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package com.oracle.truffle.api.library.test;

import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;

import org.junit.Test;

import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.library.CachedLibrary;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
import com.oracle.truffle.api.library.GenerateLibrary;
import com.oracle.truffle.api.library.Library;
import com.oracle.truffle.api.library.test.UncachedEncapsulatedNodeTestFactory.DisabledTestNodeGen;
import com.oracle.truffle.api.library.test.UncachedEncapsulatedNodeTestFactory.Test1NodeGen;
import com.oracle.truffle.api.nodes.EncapsulatingNodeReference;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.test.AbstractLibraryTest;

@SuppressWarnings("static-method")
public class UncachedEncapsulatedNodeTest extends AbstractLibraryTest {

    @GenerateLibrary
    public abstract static class EncapsulatedNodeLibrary extends Library {

        public abstract Object m0(Object receiver);

    }

    @ExportLibrary(EncapsulatedNodeLibrary.class)
    static final class TestObject {

        @ExportMessage
        boolean accepts(@Cached("this") TestObject cached) {
            return this == cached;
        }

        @ExportMessage
        Object m0() {
            return EncapsulatingNodeReference.getCurrent().get();
        }

    }

    @Test
    public void testCachedDispatch() {
        EncapsulatedNodeLibrary lib = createCachedDispatch(EncapsulatedNodeLibrary.class, 2);

        assertNull(lib.m0(new TestObject()));
        assertNull(lib.m0(new TestObject()));
        assertSame(lib, lib.m0(new TestObject()));
        assertSame(lib, lib.m0(new TestObject()));
    }

    abstract static class Test1Node extends Node {

        abstract Object execute(Object arg);

        @Specialization(limit = "2")
        Object doLibrary(Object arg,
                        @CachedLibrary("arg") EncapsulatedNodeLibrary library) {
            return library.m0(arg);
        }

    }

    @Test
    public void testDSLNode() {
        Test1Node node = adoptNode(Test1NodeGen.create()).get();
        assertNull(node.execute(new TestObject()));
        assertNull(node.execute(new TestObject()));
        assertSame(node, node.execute(new TestObject()));
        assertSame(node, node.execute(new TestObject()));
    }

    @GenerateLibrary(pushEncapsulatingNode = false)
    public abstract static class DisabledEncapsulatedNodeLibrary extends Library {

        public abstract Object m0(Object receiver);

    }

    @ExportLibrary(DisabledEncapsulatedNodeLibrary.class)
    static final class DisabledTestObject {

        @ExportMessage
        boolean accepts(@Cached("this") DisabledTestObject cached) {
            return this == cached;
        }

        @ExportMessage
        Object m0() {
            return EncapsulatingNodeReference.getCurrent().get();
        }

    }

    @Test
    public void testDisabledCachedDispatch() {
        DisabledEncapsulatedNodeLibrary lib = createCachedDispatch(DisabledEncapsulatedNodeLibrary.class, 2);

        assertNull(lib.m0(new DisabledTestObject()));
        assertNull(lib.m0(new DisabledTestObject()));
        assertNull(lib.m0(new DisabledTestObject()));
        assertNull(lib.m0(new DisabledTestObject()));
    }

    abstract static class DisabledTestNode extends Node {

        abstract Object execute(Object arg);

        @Specialization(limit = "2")
        Object doLibrary(Object arg,
                        @CachedLibrary("arg") DisabledEncapsulatedNodeLibrary library) {
            return library.m0(arg);
        }

    }

    @Test
    public void testDisabledDSLNode() {
        DisabledTestNode node = adoptNode(DisabledTestNodeGen.create()).get();
        assertNull(node.execute(new DisabledTestObject()));
        assertNull(node.execute(new DisabledTestObject()));
        assertNull(node.execute(new DisabledTestObject()));
        assertNull(node.execute(new DisabledTestObject()));
    }

}