package psdi.app.iface.comm;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.Charset;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class DownloadsFile {

    /**
     * 从Url中下载文件
     *
     * @param urlStr url的路径
     */
    public static File downloadByUrl(String urlStr, String savePath) {
        //  http://192.168.106.74:9000/mdm/ESBQUERYFILE/3b3bfced-961a-409c-b080-9a823e2bcf6d/HR_DEPARTMENT_all.zip
        File file = null;
        try {
            URL url = new URL(urlStr);
            URLConnection urlConnection = url.openConnection();
            HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;
            httpURLConnection.setConnectTimeout(1000 * 5);
            httpURLConnection.setRequestMethod("GET");
            httpURLConnection.setRequestProperty("Charset", "UTF-8");
            httpURLConnection.connect();
            // 建立链接从请求中获取数据
            BufferedInputStream bin = new BufferedInputStream(httpURLConnection.getInputStream());
            // 指定文件名称(有需求可以自定义)
            String fileFullName = urlStr.substring(urlStr.lastIndexOf("/") + 1);
            // 指定存放位置(有需求可以自定义)
            String path = savePath + File.separatorChar + fileFullName;
            file = new File(path);
            // 校验文件夹目录是否存在，不存在就创建一个目录
            if (!file.getParentFile().exists()) {
                file.getParentFile().mkdirs();
            }
            OutputStream out = new FileOutputStream(file);
            int size = 0;
            long len = 0;
            byte[] buf = new byte[2048];
            while ((size = bin.read(buf)) != -1) {
                len += size;
                out.write(buf, 0, size);
            }
            // 关闭资源
            bin.close();
            out.close();
            System.out.println("文件下载成功,文件大小：" + len / 1024 + "kb");
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("文件下载失败！");
        } finally {
            return file;
        }
    }

    //解压zip文件到制定目录下
    public boolean decompressZip(String zipPath, String descDir) {
        File zipFile = new File(zipPath);
        boolean flag = false;
        File pathFile = new File(descDir);
        if (!pathFile.exists()) {
            pathFile.mkdirs();
        }
        ZipFile zip = null;
        try {
            zip = new ZipFile(zipFile, Charset.forName("UTF-8"));//防止中文目录，乱码
            for (Enumeration entries = zip.entries(); entries.hasMoreElements(); ) {
                ZipEntry entry = (ZipEntry) entries.nextElement();
                String zipEntryName = entry.getName();
                System.out.println("------zipEntryName=" + zipEntryName);
                InputStream in = zip.getInputStream(entry);
                //指定解压后的文件夹+当前zip文件的名称
                String outPath = (descDir + zipEntryName).replace("/", File.separator);
                System.out.println("------outPath=" + outPath);
                //判断路径是否存在,不存在则创建文件路径
                File file = new File(outPath.substring(0, outPath.lastIndexOf(File.separator)));
                if (!file.exists()) {
                    file.mkdirs();
                }
                //判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
                if (new File(outPath).isDirectory()) {
                    continue;
                }
                OutputStream out = new FileOutputStream(outPath);
                byte[] buf1 = new byte[2048];
                int len;
                while ((len = in.read(buf1)) > 0) {
                    out.write(buf1, 0, len);
                }
                in.close();
                out.close();
            }
            flag = true;
            //必须关闭，要不然这个zip文件一直被占用着，要删删不掉，改名也不可以，移动也不行，整多了，系统还崩了。
            zip.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return flag;
    }

    //读取解压后的txt文本，是json格式
    public String readJsonFile(File jsonFile) {
        String jsonStr = "";
        try {
            //File jsonFile = new File(fileName);
            FileReader fileReader = new FileReader(jsonFile);
            Reader reader = new InputStreamReader(new FileInputStream(jsonFile), "utf-8");
            int ch = 0;
            StringBuffer sb = new StringBuffer();
            while ((ch = reader.read()) != -1) {
                sb.append((char) ch);
            }
            fileReader.close();
            reader.close();
//            jsonStr = sb.toString();
            return sb.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    //删除文件目录及目录下的文件
    public static Boolean deleteFile(File file) {
        if (file == null || !file.exists()) {
            System.out.println("文件不存在");
            return false;
        }
        //获取目录下子文件
        File[] files = file.listFiles();
        for (File f : files) {
            if (f.isDirectory()) {
                deleteFile(f);
            } else {
                f.delete();
            }
        }
        file.delete();
        return true;
    }
}