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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) [2016-2021] Payara Foundation and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://github.com/payara/Payara/blob/master/LICENSE.txt
 * See the License for the specific
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 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/legal/LICENSE.txt.
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 * GPL Classpath Exception:
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 * exception as provided by the Payara Foundation in the GPL Version 2 section of the License
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package fish.payara.micro.cdi.extension.cluster;

import com.sun.enterprise.container.common.impl.util.ClusteredSingletonLookupImplBase;
import static com.sun.enterprise.container.common.spi.ClusteredSingletonLookup.SingletonType.CDI;
import fish.payara.cluster.Clustered;
import static fish.payara.micro.cdi.extension.cluster.ClusterScopeContext.getAnnotation;
import static fish.payara.micro.cdi.extension.cluster.ClusterScopeContext.getBeanName;
import java.util.Set;
import java.util.concurrent.atomic.AtomicReference;
import jakarta.enterprise.inject.spi.Bean;
import jakarta.enterprise.inject.spi.BeanManager;

/**
 * implements CDI-based clustered singleton lookups
 *
 * @author lprimak
 */
public class ClusteredSingletonLookupImpl extends ClusteredSingletonLookupImplBase {
    private final BeanManager beanManager;
    private final AtomicReference sessionKey = new AtomicReference<>();

    public ClusteredSingletonLookupImpl(BeanManager beanManager, String componentId) {
        super(componentId, CDI);
        this.beanManager = beanManager;
    }

    @Override
    public String getClusteredSessionKey() {
        return sessionKey.get();
    }

    void setClusteredSessionKeyIfNotSet(Class beanClass, Clustered clusteredAnnotation) {
        sessionKey.updateAndGet(v -> v != null ? v : makeSessionKey(beanClass, clusteredAnnotation));
    }

    private String makeSessionKey(Class beanClass, Clustered clusteredAnnotation) {
        Set> managedBeans = beanManager.getBeans(beanClass);
        if (managedBeans.size() > 1) {
            throw new IllegalArgumentException("Multiple beans found for " + beanClass);
        }
        if (managedBeans.size() == 1) {
            Bean bean = managedBeans.iterator().next();
            return getBeanName(bean, getAnnotation(beanManager, bean));
        }
        return ClusterScopeContext.firstNonNull(clusteredAnnotation.keyName(), beanClass.getName());
    }
}