/*
 * Copyright (c) 2012, 2012, 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
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 * questions.
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package com.oracle.truffle.api.dsl.test;

import com.oracle.truffle.api.CallTarget;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.NodeChildren;
import com.oracle.truffle.api.dsl.ShortCircuit;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.DoubleEvaluatedNodeFactory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.EvaluatedNodeFactory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.TestEvaluatedGenerationFactory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.TestEvaluatedVarArgs0Factory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.TestEvaluatedVarArgs1Factory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.TestEvaluatedVarArgs2Factory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.TestEvaluatedVarArgs3Factory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.TestEvaluatedVarArgs4Factory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.TestEvaluatedVarArgs5Factory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.UseDoubleEvaluated1NodeFactory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.UseDoubleEvaluated2NodeFactory;
import com.oracle.truffle.api.dsl.test.ExecuteEvaluatedTestFactory.UseEvaluatedNodeFactory;
import com.oracle.truffle.api.dsl.test.TypeSystemTest.ArgumentNode;
import com.oracle.truffle.api.dsl.test.TypeSystemTest.ChildrenNode;
import com.oracle.truffle.api.dsl.test.TypeSystemTest.TestRootNode;
import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.UnexpectedResultException;
import org.junit.Assert;
import org.junit.Test;

public class ExecuteEvaluatedTest {

    @Test
    public void testSingleEvaluated() {
        ArgumentNode arg0 = new ArgumentNode(0);
        CallTarget callTarget = TestHelper.createCallTarget(UseEvaluatedNodeFactory.create(arg0, EvaluatedNodeFactory.create(null)));

        Assert.assertEquals(43, callTarget.call(new Object[]{42}));
        Assert.assertEquals(1, arg0.getInvocationCount());
    }

    @NodeChild("exp")
    abstract static class EvaluatedNode extends ValueNode {

        @Specialization
        int doExecuteWith(int exp) {
            return exp + 1;
        }

        public abstract Object executeEvaluated(VirtualFrame frame, Object targetValue);

        public abstract int executeIntEvaluated(VirtualFrame frame, Object targetValue) throws UnexpectedResultException;
    }

    @NodeChildren({@NodeChild("exp0"), @NodeChild(value = "exp1", type = EvaluatedNode.class, executeWith = "exp0")})
    abstract static class UseEvaluatedNode extends ValueNode {

        @Specialization
        int call(int exp0, int exp1) {
            Assert.assertEquals(exp0 + 1, exp1);
            return exp1;
        }
    }

    @Test
    public void testDoubleEvaluated1() {
        ArgumentNode arg0 = new ArgumentNode(0);
        ArgumentNode arg1 = new ArgumentNode(1);
        CallTarget callTarget = TestHelper.createCallTarget(UseDoubleEvaluated1NodeFactory.create(arg0, arg1, DoubleEvaluatedNodeFactory.create(null, null)));

        Assert.assertEquals(42, callTarget.call(new Object[]{43, 1}));
        Assert.assertEquals(1, arg0.getInvocationCount());
        Assert.assertEquals(1, arg1.getInvocationCount());
    }

    @NodeChildren({@NodeChild("exp0"), @NodeChild("exp1")})
    abstract static class DoubleEvaluatedNode extends ValueNode {

        @Specialization
        int doExecuteWith(int exp0, int exp1) {
            return exp0 - exp1;
        }

        public abstract Object executeEvaluated(VirtualFrame frame, Object exp0, Object exp1);

        public abstract int executeIntEvaluated(VirtualFrame frame, Object exp0, Object exp1) throws UnexpectedResultException;
    }

    @NodeChildren({@NodeChild("exp0"), @NodeChild("exp1"), @NodeChild(value = "exp2", type = DoubleEvaluatedNode.class, executeWith = {"exp0", "exp1"})})
    abstract static class UseDoubleEvaluated1Node extends ValueNode {

        @Specialization
        int call(int exp0, int exp1, int exp2) {
            Assert.assertEquals(exp0 - exp1, exp2);
            return exp2;
        }
    }

    @Test
    public void testDoubleEvaluated2() {
        ArgumentNode arg0 = new ArgumentNode(0);
        ArgumentNode arg1 = new ArgumentNode(1);
        CallTarget callTarget = TestHelper.createCallTarget(UseDoubleEvaluated2NodeFactory.create(arg0, arg1, DoubleEvaluatedNodeFactory.create(null, null)));

        Assert.assertEquals(42, callTarget.call(new Object[]{1, 43}));
        Assert.assertEquals(1, arg0.getInvocationCount());
        Assert.assertEquals(1, arg1.getInvocationCount());
    }

    @NodeChildren({@NodeChild("exp0"), @NodeChild("exp1"), @NodeChild(value = "exp2", type = DoubleEvaluatedNode.class, executeWith = {"exp1", "exp0"})})
    abstract static class UseDoubleEvaluated2Node extends ValueNode {

        @Specialization
        int call(int exp0, int exp1, int exp2) {
            Assert.assertEquals(exp1 - exp0, exp2);
            return exp2;
        }
    }

    @Test
    public void testEvaluatedGeneration() throws UnexpectedResultException {
        TestRootNode<TestEvaluatedGeneration> root = TestHelper.createRoot(TestEvaluatedGenerationFactory.getInstance());

        Assert.assertEquals(42, root.getNode().executeEvaluated1(null, 42));
        Assert.assertEquals(42, root.getNode().executeEvaluated2(null, 42));
        Assert.assertEquals(42, root.getNode().executeEvaluated3(null, 42));
        Assert.assertEquals(42, root.getNode().executeEvaluated4(null, 42));
    }

    @NodeChildren({@NodeChild("exp0")})
    abstract static class TestEvaluatedGeneration extends ValueNode {

        public abstract Object executeEvaluated1(VirtualFrame frame, Object value);

        public abstract Object executeEvaluated2(VirtualFrame frame, int value);

        public abstract int executeEvaluated3(VirtualFrame frame, Object value) throws UnexpectedResultException;

        public abstract int executeEvaluated4(VirtualFrame frame, int value) throws UnexpectedResultException;

        @Specialization
        int call(int exp0) {
            return exp0;
        }
    }

    @Test
    public void test0VarArgs1() {
        TestRootNode<TestEvaluatedVarArgs0> root = TestHelper.createRoot(TestEvaluatedVarArgs0Factory.getInstance());
        Assert.assertEquals(42, root.getNode().execute1(null));
    }

    abstract static class TestEvaluatedVarArgs0 extends ChildrenNode {

        @Override
        public final Object execute(VirtualFrame frame) {
            return execute1(frame);
        }

        public abstract Object execute1(VirtualFrame frame, Object... value);

        @Specialization
        int call() {
            return 42;
        }
    }

    @Test
    public void test1VarArgs1() {
        TestRootNode<TestEvaluatedVarArgs1> root = TestHelper.createRoot(TestEvaluatedVarArgs1Factory.getInstance());
        Assert.assertEquals(42, root.getNode().execute1(null, 42));
    }

    @Test(expected = Throwable.class)
    public void test1VarArgs2() {
        TestRootNode<TestEvaluatedVarArgs2> root = TestHelper.createRoot(TestEvaluatedVarArgs2Factory.getInstance());
        root.getNode().execute1(null);
    }

    abstract static class TestEvaluatedVarArgs1 extends ChildrenNode {

        public abstract Object execute1(VirtualFrame frame, Object... value);

        @Specialization
        int call(int exp0) {
            return exp0;
        }
    }

    @Test
    public void test2VarArgs1() {
        TestRootNode<TestEvaluatedVarArgs2> root = TestHelper.createRoot(TestEvaluatedVarArgs2Factory.getInstance());
        Assert.assertEquals(42, root.getNode().execute1(null, 21, 21));
    }

    @Test(expected = Throwable.class)
    public void test2VarArgs2() {
        TestRootNode<TestEvaluatedVarArgs2> root = TestHelper.createRoot(TestEvaluatedVarArgs2Factory.getInstance());
        root.getNode().execute1(null, 42);
    }

    @Test(expected = Throwable.class)
    public void test2VarArgs3() {
        TestRootNode<TestEvaluatedVarArgs2> root = TestHelper.createRoot(TestEvaluatedVarArgs2Factory.getInstance());
        root.getNode().execute1(null);
    }

    abstract static class TestEvaluatedVarArgs2 extends ChildrenNode {

        public abstract Object execute1(VirtualFrame frame, Object... value);

        @Specialization
        int call(int exp0, int exp1) {
            return exp0 + exp1;
        }
    }

    @Test
    public void test3VarArgs1() {
        TestRootNode<TestEvaluatedVarArgs3> root = TestHelper.createRoot(TestEvaluatedVarArgs3Factory.getInstance());
        Assert.assertEquals(42, root.getNode().execute1(null, 42));
    }

    @NodeChild
    abstract static class TestEvaluatedVarArgs3 extends ValueNode {

        public abstract Object execute1(VirtualFrame frame, Object... value);

        @Specialization
        int call(int exp0) {
            return exp0;
        }
    }

    @Test
    public void test4VarArgs1() {
        TestRootNode<TestEvaluatedVarArgs4> root = TestHelper.createRoot(TestEvaluatedVarArgs4Factory.getInstance());
        Assert.assertEquals(42, root.getNode().execute1(null, 21, 21));
    }

    @NodeChildren({@NodeChild, @NodeChild})
    abstract static class TestEvaluatedVarArgs4 extends ValueNode {

        public abstract Object execute1(VirtualFrame frame, Object... value);

        @Specialization
        int call(int exp0, int exp1) {
            return exp0 + exp1;
        }
    }

    @Test
    public void test5VarArgs1() {
        TestRootNode<TestEvaluatedVarArgs5> root = TestHelper.createRoot(TestEvaluatedVarArgs5Factory.getInstance());
        Assert.assertEquals(42, root.getNode().execute1(null));
    }

    abstract static class TestEvaluatedVarArgs5 extends ValueNode {

        @Override
        public final Object execute(VirtualFrame frame) {
            return execute1(frame);
        }

        public abstract Object execute1(VirtualFrame frame, Object... value);

        @Specialization
        int call() {
            return 42;
        }
    }

    @SuppressWarnings("unused")
    @NodeChildren({@NodeChild(value = "a", type = ValueNode.class), @NodeChild(value = "b", type = ValueNode.class)})
    abstract static class TestEvaluatedShortCircuit1 extends Node {

        public abstract Object execute1(VirtualFrame frame, Object value);

        public abstract Object execute2(VirtualFrame frame, Object value, boolean hasB);

        public abstract Object execute3(VirtualFrame frame, Object value, boolean hasB, Object b);

        @ShortCircuit("b")
        public boolean needsB(Object a) {
            return true;
        }

        @Specialization
        int call(Object a, boolean hasB, Object b) {
            return 42;
        }
    }

    @SuppressWarnings("unused")
    @NodeChildren({@NodeChild(value = "a", type = ValueNode.class), @NodeChild(value = "b", type = ValueNode.class)})
    abstract static class TestEvaluatedShortCircuit2 extends Node {

        public abstract Object execute1(VirtualFrame frame, Object value);

        public abstract Object execute2(VirtualFrame frame, Object value, boolean hasB);

        public abstract Object execute3(VirtualFrame frame, Object value, boolean hasB, Object b);

        @ShortCircuit("b")
        public boolean needsB(Object a) {
            return true;
        }

        @Specialization
        int call(int a, boolean hasB, int b) {
            return 42;
        }

        @Specialization
        int call(Object a, boolean hasB, Object b) {
            return 42;
        }
    }

}