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package fish.payara.microprofile.metrics.cdi.interceptor;

import fish.payara.microprofile.metrics.MetricsService;
import fish.payara.microprofile.metrics.cdi.AnnotationReader;
import jakarta.enterprise.inject.Intercepted;
import jakarta.enterprise.inject.spi.Bean;
import jakarta.inject.Inject;
import jakarta.interceptor.AroundConstruct;
import jakarta.interceptor.AroundInvoke;
import jakarta.interceptor.AroundTimeout;
import jakarta.interceptor.InvocationContext;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Member;
import org.eclipse.microprofile.metrics.Metric;
import org.eclipse.microprofile.metrics.MetricID;
import org.eclipse.microprofile.metrics.annotation.Counted;
import org.eclipse.microprofile.metrics.annotation.Timed;
import org.glassfish.internal.api.Globals;

/* package-private */ abstract class AbstractInterceptor {

    @Inject
    @Intercepted
    protected Bean bean;

    private MetricsService metricsService;
    private MetricsService.MetricsContext metricsContext;

    protected static  M apply(E element,
            Class bean, AnnotationReader reader, Class metricType, 
                                                                                     ThreeFunctionResolver, String,M> loader) {
        MetricID metricID = reader.metricID(bean, element);
        Timed timedAnnotation = element.getAnnotation(Timed.class);
        Counted countedAnnotation = element.getAnnotation(Counted.class);
        String scope = null;
        if(timedAnnotation != null) {
            scope = timedAnnotation.scope();
        }
        
        if(countedAnnotation != null) {
            scope = countedAnnotation.scope();
        }
        
        M metric = loader.apply(metricID, metricType, scope);
        if (metric == null) {
            throw new IllegalStateException(
                    "No " + metricType.getSimpleName() + " with ID [" + metricID + "] found in application registry");
        }
        return metric;
    }

    public  T getMetric(MetricID metricID, Class metricType, String scope) {
        initService();
        if(scope != null) {
            return metricsContext.getOrCreateRegistry(scope).getMetric(metricID, metricType);
        }
        return metricsContext.getApplicationRegistry().getMetric(metricID, metricType);
    }

    @AroundConstruct
    private Object constructorInvocation(InvocationContext context) throws Exception {
        return preInterceptor(context, context.getConstructor());
    }

    @AroundInvoke
    private Object methodInvocation(InvocationContext context) throws Exception {
        return preInterceptor(context, context.getMethod());
    }

    @AroundTimeout
    private Object timeoutInvocation(InvocationContext context) throws Exception {
        return preInterceptor(context, context.getMethod());
    }
    
    private  Object preInterceptor(InvocationContext context, E element) throws Exception {
        initService();
        if (metricsService.isEnabled()) {
            //FIXME there is an issue here: the element does not correctly reflect the updated annotations
            // to be fully correct this would need to be wrapped and based on
            // Set bindings = (Set) invocationContext.getContextData().get("org.jboss.weld.interceptor.bindings");
            // to provide AnnotatedElement implementation
            return applyInterceptor(context, element);
        }
        return context.proceed();
    }

    private void initService() {
        if (metricsService == null) {
            metricsService = Globals.getDefaultBaseServiceLocator().getService(MetricsService.class);
            if (metricsService.isEnabled()) {
                metricsContext = metricsService.getContext(true);
            }
        }
    }

    protected abstract  Object applyInterceptor(InvocationContext context, E element) throws Exception;



}