/*
 * Copyright (c) 2022, 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.
 *
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 */

import jdk.test.lib.Utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import static org.testng.Assert.assertNotEquals;
import static org.testng.Assert.assertTrue;

public class UpcallTestHelper extends NativeTestHelper {
    public record Output(List<String> stdout, List<String> stderr) {
        private static void assertContains(List<String> lines, String shouldInclude) {
            assertTrue(lines.stream().anyMatch(line -> line.contains(shouldInclude)),
                "Did not find '" + shouldInclude + "' in stderr");
        }

        public void assertStdErrContains(String shouldInclude) {
            assertContains(stderr, shouldInclude);
        }
    }

    public Output runInNewProcess(Class<?> target, boolean useSpec, String... programArgs) throws IOException, InterruptedException {
        assert !target.isArray();

        List<String> command = new ArrayList<>(List.of(
            Paths.get(Utils.TEST_JDK)
                    .resolve("bin")
                    .resolve("java")
                    .toAbsolutePath()
                    .toString(),
            "--enable-preview",
            "--enable-native-access=ALL-UNNAMED",
            "-Djava.library.path=" + System.getProperty("java.library.path"),
            "-Djdk.internal.foreign.ProgrammableUpcallHandler.USE_SPEC=" + useSpec,
            "-cp", Utils.TEST_CLASS_PATH,
            target.getName()
        ));
        command.addAll(Arrays.asList(programArgs));
        Process process = new ProcessBuilder()
            .command(command)
            .start();

        int result = process.waitFor();
        assertNotEquals(result, 0);

        List<String> outLines = linesFromStream(process.getInputStream());
        outLines.forEach(System.out::println);
        List<String> errLines = linesFromStream(process.getErrorStream());
        errLines.forEach(System.err::println);

        return new Output(outLines, errLines);
    }

    private static List<String> linesFromStream(InputStream stream) throws IOException {
        try (BufferedReader reader = new BufferedReader(new InputStreamReader(stream))) {
            return reader.lines().toList();
        }
    }
}