package com.nju.edu.pay.service.impl;

import com.alipay.api.AlipayApiException;
import com.alipay.api.internal.util.AlipaySignature;
import com.nju.edu.pay.configuration.AlipayProperties;
import com.nju.edu.pay.service.AlipayService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

@Component
@Slf4j
public class AlipayServiceImpl  implements AlipayService {
    @Autowired
    AlipayProperties alipayProperties;

    @Override
    public boolean verifySign(HttpServletRequest request) {
        // 获取支付宝POST过来反馈信息
        Map<String,String> params = new HashMap<>();
        Map requestParams = request.getParameterMap();
        for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext();) {
            String name = (String) iter.next();
            String[] values = (String[]) requestParams.get(name);
            String valueStr = "";
            for (int i = 0; i < values.length; i++) {
                valueStr = (i == values.length - 1) ? valueStr + values[i]
                        : valueStr + values[i] + ",";
            }
            params.put(name, valueStr);
        }

        try {
            boolean verifyResult = AlipaySignature.rsaCheckV1(params,
                    alipayProperties.getAlipayPublicKey(),
                    alipayProperties.getCharset(),
                    alipayProperties.getSignType());

            return verifyResult;
        } catch (AlipayApiException e) {
            log.debug("verify sign error, exception is:{}", e);
            return false;
        }
    }
}