// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.model.container;

import com.yahoo.cloud.config.ZookeeperServerConfig;
import com.yahoo.config.model.api.ModelContext;
import com.yahoo.config.model.api.container.ContainerServiceType;
import com.yahoo.config.model.deploy.DeployState;
import com.yahoo.config.model.producer.AbstractConfigProducer;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.search.config.QrStartConfig;
import com.yahoo.vespa.model.container.component.SimpleComponent;

import java.util.Optional;

import static com.yahoo.vespa.defaults.Defaults.getDefaults;

/**
 * A container that is typically used by container clusters set up from the user application.
 *
 * @author gjoranv
 */
public final class ApplicationContainer extends Container implements
        QrStartConfig.Producer,
        ZookeeperServerConfig.Producer {

    private static final String defaultHostedJVMArgs = "-XX:+SuppressFatalErrorMessage";

    private final boolean isHostedVespa;
    private final boolean enableServerOcspStapling;
    private final boolean useQrserverServiceName;

    public ApplicationContainer(AbstractConfigProducer<?> parent, String name, int index, DeployState deployState) {
        this(parent, name, false, index, deployState);
    }

    public ApplicationContainer(AbstractConfigProducer<?> parent, String name, boolean retired, int index, DeployState deployState) {
        super(parent, name, retired, index, deployState);
        this.isHostedVespa = deployState.isHosted();
        this.enableServerOcspStapling = deployState.featureFlags().enableServerOcspStapling();
        this.useQrserverServiceName = deployState.featureFlags().useQrserverServiceName();

        addComponent(new SimpleComponent("com.yahoo.container.jdisc.messagebus.NetworkMultiplexerHolder"));
        addComponent(new SimpleComponent("com.yahoo.container.jdisc.messagebus.NetworkMultiplexerProvider"));
        addComponent(new SimpleComponent("com.yahoo.container.jdisc.messagebus.SessionCache"));
        addComponent(new SimpleComponent("com.yahoo.container.jdisc.SystemInfoProvider"));
        addComponent(new SimpleComponent("com.yahoo.container.jdisc.ZoneInfoProvider"));
    }

    @Override
    public void getConfig(QrStartConfig.Builder builder) {
        if (getHostResource() != null) {
            NodeResources nodeResources = getHostResource().realResources();
            if ( ! nodeResources.isUnspecified()) {
                builder.jvm.availableProcessors(Math.max(2, (int)Math.ceil(nodeResources.vcpu())));
            }
        }
    }

    @Override
    protected ContainerServiceType myServiceType() {
        if (parent instanceof ContainerCluster) {
            ContainerCluster<?> cluster = (ContainerCluster<?>)parent;
            // TODO: The 'qrserver' name is retained for legacy reasons (e.g. system tests and log parsing).
            if (useQrserverServiceName && cluster.getSearch() != null && cluster.getDocproc() == null && cluster.getDocumentApi() == null) {
                return ContainerServiceType.QRSERVER;
            }
        }
        return ContainerServiceType.CONTAINER;
    }

    /** Returns the jvm arguments this should start with */
    @Override
    public String getJvmOptions() {
        StringBuilder b = new StringBuilder();
        if (isHostedVespa) {
            if (hasDocproc()) {
                b.append(ApplicationContainer.defaultHostedJVMArgs).append(' ');
            }
            if (enableServerOcspStapling) {
                b.append("-Djdk.tls.server.enableStatusRequestExtension=true ")
                        .append("-Djdk.tls.stapling.responseTimeout=2000 ")
                        .append("-Djdk.tls.stapling.cacheSize=256 ")
                        .append("-Djdk.tls.stapling.cacheLifetime=3600 ");
            }
        }
        String jvmArgs = super.getJvmOptions();
        if (!jvmArgs.isBlank()) {
             b.append(jvmArgs.trim());
        }
        return b.toString().trim();
    }

    private boolean hasDocproc() {
        return (parent instanceof ContainerCluster) && (((ContainerCluster<?>)parent).getDocproc() != null);
    }

    @Override
    public void getConfig(ZookeeperServerConfig.Builder builder) {
        builder.myid(index());
    }

    @Override
    protected String jvmOmitStackTraceInFastThrowOption(ModelContext.FeatureFlags featureFlags) {
        return featureFlags.jvmOmitStackTraceInFastThrowOption(ClusterSpec.Type.container);
    }

    @Override
    public Optional<String> getPreShutdownCommand() {
        int preshutdownTimeoutSeconds = 360;
        int rpcTimeoutSeconds = preshutdownTimeoutSeconds + 10;
        String rpcParams = "-t " + rpcTimeoutSeconds + " tcp/localhost:" + getRpcPort() + " prepareStop d:" + preshutdownTimeoutSeconds;
        return Optional.of(getDefaults().underVespaHome("bin/vespa-rpc-invoke") + " " + rpcParams);
    }
}