package cn.iocoder.yudao.module.mes.service.dv.metering;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
import cn.iocoder.yudao.module.infra.api.config.ConfigApi;
import cn.iocoder.yudao.module.mes.controller.admin.dv.metering.vo.MesDvMeteringPageReqVO;
import cn.iocoder.yudao.module.mes.controller.admin.dv.metering.vo.MesDvMeteringSaveReqVO;
import cn.iocoder.yudao.module.mes.dal.dataobject.dv.metering.MesDvMeteringDO;
import cn.iocoder.yudao.module.mes.dal.mysql.dv.metering.MesDvMeteringMapper;
import cn.iocoder.yudao.module.mes.service.dv.meteringcheck.MesDvMeteringCheckService;
import cn.hutool.core.util.StrUtil;
import jakarta.annotation.Resource;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Service;
import org.springframework.validation.annotation.Validated;

import java.time.LocalDate;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
import static cn.iocoder.yudao.module.mes.enums.ErrorCodeConstants.DV_METERING_CODE_DUPLICATE;
import static cn.iocoder.yudao.module.mes.enums.ErrorCodeConstants.DV_METERING_HAS_CHECK_RECORD;
import static cn.iocoder.yudao.module.mes.enums.ErrorCodeConstants.DV_METERING_NOT_EXISTS;

/**
 * MES 计量器具 Service 实现类
 *
 * @author 超级管理员
 */
@Service
@Validated
public class MesDvMeteringServiceImpl implements MesDvMeteringService {

    /**
     * 提醒天数配置 KEY（infra_config）
     */
    private static final String REMIND_DAYS_CONFIG_KEY = "mes.dv-metering.remind-days";
    /**
     * 提醒天数默认值
     */
    private static final int DEFAULT_REMIND_DAYS = 30;

    @Resource
    private MesDvMeteringMapper meteringMapper;
    @Resource
    @Lazy // 延迟加载，避免与计量检测记录 Service 循环依赖
    private MesDvMeteringCheckService meteringCheckService;
    @Resource
    private MesDvMeteringRemindService meteringRemindService;
    @Resource
    private ConfigApi configApi;

    @Override
    public Long createMetering(MesDvMeteringSaveReqVO createReqVO) {
        // 校验编码唯一
        validateMeteringCodeUnique(null, createReqVO.getCode());

        // 插入
        MesDvMeteringDO metering = BeanUtils.toBean(createReqVO, MesDvMeteringDO.class);
        meteringMapper.insert(metering);
        return metering.getId();
    }

    @Override
    public void updateMetering(MesDvMeteringSaveReqVO updateReqVO) {
        // 校验存在
        validateMeteringExists(updateReqVO.getId());
        // 校验编码唯一
        validateMeteringCodeUnique(updateReqVO.getId(), updateReqVO.getCode());

        // 更新
        MesDvMeteringDO updateObj = BeanUtils.toBean(updateReqVO, MesDvMeteringDO.class);
        meteringMapper.updateById(updateObj);
    }

    @Override
    public void deleteMetering(Long id) {
        // 校验存在
        validateMeteringExists(id);
        // 校验无关联检测记录
        if (meteringCheckService.getMeteringCheckCountByMeteringId(id) > 0) {
            throw exception(DV_METERING_HAS_CHECK_RECORD);
        }

        // 删除
        meteringMapper.deleteById(id);
    }

    @Override
    public void validateMeteringExists(Long id) {
        if (meteringMapper.selectById(id) == null) {
            throw exception(DV_METERING_NOT_EXISTS);
        }
    }

    private void validateMeteringCodeUnique(Long id, String code) {
        if (StrUtil.isBlank(code)) {
            return;
        }
        MesDvMeteringDO metering = meteringMapper.selectByCode(code);
        if (metering == null) {
            return;
        }
        if (ObjUtil.notEqual(metering.getId(), id)) {
            throw exception(DV_METERING_CODE_DUPLICATE);
        }
    }

    @Override
    public MesDvMeteringDO getMetering(Long id) {
        return meteringMapper.selectById(id);
    }

    @Override
    public PageResult<MesDvMeteringDO> getMeteringPage(MesDvMeteringPageReqVO pageReqVO) {
        // 1. 到期状态转换为日期范围，走 DB 过滤
        Integer expireStatus = pageReqVO.getExpireStatus();
        if (expireStatus != null) {
            LocalDate today = LocalDate.now();
            int remindDays = getRemindDays();
            switch (expireStatus) {
                case 1 -> { // 已过期：到期日 < 今天
                    pageReqVO.setNextCheckDateEnd(today.minusDays(1));
                }
                case 2 -> { // 即将到期：到期日在 [今天, 今天+提醒天数]
                    pageReqVO.setNextCheckDateBegin(today);
                    pageReqVO.setNextCheckDateEnd(today.plusDays(remindDays));
                }
                case 3 -> { // 正常：到期日 > 今天+提醒天数
                    pageReqVO.setNextCheckDateBegin(today.plusDays(remindDays + 1));
                }
                default -> {
                }
            }
        }
        // 2. 查询
        PageResult<MesDvMeteringDO> pageResult = meteringMapper.selectPage(pageReqVO);
        // 3. 懒触发到期提醒站内信（best-effort，不影响查询）
        meteringRemindService.sendExpireRemind();
        return pageResult;
    }

    @Override
    public int getRemindDays() {
        String value = configApi.getConfigValueByKey(REMIND_DAYS_CONFIG_KEY);
        if (StrUtil.isBlank(value)) {
            return DEFAULT_REMIND_DAYS;
        }
        try {
            return Integer.parseInt(value.trim());
        } catch (NumberFormatException ex) {
            return DEFAULT_REMIND_DAYS;
        }
    }

    @Override
    public void updateMeteringCheckInfo(Long meteringId, LocalDate lastCheckDate, LocalDate nextCheckDate) {
        meteringMapper.updateById(new MesDvMeteringDO()
                .setId(meteringId)
                .setLastCheckDate(lastCheckDate)
                .setNextCheckDate(nextCheckDate));
    }

    @Override
    public List<MesDvMeteringDO> getMeteringList() {
        return meteringMapper.selectList();
    }

    @Override
    public List<MesDvMeteringDO> getMeteringList(Collection<Long> ids) {
        if (CollUtil.isEmpty(ids)) {
            return Collections.emptyList();
        }
        return meteringMapper.selectByIds(ids);
    }

}