package com.se.nsl.service;

import cn.hutool.core.io.FileUtil;
import cn.hutool.json.JSONUtil;
import com.alibaba.fastjson.JSON;
import com.se.nsl.config.PropertiesConfig;
import com.se.nsl.domain.po.DataPo;
import com.se.nsl.domain.po.Simu;
import com.se.nsl.domain.po.SimuData;
import com.se.nsl.domain.vo.ConfigVo;
import com.se.nsl.helper.ComHelper;
import com.se.nsl.helper.StringHelper;
import com.se.nsl.helper.WebHelper;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.gdal.ogr.Geometry;
import org.gdal.ogr.ogr;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.sql.Timestamp;
import java.util.Date;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

@Slf4j
@Service
@SuppressWarnings("ALL")
public class ResolveService {
    @Resource
    SimuService simuService;

    @Resource
    PropertiesConfig config;
    @Autowired
    private UwService uwService;

    public int start(Simu simu) {
        Date now = new Date();
        String date = StringHelper.YMDHMS2_FORMAT.format(now);

        // 将WKT转换为Geometry对象
        Geometry geom = Geometry.CreateFromWkt(simu.getGeom());
        if (geom.GetGeometryType() == ogr.wkbMultiPolygon) {
            geom = geom.GetGeometryRef(0);
        }
        double[] envelope = new double[4];
        geom.GetEnvelope(envelope);

        SimuData data = JSON.parseObject(simu.getData(), SimuData.class);
        data.setInPath(date);
        data.setOutPath(date);
        data.setEpsg(4548);
        data.setEnvelope(envelope);

        simu.setData(JSON.toJSONString(data));
        simu.setServiceName(date);
        simu.setStatus(1); // 0-创建仿真，1-预处理，2-分析中，10-完成，20-出错
        simu.setUpdateTime(new Timestamp(now.getTime()));

        int rows = simuService.updateById(simu);
        if (rows > 0) {
            asyncCall(simu);
        }

        return rows;
    }

    private void asyncCall(Simu simu) {
        ExecutorService executor = Executors.newSingleThreadExecutor();
        executor.execute(new Runnable() {
            @Override
            @SneakyThrows
            public void run() {
                cope(simu);
            }
        });
        executor.shutdown();
    }

    private void cope(Simu simu) {
        try {
            DataPo data = JSONUtil.toBean(simu.getData(), DataPo.class);

            update(simu, 1, "开始");

            initArgs(data);
            String rs = callUwSolver(data);
            //gedbService.copeVectors(token, data, db);

            //update(simu, 3, null);
            //gedbService.copeDem(token, data);

            //update(simu, 4, null);
            //uwService.createRainFile(data);

            update(simu, 10, "完成");
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            update(simu, 20, ex.getMessage());
        }
    }

    private void update(Simu simu, int status, String rs) {
        simu.setStatus(status);
        if (null != rs) simu.setResult(rs);
        simu.setUpdateTime(WebHelper.getCurrentTimestamp());

        simuService.updateById(simu);
    }

    /**
     * 初始化参数
     */
    private void initArgs(DataPo data) throws IOException {
        String inPath = config.getInPath() + File.separator + data.getInPath();
        createDir(inPath);
        createDir(inPath + File.separator + "depth");
        createDir(inPath + File.separator + "velocity");
        createDir(config.getOutPath() + File.separator + data.getOutPath());

        // 临时复制高程tif，以后需要自行切割
        File uwBat = new File(config.getUwSolverBat());
        String sourceTif = uwBat.getParent() + File.separator + "data" + File.separator + "Hillzone.tif";
        String targetTif = inPath + File.separator + config.getDemFile();
        Files.copy(Paths.get(sourceTif), Paths.get(targetTif), StandardCopyOption.REPLACE_EXISTING);
    }

    private void createDir(String path) {
        File f = new File(path);
        if (f.exists() && f.isDirectory()) {
            FileUtil.del(f);
        }
        f.mkdirs();
    }

    /**
     * 调用UWSolver
     */
    private String callUwSolver(DataPo data) throws Exception {
        File uwBat = new File(config.getUwSolverBat());

        ConfigVo vo = new ConfigVo(data.getDuration(), config.getSaveFrames());
        //String configFile = uwBat.getParent() + File.separator + data.getInPath() + ".json";
        String configFile = config.getInPath() + File.separator + data.getInPath() + File.separator + data.getInPath() + ".json";
        ComHelper.writeJson(configFile, JSON.toJSONString(vo));

        String cmd = String.format("%s %s", config.getUwSolverBat(), configFile);

        return callBat(cmd);
    }

    private String callZarr2tif(DataPo data) throws Exception {
        String cmd = "";

        return callBat(cmd);
    }

    private String callBat(String cmd) {
        try {
            ProcessBuilder pb = new ProcessBuilder("cmd", "/c", cmd);
            pb.redirectErrorStream(true); // 合并错误流到标准输出

            Process process = pb.start();
            process.getOutputStream().close();

            /*StringBuilder sb = new StringBuilder();
            try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream(), "GBK"))) {
                String line;
                while ((line = reader.readLine()) != null) {
                    System.out.println(line);
                    sb.append(line);
                }
            }*/

            int exitCode = process.waitFor();

            return "ok"; // sb.toString();
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            return null;
        }
    }
}