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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.
 *
 * GPL Classpath Exception:
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 *
 * Modifications:
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// Portions Copyright [2018] [Payara Foundation and/or its affiliates]

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

import com.sun.enterprise.admin.cli.CLIProcessExecutor;
import com.sun.enterprise.universal.glassfish.GFLauncherUtils;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.glassfish.api.Param;
import org.glassfish.api.admin.CommandException;
import org.glassfish.api.admin.CommandValidationException;
import org.glassfish.hk2.api.PerLookup;
import org.jvnet.hk2.annotations.Service;

/**
 * start-database command This command class will invoke DBControl to first ping
 * if the database is running. If not then it will start the database. If the
 * database is already started, then a message will be displayed to the user.
 *
 * @author Jane Young
 * @author Bill Shannon
 */
@Service(name = "start-database")
@PerLookup
public final class StartDatabaseCommand extends DatabaseCommand {

    private final static String DATABASE_DIR_NAME = "databases";

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

    @Param(name = "jvmoptions", optional = true, separator = ' ')
    private String[] jvmoptions;

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

    /**
     * Defines the command to start the database
     *
     * @return
     */
    public String[] startDatabaseCmd() {
        ArrayList cmd = new ArrayList<>();
        cmd.add(sJavaHome + File.separator + "bin" + File.separator + "java");
        cmd.add("-Djava.library.path=" + sInstallRoot + File.separator + "lib");
        cmd.addAll(dbManager.getSystemProperty());
        cmd.add("-cp");
        cmd.add(sClasspath + File.pathSeparator + sDatabaseClasspath);
        if (jvmoptions != null) {
            cmd.addAll(Arrays.asList(jvmoptions));
        }
        cmd.add(dbManager.getDBControl().getName());
        cmd.add("start");
        cmd.add(dbHost);
        cmd.add(dbPort);
        cmd.add("true");
        cmd.add(dbHome);
        return cmd.toArray(new String[cmd.size()]);
    }

    /**
     * Defines the command to print out the database sysinfo
     *
     * @return
     */
    public String[] sysinfoCmd() throws Exception {
        List cmd = new ArrayList<>();
        cmd.add(sJavaHome + File.separator + "bin" + File.separator + "java");
        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("sysinfo");
        cmd.add(dbHost);
        cmd.add(dbPort);
        cmd.add("false");
        return cmd.toArray(new String[cmd.size()]);
    }

    /**
     * This method returns dbhome. If dbhome option is specified, then the
     * option value is returned. If not, then go through series of conditions to
     * determine the default dbhome directory. The conditions are as follow: 1.
     * if ${dbType}.log exists in the current directory, then that is the
     * default dbhome directory. 2. if ${dbType}.log does not exist in the
     * current directory, then create a "databases" in
     * . This is usually  in filebased
     * installation. In package based installation this directory is
     * /var/SUNWappserver.
     */
    private String getDatabaseHomeDir() {
        // dbhome is specified then return the dbhome option value
        if (dbHome != null) {
            return dbHome;
        }

        // Check if current directory contains ${dbType}.log
        // for now we are going to rely on ${dbType}.log file to ascertain
        // whether the current directory is where databases were created.
        // However, this may not always be right.
        // The reason for this behavior is so that it is
        // compatible with 8.2PE and 9.0 release.
        // In 8.2PE and 9.0, the current directory is the
        // default dbhome.
        final String currentDir = System.getProperty("user.dir");
        if ((new File(currentDir, dbManager.getLogFileName())).exists()) {
            return currentDir;
        }
        // The default dbhome is /databases
        final File installPath = GFLauncherUtils.getInstallDir();

        if (installPath != null) {
            final File dbDir = new File(installPath, DATABASE_DIR_NAME);
            if (!dbDir.isDirectory() && !dbDir.mkdir()) {
                logger.warning(strings.get("CantCreateDatabaseDir", dbDir));
            }
            try {
                return dbDir.getCanonicalPath();
            } catch (IOException ioe) {
                // if unable to get canonical path, then return absolute path
                return dbDir.getAbsolutePath();
            }
        }
        // hopefully it'll never get here. if installPath is null then
        // asenv.conf is incorrect.
        return null;
    }

    /**
     * Execute the command
     *
     * @throws CommandException
     */
    @Override
    protected int executeCommand() throws CommandException, CommandValidationException {
        final CLIProcessExecutor cpe = new CLIProcessExecutor();
        String dbLog = "";
        int exitCode = 0;
        try {
            prepareProcessExecutor();
            dbHome = getDatabaseHomeDir();
            if (dbHome != null) {
                dbLog = dbHome + File.separator + dbManager.getLogFileName();
            }
            logger.finer("Ping Database");
            cpe.execute("pingDatabaseCmd", pingDatabaseCmd(true), true);
            // if ping is unsuccesfull then database is not up and running
            if (cpe.exitValue() > 0) {
                logger.finer("Start Database");
                cpe.execute("startDatabaseCmd", startDatabaseCmd(), false);
                if (cpe.exitValue() != 0) {
                    throw new CommandException(strings.get("UnableToStartDatabase", dbLog));
                }
            } else if (cpe.exitValue() < 0) {
                // Something terribly wrong!
                throw new CommandException(strings.get("CommandUnSuccessful", name));
            } else {
                // Database already started
                logger.info(strings.get("StartDatabaseStatus", dbHost, dbPort));
            }
        } catch (IllegalThreadStateException ite) {
            // IllegalThreadStateException is thrown if the 
            // process has not yet teminated and is still running.
            // see http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Process.html#exitValue()
            // This is good since that means the database is up and running.
            CLIProcessExecutor cpePing = new CLIProcessExecutor();
            CLIProcessExecutor cpeSysInfo = new CLIProcessExecutor();
            try {
                if (!programOpts.isTerse()) {
                    // try getting sysinfo
                    logger.fine(strings.get("database.info.msg", dbHost, dbPort));
                }
                cpePing.execute("pingDatabaseCmd", pingDatabaseCmd(true), true);
                int counter = 0;
                // Give time for the database to be started
                while (cpePing.exitValue() != 0 && counter < 10) {
                    cpePing.execute("pingDatabaseCmd", pingDatabaseCmd(true), true);
                    Thread.sleep(500);
                    counter++;
                    //break out if start-database failed
                    try {
                        cpe.exitValue();
                        break;
                    } catch (IllegalThreadStateException itse) {
                        continue;
                    }
                }
                if (!programOpts.isTerse()) {
                    logger.finer("Database SysInfo");
                    if (cpePing.exitValue() == 0) {
                        cpeSysInfo.execute("sysinfoCmd", sysinfoCmd(), true);
                        if (cpeSysInfo.exitValue() != 0) {
                            logger.info(strings.get("CouldNotGetSysInfo"));
                        }
                    }
                }
            } catch (Exception e) {
                throw new CommandException(strings.get("CommandUnSuccessful", name), e);
            }
            if (cpePing.exitValue() == 0) {
                logger.info(strings.get("DatabaseStartMsg"));
                if ((new File(dbLog)).canWrite()) {
                    logger.info(strings.get("LogRedirectedTo", dbLog));
                }
            } else {
                throw new CommandException(strings.get("UnableToStartDatabase", dbLog));
            }
        } catch (CommandException ce) {
            throw ce;
        } catch (Exception e) {
            throw new CommandException(strings.get("CommandUnSuccessful", name), e);
        }
        return exitCode;
    }
}