/*

 * Copyright (c) 2017, 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

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package org.graalvm.compiler.core.test;

import java.io.File;

import java.io.IOException;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.Comparator;

import org.graalvm.compiler.printer.GraalDebugHandlersFactory;

import org.graalvm.compiler.test.AddExports;

import org.junit.Test;

@AddExports("jdk.internal.vm.compiler/org.graalvm.compiler.printer")

public class GraalDebugHandlersFactoryTest extends GraalCompilerTest {

    @Test

    public void createUniqueTest() throws Exception {

        Field maxFileNameLengthField = GraalDebugHandlersFactory.class.getDeclaredField("MAX_FILE_NAME_LENGTH");

        maxFileNameLengthField.setAccessible(true);

        int maxFileNameLength = maxFileNameLengthField.getInt(null);

        Method createUniqueMethod = GraalDebugHandlersFactory.class.getDeclaredMethod("createUnique", Path.class, String.class, String.class, String.class, boolean.class);

        createUniqueMethod.setAccessible(true);

        Path tmpDir = Files.createTempDirectory(Paths.get("."), "createUniqueTest");

        try {

            for (boolean createDirectory : new boolean[]{true, false}) {

                for (String ext : new String[]{"", ".bgv", ".graph-strings"}) {

                    for (int i = 0; i < maxFileNameLength + 5; i++) {

                        String id = new String(new char[i]).replace('\0', 'i');

                        String label = "";

                        createUniqueMethod.invoke(null, tmpDir, id, label, ext, createDirectory);

                        id = "";

                        label = new String(new char[i]).replace('\0', 'l');

                        createUniqueMethod.invoke(null, tmpDir, id, label, ext, createDirectory);

                    }

                }

            }

        } finally {

            deleteTree(tmpDir);

        }

    }

    private static void deleteTree(Path root) throws IOException {

        Files.walk(root).sorted(Comparator.reverseOrder()).map(Path::toFile).forEach(File::delete);

    }

}