package com.tourguide.common.huifu;

import com.alibaba.fastjson.JSONObject;
import com.huifu.bspay.sdk.opps.core.utils.RsaUtils;
import com.tourguide.common.huifu.properties.HuiFuProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;

/**
 * 斗拱回调入口。
 *
 * 备注：该控制器只做参数校验、验签和日志记录，订单状态落库应在后续服务层按 req_seq_id 幂等处理。
 */
@RestController
@RequestMapping("/base/dougong")
public class DouGongNotifyController {
    private static final Logger log = LoggerFactory.getLogger(DouGongNotifyController.class);

    @Autowired
    private HuiFuProperties huiFuProperties;

    @PostMapping("/pay-notify")
    public String payNotify(HttpServletRequest request) {
        return handleNotify("dougong-pay", request);
    }

    @PostMapping("/refund-logistics")
    public String refundLogistics(HttpServletRequest request) {
        return handleNotify("dougong-refund-logistics", request);
    }

    @PostMapping("/refund-crosscity")
    public String refundCrossCity(HttpServletRequest request) {
        return handleNotify("dougong-refund-crosscity", request);
    }

    @PostMapping("/encashment")
    public String encashment(HttpServletRequest request) {
        return handleNotify("dougong-encashment", request);
    }

    private String handleNotify(String bizName, HttpServletRequest request) {
        String sign = request.getParameter("sign");
        String respData = request.getParameter("resp_data");
        if (!StringUtils.hasText(sign) || !StringUtils.hasText(respData)) {
            log.warn("{} missing params, sign={}, resp_data={}", bizName, sign, respData);
            return "FAIL";
        }

        // 备注：斗拱回调可能把括号转义为带空格的 HTML 实体，验签前必须恢复原文，否则签名会不一致。
        String normalizedRespData = respData.replaceAll("& #40;", "(").replaceAll("& #41;", ")");
        boolean verified = RsaUtils.verify(normalizedRespData, huiFuProperties.getRsaPublicKey(), sign);
        if (!verified) {
            log.warn("{} signature verify failed, resp_data={}", bizName, normalizedRespData);
            return "FAIL";
        }

        JSONObject body = JSONObject.parseObject(normalizedRespData);
        // 备注：当前阶段先记录回调关键流水，后续订单支付确认、退款确认、提现确认都应从这里分发到幂等服务。
        log.info("{} verified, req_seq_id={}, org_req_seq_id={}, trans_stat={}, body={}",
                bizName,
                body.getString("req_seq_id"),
                body.getString("org_req_seq_id"),
                body.getString("trans_stat"),
                body);
        return "200";
    }
}