package com.tourguide.modules.order.service;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.tourguide.common.exception.BusinessException;
import com.tourguide.common.huifu.biz.DouGongPayUtil;
import com.tourguide.modules.order.dto.MiniPaymentResponse;
import com.tourguide.modules.order.payment.OrderPaymentPreparation;
import com.tourguide.modules.user.entity.MiniUser;
import com.tourguide.modules.user.service.MiniUserService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

@Service
public class HuifuMiniPaymentService {
    private static final String SUCCESS_CODE = "00000100";
    private static final Logger log = LoggerFactory.getLogger(HuifuMiniPaymentService.class);

    private final MiniUserService miniUserService;
    private final TourOrderPaymentService orderPaymentService;
    private final DouGongPayUtil payUtil;

    public HuifuMiniPaymentService(MiniUserService miniUserService,
                                   TourOrderPaymentService orderPaymentService,
                                   DouGongPayUtil payUtil) {
        this.miniUserService = miniUserService;
        this.orderPaymentService = orderPaymentService;
        this.payUtil = payUtil;
    }

    public MiniPaymentResponse create(Long visitorId, Long orderId) {
        MiniUser user = miniUserService.findEnabledById(visitorId);
        if (!StringUtils.hasText(user.getOpenid())) {
            throw new BusinessException(409, "当前账号缺少微信 OpenID，请重新登录后支付");
        }
        OrderPaymentPreparation preparation = orderPaymentService.prepare(visitorId, orderId);
        JSONObject response;
        try {
            response = payUtil.wxPayOrder(preparation.getAmount(), user.getOpenid(),
                    preparation.getGoodsDescription(), preparation.getReqSeqId(), preparation.getReqDate());
        } catch (IllegalStateException exception) {
            log.warn("创建汇付支付订单失败，订单ID：{}，请求流水号：{}，原因：{}",
                    orderId, preparation.getReqSeqId(), exception.getMessage());
            throw new BusinessException(503, exception.getMessage());
        } catch (Exception exception) {
            log.error("调用汇付支付服务异常，订单ID：{}，请求流水号：{}",
                    orderId, preparation.getReqSeqId(), exception);
            throw new BusinessException(502, "汇付支付服务暂不可用，请稍后重试");
        }
        JSONObject data = jsonObject(response.get("data"));
        if (data == null) data = jsonObject(response.get("resp_data"));
        String responseCode = response.getString("resp_code");
        if (!StringUtils.hasText(responseCode) && data != null) responseCode = data.getString("resp_code");
        if (!SUCCESS_CODE.equals(responseCode)) {
            String description = response.getString("resp_desc");
            if (!StringUtils.hasText(description) && data != null) description = data.getString("resp_desc");
            throw new BusinessException(502, StringUtils.hasText(description) ? description : "创建支付订单失败");
        }
        Object payInfoValue = data == null ? response.get("pay_info") : data.get("pay_info");
        JSONObject payInfo = jsonObject(payInfoValue);
        if (payInfo != null && payInfo.containsKey("wx_data")) payInfo = jsonObject(payInfo.get("wx_data"));
        if (payInfo == null) throw new BusinessException(502, "汇付响应缺少微信支付参数");

        String timeStamp = value(payInfo, "timeStamp", "timestamp", "time_stamp");
        String nonceStr = value(payInfo, "nonceStr", "nonce_str", "noncestr");
        String packageValue = value(payInfo, "package", "packageValue");
        String signType = value(payInfo, "signType", "sign_type");
        String paySign = value(payInfo, "paySign", "pay_sign");
        if (!StringUtils.hasText(timeStamp) || !StringUtils.hasText(nonceStr)
                || !StringUtils.hasText(packageValue) || !StringUtils.hasText(paySign)) {
            throw new BusinessException(502, "汇付响应中的微信支付参数不完整");
        }
        return new MiniPaymentResponse(preparation.getOrderId(), preparation.getReqSeqId(), "wxpay",
                timeStamp, nonceStr, packageValue,
                StringUtils.hasText(signType) ? signType : "RSA", paySign);
    }

    private JSONObject jsonObject(Object value) {
        if (value == null) return null;
        if (value instanceof JSONObject) return (JSONObject) value;
        if (value instanceof String) {
            String text = ((String) value).trim();
            return text.isEmpty() ? null : JSONObject.parseObject(text);
        }
        return JSONObject.parseObject(JSON.toJSONString(value));
    }

    private String value(JSONObject source, String... keys) {
        for (String key : keys) {
            String value = source.getString(key);
            if (StringUtils.hasText(value)) return value;
        }
        return null;
    }
}