package com.poyee.util;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.aop.framework.AopContext;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.util.Objects;

/**
 * spring工具类 方便在非spring管理环境中获取bean
 *
 * @author zheng
 */
@Slf4j
@Component
public final class SpringUtils implements BeanFactoryPostProcessor, ApplicationContextAware {
    /**
     * Spring应用上下文环境
     */
    private static ConfigurableListableBeanFactory beanFactory;

    private static ApplicationContext applicationContext;

    /**
     * 获取对象
     *
     * @param name
     * @return Object 一个以所给名字注册的bean的实例
     * @throws BeansException
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException {
        return (T) beanFactory.getBean(name);
    }

    /**
     * 获取类型为requiredType的对象
     *
     * @param clz
     * @return
     * @throws BeansException
     */
    public static <T> T getBean(Class<T> clz) throws BeansException {
        T result = beanFactory.getBean(clz);
        return result;
    }

    /**
     * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true
     *
     * @param name
     * @return boolean
     */
    public static boolean containsBean(String name) {
        return beanFactory.containsBean(name);
    }

    /**
     * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）
     *
     * @param name
     * @return boolean
     * @throws NoSuchBeanDefinitionException
     */
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.isSingleton(name);
    }

    /**
     * @param name
     * @return Class 注册对象的类型
     * @throws NoSuchBeanDefinitionException
     */
    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.getType(name);
    }

    /**
     * 如果给定的bean名字在bean定义中有别名，则返回这些别名
     *
     * @param name
     * @return
     * @throws NoSuchBeanDefinitionException
     */
    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.getAliases(name);
    }

    /**
     * 获取aop代理对象
     *
     * @param invoker
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> T getAopProxy(T invoker) {
        return (T) AopContext.currentProxy();
    }

    /**
     * 获取当前的环境配置，无配置返回null
     *
     * @return 当前的环境配置
     */
    public static String[] getActiveProfiles() {
        return applicationContext.getEnvironment().getActiveProfiles();
    }

    /**
     * 获取当前的环境配置，当有多个环境配置时，只获取第一个
     *
     * @return 当前的环境配置
     */
    public static String getActiveProfile() {
        final String[] activeProfiles = getActiveProfiles();
        return StringUtils.isNoneBlank(activeProfiles) ? activeProfiles[0] : null;
    }

    public static AutowireCapableBeanFactory getAutowireCapableBeanFactory() {
        return applicationContext.getAutowireCapableBeanFactory();
    }

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        SpringUtils.beanFactory = beanFactory;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringUtils.applicationContext = applicationContext;
    }

    /**
     * 获取redis
     */
    public static Object getRedis(String key,String type){
        Object obj = null;
        try{
            Object redisUtils = SpringUtils.getBean("redisUtils");
            Method method = null;
            switch (type.toLowerCase()) {
                case "set":
                    method = redisUtils.getClass().getDeclaredMethod("sGet", String.class);
                    break;
                case "zset":
                    method = redisUtils.getClass().getDeclaredMethod("zSGet", String.class);
                    break;
                case "hash":
                    method = redisUtils.getClass().getDeclaredMethod("hmget", String.class);
                    break;
                case "string":
                    method = redisUtils.getClass().getDeclaredMethod("get", String.class);
                    break;
                default:
            }
            if(Objects.nonNull(method)) {
                obj = method.invoke(redisUtils, key);
            }
        }catch (Exception e){
            e.printStackTrace();
            log.error("获取redis失败");
        }
        return obj;
    }
}