/*
 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.oracle.tools.packager;

//import com.oracle.tools.packager.Log;
//import com.oracle.tools.packager.RelativeFileSet;
//import com.oracle.tools.packager.StandardBundlerParam;
import com.sun.tools.jdeps.Main;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.file.Path;
//import java.lang.reflect.InvocationTargetException;
//import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
//import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
//import java.util.logging.Level;
//import java.util.logging.Logger;
import java.util.stream.Collectors;


public final class JDepHelper {
    private JDepHelper() {}

//    private static Method getJdepMain() {
//        Method result = null;
//
//        try {
//            Class<?> jdepsClass = Class.forName("com.sun.tools.jdeps.Main");
//
//            // langtools/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/Main.java
//            // public static int run(String[] args, PrintWriter out)
//            try {
//                result = jdepsClass.getMethod("run", String[].class, PrintWriter.class);
//            } catch (NoSuchMethodException e) {
//            }
//        } catch (ClassNotFoundException e) {
//        }
//
//        return result;
//    }

    private static int invokeJdep(String[] args, PrintWriter out) {
        return com.sun.tools.jdeps.Main.run(args, out);
//        int result = 0;
//
//        Method jdep = getJdepMain();
//
//        try {
//            result = (Integer)jdep.invoke(args, out);
//        } catch (IllegalAccessException ex) {
//            Logger.getLogger(JDepHelper.class.getName()).log(Level.SEVERE, null, ex);
//        } catch (IllegalArgumentException ex) {
//            Logger.getLogger(JDepHelper.class.getName()).log(Level.SEVERE, null, ex);
//        } catch (InvocationTargetException ex) {
//            Logger.getLogger(JDepHelper.class.getName()).log(Level.SEVERE, null, ex);
//        }
//
//        return result;
    }

    public static List<String> getResourceFileJarList(Map<String, ? super Object> params) {
        List<String> files = new ArrayList();

        for (RelativeFileSet rfs : StandardBundlerParam.APP_RESOURCES_LIST.fetchFrom(params)) {
            for (String s : rfs.files) {
                if (s.endsWith(".jar")) {
                    files.add(rfs.getBaseDirectory() + File.separator + s);
                }
            }
        }

        return files;
    }

    public static Set<String> calculateModules(List<String> Files, List<Path> modulePath) {
        try (ByteArrayOutputStream baos = new ByteArrayOutputStream();
             PrintWriter writer = new PrintWriter(baos)) {

            List<String> arguments = new ArrayList<>();
            arguments.add("-s");
            //TODO JDK-8148654 - add support for -modulepath.
            //if (modulePath != null || !modulePath.empty()) {
            //    arguments.add("-modulepath");
            //    ...
            //}
            arguments.addAll(Files);

            invokeJdep(arguments.toArray(new String[arguments.size()]), writer);

            // output format is multiple lines of "this.jar -> that.module.name"
            // we only care about what is to the right of the arrow
            return Arrays.stream(baos.toString().split("\\s*\\S+\\s+->\\s+"))
                    .map(String::trim)
                    .filter(s -> !s.isEmpty() && !arguments.contains(s) && !"not found".equals(s))
                    .collect(Collectors.toSet());
        } catch (IOException ioe) {
            Log.verbose(ioe);
            return new LinkedHashSet();
        }
    }
}