///*
// * Licensed to the Apache Software Foundation (ASF) under one or more
// * contributor license agreements.  See the NOTICE file distributed with
// * this work for additional information regarding copyright ownership.
// * The ASF licenses this file to You under the Apache License, Version 2.0
// * (the "License"); you may not use this file except in compliance with
// * the License.  You may obtain a copy of the License at
// *
// *    http://www.apache.org/licenses/LICENSE-2.0
// *
// * Unless required by applicable law or agreed to in writing, software
// * distributed under the License is distributed on an "AS IS" BASIS,
// * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// * See the License for the specific language governing permissions and
// * limitations under the License.
// */
//package org.apache.dolphinscheduler.alert.utils;
//
//import org.apache.dolphinscheduler.alert.template.AlertTemplate;
//import org.apache.dolphinscheduler.alert.template.AlertTemplateFactory;
//import org.apache.dolphinscheduler.common.enums.ShowType;
//import org.apache.commons.mail.EmailException;
//import org.apache.commons.mail.HtmlEmail;
//import org.apache.dolphinscheduler.common.utils.CollectionUtils;
//import org.apache.dolphinscheduler.common.utils.StringUtils;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
//
//import javax.mail.*;
//import javax.mail.internet.*;
//import java.io.*;
//import java.util.*;
//
//
///**
// * mail utils
// */
//public class MailUtils {
//
//    public static final Logger logger = LoggerFactory.getLogger(MailUtils.class);
//
//    public static final String MAIL_PROTOCOL = PropertyUtils.getString(Constants.MAIL_PROTOCOL);
//
//    public static final String MAIL_SERVER_HOST = PropertyUtils.getString(Constants.MAIL_SERVER_HOST);
//
//    public static final Integer MAIL_SERVER_PORT = PropertyUtils.getInt(Constants.MAIL_SERVER_PORT);
//
//    public static final String MAIL_SENDER = PropertyUtils.getString(Constants.MAIL_SENDER);
//
//    public static final String MAIL_USER = PropertyUtils.getString(Constants.MAIL_USER);
//
//    public static final String MAIL_PASSWD = PropertyUtils.getString(Constants.MAIL_PASSWD);
//
//    public static final Boolean MAIL_USE_START_TLS = PropertyUtils.getBoolean(Constants.MAIL_SMTP_STARTTLS_ENABLE);
//
//    public static final Boolean MAIL_USE_SSL = PropertyUtils.getBoolean(Constants.MAIL_SMTP_SSL_ENABLE);
//
//    public static final String xlsFilePath = PropertyUtils.getString(Constants.XLS_FILE_PATH,"/tmp/xls");
//
//    public static final String STARTTLS_ENABLE = PropertyUtils.getString(Constants.MAIL_SMTP_STARTTLS_ENABLE);
//
//    public static final Boolean SSL_ENABLE = PropertyUtils.getBoolean(Constants.MAIL_SMTP_SSL_ENABLE);
//
//    public static final String SSL_TRUST = PropertyUtils.getString(Constants.MAIL_SMTP_SSL_TRUST);
//
//    public static final AlertTemplate alertTemplate = AlertTemplateFactory.getMessageTemplate();
//
//    //Solve the problem of messy Chinese name in excel attachment
//    static {
//        System.setProperty("mail.mime.splitlongparameters","false");
//    }
//
//    /**
//     * send mail to receivers
//     * @param receivers the receiver list
//     * @param title the title
//     * @param content the content
//     * @param showType the show type
//     * @return the result map
//     */
//    public static Map<String,Object> sendMails(Collection<String> receivers, String title, String content,String showType) {
//        return sendMails(receivers, null, title, content, showType);
//    }
//
//    /**
//     * send mail
//     * @param receivers the receiver list
//     * @param receiversCc cc list
//     * @param title the title
//     * @param content the content
//     * @param showType the show type
//     * @return the send result
//     */
//    public static Map<String,Object> sendMails(Collection<String> receivers, Collection<String> receiversCc, String title, String content, String showType) {
//        Map<String,Object> retMap = new HashMap<>();
//        retMap.put(Constants.STATUS, false);
//
//        // if there is no receivers && no receiversCc, no need to process
//        if (CollectionUtils.isEmpty(receivers) && CollectionUtils.isEmpty(receiversCc)) {
//            return retMap;
//        }
//
//        receivers.removeIf(StringUtils::isEmpty);
//
//        if (showType.equals(ShowType.TABLE.getDescp()) || showType.equals(ShowType.TEXT.getDescp())) {
//            // send email
//            HtmlEmail email = new HtmlEmail();
//
//            try {
//                Session session = getSession();
//                email.setMailSession(session);
//                email.setFrom(MAIL_SENDER);
//                email.setCharset(Constants.UTF_8);
//                if (CollectionUtils.isNotEmpty(receivers)){
//                    // receivers mail
//                    for (String receiver : receivers) {
//                        email.addTo(receiver);
//                    }
//                }
//
//                if (CollectionUtils.isNotEmpty(receiversCc)){
//                    //cc
//                    for (String receiverCc : receiversCc) {
//                        email.addCc(receiverCc);
//                    }
//                }
//                // sender mail
//                return getStringObjectMap(title, content, showType, retMap, email);
//            } catch (Exception e) {
//                handleException(receivers, retMap, e);
//            }
//        }else if (showType.equals(ShowType.ATTACHMENT.getDescp()) || showType.equals(ShowType.TABLEATTACHMENT.getDescp())) {
//            try {
//
//                String partContent = (showType.equals(ShowType.ATTACHMENT.getDescp()) ? "Please see the attachment " + title + Constants.EXCEL_SUFFIX_XLS : htmlTable(content,false));
//
//                attachment(receivers,receiversCc,title,content,partContent);
//
//                retMap.put(Constants.STATUS, true);
//                return retMap;
//            }catch (Exception e){
//                handleException(receivers, retMap, e);
//                return retMap;
//            }
//        }
//        return retMap;
//
//    }
//
//    /**
//     * html table content
//     * @param content the content
//     * @param showAll if show the whole content
//     * @return the html table form
//     */
//    private static String htmlTable(String content, boolean showAll){
//        return alertTemplate.getMessageFromTemplate(content,ShowType.TABLE,showAll);
//    }
//
//    /**
//     * html table content
//     * @param content the content
//     * @return the html table form
//     */
//    private static String htmlTable(String content){
//        return htmlTable(content,true);
//    }
//
//    /**
//     * html text content
//     * @param content the content
//     * @return text in html form
//     */
//    private static String htmlText(String content){
//        return alertTemplate.getMessageFromTemplate(content,ShowType.TEXT);
//    }
//
//    /**
//     * send mail as Excel attachment
//     * @param receivers the receiver list
//     * @param title the title
//     * @throws Exception
//     */
//    private static void attachment(Collection<String> receivers,Collection<String> receiversCc,String title,String content,String partContent)throws Exception{
//        MimeMessage msg = getMimeMessage(receivers);
//
//        attachContent(receiversCc, title, content,partContent, msg);
//    }
//
//    /**
//     * get MimeMessage
//     * @param receivers receivers
//     * @return the MimeMessage
//     * @throws MessagingException
//     */
//    private static MimeMessage getMimeMessage(Collection<String> receivers) throws MessagingException {
//
//        // 1. The first step in creating mail: creating session
//        Session session = getSession();
//        // Setting debug mode, can be turned off
//        session.setDebug(false);
//
//        // 2. creating mail: Creating a MimeMessage
//        MimeMessage msg = new MimeMessage(session);
//        // 3. set sender
//        msg.setFrom(new InternetAddress(MAIL_SENDER));
//        // 4. set receivers
//        for (String receiver : receivers) {
//            msg.addRecipients(Message.RecipientType.TO, InternetAddress.parse(receiver));
//        }
//        return msg;
//    }
//
//    /**
//     * get session
//     *
//     * @return the new Session
//     */
//    private static Session getSession() {
//        Properties props = new Properties();
//        props.setProperty(Constants.MAIL_HOST, MAIL_SERVER_HOST);
//        props.setProperty(Constants.MAIL_PORT, String.valueOf(MAIL_SERVER_PORT));
//        props.setProperty(Constants.MAIL_SMTP_AUTH, Constants.STRING_TRUE);
//        props.setProperty(Constants.MAIL_TRANSPORT_PROTOCOL, MAIL_PROTOCOL);
//        props.setProperty(Constants.MAIL_SMTP_STARTTLS_ENABLE, STARTTLS_ENABLE);
//        if (SSL_ENABLE) {
//            props.setProperty(Constants.MAIL_SMTP_SSL_ENABLE, "true");
//            props.setProperty(Constants.MAIL_SMTP_SSL_TRUST, SSL_TRUST);
//        }
//
//        Authenticator auth = new Authenticator() {
//            @Override
//            protected PasswordAuthentication getPasswordAuthentication() {
//                // mail username and password
//                return new PasswordAuthentication(MAIL_USER, MAIL_PASSWD);
//            }
//        };
//
//        return Session.getInstance(props, auth);
//    }
//
//    /**
//     * attach content
//     * @param receiversCc the cc list
//     * @param title the title
//     * @param content the content
//     * @param partContent the partContent
//     * @param msg the message
//     * @throws MessagingException
//     * @throws IOException
//     */
//    private static void attachContent(Collection<String> receiversCc, String title, String content, String partContent,MimeMessage msg) throws MessagingException, IOException {
//        /**
//         * set receiverCc
//         */
//        if(CollectionUtils.isNotEmpty(receiversCc)){
//            for (String receiverCc : receiversCc){
//                msg.addRecipients(Message.RecipientType.CC, InternetAddress.parse(receiverCc));
//            }
//        }
//
//        // set subject
//        msg.setSubject(title);
//        MimeMultipart partList = new MimeMultipart();
//        // set signature
//        MimeBodyPart part1 = new MimeBodyPart();
//        part1.setContent(partContent, Constants.TEXT_HTML_CHARSET_UTF_8);
//        // set attach file
//        MimeBodyPart part2 = new MimeBodyPart();
//        File file = new File(xlsFilePath + Constants.SINGLE_SLASH +  title + Constants.EXCEL_SUFFIX_XLS);
//        if (!file.getParentFile().exists()) {
//            file.getParentFile().mkdirs();
//        }
//        // make excel file
//
//        ExcelUtils.genExcelFile(content,title,xlsFilePath);
//
//        part2.attachFile(file);
//        part2.setFileName(MimeUtility.encodeText(title + Constants.EXCEL_SUFFIX_XLS,Constants.UTF_8,"B"));
//        // add components to collection
//        partList.addBodyPart(part1);
//        partList.addBodyPart(part2);
//        msg.setContent(partList);
//        // 5. send Transport
//        Transport.send(msg);
//        // 6. delete saved file
//        deleteFile(file);
//    }
//
//    /**
//     * the string object map
//     * @param title the title
//     * @param content the content
//     * @param showType the showType
//     * @param retMap the result map
//     * @param email the email
//     * @return the result map
//     * @throws EmailException
//     */
//    private static Map<String, Object> getStringObjectMap(String title, String content, String showType, Map<String, Object> retMap, HtmlEmail email) throws EmailException {
//
//        /**
//         * the subject of the message to be sent
//         */
//        email.setSubject(title);
//        /**
//         * to send information, you can use HTML tags in mail content because of the use of HtmlEmail
//         */
//        if (showType.equals(ShowType.TABLE.getDescp())) {
//            email.setMsg(htmlTable(content));
//        } else if (showType.equals(ShowType.TEXT.getDescp())) {
//            email.setMsg(htmlText(content));
//        }
//
//        // send
//        email.send();
//
//        retMap.put(Constants.STATUS, true);
//
//        return retMap;
//    }
//
//    /**
//     * file delete
//     * @param file the file to delete
//     */
//    public static void deleteFile(File file){
//        if(file.exists()){
//            if(file.delete()){
//                logger.info("delete success: {}",file.getAbsolutePath() + file.getName());
//            }else{
//                logger.info("delete fail: {}", file.getAbsolutePath() + file.getName());
//            }
//        }else{
//            logger.info("file not exists: {}", file.getAbsolutePath() + file.getName());
//        }
//    }
//
//
//    /**
//     * handle exception
//     * @param receivers the receiver list
//     * @param retMap the result map
//     * @param e the exception
//     */
//    private static void handleException(Collection<String> receivers, Map<String, Object> retMap, Exception e) {
//        logger.error("Send email to {} failed", receivers, e);
//        retMap.put(Constants.MESSAGE, "Send email to {" + String.join(",", receivers) + "} failed，" + e.toString());
//    }
//
//
//}