/*

 * Copyright (c) 2016, 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.util.Arrays;

import java.util.Locale;

import java.util.Set;

import java.util.TreeSet;

import java.util.stream.Collectors;

class GetAvailableLocales {

    public static void main(String[] args) {

        Set<String> expected = Set.of(args);

        Set<String> actual =

            Arrays.stream(Locale.getAvailableLocales())

                  // "(root)" for Locale.ROOT rather than ""

                  .map(loc -> loc.equals(Locale.ROOT) ? "(root)" : loc.toString())

                  .collect(Collectors.toSet());

        if (!expected.equals(actual)) {

            diff(expected, actual);

            System.exit(1);

        }

    }

    private static void diff(Set<String> expected, Set<String> actual) {

        Set<String> s1 = new TreeSet<>(expected);

        s1.removeAll(actual);

        if (!s1.isEmpty()) {

            System.out.println("\tMissing locale(s): " + s1);

        }

        Set<String> s2 = new TreeSet<>(actual);

        s2.removeAll(expected);

        if (!s2.isEmpty()) {

            System.out.println("\tExtra locale(s): " + s2);

        }

    }

}