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/*
 * Copyright 2006-2023 www.anyline.org
 *
 * Licensed 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.anyline.mail.util;
 
import org.anyline.util.AnylineConfig;
import org.anyline.util.BasicUtil;
import org.anyline.log.Log;
import org.anyline.log.LogProxy;

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Hashtable;
import java.util.Properties;
 
public class MailUtil {
	private static final Log log = LogProxy.get(MailUtil.class); 
	private MailConfig config = null; 
	private Properties props = new Properties(); 
	private static Hashtable instances = new Hashtable();


	public MailConfig getConfig(){
		return config; 
	}

	static {
		Hashtable configs = MailConfig.getInstances();
		for(String key:configs.keySet()){
			instances.put(key, getInstance(key));
		}
	}
	public static Hashtable getInstances(){
		return instances;
	}

	public static MailUtil getInstance() {
		return getInstance(MailConfig.DEFAULT_INSTANCE_KEY);
	} 

	public static MailUtil getInstance(String key) {
		if (BasicUtil.isEmpty(key)) {
			key = MailConfig.DEFAULT_INSTANCE_KEY;
		} 
		MailUtil util = instances.get(key); 
		if (null == util) {
			util = new MailUtil(); 
			MailConfig config = MailConfig.getInstance(key);
			if(null != config) {
				util.config = config;
				util.props.put("username", config.ACCOUNT);
				util.props.put("password", config.PASSWORD);
				util.props.put("mail.transport.protocol", config.PROTOCOL);
				util.props.put("mail.smtp.host", config.HOST);
				util.props.put("mail.smtp.port", config.PORT);

				if (config.SSL) {
					// 端口465时需要ssl验证 解决部分服务器不开放25端口问题
					util.props.setProperty("mail.smtp.auth", "true");
					util.props.setProperty("mail.smtp.ssl.enable", "true");
					util.props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
					util.props.setProperty("mail.smtp.socketFactory.fallback", "false");
					util.props.setProperty("mail.smtp.socketFactory.port", config.PORT);
				}
				instances.put(key, util);
			}
		} 
		return util; 
	} 
 
	/** 
	 *  
	 * @param fr		发送人姓名  fr		发送人姓名
	 * @param to		收件人地址  to		收件人地址
	 * @param title		邮件主题  title		邮件主题
	 * @param content	邮件内容  content	邮件内容
	 * @return boolean
	 */ 
	public boolean send(String fr, String to, String title, String content) {
		log.warn("[send email][from:{}({})][to:{}][title:{}][content:{}]",config.ACCOUNT, fr,to,title,content);
		try {
			Session mailSession = Session.getDefaultInstance(props); 
			Message msg = new MimeMessage(mailSession); 
			msg.setFrom(new InternetAddress(config.ACCOUNT,fr)); 
			msg.addRecipients(Message.RecipientType.TO, InternetAddress.parse(to)); 
			msg.setSubject(title + ""); 
			msg.setContent(content + "", "text/html;charset=UTF-8"); 
			msg.saveChanges(); 
			Transport transport = mailSession.getTransport("smtp"); 
			transport.connect(config.HOST,
					config.ACCOUNT, 
					config.PASSWORD);
			transport.sendMessage(msg, msg.getAllRecipients()); 
			transport.close(); 
		} catch (Exception e) {
			e.printStackTrace(); 
			return false; 
		} 
 
		return true; 
	} 
	public boolean send(String to, String title, String content) {
		return send(config.USERNAME, to, title, content);
	} 
}