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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 *
 * 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).
 *
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 * 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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/*
 * @test
 * @bug 8295803 8299689 8361613 8366261
 * @summary Tests System.console() returns correct Console (or null) from the expected
 *          module.
 * @library /test/lib
 * @build jdk.test.lib.Utils
 *        jdk.test.lib.process.ProcessTools
 * @run junit ModuleSelectionTest
 */

import java.io.Console;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.stream.Stream;

import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import org.junit.jupiter.api.Assumptions;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;

import static jdk.test.lib.Utils.*;

public class ModuleSelectionTest {
    private static Stream<Arguments> options() {
        return Stream.of(
            Arguments.of("-Djdk.console=foo", "java.base"),
            Arguments.of("-Djdk.console=java.base", "java.base"),
            Arguments.of("-Djdk.console=jdk.internal.le", "jdk.internal.le"),
            Arguments.of("--limit-modules java.base", "java.base")
        );
    }

    @ParameterizedTest
    @MethodSource("options")
    void testNonTTY(String opts) throws Exception {
        opts = opts +
            " --add-opens java.base/java.io=ALL-UNNAMED ModuleSelectionTest null";
        OutputAnalyzer output = ProcessTools.executeTestJava(opts.split(" "));
        output.reportDiagnosticSummary();
        output.shouldHaveExitValue(0);
    }

    @ParameterizedTest
    @MethodSource("options")
    void testTTY(String opts, String expected) throws Exception {
        // check "expect" command availability
        var expect = Paths.get("/usr/bin/expect");
        Assumptions.assumeTrue(Files.exists(expect) && Files.isExecutable(expect),
            "'" + expect + "' not found. Test ignored.");

        opts = "expect -n " + TEST_SRC + "/moduleSelection.exp " +
            TEST_CLASSES + " " +
            expected + " " +
            TEST_JDK + "/bin/java" +
            " --add-opens java.base/java.io=ALL-UNNAMED "
            + opts;
        // invoking "expect" command
        OutputAnalyzer output = ProcessTools.executeProcess(opts.split(" "));
        output.reportDiagnosticSummary();
        output.shouldHaveExitValue(0);
    }

    public static void main(String... args) throws Throwable {
        var con = System.console();
        var pc = Class.forName("java.io.ProxyingConsole");
        var jdkc = Class.forName("jdk.internal.io.JdkConsole");
        var lookup = MethodHandles.privateLookupIn(Console.class, MethodHandles.lookup());
        var istty = (boolean)lookup.findStatic(Console.class, "isStdinTty", MethodType.methodType(boolean.class))
                        .invoke() &&
                   (boolean)lookup.findStatic(Console.class, "isStdoutTty", MethodType.methodType(boolean.class))
                        .invoke();

        var impl = con != null ? MethodHandles.privateLookupIn(pc, MethodHandles.lookup())
                .findGetter(pc, "delegate", jdkc)
                .invoke(con) : null;

        var expected = args[0];
        var actual = con == null ? "null" : impl.getClass().getModule().getName();

        if (!actual.equals(expected)) {
            throw new RuntimeException("""
                Console implementation is not the expected one.
                Expected: %s
                Actual: %s
                """.formatted(expected, actual));
        } else {
            System.out.printf("%s is the expected implementation. (tty: %s)\n", actual, istty);
        }
    }
}