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/*
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 *
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 *
 * The contents of this file are subject to the terms of either the GNU
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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
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 */

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

import java.io.File;
import java.io.FileFilter;
import org.glassfish.api.Param;
import org.glassfish.api.admin.*;
import com.sun.enterprise.admin.cli.*;
import static com.sun.enterprise.util.SystemPropertyConstants.*;
import com.sun.enterprise.util.OS;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;

/**
 *  This is an abstract class to be inherited by
 *  StartDatabaseCommand and StopDatabaseCommand.
 *  This classes prepares the variables that are used to
 *  to invoke DerbyControl.  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 {
    protected static final String DB_HOST_DEFAULT = "0.0.0.0";
    protected static final String DB_PORT_DEFAULT = "1527";
    protected final static String DB_USER       = "dbuser";
    //protected final static String DB_PASSWORD   = "dbpassword";
    protected final static String DB_PASSWORDFILE   = "dbpasswordfile";

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

    @Param(name = "dbport", optional = true, defaultValue = DB_PORT_DEFAULT)
    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);

    /**
     * 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));
        dbLocation = new File(getSystemProperty(DERBY_ROOT_PROPERTY));
        checkIfDbInstalled(dbLocation);
        
	sClasspath.add(new File(sInstallRoot, "lib/asadmin/cli-optional.jar"));
        sDatabaseClasspath
                .add(dbLocation,"lib","derby.jar")
                .add(dbLocation,"lib","derbytools.jar")
                .add(dbLocation,"lib","derbynet.jar")
                .add(dbLocation,"lib","derbyclient.jar");
    }


    /**
     * Check if database port is valid.
     * Derby 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));
        }
    }
    
    /**
     * Check if database is installed.
     */
    private void checkIfDbInstalled(final File dblocation)
            throws CommandException {
        if (!dblocation.exists()) {
            logger.info(strings.get("DatabaseNotInstalled",
                                                     dblocation));
            throw new CommandException("dblocation not found: " + dblocation);
        } else {
            File derbyJar =
                new File(new File(dbLocation, "lib"), "derbyclient.jar");
            if (!derbyJar.exists()) {
                logger.info(strings.get("DatabaseNotInstalled",
                                                     dblocation));
                throw new CommandException(
                    "derbyclient.jar not found in " + dblocation);
            }
        }
    }

    /**
     * Defines the command to ping the derby database.
     * Note that when using Darwin (Mac), the property,
     * "-Dderby.storage.fileSyncTransactionLog=True" is defined.
     * See:
     * http://www.jasonbrome.com/blog/archives/2004/12/05/apache_derby_on_mac_os_x.html
     * https://issues.apache.org/jira/browse/DERBY-1
     */
    protected String[] pingDatabaseCmd(boolean bRedirect) throws Exception {
        if (OS.isDarwin()) {
            return new String[]{getJavaExe().toString(),
                    "-Djava.library.path=" + sInstallRoot + File.separator +
                    "lib", "-Dderby.storage.fileSyncTransactionLog=True", "-cp",
                    sClasspath + File.pathSeparator + sDatabaseClasspath,
                    "com.sun.enterprise.admin.cli.optional.DerbyControl", "ping",
                    dbHost, dbPort, Boolean.valueOf(bRedirect).toString()};
        } else {
            return new String[]{getJavaExe().toString(),
                    "-Djava.library.path=" + sInstallRoot + File.separator +
                    "lib", "-cp",
                    sClasspath + File.pathSeparator + sDatabaseClasspath,
                    "com.sun.enterprise.admin.cli.optional.DerbyControl", "ping",
                    dbHost, dbPort, Boolean.valueOf(bRedirect).toString()};
        }
    }

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