/*

 * 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.

 *

 * 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.

 */

import java.io.IOException;

import java.net.URI;

import java.nio.file.FileSystem;

import java.nio.file.FileSystems;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Collections;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.function.Predicate;

import java.util.stream.Collectors;

import java.util.stream.Stream;

import jdk.tools.jlink.internal.StringTable;

import jdk.tools.jlink.internal.plugins.asm.AsmPlugin;

import jdk.tools.jlink.internal.plugins.asm.AsmPools;

public abstract class AsmPluginTestBase {

    protected static final String TEST_MODULE = "jlink.test";

    protected static final Map<String, List<String>> MODULES;

    private final List<String> classes;

    private final List<String> resources;

    static {

        Map<String, List<String>> map = new HashMap<>();

        map.put("jdk.localedata", new ArrayList<>());

        map.put("java.base", new ArrayList<>());

        map.put(TEST_MODULE, new ArrayList<>());

        MODULES = Collections.unmodifiableMap(map);

    }

    public static boolean isImageBuild() {

        Path javaHome = Paths.get(System.getProperty("test.jdk"));

        Path jmods = javaHome.resolve("jmods");

        return Files.exists(jmods);

    }

    public AsmPluginTestBase() {

        try {

            List<String> classes = new ArrayList<>();

            List<String> resources = new ArrayList<>();

            FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));

            Path root = fs.getPath("/modules");

            List<byte[]> moduleInfos = new ArrayList<>();

            try (Stream<Path> stream = Files.walk(root)) {

                for (Iterator<Path> iterator = stream.iterator(); iterator.hasNext(); ) {

                    Path p = iterator.next();

                    if (Files.isRegularFile(p)) {

                        String module = p.toString().substring("/modules/".length());

                        module = module.substring(0, module.indexOf("/"));

                        if (MODULES.keySet().contains(module)) {

                            try {

                                boolean isModuleInfo = p.endsWith("module-info.class");

                                if (isModuleInfo) {

                                    moduleInfos.add(Files.readAllBytes(p));

                                }

                                byte[] content = Files.readAllBytes(p);

                                if (p.toString().endsWith(".class") && !isModuleInfo) {

                                    classes.add(toClassName(p));

                                } else if (!isModuleInfo) {

                                    MODULES.get(module).add(toResourceFile(p));

                                }

                                resources.add(toPath(p.toString()));

                                pool.add(res);

                            } catch (Exception ex) {

                                throw new RuntimeException(ex);

                            }

                        }

                    }

                }

            }

            // There is more than 10 classes in java.base...

                throw new AssertionError("Not expected resource or class number");

            }

            //Add a fake resource file

            String content = "java.lang.Object";

            String path = "META-INF/services/com.foo.BarProvider";

                    path, content.getBytes());

            pool.add(resFile);

                    + "/module-info.class", moduleInfos.get(0));

            pool.add(fakeInfoFile);

            MODULES.get(TEST_MODULE).add(path);

            for(Map.Entry<String, List<String>> entry : MODULES.entrySet()) {

                if (entry.getValue().isEmpty()) {

                    throw new AssertionError("No resource file for " + entry.getKey());

                }

            }

            this.classes = Collections.unmodifiableList(classes);

            this.resources = Collections.unmodifiableList(resources);

        } catch (Exception e) {

            throw new ExceptionInInitializerError(e);

        }

    }

    public List<String> getClasses() {

        return classes;

    }

    public List<String> getResources() {

        return resources;

    }

        return pool;

    }

    public abstract void test() throws Exception;

                .filter(isClass)

                .collect(Collectors.toSet());

    }

                .filter(isClass.negate())

                .collect(Collectors.toSet());

    }

    public String getModule(String path) {

        int index = path.indexOf("/", 1);

        return path.substring(1, index);

    }

    public String removeModule(String path) {

        int index = path.indexOf("/", 1);

        return path.substring(index + 1);

    }

    private String toPath(String p) {

        return p.substring("/modules".length());

    }

    private String toClassName(Path p) {

        String path = p.toString();

        path = path.substring("/modules/".length());

        // remove module

        if (!path.endsWith("module-info.class")) {

            path = path.substring(path.indexOf("/") + 1);

        }

        path = path.substring(0, path.length() - ".class".length());

        return path;

    }

    private String toResourceFile(Path p) {

        String path = p.toString();

        path = path.substring("/modules/".length());

        // remove module

        path = path.substring(path.indexOf("/") + 1);

        return path;

    }

    public abstract class TestPlugin extends AsmPlugin {

        private AsmPools pools;

        public AsmPools getPools() {

            return pools;

        }

        public boolean isVisitCalled() {

            return pools != null;

        }

            try {

                    @Override

                    public int addString(String str) {

                        return -1;

                    }

                    @Override

                    public String getString(int id) {

                        return null;

                    }

                });

                visit(inResources, outResources);

                return outResources;

            } catch (Exception e) {

                throw new IOException(e);

            }

        }

        @Override

        public void visit(AsmPools pools) {

            if (isVisitCalled()) {

                throw new AssertionError("Visit was called twice");

            }

            this.pools = pools;

            visit();

        }

        public abstract void visit();

        @Override

        public String getName() {

            return "test-plugin";

        }

    }

}