package com.ruoyi.other.api.factory;

import com.ruoyi.common.core.domain.R;
import com.ruoyi.other.api.feignClient.FleetOrderAggregateClient;
import com.ruoyi.other.api.vo.FleetOrderAggregateVO;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.cloud.openfeign.FallbackFactory;
import org.springframework.stereotype.Component;

/**
 * 车队订单聚合 Feign 调用失败兜底：返回 0 三列（前端渲染为 -）。
 * 聚合服务异常不应阻塞车队列表加载，故采用"软失败"策略。
 */
@Component
public class FleetOrderAggregateFallbackFactory implements FallbackFactory<FleetOrderAggregateClient> {

    private static final Logger log = LoggerFactory.getLogger(FleetOrderAggregateFallbackFactory.class);

    @Override
    public FleetOrderAggregateClient create(Throwable cause) {
        log.warn("[FleetOrderAggregate] feign fallback, cause={}", cause == null ? "null" : cause.toString());
        return fleetId -> R.ok(empty());
    }

    private FleetOrderAggregateVO empty() {
        FleetOrderAggregateVO vo = new FleetOrderAggregateVO();
        vo.setCumulativeCharge(java.math.BigDecimal.ZERO);
        vo.setCumulativeElectrovalence(java.math.BigDecimal.ZERO);
        vo.setCumulativeServiceCharge(java.math.BigDecimal.ZERO);
        return vo;
    }
}