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package org.zodiac.datasource.jdbc.dynamic;

import org.aopalliance.aop.Advice;
import org.springframework.aop.Pointcut;
import org.springframework.aop.support.AbstractPointcutAdvisor;
import org.springframework.aop.support.ComposablePointcut;
import org.springframework.aop.support.annotation.AnnotationMatchingPointcut;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.lang.NonNull;
import org.zodiac.datasource.annotation.DataSourceSelector;

public class DynamicDataSourceAnnotationAdvisor extends AbstractPointcutAdvisor implements BeanFactoryAware {

    private static final long serialVersionUID = -7564444640159861858L;

    private Advice advice;

    private Pointcut pointcut;

    public DynamicDataSourceAnnotationAdvisor(
        @NonNull DynamicDataSourceAnnotationInterceptor dynamicDataSourceAnnotationInterceptor) {
        this.advice = dynamicDataSourceAnnotationInterceptor;
        this.pointcut = buildPointcut();
    }

    @Override
    public Pointcut getPointcut() {
        return this.pointcut;
    }

    @Override
    public Advice getAdvice() {
        return this.advice;
    }

    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        if (this.advice instanceof BeanFactoryAware) {
            ((BeanFactoryAware)this.advice).setBeanFactory(beanFactory);
        }
    }

    private Pointcut buildPointcut() {
        Pointcut cpc = new AnnotationMatchingPointcut(DataSourceSelector.class, true);
        Pointcut mpc = AnnotationMatchingPointcut.forMethodAnnotation(DataSourceSelector.class);
        return new ComposablePointcut(cpc).union(mpc);
    }
}