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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * 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.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
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 *
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// Portions Copyright [2018-2020] [Payara Foundation and/or its affiliates]

package com.sun.enterprise.admin.cli.optional;

import com.sun.enterprise.admin.cli.*;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.glassfish.api.Param;
import org.glassfish.api.admin.*;

import static com.sun.enterprise.util.SystemPropertyConstants.*;

/**
 * This is an abstract class to be inherited by StartDatabaseCommand and
 * StopDatabaseCommand. This classes prepares the variables that are used to to
 * invoke DBControl. It also contains a pingDatabase method that is used by both
 * start/stop database command.
 *
 * @author Jane Young
 * @author Bill Shannon
 */
public abstract class DatabaseCommand extends CLICommand {

    private static final String DB_HOST_DEFAULT = "0.0.0.0";
    private static final String DB_PORT_DEFAULT = "9092";
    protected final static String DB_USER = "dbuser";


    @Param(name = "dbhost", optional = true, defaultValue = DB_HOST_DEFAULT)
    protected String dbHost;

    @Param(name = "dbport", optional = true)
    protected String dbPort;

    protected File dbLocation;
    protected File sJavaHome;
    protected File sInstallRoot;
    protected final ClassPathBuilder sClasspath = new ClassPathBuilder();
    protected final ClassPathBuilder sDatabaseClasspath = new ClassPathBuilder();

    private static final LocalStringsImpl strings
            = new LocalStringsImpl(DatabaseCommand.class);

    protected DBManager dbManager;
    
    /**
     * Prepare variables to invoke start/ping database command.
     */
    protected void prepareProcessExecutor() throws Exception {
        sInstallRoot = new File(getSystemProperty(INSTALL_ROOT_PROPERTY));

        if (dbHost == null) {
            dbHost = DB_HOST_DEFAULT;
        }
        if (dbPort == null) {
            dbPort = DB_PORT_DEFAULT;
        } else {
            checkIfPortIsValid(dbPort);
        }
        sJavaHome = new File(getSystemProperty(JAVA_ROOT_PROPERTY));
        dbManager = new H2Manager();
        dbLocation = new File(getSystemProperty(dbManager.getRootProperty()));
        try {
            dbManager.checkIfDbInstalled(dbLocation);
        } catch (CommandException ce) {
            logger.info(strings.get("DatabaseNotInstalled", dbLocation));
            throw ce;
        }
        sClasspath.add(new File(sInstallRoot, "lib/asadmin/cli-optional.jar"));
        dbManager.buildDatabaseClasspath(dbLocation, sDatabaseClasspath);
    }

    /**
     * Check if database port is valid. DB does not check this so need to add
     * code to check the port number.
     */
    private void checkIfPortIsValid(final String port)
            throws CommandValidationException {
        try {
            Integer.parseInt(port);
        } catch (NumberFormatException e) {
            throw new CommandValidationException(
                    strings.get("InvalidPortNumber", port));
        }
    }

    /**
     * Defines the command to ping the database.
     *
     * @param bRedirect
     * @return
     */
    protected String[] pingDatabaseCmd(boolean bRedirect) throws Exception {
        List cmd = new ArrayList<>();
        cmd.add(getJavaExe().toString());
        cmd.add("-Djava.library.path=" + sInstallRoot + File.separator + "lib");
        cmd.addAll(dbManager.getSystemProperty());
        cmd.add("-cp");
        cmd.add(sClasspath + File.pathSeparator + sDatabaseClasspath);
        cmd.add(dbManager.getDBControl().getName());
        cmd.add("ping");
        cmd.add(dbHost);
        cmd.add(dbPort);
        cmd.add(Boolean.toString(bRedirect));
        return cmd.toArray(new String[cmd.size()]);
    }

    /**
     * Computes the java executable location from {@link #sJavaHome}.
     *
     * @return
     */
    protected final File getJavaExe() {
        return new File(new File(sJavaHome, "bin"), "java");
    }
}