package com.xiaopeng.operation.service.impl;

import cn.hutool.core.bean.BeanUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.xiaopeng.api.model.operation.XpTradingStrategy;
import com.xiaopeng.api.model.operation.XpTradingStrategyCity;
import com.xiaopeng.common.core.exception.ServiceException;
import com.xiaopeng.operation.dto.XpTradingStrategyEditDTO;
import com.xiaopeng.operation.mapper.XpTradingStrategyMapper;
import com.xiaopeng.operation.service.IXpTradingStrategyCityService;
import com.xiaopeng.operation.service.IXpTradingStrategyService;
import com.xiaopeng.operation.vo.XpTradingStrategyDetailVO;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.util.List;
import java.util.Objects;

/**
 * <p>
 * 交易策略配置 服务实现类
 * </p>
 *
 * @author mitao
 * @since 2026-02-03
 */
@Service
@RequiredArgsConstructor
public class XpTradingStrategyServiceImpl extends ServiceImpl<XpTradingStrategyMapper, XpTradingStrategy> implements IXpTradingStrategyService {

    private final IXpTradingStrategyCityService tradingStrategyCityService;

    @Override
    public XpTradingStrategyDetailVO queryDetail() {
        // 1. 查询交易策略主表（系统中只有一条配置，取第一条）
        XpTradingStrategy strategy = this.lambdaQuery()
                .orderByDesc(XpTradingStrategy::getId)
                .last("LIMIT 1")
                .one();

        if (Objects.isNull(strategy)) {
            throw new ServiceException("交易策略配置不存在");
        }

        // 2. 查询关联的城市列表
        List<XpTradingStrategyCity> cityList = tradingStrategyCityService.lambdaQuery()
                .eq(XpTradingStrategyCity::getStrategyId, strategy.getId())
                .list();

        // 3. 组装 VO
        XpTradingStrategyDetailVO vo = BeanUtil.copyProperties(strategy, XpTradingStrategyDetailVO.class);
        vo.setCityList(cityList);

        return vo;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void editStrategy(XpTradingStrategyEditDTO dto) {
        // 1. 校验策略是否存在
        XpTradingStrategy strategy = this.getById(dto.getId());
        if (Objects.isNull(strategy)) {
            throw new ServiceException("交易策略配置不存在");
        }

        // 2. 更新主表数据
        XpTradingStrategy updateStrategy = BeanUtil.copyProperties(dto, XpTradingStrategy.class);
        this.updateById(updateStrategy);

        // 3. 删除旧的城市关联
        tradingStrategyCityService.remove(
                new LambdaQueryWrapper<XpTradingStrategyCity>()
                        .eq(XpTradingStrategyCity::getStrategyId, dto.getId())
        );

        // 4. 插入新的城市关联
        if (!CollectionUtils.isEmpty(dto.getCityList())) {
            // 设置 strategyId
            dto.getCityList().forEach(city -> {
                city.setStrategyId(dto.getId());
                city.setId(null); // 清空 ID，让数据库自动生成
            });
            tradingStrategyCityService.saveBatch(dto.getCityList());
        }
    }
}