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import jdk.test.lib.cds.CDSOptions;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.Asserts;

// A helper/utility class for testing shared strings
public class SharedStringsUtils {
    public static final String TEST_JAR_NAME =      "test";
    public static final String TEST_JAR_NAME_FULL = "test.jar";
    public static final String WHITEBOX_JAR_NAME =  "whitebox";

    public static interface Test {
        public void dotest(String args[]) throws Exception ;
    }

    private static String[][] vmOptionCombos = {
        {},
        {"-XX:+UseStringDeduplication"},
        {"-XX:-CompactStrings"}
    };

    private static String childVMOptionsPrefix[] = {};

    // SharedStringsUtils.run() is for running the main test body multiple times, each with a different
    // set of extra VM options that are passed to the child processes.
    //
    // See ./ExerciseGC.java for an example.
    public static void run(String args[], Test t) throws Exception {
        int numSetOfChildVMOptions = vmOptionCombos.length;
        for (int i=0; i< numSetOfChildVMOptions; i++) {
            run(i, numSetOfChildVMOptions, args, t);
        }
    }

    public static void run(int i, int numSetOfChildVMOptions, String args[], Test t) throws Exception {
        // When you add a new set of options to vmOptionCombos, we make sure all
        // callers of this method (i.e., IncompatibleOptions.java) knows about it and will
        // add new @test blocks accordingly.
        Asserts.assertEQ(numSetOfChildVMOptions, vmOptionCombos.length);
        String opts[] = vmOptionCombos[i];

        System.out.print("Running with extra VM option prefix for child processes [" + opts.length + "] =");
        for (String o : opts) {
            System.out.print(" " + o);
        }
        System.out.println();
        childVMOptionsPrefix = opts;
        t.dotest(args);
    }

    public static String[] getChildVMOptionsPrefix() {
        return childVMOptionsPrefix;
    }

    public static String getWbParam() {
        return "-Xbootclasspath/a:" + TestCommon.getTestJar(WHITEBOX_JAR_NAME + ".jar");
    }

    // build the test jar
    public static void buildJar(String... classes) throws Exception {
        JarBuilder.build(TEST_JAR_NAME, classes);
    }

    // build the test jar and a whitebox jar
    public static void buildJarAndWhiteBox(String... classes) throws Exception {
        JarBuilder.build(true, WHITEBOX_JAR_NAME, "sun/hotspot/WhiteBox");
        buildJar(classes);
    }

    // execute the "dump" operation, but do not check the output
    public static OutputAnalyzer dumpWithoutChecks(String appClasses[],
        String sharedDataFile, String... extraOptions) throws Exception {

        String appJar = TestCommon.getTestJar(TEST_JAR_NAME_FULL);
        String[] args =
            TestCommon.concat(extraOptions, "-XX:+UseCompressedOops", "-XX:+UseG1GC",
            "-XX:SharedArchiveConfigFile=" +
            TestCommon.getSourceFile(sharedDataFile));
        args = TestCommon.concat(childVMOptionsPrefix, args);

        return TestCommon.dump(appJar, appClasses, args);
    }

    // execute the dump operation and check the output
    public static OutputAnalyzer dump(String appClasses[],
        String sharedDataFile, String... extraOptions) throws Exception {
        OutputAnalyzer output = dumpWithoutChecks(appClasses, sharedDataFile, extraOptions);
        checkDump(output);
        return output;
    }

    public static OutputAnalyzer dumpWithWhiteBox(String appClasses[],
        String sharedDataFile, String... extraOptions) throws Exception {
        return dump(appClasses, sharedDataFile,
            TestCommon.concat(extraOptions, getWbParam()) );
    }

    // execute/run test with shared archive
    public static OutputAnalyzer runWithArchiveAuto(String className,
        String... extraOptions) throws Exception {

        String appJar = TestCommon.getTestJar(TEST_JAR_NAME_FULL);
        String[] args = TestCommon.concat(extraOptions,
            "-cp", appJar, "-XX:+UseCompressedOops", "-XX:+UseG1GC", className);
        args = TestCommon.concat(childVMOptionsPrefix, args);

        OutputAnalyzer output = TestCommon.execAuto(args);
        checkExecAuto(output);
        return output;
    }

    public static OutputAnalyzer runWithArchive(String className,
        String... extraOptions) throws Exception {

        return runWithArchive(new String[0], className, extraOptions);
    }

    public static OutputAnalyzer runWithArchive(String[] extraMatches,
        String className, String... extraOptions) throws Exception {

        String appJar = TestCommon.getTestJar(TEST_JAR_NAME_FULL);
        String[] args = TestCommon.concat(extraOptions,
            "-XX:+UseCompressedOops", "-XX:+UseG1GC", className);
        args = TestCommon.concat(childVMOptionsPrefix, args);

        OutputAnalyzer output = TestCommon.exec(appJar, args);
        checkExec(output, extraMatches);
        return output;
    }


    // execute/run test with shared archive and white box
    public static OutputAnalyzer runWithArchiveAndWhiteBox(String className,
        String... extraOptions) throws Exception {

        return runWithArchive(className,
            TestCommon.concat(extraOptions, getWbParam(),
            "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI") );
    }

    public static OutputAnalyzer runWithArchiveAndWhiteBox(String[] extraMatches,
        String className, String... extraOptions) throws Exception {

        return runWithArchive(extraMatches, className,
            TestCommon.concat(extraOptions, getWbParam(),
            "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI") );
    }


    public static void checkDump(OutputAnalyzer output) throws Exception {
        output.shouldContain("Shared string table stats");
        TestCommon.checkDump(output);
    }

    public static void checkExec(OutputAnalyzer output) throws Exception {
        TestCommon.checkExec(output, new String[0]);
    }

    public static void checkExecAuto(OutputAnalyzer output) throws Exception {
        CDSOptions opts = (new CDSOptions()).setXShareMode("auto");
        TestCommon.checkExec(output, opts);
    }

    public static void checkExec(OutputAnalyzer output, String[] extraMatches) throws Exception {
        TestCommon.checkExec(output, extraMatches);
    }
}