see org.apache.rahas.TestClient#getRSTTemplate()
     */
    public OMElement getRSTTemplate() throws TrustException {
        OMFactory factory = OMAbstractFactory.getOMFactory();
        OMElement elem = factory.createOMElement(SP11Constants.REQUEST_SECURITY_TOKEN_TEMPLATE);
        
        TrustUtil.createTokenTypeElement(RahasConstants.VERSION_05_02, elem).setText(RahasConstants.TOK_TYPE_SAML_10);
        TrustUtil.createKeyTypeElement(RahasConstants.VERSION_05_02, elem, RahasConstants.KEY_TYPE_BEARER);
        
        return elem;
    }
    
    public int getTrstVersion() {
        return RahasConstants.VERSION_05_02;
    }

    /**
     * Build the SAML Assertion object from the OMElement for the ease of processing
     * @param omElement OMElement containing the SAML Assertion
     * @return Assertion object
     */
    private Assertion getAssertionObjectFromOMElement(OMElement omElement){
        Assertion assertion = null;
        try {
            DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
            documentBuilderFactory.setNamespaceAware(true);
            DocumentBuilder docBuilder = documentBuilderFactory.newDocumentBuilder();
            Document document = docBuilder.parse(new ByteArrayInputStream(omElement.toString().getBytes()));
            Element element = document.getDocumentElement();
            UnmarshallerFactory unmarshallerFactory = Configuration
                    .getUnmarshallerFactory();
            Unmarshaller unmarshaller = unmarshallerFactory
                    .getUnmarshaller(element);
            assertion = (org.opensaml.saml1.core.Assertion) unmarshaller
                    .unmarshall(element);
        } catch (Exception e){
            e.printStackTrace();
        }
        return  assertion;
    }

	@Override
	public String getClientPolicyPath() {
		return "/rahas/3.xml";
	}
}