package com.tourguide.modules.order.payment;

import com.tourguide.common.huifu.biz.DouGongRefundBiz;
import com.tourguide.modules.order.entity.TourOrder;
import com.tourguide.modules.order.entity.TourOrderPaymentAttempt;
import com.tourguide.modules.order.mapper.TourOrderPaymentAttemptMapper;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import java.math.BigDecimal;
import java.util.Map;

@Component
public class HuifuPaymentRefundGateway implements PaymentRefundGateway {
    private static final String SUCCESS_CODE = "00000100";

    private final DouGongRefundBiz refundBiz;
    private final TourOrderPaymentAttemptMapper paymentAttemptMapper;

    public HuifuPaymentRefundGateway(DouGongRefundBiz refundBiz,
                                     TourOrderPaymentAttemptMapper paymentAttemptMapper) {
        this.refundBiz = refundBiz;
        this.paymentAttemptMapper = paymentAttemptMapper;
    }

    @Override
    public String refund(TourOrder order, BigDecimal amount) {
        if (!StringUtils.hasText(order.getRefundOrderNo())) {
            throw new IllegalStateException("Refund request sequence is missing");
        }
        if (!StringUtils.hasText(order.getPaymentOrderNo())) {
            throw new IllegalStateException("Original payment sequence is missing");
        }
        TourOrderPaymentAttempt paymentAttempt = paymentAttemptMapper
                .selectByReqSeqIdForUpdate(order.getPaymentOrderNo());
        if (paymentAttempt == null || !StringUtils.hasText(paymentAttempt.getReqDate())) {
            throw new IllegalStateException("Original payment attempt is missing");
        }
        try {
            Map<String, Object> response = refundBiz.refund(order.getRefundOrderNo(), amount,
                    paymentAttempt.getReqDate(), paymentAttempt.getReqSeqId());
            String responseCode = stringValue(response.get("resp_code"));
            if (!SUCCESS_CODE.equals(responseCode)) {
                String description = stringValue(response.get("resp_desc"));
                throw new IllegalStateException(StringUtils.hasText(description)
                        ? description : "Huifu refund request failed");
            }
            return order.getRefundOrderNo();
        } catch (RuntimeException exception) {
            throw exception;
        } catch (Exception exception) {
            throw new IllegalStateException("Huifu refund service unavailable", exception);
        }
    }

    private String stringValue(Object value) {
        return value == null ? null : String.valueOf(value);
    }
}