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 *
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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package com.sun.enterprise.v3.admin.cluster;

import com.sun.enterprise.util.cluster.RemoteType;
import com.sun.enterprise.util.StringUtils;
import com.sun.enterprise.config.serverbeans.Node;
import com.sun.enterprise.config.serverbeans.Nodes;
import com.sun.enterprise.config.serverbeans.SshConnector;
import com.sun.enterprise.config.serverbeans.SshAuth;
import org.glassfish.api.ActionReport;
import org.glassfish.api.I18n;
import org.glassfish.api.Param;
import org.glassfish.api.admin.*;
import org.glassfish.api.admin.CommandRunner.CommandInvocation;
import org.glassfish.hk2.api.ServiceLocator;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.*;
import java.util.logging.Logger;
import javax.inject.Inject;

/**
 * Remote AdminCommand to update a remote node.  This command is run only on DAS.
 *
 * @author Joe Di Pol
 * @author Byron Nevins
 */
public abstract class UpdateNodeRemoteCommand implements AdminCommand  {

    @Inject
    private CommandRunner cr;

    @Inject
    ServiceLocator habitat;

    @Inject
    private Nodes nodes;

    @Param(name="name", primary = true)
    private String name;

    @Param(name="nodehost", optional=true)
    private String nodehost;

    @Param(name = "installdir", optional=true)
    private String installdir;

    @Param(name = "nodedir", optional=true)
    private String nodedir;

    // these are the variables set as parameters in subclasses
    // we can't set them as parameters in this class bacause of the names
    protected String remotePort;
    protected String remoteUser;
    protected String sshkeyfile;
    protected String remotepassword;
    protected String sshkeypassphrase;
    protected String windowsdomain;

    @Param(name =  "force", optional = true, defaultValue = "false")
    private boolean force;

    private static final String NL = System.getProperty("line.separator");

    private Logger logger = null;
    protected abstract void populateParameters();
    protected abstract RemoteType getType();
    protected abstract String getDefaultPort();

    protected final void executeInternal(AdminCommandContext context) {
        ActionReport report = context.getActionReport();
        StringBuilder msg = new StringBuilder();
        Node node = null;

        logger = context.getLogger();

        // Make sure Node is valid
        node = nodes.getNode(name);
        if (node == null) {
            String m = Strings.get("noSuchNode", name);
            logger.warning(m);
            report.setActionExitCode(ActionReport.ExitCode.FAILURE);
            report.setMessage(m);
            return;
        }
        if (node.isDefaultLocalNode()) {
            String m = Strings.get("update.node.config.defaultnode", name);
            logger.warning(m);
            report.setActionExitCode(ActionReport.ExitCode.FAILURE);
            report.setMessage(m);
            return;
        }

        // Ah the problems caused by hard-coding ssh into parameter names!
        populateParameters();

        // First create a map that holds the parameters and reflects what
        // the user passed on the command line.
        ParameterMap map = new ParameterMap();
        map.add("DEFAULT", name);
        map.add(NodeUtils.PARAM_INSTALLDIR, installdir);
        map.add(NodeUtils.PARAM_NODEHOST, nodehost);
        map.add(NodeUtils.PARAM_NODEDIR, nodedir);
        map.add(NodeUtils.PARAM_REMOTEPORT, remotePort);
        map.add(NodeUtils.PARAM_REMOTEUSER, remoteUser);
        map.add(NodeUtils.PARAM_SSHKEYFILE, sshkeyfile);
        map.add(NodeUtils.PARAM_REMOTEPASSWORD, remotepassword);
        map.add(NodeUtils.PARAM_SSHKEYPASSPHRASE, sshkeypassphrase);
        map.add(NodeUtils.PARAM_WINDOWSDOMAINNAME, windowsdomain);
        map.add(NodeUtils.PARAM_TYPE, getType().toString());

        // Now init any parameters that weren't passed into the command
        // using the values from the config
        initFromConfig(node);

        // Finally, anything that still isn't set, use the defaults.
        // These should likely come from config -- but they don't
        // as of now
        setDefaults();

        // validateMap holds the union of what the user passed and what was
        // in the config so we have all the settings needed to validate what
        // the node will look like after we update it.
        ParameterMap validateMap = new ParameterMap();
        validateMap.add(NodeUtils.PARAM_INSTALLDIR, installdir);
        validateMap.add(NodeUtils.PARAM_NODEHOST, nodehost);
        validateMap.add(NodeUtils.PARAM_NODEDIR, nodedir);
        validateMap.add(NodeUtils.PARAM_REMOTEPORT, remotePort);
        validateMap.add(NodeUtils.PARAM_REMOTEUSER, remoteUser);
        validateMap.add(NodeUtils.PARAM_SSHKEYFILE, sshkeyfile);
        validateMap.add(NodeUtils.PARAM_REMOTEPASSWORD, remotepassword);
        validateMap.add(NodeUtils.PARAM_SSHKEYPASSPHRASE, sshkeypassphrase);
        validateMap.add(NodeUtils.PARAM_WINDOWSDOMAINNAME, windowsdomain);
        validateMap.add(NodeUtils.PARAM_TYPE, getType().toString());

        // Validate the settings
        try {
            NodeUtils nodeUtils = new NodeUtils(habitat, logger);
            nodeUtils.validate(validateMap);
        } catch (CommandValidationException e) {
            String m1 = Strings.get("node.ssh.invalid.params");
            if (!force) {
                String m2 = Strings.get("update.node.ssh.not.updated");
                msg.append(StringUtils.cat(NL, m1, m2, e.getMessage()));
                report.setMessage(msg.toString());
                report.setActionExitCode(ActionReport.ExitCode.FAILURE);
                return;
            } else {
                String m2 = Strings.get("update.node.ssh.continue.force");
                msg.append(StringUtils.cat(NL, m1, e.getMessage(), m2));
            }
        }
        // Settings are valid. Now use the generic update-node command to
        // update the node.
        CommandInvocation ci = cr.getCommandInvocation("_update-node", report, context.getSubject());
        ci.parameters(map);
        ci.execute();

        if (StringUtils.ok(report.getMessage())) {
            if (msg.length() > 0) {
                msg.append(NL);
            }
            msg.append(report.getMessage());
        }

        report.setMessage(msg.toString());
    }

    /**
     * Initialize any parameters not provided by the user from the
     * configuration.
     */
    private void initFromConfig(Node node) {
        if (nodehost == null) {
            nodehost = node.getNodeHost();
        }

        if (installdir == null) {
            installdir = node.getInstallDir();
        }

        if (nodedir == null) {
            nodedir = node.getNodeDir();
        }

        if (windowsdomain == null) {
            windowsdomain = node.getWindowsDomain();

            if (windowsdomain == null) {
                windowsdomain = node.getNodeHost();
            }
        }

        SshConnector sshc = node.getSshConnector();
        if (sshc == null) {
            return;
        }

        if (remotePort == null) {
            remotePort = sshc.getSshPort();
        }

        SshAuth ssha = sshc.getSshAuth();
        if (ssha == null) {
            return;
        }

        if (remoteUser == null) {
            remoteUser = ssha.getUserName();
        }

        if (sshkeyfile == null) {
            sshkeyfile = ssha.getKeyfile();
        }

        if (remotepassword == null) {
            remotepassword = ssha.getPassword();
        }

        if (sshkeypassphrase == null) {
            sshkeypassphrase = ssha.getPassword();
        }
    }

   private void setDefaults() {
        if (!StringUtils.ok(remotePort)) {
            remotePort = getDefaultPort();
        }
        if (!StringUtils.ok(remoteUser)) {
            remoteUser = NodeUtils.NODE_DEFAULT_REMOTE_USER;
        }
        if (!StringUtils.ok(installdir)) {
            installdir = NodeUtils.NODE_DEFAULT_INSTALLDIR;
        }
    }
}