/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.activemq.transport.stomp;

import java.io.File;
import java.io.IOException;
import java.net.Socket;
import java.security.ProtectionDomain;
import java.util.ArrayList;
import java.util.List;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.AutoFailTestSupport;
import org.apache.activemq.broker.BrokerPlugin;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.filter.DestinationMapEntry;
import org.apache.activemq.security.AuthenticationUser;
import org.apache.activemq.security.AuthorizationEntry;
import org.apache.activemq.security.AuthorizationMap;
import org.apache.activemq.security.AuthorizationPlugin;
import org.apache.activemq.security.DefaultAuthorizationMap;
import org.apache.activemq.security.SimpleAuthenticationPlugin;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.rules.TestName;

public class StompTestSupport {

    protected final AutoFailTestSupport autoFailTestSupport = new AutoFailTestSupport() {};
    protected BrokerService brokerService;
    protected int port;
    protected String jmsUri = "vm://localhost";
    protected StompConnection stompConnection = new StompConnection();
    protected ActiveMQConnectionFactory cf;

    @Rule public TestName name = new TestName();

    public File basedir() throws IOException {
        ProtectionDomain protectionDomain = getClass().getProtectionDomain();
        return new File(new File(protectionDomain.getCodeSource().getLocation().getPath()), "../..").getCanonicalFile();
    }

    public static void main(String[] args) throws Exception {
        final StompTestSupport s = new StompTestSupport();

        s.port = 5676;

        s.startBroker();
        while(true) {
            Thread.sleep(100000);
        }
    }

    public String getName() {
        return name.getMethodName();
    }

    @Before
    public void setUp() throws Exception {
        autoFailTestSupport.startAutoFailThread();
        startBroker();
        stompConnect();
    }

    @After
    public void tearDown() throws Exception {
        autoFailTestSupport.stopAutoFailThread();
        try {
            stompDisconnect();
        } catch (Exception ex) {
            // its okay if the stomp connection is already closed.
        } finally {
            stopBroker();
        }
    }

    public void startBroker() throws Exception {

        createBroker();

        applyBrokerPolicies();
        applyMemoryLimitPolicy();

        ArrayList<BrokerPlugin> plugins = new ArrayList<BrokerPlugin>();

        addStompConnector();
        addOpenWireConnector();

        cf = new ActiveMQConnectionFactory(jmsUri);

        BrokerPlugin authenticationPlugin = configureAuthentication();
        if (authenticationPlugin != null) {
            plugins.add(configureAuthorization());
        }

        BrokerPlugin authorizationPlugin = configureAuthorization();
        if (authorizationPlugin != null) {
            plugins.add(configureAuthentication());
        }

        if (!plugins.isEmpty()) {
            BrokerPlugin[] array = new BrokerPlugin[plugins.size()];
            brokerService.setPlugins(plugins.toArray(array));
        }

        brokerService.start();
        brokerService.waitUntilStarted();
    }

    protected void applyMemoryLimitPolicy() throws Exception {
    }

    protected void createBroker() throws Exception {
        brokerService = new BrokerService();
        brokerService.setPersistent(false);
        brokerService.setAdvisorySupport(false);
        brokerService.setSchedulerSupport(true);
        brokerService.setPopulateJMSXUserID(true);
    }

    protected BrokerPlugin configureAuthentication() throws Exception {
        List<AuthenticationUser> users = new ArrayList<AuthenticationUser>();
        users.add(new AuthenticationUser("system", "manager", "users,admins"));
        users.add(new AuthenticationUser("user", "password", "users"));
        users.add(new AuthenticationUser("guest", "password", "guests"));
        SimpleAuthenticationPlugin authenticationPlugin = new SimpleAuthenticationPlugin(users);

        return authenticationPlugin;
    }

    protected BrokerPlugin configureAuthorization() throws Exception {

        @SuppressWarnings("rawtypes")
        List<DestinationMapEntry> authorizationEntries = new ArrayList<DestinationMapEntry>();

        AuthorizationEntry entry = new AuthorizationEntry();
        entry.setQueue(">");
        entry.setRead("admins");
        entry.setWrite("admins");
        entry.setAdmin("admins");
        authorizationEntries.add(entry);
        entry = new AuthorizationEntry();
        entry.setQueue("USERS.>");
        entry.setRead("users");
        entry.setWrite("users");
        entry.setAdmin("users");
        authorizationEntries.add(entry);
        entry = new AuthorizationEntry();
        entry.setQueue("GUEST.>");
        entry.setRead("guests");
        entry.setWrite("guests,users");
        entry.setAdmin("guests,users");
        authorizationEntries.add(entry);
        entry = new AuthorizationEntry();
        entry.setTopic(">");
        entry.setRead("admins");
        entry.setWrite("admins");
        entry.setAdmin("admins");
        authorizationEntries.add(entry);
        entry = new AuthorizationEntry();
        entry.setTopic("USERS.>");
        entry.setRead("users");
        entry.setWrite("users");
        entry.setAdmin("users");
        authorizationEntries.add(entry);
        entry = new AuthorizationEntry();
        entry.setTopic("GUEST.>");
        entry.setRead("guests");
        entry.setWrite("guests,users");
        entry.setAdmin("guests,users");
        authorizationEntries.add(entry);
        entry = new AuthorizationEntry();
        entry.setTopic("ActiveMQ.Advisory.>");
        entry.setRead("guests,users");
        entry.setWrite("guests,users");
        entry.setAdmin("guests,users");
        authorizationEntries.add(entry);

        AuthorizationMap authorizationMap = new DefaultAuthorizationMap(authorizationEntries);
        AuthorizationPlugin authorizationPlugin = new AuthorizationPlugin(authorizationMap);

        return authorizationPlugin;
    }

    protected void applyBrokerPolicies() throws Exception {
        // NOOP here
    }

    protected void addOpenWireConnector() throws Exception {
    }

    protected void addStompConnector() throws Exception {
        TransportConnector connector = null;

        // Subclasses can tailor this list to speed up the test startup / shutdown
        connector = brokerService.addConnector("stomp://0.0.0.0:"+port);
        port = connector.getConnectUri().getPort();
    }

    public void stopBroker() throws Exception {
        if (brokerService != null) {
            brokerService.stop();
            brokerService.waitUntilStopped();
            brokerService = null;
        }
    }

    protected StompConnection stompConnect() throws Exception {
        if (stompConnection == null) {
            stompConnection = new StompConnection();
        }
        stompConnection.open(createSocket());
        return stompConnection;
    }

    protected StompConnection stompConnect(StompConnection connection) throws Exception {
        connection.open(createSocket());
        return stompConnection;
    }

    protected Socket createSocket() throws IOException {
        return new Socket("127.0.0.1", this.port);
    }

    protected String getQueueName() {
        return getClass().getName() + "." + name.getMethodName();
    }

    protected String getTopicName() {
        return getClass().getName() + "." + name.getMethodName();
    }

    protected void stompDisconnect() throws IOException {
        if (stompConnection != null) {
            stompConnection.close();
            stompConnection = null;
        }
    }
}
