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package org.glassfish.web.admin.monitor;

import java.util.Map;
import java.util.ResourceBundle;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.enterprise.config.serverbeans.Config;
import com.sun.enterprise.config.serverbeans.HttpService;
import com.sun.enterprise.config.serverbeans.MonitoringService;
import com.sun.enterprise.config.serverbeans.VirtualServer;

import fish.payara.monitoring.collect.MonitoringDataCollection;
import fish.payara.monitoring.collect.MonitoringDataCollector;
import fish.payara.monitoring.collect.MonitoringDataSource;

import org.glassfish.api.admin.ServerEnvironment;
import org.glassfish.external.probe.provider.PluginPoint;
import org.glassfish.external.probe.provider.StatsProviderManager;
import org.glassfish.external.statistics.CountStatistic;
import org.glassfish.web.admin.LogFacade;
import jakarta.inject.Inject;
import jakarta.inject.Named;

import org.jvnet.hk2.annotations.Service;
import org.glassfish.hk2.api.PostConstruct;
import jakarta.inject.Singleton;
import org.jvnet.hk2.config.ConfigurationException;

/**
 *
 * @author PRASHANTH ABBAGANI
 */
@Service(name = "http-service")
@Singleton
public class HttpServiceStatsProviderBootstrap implements PostConstruct, MonitoringDataSource {

    @Inject @Named(ServerEnvironment.DEFAULT_INSTANCE_NAME)
    Config config;

    @Inject
    private MonitoringService monitoringService;

    private static final Logger logger = LogFacade.getLogger();

    private static final ResourceBundle rb = logger.getResourceBundle();

    private final Map httpServiceStatsProviders = new ConcurrentHashMap<>();

    @Override
    public void postConstruct() {

        if (config == null) {
            Object[] params = {VirtualServerInfoStatsProvider.class.getName(),
                    HttpServiceStatsProvider.class.getName(),
                    "http service", "virtual server"};
            logger.log(Level.SEVERE, LogFacade.UNABLE_TO_REGISTER_STATS_PROVIDERS, params);
            throw new ConfigurationException(rb.getString(LogFacade.NULL_CONFIG));
        }

        HttpService httpService = config.getHttpService();
        for (VirtualServer vs : httpService.getVirtualServer()) {
            String id = vs.getId();
            StatsProviderManager.register(
                    "http-service",
                    PluginPoint.SERVER,
                    "http-service/" + id,
                    new VirtualServerInfoStatsProvider(vs));
            HttpServiceStatsProvider httpServiceStatsProvider = new HttpServiceStatsProvider(id,
                    vs.getNetworkListeners(), config.getNetworkConfig());
            httpServiceStatsProviders.put(id, httpServiceStatsProvider);
            StatsProviderManager.register(
                    "http-service",
                    PluginPoint.SERVER,
                    "http-service/" + id + "/request",
                    httpServiceStatsProvider);
        }
    }

    static {
        MonitoringDataCollection.register(CountStatistic.class,
                (collector, count) -> collector.collect(count.getName(), count.getCount()));
    }

    @Override
    public void collect(MonitoringDataCollector collector) {
        if (!"true".equals(monitoringService.getMonitoringEnabled()) ||
            !"HIGH".equals(monitoringService.getModuleMonitoringLevels().getHttpService())) {
            return;
        }
        MonitoringDataCollector http = collector.in("http").prefix("Server");
        for (HttpServiceStatsProvider provider : httpServiceStatsProviders.values()) {
            http.collectObject(provider, MonitoringDataCollection::collectObject);
        }
    }
}