/*
 * 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.brooklyn.entity.webapp.jetty;

import static java.lang.String.format;

import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.apache.brooklyn.core.entity.Entities;
import org.apache.brooklyn.entity.webapp.JavaWebAppSshDriver;
import org.apache.brooklyn.location.ssh.SshMachineLocation;
import org.apache.brooklyn.util.collections.MutableList;
import org.apache.brooklyn.util.collections.MutableMap;
import org.apache.brooklyn.util.net.Networking;
import org.apache.brooklyn.util.os.Os;
import org.apache.brooklyn.util.ssh.BashCommands;
import org.apache.brooklyn.util.text.Strings;

public class Jetty6SshDriver extends JavaWebAppSshDriver implements Jetty6Driver {

    public Jetty6SshDriver(Jetty6ServerImpl entity, SshMachineLocation machine) {
        super(entity, machine);
    }

    @Override
    protected String getLogFileLocation() {
        // TODO no wildcard, also there is .requests.log
        return Os.mergePathsUnix(getRunDir(), "logs", "*.stderrout.log");
    }

    @Override
    protected String getDeploySubdir() {
       return "webapps";
    }

    @Override
    public void preInstall() {
        resolver = Entities.newDownloader(this);
        setExpandedInstallDir(Os.mergePaths(getInstallDir(), resolver.getUnpackedDirectoryName(format("jetty-%s", getVersion()))));
    }

    @Override
    public void install() {
        List<String> urls = resolver.getTargets();
        String saveAs = resolver.getFilename();

        List<String> commands = new LinkedList<String>();
        commands.addAll(BashCommands.commandsToDownloadUrlsAs(urls, saveAs));
        commands.add(BashCommands.INSTALL_ZIP);
        commands.add("unzip "+saveAs);

        newScript(INSTALLING)
                .body.append(commands)
                .execute();
    }

    @Override
    public void customize() {
        newScript(CUSTOMIZING)
                .body.append(
                        // create app-specific dirs
                        "mkdir logs contexts webapps",
                        // link to the binary directories; silly that we have to do this but jetty has only one notion of "jetty.home" 
                        // (jetty.run is used only for writing the pid file, not for looking up webapps or even for logging)
                        format("for x in start.jar bin contrib modules lib extras; do ln -s %s/$x $x ; done", getExpandedInstallDir()),
                        // copy config files across
                        format("for x in etc resources; do cp -r %s/$x $x ; done", getExpandedInstallDir())
                    )
                .execute();


        // Copy configuration XML files across
        String destinationBrooklynConfig = Os.mergePathsUnix(getRunDir(), "etc/jetty-brooklyn.xml");
        copyTemplate("classpath://org/apache/brooklyn/entity/webapp/jetty/jetty-brooklyn.xml", destinationBrooklynConfig);
        String customConfigTemplateUrl = getConfigXmlTemplateUrl();
        if (Strings.isNonEmpty(customConfigTemplateUrl)) {
            String destinationConfigFile = Os.mergePathsUnix(getRunDir(), "etc/jetty-custom.xml");
            copyTemplate(customConfigTemplateUrl, destinationConfigFile);
        }

        getEntity().deployInitialWars();
    }

    private String getConfigXmlTemplateUrl() {
        return getEntity().getConfig(Jetty6Server.CONFIG_XML_TEMPLATE_URL);
    }

    @Override
    public void launch() {
        Map ports = MutableMap.of("httpPort", getHttpPort(), "jmxPort", getJmxPort(), "rmiRegistryPort", getRmiRegistryPort());
        Networking.checkPortsValid(ports);

        newScript(MutableMap.of(USE_PID_FILE, false), LAUNCHING)
                .body.append(
                        "./bin/jetty.sh start jetty-brooklyn.xml jetty.xml jetty-logging.xml jetty-stats.xml " +
                                (Strings.isEmpty(getConfigXmlTemplateUrl()) ? "" : "jetty-custom.xml ") +
                                ">> $RUN_DIR/console 2>&1 < /dev/null",
                        "for i in {1..10} ; do\n" +
                        "    if [ -s "+getLogFileLocation()+" ]; then exit; fi\n" +
                        "    sleep 1\n" +
                        "done",
                        "echo \"Couldn't determine if jetty-server is running (log file is still empty); continuing but may subsequently fail\""
                    )
                .execute();
        log.debug("launched jetty");
    }

    @Override
    public boolean isRunning() {
        return newScript(MutableMap.of(USE_PID_FILE, "jetty.pid"), CHECK_RUNNING).execute() == 0;
    }

    @Override
    public void stop() {
        newScript(MutableMap.of(USE_PID_FILE, false), STOPPING)
                .body.append("./bin/jetty.sh stop")
                .execute();
    }

    // not used, but an alternative to stop which might be useful
    public void kill1() {
        newScript(MutableMap.of(USE_PID_FILE, "jetty.pid"), STOPPING).execute();
    }

    public void kill9() {
        newScript(MutableMap.of(USE_PID_FILE, "jetty.pid"), KILLING).execute();
    }

    @Override
    public void kill() {
        kill9();
    }

    @Override
    protected List<String> getCustomJavaConfigOptions() {
        return MutableList.<String>builder()
                .addAll(super.getCustomJavaConfigOptions())
                .add("-Xms200m")
                .add("-Xmx800m")
                .add("-XX:MaxPermSize=400m")
                .build();
    }

    @Override
    public Map<String, String> getShellEnvironment() {
        return MutableMap.<String, String>builder()
                .putAll(super.getShellEnvironment())
                .put("JETTY_RUN", getRunDir())
                .put("JETTY_HOME", getRunDir())
                .put("JETTY_LOGS", Os.mergePathsUnix(getRunDir(), "logs"))
                .put("JETTY_PORT", getHttpPort().toString())
                .renameKey("JAVA_OPTS", "JAVA_OPTIONS")
                .build();
    }
}