/*

 * Copyright (c) 2017, 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

 * questions.

 */

package org.graalvm.compiler.core.test;

import java.io.IOException;

import java.nio.file.DirectoryStream;

import java.nio.file.Files;

import java.nio.file.Path;

import jdk.internal.vm.compiler.collections.EconomicMap;

import org.graalvm.compiler.debug.DebugOptions;

import org.graalvm.compiler.options.OptionKey;

import org.graalvm.compiler.options.OptionValues;

import org.junit.Test;

/**

 * Check that setting the dump path results in files ending up in the right directory with matching

 * names.

 */

public class DumpPathTest extends GraalCompilerTest {

    public static Object snippet() {

        return new String("snippet");

    }

    @Test

    public void testDump() throws IOException {

        assumeManagementLibraryIsLoadable();

        Path dumpDirectoryPath = Files.createTempDirectory("DumpPathTest");

        String[] extensions = new String[]{".cfg", ".bgv", ".graph-strings"};

        EconomicMap<OptionKey<?>, Object> overrides = OptionValues.newOptionMap();

        overrides.put(DebugOptions.DumpPath, dumpDirectoryPath.toString());

        overrides.put(DebugOptions.PrintCanonicalGraphStrings, true);

        overrides.put(DebugOptions.Dump, "*");

        // Generate dump files.

        test(new OptionValues(getInitialOptions(), overrides), "snippet");

        // Check that Ideal files got created, in the right place.

        checkForFiles(dumpDirectoryPath, extensions);

        // Clean up the generated files.

        scrubDirectory(dumpDirectoryPath);

    }

    /**

     * Check that the given directory contains file or directory names with all the given

     * extensions.

     */

    private static void checkForFiles(Path directoryPath, String[] extensions) throws IOException {

        String[] paths = new String[extensions.length];

        try (DirectoryStream<Path> stream = Files.newDirectoryStream(directoryPath)) {

            for (Path filePath : stream) {

                String fileName = filePath.getFileName().toString();

                for (int i = 0; i < extensions.length; i++) {

                    String extension = extensions[i];

                    if (fileName.endsWith(extensions[i])) {

                        assertTrue(paths[i] == null, "multiple files found for %s in %s", extension, directoryPath);

                        paths[i] = fileName.replace(extensions[i], "");

                    }

                }

            }

        }

        for (int i = 0; i < paths.length; i++) {

            assertTrue(paths[i] != null, "missing file for extension %s in %s", extensions[i], directoryPath);

        }

        // Ensure that all file names are the same.

        for (int i = 1; i < paths.length; i++) {

            assertTrue(paths[0].equals(paths[i]), paths[0] + " != " + paths[i]);

        }

    }

    /**

     * Remove the temporary directory.

     */

    private static void scrubDirectory(Path directoryPath) {

        try {

            try (DirectoryStream<Path> stream = Files.newDirectoryStream(directoryPath)) {

                for (Path filePath : stream) {

                    if (Files.isRegularFile(filePath)) {

                        Files.delete(filePath);

                    } else if (Files.isDirectory(filePath)) {

                        scrubDirectory(filePath);

                    }

                }

            }

            Files.delete(directoryPath);

        } catch (IOException ioe) {

            ioe.printStackTrace();

        }

    }

}