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 * Copyright 2018, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
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 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.as.test.integration.ws.authentication.policy;

import org.apache.commons.io.IOUtils;
import org.jboss.arquillian.container.test.api.Deployer;
import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.container.test.api.RunAsClient;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.arquillian.test.api.ArquillianResource;
import org.jboss.as.cli.CommandContext;
import org.jboss.as.cli.CommandLineException;
import org.jboss.as.controller.client.ModelControllerClient;
import org.jboss.as.controller.operations.common.Util;
import org.jboss.as.network.NetworkUtils;
import org.jboss.as.test.integration.management.util.CLIOpResult;
import org.jboss.as.test.integration.management.util.CLITestUtil;
import org.jboss.as.test.integration.management.util.ServerReload;
import org.jboss.as.test.integration.ws.authentication.policy.resources.EchoService;
import org.jboss.as.test.integration.ws.authentication.policy.resources.EchoServiceRemote;
import org.jboss.as.test.integration.ws.authentication.policy.resources.PicketLinkSTSService;
import org.jboss.as.test.shared.TestSuiteEnvironment;
import org.jboss.dmr.ModelNode;
import org.jboss.logging.Logger;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.shrinkwrap.api.asset.StringAsset;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import org.jboss.ws.api.configuration.ClientConfigUtil;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.picketlink.common.exceptions.fed.WSTrustException;
import org.picketlink.identity.federation.api.wstrust.WSTrustClient;
import org.picketlink.identity.federation.core.saml.v2.util.DocumentUtil;
import org.picketlink.identity.federation.core.wstrust.plugins.saml.SAMLUtil;
import org.picketlink.trust.jbossws.SAML2Constants;
import org.w3c.dom.Element;

import javax.xml.namespace.QName;
import javax.xml.ws.BindingProvider;
import javax.xml.ws.Service;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.InetAddress;
import java.net.URL;
import java.net.UnknownHostException;
import java.nio.charset.StandardCharsets;
import java.security.SecurityPermission;

import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.fail;
import static org.jboss.as.test.shared.integration.ejb.security.PermissionUtils.createPermissionsXmlAsset;

/**
 * Before the fix web service with STS (Picketlink) returned wrong subject with PolicyContext("javax.security.auth.subject.container").
 * This test calls SimpleSecurityManager and checks if no exception is thrown and PolicyContext.getContext("javax.security.auth.Subject.container") should not be null.
 * Test for [ WFLY-8946 ].
 *
 * @author Daniel Cihak
 */
@RunWith(Arquillian.class)
public class AuthenticationPolicyContextTestCase {

    private static Logger LOGGER = Logger.getLogger(AuthenticationPolicyContextTestCase.class);

    private static final String PICKETLINK_STS = "picketlink-sts";
    private static final String PICKETLINK_STS_WS = "picketlink-sts-ws";
    private static final String RESOURCE_DIR = "org/jboss/as/test/integration/ws/authentication/policy/resources/";

    private static final String HOST = TestSuiteEnvironment.getServerAddress();
    private static final int PORT_OFFSET = 0;
    private static final String USERNAME = "UserA";
    private static final String PASSWORD = "PassA";
    private static final String DEFAULT_HOST = getHostname();
    private static final int DEFAULT_PORT = 8080;

    private volatile ModelControllerClient modelControllerClient;
    private static WSTrustClient wsClient;
    private volatile CommandContext commandCtx;
    private volatile ByteArrayOutputStream consoleOut = new ByteArrayOutputStream();

    @ArquillianResource
    private static volatile Deployer deployer;

    @Deployment(name = PICKETLINK_STS, managed = false, testable = false)
    public static Archive<?> createPicketlinkStsDeployment() {
        WebArchive war = ShrinkWrap.create(WebArchive.class, PICKETLINK_STS + ".war");
        war.addClass(PicketLinkSTSService.class);
        war.addAsResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/sts-users.properties", "sts-users.properties");
        war.addAsResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/sts-roles.properties", "sts-roles.properties");
        war.addAsResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/WEB-INF/sts_keystore.jks", "sts_keystore.jks");
        war.addAsWebInfResource(createFilteredAsset("resources/WEB-INF/picketlink-sts.xml"), "classes/picketlink-sts.xml");
        war.addAsWebInfResource(createFilteredAsset("resources/WEB-INF/wsdl/PicketLinkSTS.wsdl"), "wsdl/PicketLinkSTS.wsdl");
        war.addAsWebInfResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/WEB-INF/beans.xml", "beans.xml");
        war.addAsWebInfResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/WEB-INF/jboss-web.xml", "jboss-web.xml");
        war.addAsWebInfResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/WEB-INF/jboss-wsse-server.xml", "jboss-wsse-server.xml");
        war.addAsWebInfResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/WEB-INF/web.xml", "web.xml");
        war.addAsManifestResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/META-INF/jboss-deployment-structure.xml", "jboss-deployment-structure.xml");
        war.addAsManifestResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/META-INF/jboss-webservices.xml", "jboss-webservices.xml");
        war.addAsManifestResource(createPermissionsXmlAsset(
                new SecurityPermission("getPolicy"),
                new RuntimePermission("org.jboss.security.getSecurityContext")
        ), "permissions.xml");
        return war;
    }

    @Deployment(name = PICKETLINK_STS_WS, managed = false, testable = false)
    public static Archive<?> createPicketlinkStsWsDeployment() {
        WebArchive war = ShrinkWrap.create(WebArchive.class, PICKETLINK_STS_WS + ".war");
        war.addClasses(EchoServiceRemote.class);
        war.addClasses(EchoService.class);
        war.addAsResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/sp-users.properties", "sp-users.properties");
        war.addAsResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/sp-roles.properties", "sp-roles.properties");
        war.addAsResource(createFilteredAsset("resources/sts-config.properties"), "sts-config.properties");
        war.addAsWebInfResource(createFilteredAsset("resources/WEB-INF/wsdl/PicketLinkSTS.wsdl"), "wsdl/PicketLinkSTS.wsdl");
        war.addAsWebInfResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/WEB-INF/beans.xml", "beans.xml");
        war.addAsWebInfResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/WEB-INF/jboss-web-ws.xml", "jboss-web-ws.xml");
        war.addAsWebInfResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/WEB-INF/jboss-wsse-server.xml", "jboss-wsse-server.xml");
        war.addAsManifestResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/META-INF/jboss-deployment-structure.xml", "jboss-deployment-structure.xml");
        war.addAsManifestResource(AuthenticationPolicyContextTestCase.class.getPackage(), "resources/META-INF/jboss-webservices.xml", "jboss-webservices.xml");
        war.addAsResource(AuthenticationPolicyContextTestCase.class.getPackage(), "dummmy-ws-handler.xml", "org/jboss/as/test/integration/ws/authentication/policy/resources/dummmy-ws-handler.xml");
        war.addAsManifestResource(createPermissionsXmlAsset(
                new SecurityPermission("getPolicy"),
                new RuntimePermission("org.jboss.security.getSecurityContext")
        ), "permissions.xml");
        return war;
    }

    private static StringAsset createFilteredAsset(String resourceName) {
        return new StringAsset(replaceNodeAddress(resourceName));
    }

    private static String replaceNodeAddress(String resourceName) {
        String content = null;
        try {
            content = IOUtils.toString(AuthenticationPolicyContextTestCase.class.getResourceAsStream(resourceName), StandardCharsets.UTF_8);
        } catch (IOException e) {
            throw new RuntimeException("Exception during replacing node address in resource", e);
        }
        return content.replaceAll("@node0@", NetworkUtils.formatPossibleIpv6Address(System.getProperty("node0", "127.0.0.1")));
    }

    @Before
    public void before() {
        try {
            initServerConfiguration(PICKETLINK_STS, PICKETLINK_STS_WS);
        } catch (Throwable t) {
            LOGGER.error("Server configuration initialization failed.", t.getMessage(), t);
            fail("Throwable:" + t.getMessage());
        }
    }

    @After
    public void after() throws Exception {
        deployer.undeploy(PICKETLINK_STS);
        deployer.undeploy(PICKETLINK_STS_WS);
        this.serverConfigurationCleanup();
    }

    @BeforeClass
    public static void initClient() throws Exception {
        wsClient = new WSTrustClient("PicketLinkSTS", "PicketLinkSTSPort",
                getHttpUrl(DEFAULT_HOST, DEFAULT_PORT) + "picketlink-sts/PicketLinkSTS", new WSTrustClient.SecurityInfo(USERNAME, PASSWORD));
    }

    @AfterClass
    public static void closeClient() throws Exception {
        if (wsClient != null) {
            wsClient.close();
        }
    }

    private static String getHttpUrl(String host, int port) {
        return "http://" + host + ":" + port + "/";
    }

    private static String getHostname() {
        String hostname = System.getProperty("node0");

        try {
            hostname = NetworkUtils.formatPossibleIpv6Address(InetAddress.getByName(hostname).getHostAddress());
        } catch (UnknownHostException ex) {
            String message = "Cannot resolve host address: " + hostname;
            throw new RuntimeException(message, ex);
        }

        if ("127.0.0.1".equals(hostname)) {
            return "localhost";
        }

        return hostname;
    }

    private void initServerConfiguration(String deployment1, String deployment2) throws Exception {
        modelControllerClient = ModelControllerClient.Factory.create(HOST, getManagementPort());
        commandCtx = CLITestUtil.getCommandContext(HOST, getManagementPort(), null, consoleOut, -1);
        commandCtx.connectController();

        File cliFile = File.createTempFile("add-security-domain-", ".cli");
        try (FileOutputStream fos = new FileOutputStream(cliFile)) {
            IOUtils.copy(AuthenticationPolicyContextTestCase.class.getResourceAsStream("add-security-domain.cli"), fos);
        }
        runBatch(cliFile);
        cliFile.delete();
        reload();

        cliFile = File.createTempFile("add-jaxws-endpoint-", ".cli");
        try (FileOutputStream fos = new FileOutputStream(cliFile)) {
            IOUtils.copy(AuthenticationPolicyContextTestCase.class.getResourceAsStream("add-jaxws-endpoint.cli"), fos);
        }
        runBatch(cliFile);
        cliFile.delete();
        reload();

        deployer.deploy(deployment1);
        deployer.deploy(deployment2);
    }

    private void serverConfigurationCleanup() throws Exception {
        modelControllerClient = ModelControllerClient.Factory.create(HOST, getManagementPort());
        commandCtx = CLITestUtil.getCommandContext(HOST, getManagementPort(), null, consoleOut, -1);
        commandCtx.connectController();

        File cliFile = File.createTempFile("remove_endpoint_and_domains-", ".cli");
        try (FileOutputStream fos = new FileOutputStream(cliFile)) {
            IOUtils.copy(AuthenticationPolicyContextTestCase.class.getResourceAsStream("remove_endpoint_and_domains.cli"), fos);
        }
        runBatch(cliFile);
        cliFile.delete();
        reload();
    }

    /**
     * Sends command line to CLI.
     *
     * @param line specifies the command line.
     * @param ignoreError if set to false, asserts that handling the line did not result in a
     *        {@link org.jboss.as.cli.CommandLineException}.
     *
     * @return true if the CLI is in a non-error state following handling the line
     */
    public boolean sendLine(String line, boolean ignoreError) {
        consoleOut.reset();
        if (ignoreError) {
            commandCtx.handleSafe(line);
            return commandCtx.getExitCode() == 0;
        } else {
            try {
                commandCtx.handle(line);
            } catch (CommandLineException e) {
                StringWriter stackTrace = new StringWriter();
                e.printStackTrace(new PrintWriter(stackTrace));
                fail(String.format("Failed to execute line '%s'%n%s", line, stackTrace.toString()));
            }
        }
        return true;
    }

    private boolean runBatch(File batchFile) throws Exception {
        sendLine("run-batch --file=\"" + batchFile.getAbsolutePath() + "\" --headers={allow-resource-service-restart=true} -v", false);
        return new CLIOpResult(ModelNode.fromStream(new ByteArrayInputStream(consoleOut.toByteArray())))
                .isIsOutcomeSuccess();
    }

    private void reload() {
        ModelNode operation = Util.createOperation("reload", null);
        ServerReload.executeReloadAndWaitForCompletion(modelControllerClient, operation, (int) SECONDS.toMillis(90), HOST,
                getManagementPort());
    }

    public int getManagementPort() {
        return 9990 + PORT_OFFSET;
    }

    /**
     * Test gets SAML assertion by token using the web service in deployment picketlink-sts.war.
     * Afterwards web service EchoService from the deployment picketlink-sts-ws.war is called using role testRole and
     * security domain sp created during test initialization.
     *
     * @throws Exception
     */
    @Test
    @RunAsClient
    public void test() throws Exception {
        Element assertion = null;
        try {
            LOGGER.debug("Invoking token service to get SAML assertion for " + USERNAME);
            assertion = wsClient.issueToken(SAMLUtil.SAML2_TOKEN_TYPE);
            String domElementAsString = DocumentUtil.getDOMElementAsString(assertion);
            LOGGER.debug("assertion: " + domElementAsString);
            LOGGER.debug("SAML assertion for " + USERNAME + " successfully obtained!");
        } catch (WSTrustException wse) {
            LOGGER.error("Unable to issue assertion: " + wse.getMessage());
            wse.printStackTrace();
            System.exit(1);
        }

        try {
            URL wsdl = new URL("http://" + TestSuiteEnvironment.getServerAddress() + ":" + TestSuiteEnvironment.getHttpPort() +"/picketlink-sts-ws/EchoService?wsdl");
            QName serviceName = new QName("http://ws.picketlink.sts.jboss.org/", "EchoServiceService");
            Service service = Service.create(wsdl, serviceName);
            EchoServiceRemote port = service.getPort(new QName("http://ws.picketlink.sts.jboss.org/", "EchoServicePort"),
                    EchoServiceRemote.class);

            BindingProvider bp = (BindingProvider) port;
            ClientConfigUtil.setConfigHandlers(bp, "standard-jaxws-client-config.xml", "SAML WSSecurity Client");
            bp.getRequestContext().put(SAML2Constants.SAML2_ASSERTION_PROPERTY, assertion);

            port.echo("Test");
        } finally {
            if (wsClient != null) {
                wsClient.close();
            }
        }
    }
}
