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// Portions Copyright [2016-2021] [Payara Foundation and/or its affiliates]

package org.glassfish.weld.services;

import com.sun.ejb.containers.BaseContainer;
import com.sun.ejb.containers.EJBContextImpl;
import com.sun.enterprise.deployment.LifecycleCallbackDescriptor;
import org.jboss.weld.construction.api.AroundConstructCallback;
import org.jboss.weld.construction.api.ConstructionHandle;
import org.jboss.weld.exceptions.WeldException;

import jakarta.enterprise.inject.spi.AnnotatedConstructor;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;

/**
 * Weld object construction callback, which invokes EJB Container's interception logic.
 * 
 * 
 * @param  instance type
 */
public class JCDIAroundConstructCallback implements AroundConstructCallback {
    private final BaseContainer container;
    private final EJBContextImpl ejbContext;

    // The AroundConstruct interceptor method can access the constructed instance using
    // InvocationContext.getTarget method after the InvocationContext.proceed completes.
    private final AtomicReference target = new AtomicReference<>();

    private ConstructionHandle handle;
    private Object[] parameters;

    public JCDIAroundConstructCallback(BaseContainer container, EJBContextImpl ejbContext) {
        this.container = container;
        this.ejbContext = ejbContext;
    }

    @Override
    public T aroundConstruct(final ConstructionHandle handle, AnnotatedConstructor constructor, Object[] parameters, Map data) {
        this.handle = handle;
        this.parameters = parameters;
        try {
            // container will end up calling createEjb() if it reaches end of interceptor chain,
            // and that will set the target reference
            container.intercept( LifecycleCallbackDescriptor.CallbackType.AROUND_CONSTRUCT, ejbContext );
        } catch (RuntimeException e) {
            throw e;
        } catch (Throwable e) {
            throw new WeldException(e);
        }
        return target.get();
    }

    /**
     * This method is invoked at end of EJB interception chain to actually construct the instance.
     */
    public T createEjb() {
        T instance = null;
        if (null != handle) {
            instance = handle.proceed(parameters, new HashMap<>());
        }

        target.set(instance);
        return instance;
    }
}