/*
 * Copyright (c) 2007, 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.
 */

import jdk.test.lib.Platform;
import jdk.test.lib.Utils;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;

import java.io.File;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class SigTestDriver {
    public static void main(String[] args) {
        // No signal tests on Windows yet; so setting to no-op
        if (Platform.isWindows()) {
            System.out.println("SKIPPED: no signal tests on Windows, ignore.");
            return;
        }

        // At least one argument should be specified
        if ( (args == null) || (args.length < 1) ) {
            throw new IllegalArgumentException("At lease one argument should be specified, the signal name");
        }

        String signame = args[0];
        switch (signame) {
            case "SIGWAITING":
            case "SIGKILL":
            case "SIGSTOP": {
                System.out.println("SKIPPED: signals SIGWAITING, SIGKILL and SIGSTOP can't be tested, ignore.");
                return;
            }
            case "SIGUSR2": {
                if (Platform.isLinux()) {
                    System.out.println("SKIPPED: SIGUSR2 can't be tested on Linux, ignore.");
                    return;
                } else if (Platform.isOSX()) {
                    System.out.println("SKIPPED: SIGUSR2 can't be tested on OS X, ignore.");
                    return;
                }
            }
        }

        Path test = Paths.get(System.getProperty("test.nativepath"))
                         .resolve("sigtest")
                         .toAbsolutePath();
        String envVar = Platform.isWindows() ? "PATH" :
                (Platform.isOSX() ? "DYLD_LIBRARY_PATH" : "LD_LIBRARY_PATH");

        List<String> cmd = new ArrayList<>();
        Collections.addAll(cmd,
                test.toString(),
                "-sig",
                signame,
                "-mode",
                null, // modeIdx
                "-scenario",
                null // scenarioIdx
        );
        int modeIdx = 4;
        int scenarioIdx = 6;

        // add external flags
        cmd.addAll(vmargs());

        // add test specific arguments w/o signame
        cmd.addAll(Arrays.asList(args)
                         .subList(1, args.length));

        boolean passed = true;

        for (String mode : new String[]{"sigset", "sigaction"}) {
            for (String scenario : new String[] {"nojvm", "prepre", "prepost", "postpre", "postpost"}) {
                cmd.set(modeIdx, mode);
                cmd.set(scenarioIdx, scenario);
                System.out.printf("START TESTING: SIGNAL = %s, MODE = %s, SCENARIO=%s%n",signame, mode, scenario);
                System.out.printf("Do execute: %s%n", cmd.toString());

                ProcessBuilder pb = new ProcessBuilder(cmd);
                pb.environment().merge(envVar, jvmLibDir().toString(),
                        (x, y) -> y + File.pathSeparator + x);
                pb.environment().put("CLASSPATH", Utils.TEST_CLASS_PATH);

                switch (scenario) {
                    case "postpre":
                    case "postpost": {
                        pb.environment().merge("LD_PRELOAD", libjsig().toString(),
                                (x, y) -> y + File.pathSeparator + x);
                    }
                }

                try {
                    OutputAnalyzer oa = ProcessTools.executeProcess(pb);
                    oa.reportDiagnosticSummary();
                    int exitCode = oa.getExitValue();
                    if (exitCode == 0) {
                       System.out.println("PASSED with exit code 0");
                    } else {
                        System.out.println("FAILED with exit code " + exitCode);
                        passed = false;
                    }
                } catch (Exception e) {
                    throw new Error("execution failed", e);
                }
            }
        }

        if (!passed) {
            throw new Error("test failed");
        }
    }

    private static List<String> vmargs() {
        return Stream.concat(Arrays.stream(Utils.VM_OPTIONS.split(" ")),
                             Arrays.stream(Utils.JAVA_OPTIONS.split(" ")))
                     .filter(s -> !s.isEmpty())
                     .filter(s -> s.startsWith("-X"))
                     .flatMap(arg -> Stream.of("-vmopt", arg))
                     .collect(Collectors.toList());
    }

    private static Path libjsig() {
        return jvmLibDir().resolve((Platform.isWindows() ? "" : "lib")
                + "jsig." + Platform.sharedLibraryExt());
    }

    private static Path jvmLibDir() {
        Path dir = Paths.get(Utils.TEST_JDK);
        if (Platform.isWindows()) {
            return dir.resolve("bin")
                      .resolve(variant())
                      .toAbsolutePath();
        } else {
            return dir.resolve("lib")
                      .resolve(variant())
                      .toAbsolutePath();
        }
    }

    private static String variant() {
        if (Platform.isServer()) {
            return "server";
        } else if (Platform.isClient()) {
            return "client";
        } else if (Platform.isMinimal()) {
            return "minimal";
        } else {
            throw new Error("TESTBUG: unsupported vm variant");
        }
    }
}