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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.truffle.js.nodes.control;

import java.util.ArrayDeque;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.profiles.ConditionProfile;
import com.oracle.truffle.js.nodes.JSGuards;
import com.oracle.truffle.js.nodes.JavaScriptBaseNode;
import com.oracle.truffle.js.nodes.access.HasHiddenKeyCacheNode;
import com.oracle.truffle.js.nodes.access.PropertyGetNode;
import com.oracle.truffle.js.nodes.function.JSFunctionCallNode;
import com.oracle.truffle.js.nodes.promise.NewPromiseCapabilityNode;
import com.oracle.truffle.js.runtime.Errors;
import com.oracle.truffle.js.runtime.JSArguments;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.builtins.JSFunction;
import com.oracle.truffle.js.runtime.builtins.JSFunction.AsyncGeneratorState;
import com.oracle.truffle.js.runtime.objects.AsyncGeneratorRequest;
import com.oracle.truffle.js.runtime.objects.Completion;
import com.oracle.truffle.js.runtime.objects.PromiseCapabilityRecord;
import com.oracle.truffle.js.runtime.objects.Undefined;

public class AsyncGeneratorEnqueueNode extends JavaScriptBaseNode {
    @Child private PropertyGetNode getGeneratorStateNode;
    @Child private PropertyGetNode getAsyncGeneratorQueueNode;
    @Child private HasHiddenKeyCacheNode hasAsyncGeneratorInternalSlotsNode;
    @Child private JSFunctionCallNode callPromiseRejectNode;
    @Child private NewPromiseCapabilityNode newPromiseCapabilityNode;
    @Child private AsyncGeneratorResumeNextNode asyncGeneratorResumeNextNode;
    private final ConditionProfile notExecutingProf = ConditionProfile.createBinaryProfile();
    private final JSContext context;

    protected AsyncGeneratorEnqueueNode(JSContext context) {
        this.context = context;
        this.getGeneratorStateNode = PropertyGetNode.createGetHidden(JSFunction.ASYNC_GENERATOR_STATE_ID, context);
        this.getAsyncGeneratorQueueNode = PropertyGetNode.createGetHidden(JSFunction.ASYNC_GENERATOR_QUEUE_ID, context);
        this.hasAsyncGeneratorInternalSlotsNode = HasHiddenKeyCacheNode.create(JSFunction.ASYNC_GENERATOR_QUEUE_ID);
        this.newPromiseCapabilityNode = NewPromiseCapabilityNode.create(context);
        this.asyncGeneratorResumeNextNode = AsyncGeneratorResumeNextNode.create(context);
    }

    public static AsyncGeneratorEnqueueNode create(JSContext context) {
        return new AsyncGeneratorEnqueueNode(context);
    }

    @SuppressWarnings("unchecked")
    public Object execute(VirtualFrame frame, Object generator, Completion completion) {
        PromiseCapabilityRecord promiseCapability = newPromiseCapability();
        if (!JSGuards.isJSObject(generator) || !hasAsyncGeneratorInternalSlotsNode.executeHasHiddenKey(generator)) {
            enterErrorBranch();
            return badGeneratorError(promiseCapability);
        }
        ArrayDeque<AsyncGeneratorRequest> queue = (ArrayDeque<AsyncGeneratorRequest>) getAsyncGeneratorQueueNode.getValue(generator);
        AsyncGeneratorRequest request = AsyncGeneratorRequest.create(completion, promiseCapability);
        queueAdd(queue, request);
        AsyncGeneratorState state = (AsyncGeneratorState) getGeneratorStateNode.getValue(generator);
        if (notExecutingProf.profile(state != AsyncGeneratorState.Executing)) {
            asyncGeneratorResumeNextNode.execute(frame, (DynamicObject) generator);
        }
        return promiseCapability.getPromise();
    }

    private PromiseCapabilityRecord newPromiseCapability() {
        return newPromiseCapabilityNode.executeDefault();
    }

    @TruffleBoundary
    private static void queueAdd(ArrayDeque<AsyncGeneratorRequest> queue, AsyncGeneratorRequest request) {
        queue.addLast(request);
    }

    private void enterErrorBranch() {
        if (callPromiseRejectNode == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            callPromiseRejectNode = insert(JSFunctionCallNode.createCall());
        }
    }

    private Object badGeneratorError(PromiseCapabilityRecord promiseCapability) {
        Object badGeneratorError = Errors.createTypeErrorAsyncGeneratorObjectExpected().getErrorObjectEager(context);
        Object reject = promiseCapability.getReject();
        callPromiseRejectNode.executeCall(JSArguments.createOneArg(Undefined.instance, reject, badGeneratorError));
        return promiseCapability.getPromise();
    }
}