package com.lf.server.service.show;

import com.lf.server.entity.all.HttpStatus;
import com.lf.server.entity.ctrl.MarkJsonEntity;
import com.lf.server.entity.show.MarkEntity;
import com.lf.server.entity.sys.UserEntity;
import com.lf.server.helper.*;
import com.lf.server.mapper.show.MarkMapper;
import com.lf.server.service.data.UploaderService;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestBody;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

/**
 * 标绘
 * @author WWW
 */
@Service
public class MarkService implements MarkMapper {
    @Autowired
    MarkMapper markMapper;

    @Autowired
    PathHelper pathHelper;

    @Override
    public Integer selectCount(Integer uid) {
        return markMapper.selectCount(uid);
    }

    @Override
    public List<MarkEntity> selectByPage(Integer uid, Integer limit, Integer offset) {
        return markMapper.selectByPage(uid, limit, offset);
    }

    @Override
    public List<MarkEntity> selectAll() {
        return markMapper.selectAll();
    }

    @Override
    public MarkEntity selectById(int id) {
        return markMapper.selectById(id);
    }

    @Override
    public Integer insert(MarkEntity entity) {
        return markMapper.insert(entity);
    }

    @Override
    public Integer inserts(List<MarkEntity> list) {
        return markMapper.inserts(list);
    }

    @Override
    public Integer delete(int id) {
        return markMapper.delete(id);
    }

    @Override
    public Integer deletes(List<Integer> ids) {
        return markMapper.deletes(ids);
    }

    @Override
    public Integer update(MarkEntity entity) {
        return markMapper.update(entity);
    }

    @Override
    public Integer updates(List<MarkEntity> list) {
        return markMapper.updates(list);
    }

    public void downloadShp(UserEntity ue, List<MarkJsonEntity> list, HttpServletRequest req, HttpServletResponse res) throws Exception {
        String parent = pathHelper.getTempPath(ue.getId());
        String path = getShpDir(ue, parent);

        List<MarkJsonEntity> points = getMarkByType(list, "POINT");
        if (points.size() > 0) {
            String pointFile = GdalHelper.createShp(points, path, "POINT");
        }
        List<MarkJsonEntity> lines = getMarkByType(list, "LINESTRING");
        if (lines.size() > 0) {
            String lineFile = GdalHelper.createShp(lines, path, "LINESTRING");
        }
        List<MarkJsonEntity> polygons = getMarkByType(list, "POLYGON");
        if (polygons.size() > 0) {
            String polygonFile = GdalHelper.createShp(polygons, path, "POLYGON");
        }

        File[] files = new File(path).listFiles();
        if (files == null || files.length == 0) {
            WebHelper.write2Page(res, WebHelper.getErrJson(HttpStatus.BAD_REQUEST, "Shp文件生成失败"));
            return;
        }

        String zip = getZip(parent);
        ZipHelper.zip(zip, parent);
        download(res, zip);
    }

    private String getShpDir(UserEntity ue, String parent) {
        String path = parent + File.separator + WebHelper.getRandomInt(100000, 1000000);

        File file = new File(path);
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }

        return path;
    }

    private List<MarkJsonEntity> getMarkByType(List<MarkJsonEntity> list, String type) {
        List<MarkJsonEntity> rs = new ArrayList<MarkJsonEntity>();
        for (MarkJsonEntity mark : list) {
            if (StringHelper.isEmpty(mark.getWkt())) {
                continue;
            }
            if (mark.getWkt().indexOf(type) > -1) {
                rs.add(mark);
            }
        }

        return rs;
    }

    private String getZip(String parent) {
        String path = parent + File.separator + WebHelper.getRandomInt(100000, 1000000) + ".zip";

        File file = new File(path);
        if (file.exists() && !file.isDirectory()) {
            file.delete();
        }

        return path;
    }

    private void download(HttpServletResponse res, String file) throws Exception {
        String fileName = URLEncoder.encode(FileHelper.getFileName(file), "UTF-8");

        // 设置响应头中文件的下载方式为附件方式，以及设置文件名
        res.setHeader("Content-Disposition", "attachment; filename=" + fileName);
        // 设置响应头的编码格式为UTF-8
        res.setCharacterEncoding("UTF-8");

        // 通过response对象设置响应数据格式(如："text/plain; charset=utf-8")
        String ext = FileHelper.getExtension(file);
        String mime = FileHelper.getMime(ext);
        res.setContentType(mime);

        // 通过response对象，获取到输出流
        ServletOutputStream outputStream = res.getOutputStream();
        // 定义输入流，通过输入流读取文件内容
        FileInputStream fileInputStream = new FileInputStream(file);

        int len = 0;
        byte[] bytes = new byte[1024];
        while ((len = fileInputStream.read(bytes)) != -1) {
            // 通过输入流读取文件数据，然后通过上述的输出流写回浏览器
            outputStream.write(bytes, 0, len);
            outputStream.flush();
        }

        // 关闭资源
        outputStream.close();
        fileInputStream.close();
    }
}