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 * The Universal Permissive License (UPL), Version 1.0
 *
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 * person obtaining a copy of this software, associated documentation and/or
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 *
 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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package com.oracle.truffle.sl.nodes.interop;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.interop.ForeignAccess;
import com.oracle.truffle.api.interop.Message;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.source.SourceSection;
import com.oracle.truffle.sl.nodes.SLExpressionNode;
import com.oracle.truffle.sl.nodes.SLTargetableNode;
import com.oracle.truffle.sl.runtime.SLContext;

@NodeChild(type = SLExpressionNode.class)
public abstract class SLForeignToSLTypeNode extends SLTargetableNode {

    public SLForeignToSLTypeNode(SourceSection src) {
        super(src);
    }

    @Specialization
    public Object fromObject(Number value) {
        return SLContext.fromForeignValue(value);
    }

    @Specialization
    public Object fromString(String value) {
        return value;
    }

    @Specialization
    public Object fromBoolean(boolean value) {
        return value;
    }

    @Specialization
    public Object fromChar(char value) {
        return String.valueOf(value);
    }

    @Specialization(guards = "isBoxedPrimitive(frame, value)")
    public Object unbox(VirtualFrame frame, TruffleObject value) {
        Object unboxed = doUnbox(frame, value);
        return SLContext.fromForeignValue(unboxed);
    }

    @Specialization(guards = "!isBoxedPrimitive(frame, value)")
    public Object fromTruffleObject(@SuppressWarnings("unused") VirtualFrame frame, TruffleObject value) {
        return value;
    }

    @Child private Node isBoxed;

    protected final boolean isBoxedPrimitive(VirtualFrame frame, TruffleObject object) {
        if (isBoxed == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            isBoxed = insert(Message.IS_BOXED.createNode());
        }
        return (boolean) ForeignAccess.execute(isBoxed, frame, object);
    }

    protected final Object doUnbox(VirtualFrame frame, TruffleObject value) {
        initializeUnbox();
        Object object = ForeignAccess.execute(unbox, frame, value);
        return object;
    }

    @Child private Node unbox;

    private void initializeUnbox() {
        if (unbox == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            unbox = insert(Message.UNBOX.createNode());
        }
    }

}