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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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 * 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.
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package com.oracle.truffle.api.dsl.test;

import org.junit.Assert;
import org.junit.Test;

import com.oracle.truffle.api.dsl.ImplicitCast;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.NodeChildren;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.dsl.TypeSystem;
import com.oracle.truffle.api.dsl.TypeSystemReference;
import com.oracle.truffle.api.dsl.test.ImplicitCastTestFactory.ImplicitCast0NodeFactory;
import com.oracle.truffle.api.dsl.test.ImplicitCastTestFactory.ImplicitCast1NodeFactory;
import com.oracle.truffle.api.dsl.test.ImplicitCastTestFactory.ImplicitCast2NodeFactory;
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;

public class ImplicitCastTest {

    @TypeSystem({int.class, String.class, boolean.class})
    static class ImplicitCast0Types {

        @ImplicitCast
        static boolean castInt(int intvalue) {
            return intvalue == 1 ? true : false;
        }

        @ImplicitCast
        static boolean castString(String strvalue) {
            return strvalue.equals("1");
        }

    }

    @TypeSystemReference(ImplicitCast0Types.class)
    @NodeChild(value = "operand", type = ImplicitCast0Node.class)
    abstract static class ImplicitCast0Node extends ValueNode {

        public abstract Object executeEvaluated(VirtualFrame frame, Object value2);

        @Specialization
        public String op1(String value) {
            return value;
        }

        @Specialization
        public boolean op1(boolean value) {
            return value;
        }

    }

    @Test
    public void testImplicitCast0() {
        ImplicitCast0Node node = ImplicitCast0NodeFactory.create(null);
        TestRootNode<ImplicitCast0Node> root = new TestRootNode<>(node);
        root.adoptChildren();
        Assert.assertEquals("2", root.getNode().executeEvaluated(null, "2"));
        Assert.assertEquals(true, root.getNode().executeEvaluated(null, 1));
        Assert.assertEquals("1", root.getNode().executeEvaluated(null, "1"));
        Assert.assertEquals(true, root.getNode().executeEvaluated(null, 1));
        Assert.assertEquals(true, root.getNode().executeEvaluated(null, true));
    }

    @TypeSystemReference(ImplicitCast0Types.class)
    @NodeChild(value = "operand", type = ImplicitCast1Node.class)
    abstract static class ImplicitCast1Node extends ValueNode {

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

        @Specialization
        public String op0(String value) {
            return value;
        }

        @Specialization(rewriteOn = RuntimeException.class)
        public boolean op1(@SuppressWarnings("unused") boolean value) throws RuntimeException {
            throw new RuntimeException();
        }

        @Specialization(contains = "op1")
        public boolean op2(boolean value) {
            return value;
        }

    }

    @Test
    public void testImplicitCast1() {
        ImplicitCast1Node node = ImplicitCast1NodeFactory.create(null);
        TestRootNode<ImplicitCast1Node> root = new TestRootNode<>(node);
        root.adoptChildren();
        Assert.assertEquals("2", root.getNode().executeEvaluated(null, "2"));
        Assert.assertEquals(true, root.getNode().executeEvaluated(null, 1));
        Assert.assertEquals("1", root.getNode().executeEvaluated(null, "1"));
        Assert.assertEquals(true, root.getNode().executeEvaluated(null, 1));
        Assert.assertEquals(true, root.getNode().executeEvaluated(null, true));
    }

    @TypeSystemReference(ImplicitCast0Types.class)
    @NodeChildren({@NodeChild(value = "operand0", type = ImplicitCast2Node.class), @NodeChild(value = "operand1", type = ImplicitCast2Node.class, executeWith = "operand0")})
    // TODO temporary workaround
    abstract static class ImplicitCast2Node extends ValueNode {

        @Specialization
        public String op0(String v0, String v1) {
            return v0 + v1;
        }

        @SuppressWarnings("unused")
        @Specialization(rewriteOn = RuntimeException.class)
        public boolean op1(boolean v0, boolean v1) throws RuntimeException {
            throw new RuntimeException();
        }

        @Specialization(contains = "op1")
        public boolean op2(boolean v0, boolean v1) {
            return v0 && v1;
        }

        public abstract Object executeEvaluated(VirtualFrame frame, Object v1);

        public abstract Object executeEvaluated(VirtualFrame frame, Object v1, Object v2);

        public abstract Object executeEvaluated(VirtualFrame frame, boolean v1, boolean v2);

    }

    @Test
    public void testImplicitCast2() {
        ImplicitCast2Node node = ImplicitCast2NodeFactory.create(null, null);
        TestRootNode<ImplicitCast2Node> root = new TestRootNode<>(node);
        root.adoptChildren();
        Assert.assertEquals("42", root.getNode().executeEvaluated(null, "4", "2"));
        Assert.assertEquals(true, root.getNode().executeEvaluated(null, 1, 1));
        Assert.assertEquals("42", root.getNode().executeEvaluated(null, "4", "2"));
        Assert.assertEquals(true, root.getNode().executeEvaluated(null, 1, 1));
        Assert.assertEquals(true, root.getNode().executeEvaluated(null, true, true));
    }

    @TypeSystem({String.class, boolean.class})
    static class ImplicitCastError1 {

        @ImplicitCast
        @ExpectError("Target type and source type of an @ImplicitCast must not be the same type.")
        static String castInvalid(@SuppressWarnings("unused") String value) {
            throw new AssertionError();
        }

    }

    @TypeSystem({String.class, boolean.class})
    static class ImplicitCastError2 {

        @ImplicitCast
        @ExpectError("Target type and source type of an @ImplicitCast must not be the same type.")
        static String castInvalid(@SuppressWarnings("unused") String value) {
            throw new AssertionError();
        }

    }

}