package com.ruoyi.energymeter.service.impl;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.ruoyi.energymeter.constant.EnergyMeterConstants;
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import com.ruoyi.energymeter.mapper.EnergyMeterDeviceMapper;
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import com.ruoyi.energymeter.mapper.EnergyMeterMeasurementMapper;
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import com.ruoyi.energymeter.pojo.EnergyMeterDevice;
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import com.ruoyi.energymeter.pojo.EnergyMeterMeasurement;
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import com.ruoyi.energymeter.service.EnergyMeterDemoService;
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import com.ruoyi.energymeter.util.EnergyMeterSupport;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.time.LocalDate;
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import java.time.LocalDateTime;
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import java.util.List;
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/**
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* 演示数据实现：气表按天生成模拟表码与用量。
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*
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* <p>模拟值是“设备ID + 日期”的确定性函数，重复生成同一天结果一致，便于核对。</p>
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*/
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@Slf4j
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@Service
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@RequiredArgsConstructor
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public class EnergyMeterDemoServiceImpl implements EnergyMeterDemoService {
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private final EnergyMeterDeviceMapper deviceMapper;
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private final EnergyMeterMeasurementMapper measurementMapper;
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@Override
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@Transactional(rollbackFor = Exception.class)
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public int generateGasDemo(LocalDate date) {
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if (date == null) {
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return 0;
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}
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LambdaQueryWrapper<EnergyMeterDevice> wrapper = new LambdaQueryWrapper<>();
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wrapper.eq(EnergyMeterDevice::getMeterType, EnergyMeterConstants.TYPE_GAS)
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.eq(EnergyMeterDevice::getSimulated, 1)
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.eq(EnergyMeterDevice::getEnabled, 1);
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List<EnergyMeterDevice> devices = deviceMapper.selectList(wrapper);
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if (devices.isEmpty()) {
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return 0;
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}
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int generated = 0;
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LocalDateTime measureTime = date.atStartOfDay();
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for (EnergyMeterDevice device : devices) {
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if (hasUsage(device.getId(), measureTime)) {
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// 数据已存在时只刷新采集时间，保证“最近采集/在线”反映最近一次自动生成
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deviceMapper.markCollectSuccess(device.getId(), EnergyMeterSupport.now());
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continue;
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}
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BigDecimal usage = simulatedUsage(device.getId(), date);
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BigDecimal previous = previousReading(device, measureTime);
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BigDecimal reading = previous.add(usage);
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EnergyMeterMeasurement usagePoint = new EnergyMeterMeasurement();
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usagePoint.setTenantId(device.getTenantId());
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usagePoint.setMeterId(device.getId());
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usagePoint.setMetricCode(EnergyMeterConstants.METRIC_GAS_USAGE);
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usagePoint.setGranularity(EnergyMeterConstants.GRANULARITY_DAY);
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usagePoint.setMeasureTime(measureTime);
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usagePoint.setMetricValue(usage);
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usagePoint.setUnit(EnergyMeterConstants.UNIT_GAS);
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usagePoint.setSourceApi(EnergyMeterConstants.SOURCE_MANUAL);
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usagePoint.setSourceRecordTime(measureTime);
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usagePoint.setCollectedAt(EnergyMeterSupport.now());
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usagePoint.setRemark("模拟数据：每日用量");
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EnergyMeterMeasurement readingPoint = new EnergyMeterMeasurement();
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readingPoint.setTenantId(device.getTenantId());
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readingPoint.setMeterId(device.getId());
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readingPoint.setMetricCode(EnergyMeterConstants.METRIC_GAS_READING);
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readingPoint.setGranularity(EnergyMeterConstants.GRANULARITY_POINT);
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readingPoint.setMeasureTime(measureTime);
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readingPoint.setMetricValue(reading);
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readingPoint.setUnit(EnergyMeterConstants.UNIT_GAS);
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readingPoint.setSourceApi(EnergyMeterConstants.SOURCE_MANUAL);
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readingPoint.setSourceRecordTime(measureTime);
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readingPoint.setCollectedAt(EnergyMeterSupport.now());
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readingPoint.setRemark("模拟数据：每日表码");
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measurementMapper.upsertBatch(List.of(usagePoint, readingPoint));
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// 采集时间按实际执行时间记录，而不是数据所属日期的 00:00
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deviceMapper.markCollectSuccess(device.getId(), EnergyMeterSupport.now());
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generated++;
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}
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log.info("气表演示数据生成完成 date={} 设备数={}", date, generated);
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return generated;
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}
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private boolean hasUsage(Long meterId, LocalDateTime measureTime) {
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LambdaQueryWrapper<EnergyMeterMeasurement> wrapper = new LambdaQueryWrapper<>();
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wrapper.eq(EnergyMeterMeasurement::getMeterId, meterId)
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.eq(EnergyMeterMeasurement::getMetricCode, EnergyMeterConstants.METRIC_GAS_USAGE)
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.eq(EnergyMeterMeasurement::getMeasureTime, measureTime);
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return measurementMapper.selectCount(wrapper) > 0;
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}
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/**
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* 上一期表码：取该日期之前的最近一条示值，没有就用设备起始表码。
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*/
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private BigDecimal previousReading(EnergyMeterDevice device, LocalDateTime measureTime) {
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EnergyMeterMeasurement previous = measurementMapper.selectPreviousPoint(device.getId(),
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EnergyMeterConstants.METRIC_GAS_READING, measureTime);
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if (previous != null && previous.getMetricValue() != null) {
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return previous.getMetricValue();
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}
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return device.getInitialReading() == null ? BigDecimal.ZERO : device.getInitialReading();
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}
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/**
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* 确定性模拟用量：按食品厂蒸煮/灭菌的实际用气量估算。
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*
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* <p>估算口径：蒸煮锅按 4~6 m³/h、每天 6~8 小时，单台约 25~35 m³/天；
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* 灭菌锅、小煮锅约 14~20 m³/天。基础值按设备区分，再叠加季节波动与噪点。</p>
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*/
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private BigDecimal simulatedUsage(Long meterId, LocalDate date) {
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long seed = meterId * 131L + date.toEpochDay();
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double base = 14 + (meterId % 5) * 5;
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double season = base * 0.1 * Math.sin(2 * Math.PI * date.getDayOfYear() / 365);
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double noise = ((seed * 37 % 200) / 200.0 - 0.5) * 3;
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double usage = Math.max(2, base + season + noise);
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return BigDecimal.valueOf(usage).setScale(2, RoundingMode.HALF_UP);
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}
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}
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