package com.se.simu.service;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.io.FileUtil;
import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.metadata.OrderItem;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.se.simu.domain.dto.GeDb;
import com.se.simu.domain.dto.GeLayer;
import com.se.simu.domain.po.DataPo;
import com.se.simu.domain.po.SimuPo;
import com.se.simu.domain.vo.CreateSimuVo;
import com.se.simu.domain.vo.SimuVo;
import com.se.simu.helper.StringHelper;
import com.se.simu.helper.WebHelper;
import com.se.simu.mapper.SimuMapper;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import javax.annotation.Resource;
import java.io.File;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 仿真服务类
 *
 * @author WWW
 * @date   2024-09-18
 */
@Slf4j
@Service
@SuppressWarnings("ALL")
public class SimuService {
    @Value("${sys.path.in}")
    String inPath;

    @Value("${sys.path.out}")
    String outPath;

    @Resource
    SimuMapper simuMapper;

    @Resource
    GedbService gedbService;

    /**
     * 获取
     */
    public IPage<SimuPo> get(SimuVo vo) {
        QueryWrapper<SimuPo> wrapper = getPageWrapper(vo);

        Page<SimuPo> page = new Page<>(vo.getPageIndex(), vo.getPageSize());
        page.addOrder(OrderItem.desc("id"));

        IPage<SimuPo> paged = simuMapper.selectPage(page, wrapper);

        return paged;
    }

    private QueryWrapper<SimuPo> getPageWrapper(SimuVo vo) {
        QueryWrapper<SimuPo> wrapper = new QueryWrapper<>();
        if (null != vo.getId()) {
            wrapper.eq("id", vo.getId());
        }
        if (null != vo.getPid()) {
            wrapper.eq("pid", vo.getPid());
        }
        if (null != vo.getNum()) {
            wrapper.eq("num", vo.getNum());
        }
        if (!StringUtils.isEmpty(vo.getName())) {
            wrapper.like("lower(name)", vo.getName().trim().toLowerCase());
        }
        if (!CollUtil.isEmpty(vo.getStatus())) {
            wrapper.in("status", vo.getStatus());
        }

        return wrapper;
    }

    /**
     * 删除
     */
    public int del(List<Integer> ids) {
        List<SimuPo> list = simuMapper.selectBatchIds(ids);
        if (null != list && list.size() > 0) {
            for (SimuPo po : list) {
                try {
                    if (StringHelper.isEmpty(po.getData())) continue;

                    DataPo dp = JSONUtil.toBean(po.getData(), DataPo.class);
                    if (null == dp) continue;

                    delDir(inPath + File.separator + dp.getInPath());
                    delDir(outPath + File.separator + dp.getOutPath());
                } catch (Exception ex) {
                    log.error(ex.getMessage(), ex);
                }
            }
        }

        return simuMapper.deleteBatchIds(ids);
    }

    private boolean delDir(String dir) {
        File file = new File(dir);
        if (!file.exists() || !file.isDirectory()) {
            return false;
        }

        return FileUtil.del(dir);
    }

    public Integer getMaxId() {
        return simuMapper.selectMaxId();
    }

    public SimuPo getSimuByPid(Integer pid) {
        QueryWrapper<SimuPo> wrapper = new QueryWrapper<>();
        wrapper.eq("pid", pid);

        return simuMapper.selectOne(wrapper);
    }

    public boolean create(CreateSimuVo vo) {
        DataPo data = BeanUtil.copyProperties(vo, DataPo.class);
        data.setPath(vo.getName(), vo.getName());
        initPath(data);

        SimuPo simu = new SimuPo(vo.getNum(), vo.getPid(), vo.getName(), JSONUtil.toJsonStr(data), 0, vo.getBak());

        int rows = simuMapper.insert(simu);
        if (rows > 0) {
            asyncCall(simu);
        }

        return rows > 0;
    }

    private void initPath(DataPo data) {
        createDir(inPath + File.separator + data.getInPath());
        createDir(outPath + File.separator + data.getOutPath());
    }

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

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

    /**
     * 处理，状态：0-创建仿真，1-连接GEDB库，2-下载空间数据，3-下载高程数据，4-模拟内涝仿真，5-处理仿真数据，10-完成，-10-出错
     */
    private void scope(SimuPo simu) {
        try {
            DataPo data = JSONUtil.toBean(simu.getData(), DataPo.class);

            update(simu, 1, null);
            String token = gedbService.getToken();
            GeDb db = gedbService.connectGedb(token, data);
            simu.setData(JSONUtil.toJsonStr(data));

            update(simu, 2, null);
            gedbService.copeVectors(token, data, db);

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

            update(simu, 4, null);
            // 模拟内涝仿真

            //update(simu, 5, null);
            // 处理仿真数据

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

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

        simuMapper.updateById(simu);
    }
}