package com.fdkankan.cloud.acl.aop;

import cn.hutool.core.codec.Base64;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.fdkankan.cloud.acl.entity.AppConfig;
import com.fdkankan.cloud.acl.entity.AppKeyConfig;
import com.fdkankan.cloud.acl.service.IAppConfigService;
import com.fdkankan.cloud.acl.service.IAppKeyConfigService;
import com.fdkankan.common.constant.ErrorCode;
import com.fdkankan.common.exception.BusinessException;
import com.fdkankan.common.util.RsaUtil;
import com.mybatisflex.core.query.QueryWrapper;
import lombok.extern.log4j.Log4j2;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
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.crypto.Cipher;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.time.Instant;
import java.util.Objects;

@Log4j2
@Aspect
@Component
@Order(101)
public class CheckSignatureAspect {

	@Autowired
	private IAppConfigService appConfigService;
	@Autowired
	private IAppKeyConfigService appKeyConfigService;

	@Pointcut("@annotation(com.fdkankan.cloud.acl.annotation.CheckSignature)")
	public void CheckSignature() {
	}

	@Before("CheckSignature()")
	public void doBefore(JoinPoint joinPoint) throws Exception {

		HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
		String signature = request.getHeader("signature");
		if(StrUtil.isEmpty(signature)){
			throw new BusinessException(ErrorCode.FAILURE_CODE_3003.code(), "signature cannot be empty");
		}
		String appCode = request.getParameter("appCode");
		if(StrUtil.isEmpty(appCode)){
			throw new BusinessException(ErrorCode.FAILURE_CODE_3003.code(), "appCode cannot be empty");
		}
		String timestamp = request.getParameter("timestamp");
		if(StrUtil.isEmpty(timestamp)){
			throw new BusinessException(ErrorCode.FAILURE_CODE_3003.code(), "timestamp cannot be empty");
		}
		//时间戳有效时间是15分钟
		Instant now = Instant.now();
		long epochSecond = now.getEpochSecond();
		long expiraSecond = Long.valueOf(timestamp) + 15 * 60L;
		if(expiraSecond < epochSecond){
			throw new BusinessException(ErrorCode.FAILURE_CODE_3003.code(), "signature expired");
		}

		AppConfig appConfig = appConfigService.getByAppCode(appCode);
		if(Objects.isNull(appConfig)){
			throw new BusinessException(ErrorCode.FAILURE_CODE_3003);
		}

		AppKeyConfig appKeyConfig = appKeyConfigService.getByAppConfigId(appConfig.getId());
		if(Objects.isNull(appKeyConfig)){
			throw new BusinessException(ErrorCode.FAILURE_CODE_3003);
		}

		signature = RsaUtil.create(appKeyConfig.getPrivateKey(), null).decryptByPrivateKey(signature);

		log.info("解密:{}", signature);
		String[] split = signature.split("-");
		if(split.length != 2){
			throw new BusinessException(ErrorCode.FAILURE_CODE_3003.code(), "signature mismatch");
		}
		String signatureAppCode = split[0];
		String signatureTimestamp = split[1];
		if(!appCode.equals(signatureAppCode) || !timestamp.equals(signatureTimestamp)){
			throw new BusinessException(ErrorCode.FAILURE_CODE_3003.code(), "signature mismatch");
		}

	}

	public static void main(String[] args) {
		String publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCHmJkGNg0N0tKroJAbqdO6ndgdEgJBnClW3KhzUCQSLVYhBvewjlXRmc1KQbI7QHpcdbuhvGT/RVVu4npVRPnQilGSyOxLbDI4TKaM6ZMSYQ1RS5vTj2HbvJ2s21AjEhhRcDYvSEDs4KsZaOmta/Cfok8jfG46o3UB6LkwzCMHtQIDAQAB";
		String test = "af9c663f3fd744c6bf40dbcd1c9aada3-" +  "1719890259";
		String s = RsaUtil.create(null, publicKey).encryptByPublicKey(test);
		System.out.println(s);
	}

}