package com.steerinfo.dil.util;

import com.steerinfo.framework.utils.io.IOUtils;
import com.steerinfo.framework.utils.text.Charsets;
import org.apache.commons.net.ftp.*;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.Base64;

/**
 * POIExcelToHtml 文件转换：
 *
 * @author generator
 * @version 1.0-SNAPSHOT 2021-08-09 18:06
 * 类描述
 * 修订历史：
 * 日期：2021-08-09
 * 作者：shadow
 * 参考：
 * 描述：
 * @Copyright 湖南视拓信息技术股份有限公司. All rights reserved.
 * @see null
 */
@Component
public class FtpFileUtil {
    /**
     * ftp服务器ip地址
     */

    // String FTP_ADDRESS;
    private String FTP_ADDRESS = "172.16.90.238";

    /**
     * 端口号
     */

    //Integer FTP_PORT;
    private Integer FTP_PORT = 21;
    /**
     * 用户名
     */

    private String FTP_USERNAME = "ftptest";
    /**
     * 密码
     */

    private String FTP_PASSWORD = "at286315";

    private FTPClient ftpClient = new FTPClient();
    private static final String SPOT = ".";

    /**
     * 上传文件
     *
     * @param filePath    文件路径
     * @param filename    文件名称
     * @param basePath    上级目录
     * @param inputStream 文件输入流
     * @return 是否成功
     */
    public boolean uploadFile(String filePath, String filename, String basePath, InputStream inputStream) {
        boolean result = false;
        try {
            // 连接FTP服务器
            ftpClient.connect(FTP_ADDRESS, FTP_PORT);
            ftpClient.login(FTP_USERNAME, FTP_PASSWORD);
            int reply;
            ftpClient.enterLocalPassiveMode();
            reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                return false;
            }
            //切换到上传目录
            boolean changed = ftpClient.changeWorkingDirectory(filePath);
            if (!changed) {
                //如果目录不存在创建目录
                String[] dirs = filePath.split("/");
                String tempPath = basePath;
                for (String dir : dirs) {
                    if (null == dir || "".equals(dir)) {
                        continue;
                    }
                    tempPath += "/" + dir;
                    if (!ftpClient.makeDirectory(tempPath)) {
                        return false;
                    } else {
                        ftpClient.changeWorkingDirectory(tempPath);
                    }
                }
            }
            System.out.println("当前目录" + ftpClient.printWorkingDirectory());
            //设置为被动模式

            //设置上传文件的类型为二进制类型
            ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
            //上传文件
            if (!ftpClient.storeFile(filename, inputStream)) {
                System.out.println("上传文件失败");
                return false;
            }
            ftpClient.logout();
            result = true;
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (ftpClient.isConnected()) {
                try {
                    inputStream.close();
                    ftpClient.disconnect();
                } catch (IOException ioe) {
                    ioe.printStackTrace();
                }
            }
        }
        return result;
    }

    /***
     * 上传
     * @param buffIn 文件流
     * @param filePath 文件路径
     * @param fileName 文件名称
     * @param needDelete 是否删除
     * @return 是否成功
     * @throws FTPConnectionClosedException ftp错误
     * @throws IOException io流错误
     * @throws Exception 普通错误
     */
    public boolean uploadToFtp(InputStream buffIn, String filePath, String fileName, boolean needDelete)
            throws FTPConnectionClosedException, IOException, Exception {
        boolean result;
        try {
            //建立连接
            this.connectToServer();
            ftpClient.changeWorkingDirectory("/");
            this.setFileType(FTP.BINARY_FILE_TYPE);
            int reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                throw new IOException("failed to connect to the FTP Server:" + FTP_ADDRESS);
            }
            //进入文件目录
            boolean changeWork = ftpClient.changeWorkingDirectory(filePath);
            if (!changeWork) {
                if (!createDirectory(filePath)) {
                    return false;
                }
            }
            result = ftpClient.storeFile(fileName, buffIn);
            if (needDelete) {
                ftpClient.deleteFile(fileName);
            }
            // 输出操作结果信息
            if (result) {
                System.out.println("uploadToFtp INFO: upload file  to ftp : succeed!");
            } else {
                System.out.println("uploadToFtp INFO: upload file  to ftp : failed!");
            }
        } catch (FTPConnectionClosedException e) {
            System.out.println("ftp连接被关闭！");
            throw e;
        } catch (Exception e) {
            System.out.println("ERR : upload file  to ftp : failed! ");
            throw e;
        } finally {
            try {
                if (buffIn != null) {
                    buffIn.close();
                }
            } catch (Exception e) {
                System.out.println("ftp关闭输入流时失败！");
            }
            if (ftpClient.isConnected()) {
                closeConnect();
            }
        }
        return result;
    }

    /***
     * 预览
     * @param fileName 文件名
     * @param filePath 文件路径
     * @return 返回HTML
     * @throws IOException io流错误
     */
    public String downloadFile(String fileName, String filePath) throws IOException {
        InputStream inputStream;
        String data = fileName + "预览失败";
        String workhtml = null;
        File temp = File.createTempFile("temp", ".temp");
        try {
            this.connectToServer();
            // 设置传输二进制文件
            this.setFileType(FTP.BINARY_FILE_TYPE);
            ftpClient.enterLocalPassiveMode();
            int reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                throw new IOException("failed to connect to the FTP Server:" + FTP_ADDRESS);
            }

            String directory = filePath.substring(0, filePath.lastIndexOf("/") + 1);
            // 进入文件所在目录，注意编码格式，以能够正确识别中文目录
            boolean cdStatus = ftpClient.changeWorkingDirectory(directory);
            if (!cdStatus) {
                return data;
            }
            String file = filePath.substring(filePath.lastIndexOf("/") + 1);
            // 检验文件是否存在
            inputStream = ftpClient.retrieveFileStream(file);

            String suffixName;
            if (inputStream != null) {
                if (fileName != null && fileName.contains(SPOT)) {
                    POIWordToHtml poiWordToHtml = new POIWordToHtml();
                    suffixName = fileName.substring(fileName.indexOf(".") + 1);
                    switch (suffixName) {
                        case "docx":
                            data = poiWordToHtml.readWordImgToHtml(inputStream);
                            break;
                        case "doc":
                            data = poiWordToHtml.docToHtml(inputStream);
                            break;

                        case "xlsx":
                        case "xls":
                            data = POIExcelToHtml.excelToHtml(inputStream);
                            break;
                        case "pptx":
                        case "ppt":
                            data = POIPptToHtml.pptToHtml(inputStream, suffixName);
                            break;
                        case "jpg":
                        case "gif":
                        case "png":
                        case "jpeg":
                        case "jpe":
                            ByteArrayOutputStream stream = new ByteArrayOutputStream();
                            IOUtils.copy(inputStream, stream);
                            String imgStr = Base64.getEncoder().encodeToString(stream.toByteArray());
                            data = "<img style='width:100%' src=" + "\"data:image/" + suffixName + ";base64," + imgStr + "\"" + "/>";
                            stream.close();
                            break;
                        case "txt":
                            ByteArrayOutputStream txtStream = new ByteArrayOutputStream();
                            IOUtils.copy(inputStream, txtStream);
                            data = txtStream.toString();
                            break;
                        default:
                            data = fileName + "文件暂时不支持预览。";
                            break;
                    }
                }
                inputStream.close();
                ftpClient.completePendingCommand();
            }
        } catch (FTPConnectionClosedException e) {
            System.out.println("ftp连接被关闭！");
            throw e;
        } catch (Exception e) {
            System.out.println("ERR : upload file " + fileName + " from ftp : failed!" + e.getMessage());
        } finally {
            if (ftpClient.isConnected()) {
                closeConnect();
            }
        }
        return data;
    }

    /**
     * 下载
     *
     * @param response 响应头
     * @param fileName 文件名
     * @param filePath 文件路径
     * @return 返回下载是否成功
     */
    public boolean download(HttpServletResponse response, String fileName, String filePath) {
        boolean flag = false;
        try {
            this.connectToServer();
            // 设置传输二进制文件
            this.setFileType(FTP.BINARY_FILE_TYPE);
            this.ftpClient.enterLocalPassiveMode();
            int reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                throw new IOException("failed to connect to the FTP Server:" + FTP_ADDRESS);
            }
            String transferName = new String(fileName.getBytes(Charsets.UTF_8), Charsets.ISO_8859_1);
            String directory = filePath.substring(0, filePath.lastIndexOf("/") + 1);
            String file = filePath.substring(filePath.lastIndexOf("/") + 1);
            // 进入文件所在目录，注意编码格式，以能够正确识别中文目录
            ftpClient.changeWorkingDirectory(directory);
            response.setCharacterEncoding("UTF-8");
            response.setContentType("multipart/form-data;charset=UTF-8");
            response.setHeader("Content-Disposition", "attachment; filename=\"" + transferName + "\"");
            FTPFile[] fs = ftpClient.listFiles();
            for (FTPFile ff : fs) {
                if (ff.getName().equals(file)) {
                    OutputStream os = response.getOutputStream();
                    flag = ftpClient.retrieveFile(ff.getName(), os);
                    os.flush();
                    os.close();
                    break;
                }
            }
            closeConnect();

        } catch (FTPConnectionClosedException ignored) {

        } catch (Exception e) {
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 下载返回流
     *
     * @param fileName 文件名称
     * @param filePath 文件路径
     * @return 返回是否成功
     */
    public ByteArrayOutputStream download(String fileName, String filePath) {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        try {
            this.connectToServer();
            // 设置传输二进制文件
            this.setFileType(FTP.BINARY_FILE_TYPE);
            ftpClient.enterLocalPassiveMode();
            int reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                throw new IOException("failed to connect to the FTP Server:" + FTP_ADDRESS);
            }
            String directory = filePath.substring(0, filePath.lastIndexOf("/") + 1);
            String file = filePath.substring(filePath.lastIndexOf("/") + 1);
            // 进入文件所在目录，注意编码格式，以能够正确识别中文目录
            ftpClient.changeWorkingDirectory(directory);
            FTPFile[] fs = ftpClient.listFiles();
            for (FTPFile ff : fs) {
                if (ff.getName().equals(file)) {
                    os.close();
                    break;
                }
            }
            closeConnect();
        } catch (FTPConnectionClosedException ignored) {
        } catch (Exception e) {
            e.printStackTrace();
        }

        return os;
    }

    public boolean deleteFile(String filePath) throws Exception {
        boolean result;
        try {
            //建立连接
            this.connectToServer();
            ftpClient.changeWorkingDirectory("/");
            this.setFileType(FTP.BINARY_FILE_TYPE);
            int reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                throw new IOException("failed to connect to the FTP Server:" + FTP_ADDRESS);
            }
            String directory = filePath.substring(0, filePath.lastIndexOf("/") + 1);
            String fileName = filePath.substring(filePath.lastIndexOf("/") + 1);
            //进入文件目录
            boolean changeWork = ftpClient.changeWorkingDirectory(directory);
            if (!changeWork) {
                return false;
            }
            result = ftpClient.deleteFile(fileName);
        } catch (FTPConnectionClosedException e) {
            System.out.println("ftp连接被关闭！");
            throw e;
        } catch (Exception e) {
            System.out.println("ERR : delete file  to ftp : failed! ");
            throw e;
        } finally {
            if (ftpClient.isConnected()) {
                closeConnect();
            }
        }
        return result;
    }

    /***
     * 建立连接
     * @throws FTPConnectionClosedException ftp错误
     * @throws Exception 普通错误
     */
    private void connectToServer() throws FTPConnectionClosedException, Exception {
        if (!ftpClient.isConnected()) {
            int reply;
            try {
                //建立连接
                ftpClient = new FTPClient();
                //ftpClient.setControlEncoding("GBK");//windows default服务器gbk
                ftpClient.setControlEncoding("UTF-8");//linux default UTF-8
                ftpClient.connect(FTP_ADDRESS, FTP_PORT);
                ftpClient.login(FTP_USERNAME, FTP_PASSWORD);
                ftpClient.enterLocalPassiveMode();
                reply = ftpClient.getReplyCode();
                if (!FTPReply.isPositiveCompletion(reply)) {
                    ftpClient.disconnect();
                    System.out.println("connectToServer FTP server refused connection.");
                }
            } catch (FTPConnectionClosedException ex) {
                System.out.println("没有连接数！there are too many connected users,please try later");
                throw ex;
            } catch (Exception e) {
                System.out.println("登录ftp服务器失败");
                throw e;
            }
        }
    }

    /**
     * 设置传输文件类型
     *
     * @param fileType 文件类型
     */
    private void setFileType(int fileType) {
        try {
            ftpClient.setFileType(fileType);
        } catch (Exception e) {
            System.out.println("ftp设置传输文件的类型时失败！");

        }
    }

    /**
     * 关闭连接
     */
    public void closeConnect() {
        try {
            if (ftpClient != null) {
                ftpClient.logout();
                ftpClient.disconnect();
            }
        } catch (Exception e) {
            System.out.println("ftp连接关闭失败！");
        }
    }

    /**
     * 创建文件夹
     */
    public boolean createDirectory(String directory) {
        try {
            ftpClient.changeWorkingDirectory("/");
            String[] dirs = directory.split("/");
            String tempPath = "";
            for (String dir : dirs) {
                if (null == dir || "".equals(dir)) {
                    continue;
                }
                tempPath += "/" + dir;
                if (!ftpClient.makeDirectory(tempPath)) {
                    if (!ftpClient.changeWorkingDirectory(tempPath)) {
                        return false;
                    }
                } else {
                    ftpClient.changeWorkingDirectory(tempPath);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return true;
    }
}