package com.flightticket.config;

import io.micrometer.core.aop.TimedAspect;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.binder.jvm.ClassLoaderMetrics;
import io.micrometer.core.instrument.binder.jvm.JvmGcMetrics;
import io.micrometer.core.instrument.binder.jvm.JvmMemoryMetrics;
import io.micrometer.core.instrument.binder.jvm.JvmThreadMetrics;
import io.micrometer.core.instrument.binder.system.FileDescriptorMetrics;
import io.micrometer.core.instrument.binder.system.ProcessorMetrics;
import io.micrometer.core.instrument.binder.system.UptimeMetrics;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Configuration for Micrometer metrics collection.
 * Enables JVM, system, and custom business metrics.
 * Validates: Requirement 13.6
 */
@Configuration
public class MetricsConfig {

    /**
     * Enable @Timed annotation support for method-level metrics
     */
    @Bean
    public TimedAspect timedAspect(MeterRegistry registry) {
        return new TimedAspect(registry);
    }

    /**
     * Register JVM memory metrics
     */
    @Bean
    public JvmMemoryMetrics jvmMemoryMetrics() {
        return new JvmMemoryMetrics();
    }

    /**
     * Register JVM garbage collection metrics
     */
    @Bean
    public JvmGcMetrics jvmGcMetrics() {
        return new JvmGcMetrics();
    }

    /**
     * Register JVM thread metrics
     */
    @Bean
    public JvmThreadMetrics jvmThreadMetrics() {
        return new JvmThreadMetrics();
    }

    /**
     * Register JVM class loader metrics
     */
    @Bean
    public ClassLoaderMetrics classLoaderMetrics() {
        return new ClassLoaderMetrics();
    }

    /**
     * Register system processor metrics
     */
    @Bean
    public ProcessorMetrics processorMetrics() {
        return new ProcessorMetrics();
    }

    /**
     * Register system uptime metrics
     */
    @Bean
    public UptimeMetrics uptimeMetrics() {
        return new UptimeMetrics();
    }

    /**
     * Register file descriptor metrics
     */
    @Bean
    public FileDescriptorMetrics fileDescriptorMetrics() {
        return new FileDescriptorMetrics();
    }
}