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/*
 * Copyright (C) 2020 Graylog, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Server Side Public License, version 1,
 * as published by MongoDB, Inc.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * Server Side Public License for more details.
 *
 * You should have received a copy of the Server Side Public License
 * along with this program. If not, see
 * .
 */
package org.graylog2.shared.system.stats;

import com.google.inject.AbstractModule;
import org.graylog2.shared.system.stats.fs.FsProbe;
import org.graylog2.shared.system.stats.fs.JmxFsProbe;
import org.graylog2.shared.system.stats.fs.OshiFsProbe;
import org.graylog2.shared.system.stats.jvm.JvmProbe;
import org.graylog2.shared.system.stats.network.JmxNetworkProbe;
import org.graylog2.shared.system.stats.network.NetworkProbe;
import org.graylog2.shared.system.stats.network.OshiNetworkProbe;
import org.graylog2.shared.system.stats.os.JmxOsProbe;
import org.graylog2.shared.system.stats.os.OsProbe;
import org.graylog2.shared.system.stats.os.OshiOsProbe;
import org.graylog2.shared.system.stats.process.JmxProcessProbe;
import org.graylog2.shared.system.stats.process.OshiProcessProbe;
import org.graylog2.shared.system.stats.process.ProcessProbe;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SystemStatsModule extends AbstractModule {
    private static final Logger LOG = LoggerFactory.getLogger(SystemStatsModule.class);
    private final boolean disableNativeSystemStats;

    public SystemStatsModule(boolean disableNativeSystemStats) {
        this.disableNativeSystemStats = disableNativeSystemStats;
    }

    @Override
    protected void configure() {
        boolean oshiLoaded = false;

        if(disableNativeSystemStats) {
            LOG.debug("OSHI disabled. Using JMX implementations.");
        } else {
            try {
                OshiService oshiService = new OshiService();

                    bind(OshiService.class).toInstance(oshiService);
                    bind(FsProbe.class).to(OshiFsProbe.class).asEagerSingleton();
                    bind(NetworkProbe.class).to(OshiNetworkProbe.class).asEagerSingleton();
                    bind(OsProbe.class).to(OshiOsProbe.class).asEagerSingleton();
                    bind(ProcessProbe.class).to(OshiProcessProbe.class).asEagerSingleton();
                    oshiLoaded = true;
            } catch (Throwable e) {
                LOG.debug("Failed to load OSHI. Falling back to JMX implementations.", e);
            }
        }

        if (!oshiLoaded) {
            bind(FsProbe.class).to(JmxFsProbe.class).asEagerSingleton();
            bind(NetworkProbe.class).to(JmxNetworkProbe.class).asEagerSingleton();
            bind(OsProbe.class).to(JmxOsProbe.class).asEagerSingleton();
            bind(ProcessProbe.class).to(JmxProcessProbe.class).asEagerSingleton();
        }

        bind(JvmProbe.class).asEagerSingleton();
    }
}