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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
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 *
 * without restriction, including without limitation the rights to copy, create
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
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package com.oracle.truffle.sl.runtime;

import static com.oracle.truffle.sl.runtime.SLContext.fromForeignValue;

import java.util.List;

import com.oracle.truffle.api.CallTarget;
import com.oracle.truffle.api.Truffle;
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.RootNode;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.object.ObjectType;
import com.oracle.truffle.sl.SLLanguage;
import com.oracle.truffle.sl.nodes.call.SLDispatchNode;
import com.oracle.truffle.sl.nodes.call.SLDispatchNodeGen;
import com.oracle.truffle.sl.nodes.interop.SLForeignReadNode;
import com.oracle.truffle.sl.nodes.interop.SLForeignWriteNode;

final class SLObjectType extends ObjectType implements ForeignAccess.Factory10, ForeignAccess.Factory {
    private final ForeignAccess access;

    public SLObjectType() {
        this.access = ForeignAccess.create(null, this);
    }

    @Override
    public ForeignAccess getForeignAccessFactory(DynamicObject obj) {
        return access;
    }

    @Override
    public CallTarget accessIsNull() {
        return Truffle.getRuntime().createCallTarget(RootNode.createConstantNode(false));
    }

    @Override
    public CallTarget accessIsExecutable() {
        return Truffle.getRuntime().createCallTarget(RootNode.createConstantNode(false));
    }

    @Override
    public CallTarget accessIsBoxed() {
        return Truffle.getRuntime().createCallTarget(RootNode.createConstantNode(false));
    }

    @Override
    public CallTarget accessHasSize() {
        throw new UnsupportedOperationException();
    }

    @Override
    public CallTarget accessGetSize() {
        throw new UnsupportedOperationException();
    }

    @Override
    public CallTarget accessUnbox() {
        throw new UnsupportedOperationException();
    }

    @Override
    public CallTarget accessRead() {
        return Truffle.getRuntime().createCallTarget(new SLForeignReadNode());
    }

    @Override
    public CallTarget accessWrite() {
        return Truffle.getRuntime().createCallTarget(new SLForeignWriteNode());
    }

    @Override
    public CallTarget accessExecute(int argumentsLength) {
        throw new UnsupportedOperationException();
    }

    @Override
    public CallTarget accessInvoke(int argumentsLength) {
        return Truffle.getRuntime().createCallTarget(new SLForeignInvokeRootNode());
    }

    @Override
    public CallTarget accessNew(int argumentsLength) {
        throw new UnsupportedOperationException();
    }

    @Override
    public CallTarget accessMessage(Message unknown) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean canHandle(TruffleObject obj) {
        return SLContext.isSLObject(obj);
    }

    private static class SLForeignInvokeRootNode extends RootNode {
        @Child private SLDispatchNode dispatch = SLDispatchNodeGen.create();

        public SLForeignInvokeRootNode() {
            super(SLLanguage.class, null, null);
        }

        @Override
        public Object execute(VirtualFrame frame) {
            DynamicObject receiver = (DynamicObject) ForeignAccess.getReceiver(frame);
            String name = (String) ForeignAccess.getArguments(frame).get(0);
            Object property = receiver.get(name);
            if (property instanceof SLFunction) {
                SLFunction function = (SLFunction) property;
                List<Object> args = ForeignAccess.getArguments(frame);
                Object[] arr = new Object[args.size() - 1];
                for (int i = 1; i < args.size(); i++) {
                    arr[i - 1] = fromForeignValue(args.get(i));
                }
                Object result = dispatch.executeDispatch(frame, function, arr);
                return result;
            } else {
                throw new IllegalArgumentException();
            }
        }
    }

}