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package com.oracle.truffle.js.nodes.promise;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.profiles.ConditionProfile;
import com.oracle.truffle.js.nodes.JavaScriptBaseNode;
import com.oracle.truffle.js.nodes.access.PropertyGetNode;
import com.oracle.truffle.js.nodes.access.PropertySetNode;
import com.oracle.truffle.js.runtime.GraalJSException;
import com.oracle.truffle.js.runtime.JSConfig;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.builtins.JSError;
import com.oracle.truffle.js.runtime.builtins.JSPromise;
import com.oracle.truffle.js.runtime.objects.Undefined;

public class RejectPromiseNode extends JavaScriptBaseNode {
    private final JSContext context;
    @Child private PropertyGetNode getPromiseRejectReactions;
    @Child private PropertySetNode setPromiseResult;
    @Child private PropertySetNode setPromiseFulfillReactions;
    @Child private PropertySetNode setPromiseRejectReactions;
    @Child private PropertyGetNode getPromiseIsHandled;
    @Child private TriggerPromiseReactionsNode triggerPromiseReactions;
    private final ConditionProfile unhandledProf = ConditionProfile.createBinaryProfile();

    protected RejectPromiseNode(JSContext context) {
        this.context = context;
        this.getPromiseRejectReactions = PropertyGetNode.createGetHidden(JSPromise.PROMISE_REJECT_REACTIONS, context);
        this.setPromiseResult = PropertySetNode.createSetHidden(JSPromise.PROMISE_RESULT, context);
        this.setPromiseFulfillReactions = PropertySetNode.createSetHidden(JSPromise.PROMISE_FULFILL_REACTIONS, context);
        this.setPromiseRejectReactions = PropertySetNode.createSetHidden(JSPromise.PROMISE_REJECT_REACTIONS, context);
        this.getPromiseIsHandled = PropertyGetNode.createGetHidden(JSPromise.PROMISE_IS_HANDLED, context);
        this.triggerPromiseReactions = TriggerPromiseReactionsNode.create(context);
    }

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

    public Object execute(DynamicObject promise, Object reason) {
        assert JSPromise.isPending(promise);

        if (!JSConfig.EagerStackTrace && context.isOptionAsyncStackTraces() && JSError.isJSError(reason)) {
            // Materialize lazy stack trace before clearing promise reactions.
            materializeLazyStackTrace((DynamicObject) reason);
        }

        Object reactions = getPromiseRejectReactions.getValue(promise);
        setPromiseResult.setValue(promise, reason);
        setPromiseFulfillReactions.setValue(promise, Undefined.instance);
        setPromiseRejectReactions.setValue(promise, Undefined.instance);
        JSPromise.setPromiseState(promise, JSPromise.REJECTED);
        if (unhandledProf.profile(getPromiseIsHandled.getValue(promise) != Boolean.TRUE)) {
            context.notifyPromiseRejectionTracker(promise, JSPromise.REJECTION_TRACKER_OPERATION_REJECT, reason);
        }
        return triggerPromiseReactions.execute(reactions, reason);
    }

    @TruffleBoundary
    private static void materializeLazyStackTrace(DynamicObject error) {
        assert JSError.isJSError(error);
        GraalJSException exception = JSError.getException(error);
        if (exception != null) {
            exception.getJSStackTrace();
        }
    }
}