package com.fdkankan.openApi.aop;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.fdkankan.common.constant.ErrorCode;
import com.fdkankan.common.constant.ServerCode;
import com.fdkankan.openApi.constant.HttpStatus;
import com.fdkankan.openApi.constant.RedisKey;
import com.fdkankan.openApi.exception.ApiBusinessException;
import com.fdkankan.openApi.mq.dto.CallApiDTO;
import com.fdkankan.openApi.mq.sender.CallApiSender;
import com.fdkankan.openApi.service.system.IUserAuthInfoService;
import com.fdkankan.redis.util.RedisUtil;
import com.fdkankan.web.response.ResultData;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

@Order(999)
@Component
@Aspect
@Slf4j
public class ValidateApiAOP {

    @Autowired

    private RedisUtil redisUtil;
    @Autowired
    private CallApiSender callApiSender;
    @Autowired
    private IUserAuthInfoService userAuthService;
    @Autowired
    private LocalOverCache localOverCache;

    @Before("@annotation(validateApi)")
    public void doBefore(JoinPoint joinPoint, ValidateApi validateApi) {
        String method = validateApi.method();
        boolean counting = validateApi.counting();


        log.info("前置拦截鉴权，{}", method);
        //获取请求对象
        ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = servletRequestAttributes.getRequest();
        //请求头
        String authorization = request.getHeader("Authorization");
        if (ObjectUtil.isNull(authorization)) {
            throw new ApiBusinessException(ErrorCode.AUTH_FAIL);

        }
        if (!authorization.equalsIgnoreCase("admin")) {
            if (StrUtil.isEmpty(authorization)) {
                throw new ApiBusinessException(ErrorCode.AUTH_FAIL);
            }
            //数据库鉴权
            userAuthService.checkValidAppKey(authorization);
        }
        if (counting) {
            //判断是否是无限制
            boolean isInfinite = redisUtil.sExists(RedisKey.API_METHOD_COUNT_INFINITE, authorization);
            if(!isInfinite){
                //预减次数
                long decrStock = redisUtil.decr(String.format(RedisKey.API_METHOD_COUNT, authorization), 1);
                log.info("前置减次数后，{}", decrStock);
                if (decrStock < 0) {
                    //次数用完后，redis次数会变成负一，这里需要返还一次，变为0，客户增加次数时，从0增加
                    redisUtil.incr(String.format(RedisKey.API_METHOD_COUNT, authorization), 1);
                    throw new ApiBusinessException(HttpStatus.COUNT_OVER, "");
                }
            }
        }
    }

    /**
     * 处理请求后执行
     *
     * @param joinPoint
     * @param validateApi
     * @param jsonResult
     * @return
     */
    @AfterReturning(pointcut = "@annotation(validateApi)", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, ValidateApi validateApi, Object jsonResult) throws NoSuchMethodException {
        String method = validateApi.method();
        boolean counting = validateApi.counting();
        log.info("后置拦截截鉴权计数，{}，返回内容{}", method, jsonResult);
        //获取请求对象
        ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = servletRequestAttributes.getRequest();
        String authorization = request.getHeader("Authorization");
        //方法签名
        if (BeanUtil.toBean(jsonResult, ResultData.class).getCode() == ServerCode.SUCCESS.code()) {
            if (counting) {
                log.info("进入队列，同步数据库");
                callApiSender.callApi(new CallApiDTO(authorization));
            }
        } else {
            if (counting) {
                log.info("业务非正常返回，进行次数回滚+1：{}");
                redisUtil.incr(String.format(RedisKey.API_METHOD_COUNT, authorization), 1);
            }
        }
    }

    /**
     * 处理请求后执行
     *
     * @param joinPoint
     * @param validateApi
     * @param jsonResult
     * @return
     */
    @AfterThrowing(throwing = "ex",pointcut = "@annotation(validateApi)")
    public void doAfterThrowing(Throwable ex, ValidateApi validateApi) throws NoSuchMethodException {
        String method = validateApi.method();
        boolean counting = validateApi.counting();
        log.info("后置拦截截鉴权计数，{}", method);
        //获取请求对象
        ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = servletRequestAttributes.getRequest();
        String authorization = request.getHeader("Authorization");
        if(counting){
            redisUtil.incr(String.format(RedisKey.API_METHOD_COUNT, authorization), 1);
        }
    }


}