/*

 * Copyright (c) 2018, 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

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 */

import java.io.BufferedInputStream;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.util.Set;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import java.util.zip.ZipEntry;

import java.util.zip.ZipInputStream;

/**

 * @test

 * @requires release.implementor == "Oracle Corporation"

 * @modules jdk.jlink/jdk.tools.jimage

 * @summary Oracle builds of OpenJDK should only contain english, chinese and

 *          japanese translations

 */

public class VerifyTranslations {

    /**

     * The set of translations we want to see in an Oracle built image

     */

    private static final Set<String> VALID_TRANSLATION_SUFFIXES = Set.of(

            "_en", "_en_US", "_en_US_POSIX", "_ja", "_zh_CN"

    );

    /**

     * This regexp will not match locales with 3 letter lang strings because

     * doing so would trigger a ton of false positives all over the source

     * tree. This is ok for now but is a potential future flaw in the test.

     */

    private static final String BASE_LOCALE_REGEXP

            = "(_[a-z]{2}(_[A-Z][a-z]{3})?(_([A-Z]{2})|([0-9]{3}))?(_[a-zA-Z]+)?)";

    public static void main(String[] args) {

        String jdkPath = System.getProperty("test.jdk");

        String modulesFile = jdkPath + "/lib/modules";

        // Run jimage tool to extract list of all classes and resources in the jdk

        StringWriter output = new StringWriter();

        jdk.tools.jimage.Main.run(new String[] { "list", modulesFile }, new PrintWriter(output));

        Pattern classesLocalePattern = Pattern.compile(BASE_LOCALE_REGEXP + "\\.(class|properties)");

        boolean failed = false;

        String module = "";

        for (String line : output.toString().split("\n")) {

            if (line.startsWith("Module: ")) {

                module = line.substring(8).trim();

            }

            // We do not filter resources in jdk.localedata

            if (!module.equals("jdk.localedata")) {

                Matcher matcher = classesLocalePattern.matcher(line);

                if (matcher.find()) {

                    if (!VALID_TRANSLATION_SUFFIXES.contains(matcher.group(1))) {

                        System.out.println("Unsupported translation found in lib/modules: "

                                + module + "/" + line.trim());

                        failed = true;

                    }

                }

            }

        }

        // Check all files in src.zip

        Pattern sourceLocalePattern = Pattern.compile(BASE_LOCALE_REGEXP + "\\.java");

        String srcZip = jdkPath + "/lib/src.zip";

        try (ZipInputStream srcZipInput = new ZipInputStream(

                new BufferedInputStream(new FileInputStream(srcZip)))) {

            ZipEntry entry;

            while ((entry = srcZipInput.getNextEntry()) != null) {

                String name = entry.getName();

                if (!name.startsWith("jdk.localedata")) {

                    Matcher matcher = sourceLocalePattern.matcher(name);

                    if (matcher.find()) {

                        if (!VALID_TRANSLATION_SUFFIXES.contains(matcher.group(1))) {

                            System.out.println("Unsupported translation found in lib/src.zip: " + name);

                            failed = true;

                        }

                    }

                }

            }

        } catch (IOException e) {

            throw new RuntimeException(e);

        }

        if (failed) {

            throw new RuntimeException("lib/modules contains unsupported translations");

        }

    }

}