/*
 * Copyright 2008-2026 Async-IO.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.atmosphere.samples.springboot.chat;

import io.micrometer.core.instrument.MeterRegistry;
import org.atmosphere.cpr.AtmosphereFramework;
import org.atmosphere.metrics.AtmosphereMetrics;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.event.EventListener;

/**
 * Demonstrates Atmosphere 4.0 observability features with Spring Boot Actuator.
 *
 * <p>Metrics are available at {@code /actuator/metrics/atmosphere.*} and
 * health at {@code /actuator/health}.</p>
 */
@Configuration
public class ObservabilityConfig {

    private static final Logger logger = LoggerFactory.getLogger(ObservabilityConfig.class);

    private final AtmosphereFramework framework;
    private final MeterRegistry meterRegistry;

    public ObservabilityConfig(AtmosphereFramework framework, MeterRegistry meterRegistry) {
        this.framework = framework;
        this.meterRegistry = meterRegistry;
    }

    @EventListener(ApplicationReadyEvent.class)
    public void installMetrics() {
        if (framework.getBroadcasterFactory() == null) {
            logger.warn("BroadcasterFactory not yet initialized — skipping metrics installation");
            return;
        }
        AtmosphereMetrics.install(framework, meterRegistry);
        logger.info("Atmosphere Micrometer metrics installed — see /actuator/metrics/atmosphere.*");
    }
}
