/*
 * Copyright (c) 2017, 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.
 */

/*
 * @test
 * @run main/othervm -Xint -Xverify:none -XX:+EnableMVT -XX:+ValueArrayFlatten MVTAccessCheck
 * @run main/othervm -Xint -Xverify:none -XX:+EnableMVT -XX:-ValueArrayFlatten MVTAccessCheck
 * @run main/othervm -Xint -Xverify:none -XX:+EnableMVT -Dvalhalla.enableValueLambdaForms=true MVTAccessCheck
 * @run main/othervm -Xint -Xverify:none -XX:+EnableMVT -Dvalhalla.enableValueLambdaForms=true -Dvalhalla.enablePoolPatches=true MVTAccessCheck
 */

import jdk.experimental.value.ValueType;

import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;

public class MVTAccessCheck {

    public static void main(String[] args) throws Throwable {
        MethodHandles.Lookup lookup = MethodHandles.lookup();
        Class<?> VCC = PrivatePoint.class;
        ValueType<?> VT = ValueType.forClass(VCC);
        String[] fieldNames = {"x", "y", "z"};
        Class<?>[] fieldTypes = {int.class, short.class, short.class};

        for (int i = 0; i < fieldNames.length; i++) {
            final int offset = i;
            assertThrow(() -> VT.findGetter(lookup, fieldNames[offset], fieldTypes[offset]),IllegalAccessException.class);
        }

        for (int i = 0; i < fieldNames.length; i++) {
            final int offset = i;
            assertThrow(() -> VT.findWither(lookup, fieldNames[offset], fieldTypes[offset]), IllegalAccessException.class);
        }

        PrivatePoint[] pts = {new PrivatePoint(1, (short) 6, (short) 3), new PrivatePoint(1, (short) 2, (short) 3)};

        MethodHandle substTest = VT.substitutabilityTest();
        for (PrivatePoint p1 : pts) {
            for (PrivatePoint p2 : pts) {
                boolean b1 = (boolean) substTest.invoke(p1, p2);
                boolean b2 = p1.equals(p2);
                assertTrue(b1 == b2);
            }
        }

        MethodHandle hash = VT.substitutabilityHashCode();
        for (PrivatePoint p1 : pts) {
            for (PrivatePoint p2 : pts) {
                boolean vHashEq = (int) hash.invoke(p1) == (int) hash.invoke(p2);
                boolean rHashEq = p1.hashCode() == p2.hashCode();
                assertTrue(vHashEq == rHashEq);
            }
        }
    }

    static int assertCount = 0;

    interface MHAction {
        void run() throws Throwable;
    }

    static void assertThrow(MHAction action, Class<? extends Throwable> ex) {
        try {
            action.run();
            assertTrue(false);
        } catch (Throwable t) {
            assertTrue(ex.isAssignableFrom(t.getClass()));
        }
    }

    static void assertTrue(boolean cond) {
        assertCount++;
        if (!cond) {
            throw new AssertionError();
        }
    }
}