package com.se.nsl.service;
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import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
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import com.baomidou.mybatisplus.core.metadata.IPage;
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import com.baomidou.mybatisplus.core.metadata.OrderItem;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.bc.zarr.ZarrArray;
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import com.bc.zarr.ZarrGroup;
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import com.se.nsl.config.PropertiesConfig;
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import com.se.nsl.domain.po.Simu;
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import com.se.nsl.domain.vo.SimuResult;
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import com.se.nsl.domain.vo.SimuVo;
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import com.se.nsl.helper.StringHelper;
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import com.se.nsl.mapper.SimuMapper;
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import com.se.nsl.utils.CoordinateTransformer;
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import lombok.extern.slf4j.Slf4j;
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import org.gdal.gdal.Band;
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import org.gdal.gdal.Dataset;
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import org.gdal.gdal.gdal;
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import org.gdal.gdalconst.gdalconstConstants;
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import org.springframework.stereotype.Service;
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import ucar.ma2.InvalidRangeException;
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import javax.annotation.Resource;
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import java.io.File;
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import java.io.IOException;
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import java.time.Instant;
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import java.time.LocalDateTime;
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import java.time.ZoneId;
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import java.time.format.DateTimeFormatter;
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import java.util.Arrays;
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import java.util.List;
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@Slf4j
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@Service
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@SuppressWarnings("ALL")
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public class SimuService {
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public static final String TIF_EXTSION = ".tif";
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@Resource
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SimuMapper simuMapper;
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@Resource
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PropertiesConfig config;
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/**
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* 分页查询推演模拟
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*
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* @param pageNum 页码
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* @param pageSize 每页数量
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* @return 分页后的推演模拟
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*/
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public IPage<Simu> selectPage(SimuVo vo, int pageNum, int pageSize) {
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QueryWrapper<Simu> wrapper = getPageWrapper(vo, pageNum, pageSize);
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Page<Simu> page = new Page<>(pageNum, pageSize);
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page.addOrder(OrderItem.desc("id"));
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IPage<Simu> paged = simuMapper.selectPage(page, wrapper);
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return paged;
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}
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private QueryWrapper<Simu> getPageWrapper(SimuVo vo, int pageNum, int pageSize) {
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QueryWrapper<Simu> wrapper = new QueryWrapper<>();
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if (null != vo.getId()) {
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wrapper.eq("id", vo.getId());
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}
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if (!StringHelper.isEmpty(vo.getName())) {
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wrapper.like("lower(name)", vo.getName().trim().toLowerCase());
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}
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if (!StringHelper.isEmpty(vo.getServiceName())) {
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wrapper.like("service_name", vo.getServiceName().trim());
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}
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if (null != vo.getType()) {
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wrapper.eq("type", vo.getType());
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}
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if (null != vo.getAreaType()) {
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wrapper.eq("area_type", vo.getAreaType());
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}
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if (null != vo.getStatus()) {
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wrapper.eq("status", vo.getStatus());
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}
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return wrapper;
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}
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/**
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* 根据ID批量删除推演模拟
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*
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* @param ids 要删除的区域ID列表
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* @return 删除成功的记录数
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*/
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public int deleteByIds(List<Integer> ids) {
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return simuMapper.deleteBatchIds(ids);
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}
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/**
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* 新增推演模拟
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*
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* @param Simu 推演模拟对象
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* @return 新增成功的记录数
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*/
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public int insert(Simu simu) {
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return simuMapper.insert(simu);
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}
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public int inserts(List<Simu> list) {
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return simuMapper.inserts(list);
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}
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/**
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* 根据ID查询
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*
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* @param id ID
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* @return Simu
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*/
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public Simu selectById(Integer id) {
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return simuMapper.selectById(id);
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}
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/**
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* 修改推演模拟
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*
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* @param Simu 推演模拟对象
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* @return 修改成功的记录数
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*/
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public int updateById(Simu simu) {
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return simuMapper.updates(Arrays.asList(simu));
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}
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public SimuResult queryByPosition(double lon, double lat, long time, String serviceName) {
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//transform coordiante from 4326 to 4548
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double[] xy = CoordinateTransformer.transform(4326, 4548, lon, lat);
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// System.out.println(String.format("转换前的坐标：x:%s,y:%s", lon, lat));
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// System.out.println(String.format("转换后的坐标：x:%s,y:%s", xy[0], xy[1]));
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//read from zarr
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// return null;
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//read from tif file
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return queryByTif(xy, time, serviceName);
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}
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private SimuResult queryByZarr(double[] xy, long time, String serviceName) {
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double x = xy[0];
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double y = xy[1];
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String prefix = formatTime(time);
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File inPath = new File(config.getInPath());
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File tifDir = new File(inPath, serviceName + File.separator + "depth");
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int index = 0;
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File[] files = tifDir.listFiles();
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for (File file : files) {
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String name = file.getName();
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if (!name.endsWith(TIF_EXTSION)) continue;
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if (name.equals(prefix + TIF_EXTSION)) {
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break;
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}
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index++;
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}
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//TODO需要计算行列号
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int col = 0;
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int row = 0;
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File zarr = new File(inPath, serviceName + File.separator + "result.zarr");
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try {
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ZarrGroup group = ZarrGroup.open(zarr.toPath());
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ZarrArray depthArray = group.openArray("depth");
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Object object = depthArray.read();
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System.out.println(object);
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} catch (IOException | InvalidRangeException e) {
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throw new RuntimeException(e);
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}
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return null;
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}
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private SimuResult queryByTif(double[] xy, long time, String serviceName) {
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double x = xy[0];
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double y = xy[1];
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File inPath = new File(config.getInPath());
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String prefix = formatTime(time);
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String child = serviceName + File.separator + "depth" + File.separator + prefix + TIF_EXTSION;
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File tifFile = new File(inPath, child);
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if (!tifFile.exists()) {
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return null;
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}
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Dataset dataset = gdal.Open(tifFile.getAbsolutePath(), gdalconstConstants.GA_ReadOnly);
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// 获取地理变换参数（6元素数组）
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// [0]: 左上角X坐标, [1]: 像元宽度, [2]: X方向旋转,
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// [3]: 左上角Y坐标, [4]: Y方向旋转, [5]: 像元高度（负值表示Y轴向下）
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double[] geoTransform = dataset.GetGeoTransform();
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//计算栅格行列号
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int col = (int) ((x - geoTransform[0]) / geoTransform[1]);
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int row = (int) ((geoTransform[3] - y) / Math.abs(geoTransform[5]));
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int width = dataset.getRasterXSize();
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int height = dataset.getRasterYSize();
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if (col < 0 || col > width || row < 0 || row > height) {
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log.warn("行列号不在tif范围内");
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return null;
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}
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float depth = readPixelValue(dataset, col, row, 1);
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float velocity = calcVelocity(dataset, col, row);
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SimuResult result = new SimuResult();
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result.setDepth(depth);
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result.setVelocity(velocity);
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return result;
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}
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private float calcVelocity(Dataset dataset, int col, int row) {
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float x = readPixelValue(dataset, col, row, 2);
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float y = readPixelValue(dataset, col, row, 3);
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float velocity = 0f;
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if (Float.isNaN(x) && Float.isNaN(y)) {
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velocity = 0f;
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} else if (Float.isNaN(x)) {
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velocity = y;
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} else if (Float.isNaN(y)) {
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velocity = x;
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} else {
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velocity = (float) Math.sqrt(x * x + y * y);
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}
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return velocity;
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}
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private float readPixelValue(Dataset dataset, int col, int row, int bandNum) {
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Band band = dataset.GetRasterBand(bandNum);
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float[] values = new float[1];
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band.ReadRaster(col, row, 1, 1, values);
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return values[0];
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}
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private String formatTime(long time) {
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Instant instant = Instant.ofEpochMilli(time);
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LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
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DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMddHHmmss");
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return localDateTime.format(formatter);
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}
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}
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