/*

 *

 * This software is distributable under the BSD license. See the terms of the

 * BSD license in the documentation provided with this software.

 *

 * http://www.opensource.org/licenses/bsd-license.php

 */

package jdk.internal.jline.console.internal;

import jdk.internal.jline.console.ConsoleReader;

import jdk.internal.jline.console.completer.ArgumentCompleter;

import jdk.internal.jline.console.completer.Completer;

import jdk.internal.jline.console.history.FileHistory;

import jdk.internal.jline.internal.Configuration;

import java.io.File;

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.StringTokenizer;

// FIXME: Clean up API and move to jline.console.runner package

/**

 * A pass-through application that sets the system input stream to a

 * {@link ConsoleReader} and invokes the specified main method.

 *

 * @author <a href="mailto:mwp1@cornell.edu">Marc Prud'hommeaux</a>

 * @since 2.7

 */

public class ConsoleRunner

{

    public static final String property = "jline.history";

    // FIXME: This is really ugly... re-write this

    public static void main(final String[] args) throws Exception {

        List<String> argList = new ArrayList<String>(Arrays.asList(args));

        if (argList.size() == 0) {

            usage();

            return;

        }

        String historyFileName = System.getProperty(ConsoleRunner.property, null);

        String mainClass = argList.remove(0);

        ConsoleReader reader = new ConsoleReader();

        if (historyFileName != null) {

            reader.setHistory(new FileHistory(new File(Configuration.getUserHome(),

                String.format(".jline-%s.%s.history", mainClass, historyFileName))));

        }

        else {

            reader.setHistory(new FileHistory(new File(Configuration.getUserHome(),

                String.format(".jline-%s.history", mainClass))));

        }

        String completors = System.getProperty(ConsoleRunner.class.getName() + ".completers", "");

        List<Completer> completorList = new ArrayList<Completer>();

        for (StringTokenizer tok = new StringTokenizer(completors, ","); tok.hasMoreTokens();) {

            @SuppressWarnings("deprecation")

            Object obj = Class.forName(tok.nextToken()).newInstance();

            completorList.add((Completer) obj);

        }

        if (completorList.size() > 0) {

            reader.addCompleter(new ArgumentCompleter(completorList));

        }

        ConsoleReaderInputStream.setIn(reader);

        try {

            Class<?> type = Class.forName(mainClass);

            Method method = type.getMethod("main", String[].class);

        }

        finally {

            // just in case this main method is called from another program

            ConsoleReaderInputStream.restoreIn();

        }

    }

    private static void usage() {

        System.out.println("Usage: \n   java " + "[-Djline.history='name'] "

            + ConsoleRunner.class.getName()

            + " <target class name> [args]"

            + "\n\nThe -Djline.history option will avoid history"

            + "\nmangling when running ConsoleRunner on the same application."

            + "\n\nargs will be passed directly to the target class name.");

    }

}