package com.taover.util;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class UtilEmail {
	public static Map<String, String> GLOBAL_CONFIG = new HashMap<String, String>(){{
		put("host", "smtp.taover.com");
		put("port", "25");
		put("username", "taover-robot@taover.com");
		put("password", "Lexi@1798");
		put("header", "报警-服务不可用");
		put("from", "taover-robot@taover.com");
		put("fromName", "八爪云-服务监控");
		put("htmlTopic", "text/html; charset=utf-8");
	}};
	
   
  /** 
   * 发�?�HTML格式的邮�? 
   */ 
  public static void sendHtmlMail(List<String> toList, String subject, String htmlContent, Map<String, String> mailHostConfig) {   
//    获取系统环境  
    Properties prop = new Properties();
//   添加必要的信�? 
    prop.put("mail.smtp.host", getValue("host", mailHostConfig));
    prop.put("mail.smtp.port", getValue("port", mailHostConfig));   
    prop.put("mail.smtp.auth", "true");   
     
//    设置对话和邮件服务器进行通讯
    Authenticator auth = new SimpleAuthenticator(getValue("username", mailHostConfig), getValue("password", mailHostConfig));
    Session session = Session.getDefaultInstance(prop, auth);   
     
//   设置邮件对象 
    Message message = new MimeMessage(session);   
    try  
    {   
//      设置邮件主题  
      message.setSubject(subject);   
//      设置邮件标题   
      message.setHeader("Header", getValue("header", mailHostConfig));  
//      设置发�?�时�?   
      message.setSentDate(new Date()); 
       
//      设置发信人地�? �? 名字 
      Address address = new InternetAddress(getValue("from", mailHostConfig), getValue("fromName", mailHostConfig));   
//     把发件人信息添加到信息中 
      message.setFrom(address);   
       
//     设置收件人地�?
      List<Address> addressList = new ArrayList<Address>();
      for(String item: toList) {
    	  if(item != null && !"".equals(item.trim())) {
    		  addressList.add(new InternetAddress(item));
    	  }
      }
      
//      设置接收人地�? 
      message.addRecipients(Message.RecipientType.TO, addressList.toArray(new Address[addressList.size()]));
      
//     设置多个收件人地�?   
//     message.addRecipient(Message.RecipientType.TO,new InternetAddress("xxx@xxx.com"));   
 
//     设置发�?�信息的内容  下面为发送hmml 
//     设置邮件格式 
      message.setContent(htmlContent, getValue("htmlTopic", mailHostConfig));  
 
//     保存上面添加的信�? 
      message.saveChanges();   
      Transport.send(message);
    } catch (Exception e)  { 
        e.printStackTrace();   
    }
  }
  
  public static void sendHtmlMail(List<String> toList, String subject, String htmlContent) {
	  sendHtmlMail(toList, subject, htmlContent, null);
  }
  
  public static String getValue(String key, Map<String, String> localConfig) {
		if(localConfig == null) {
			return GLOBAL_CONFIG.get(key);
		}else {
			String data = localConfig.get(key);
			if(data == null) {
				return GLOBAL_CONFIG.get(key);
			}else {
				return data;
			}
		}		
	}
 
  /** 
   * @param args 
   */ 
  public static void main(String[] args) { 
	  sendHtmlMail(Arrays.asList("wangbin@taover.com", "317058383@qq.com"), "测试邮件", "<h1>Hello Email Saturday V2</h1>");
  }  
}

class SimpleAuthenticator extends Authenticator{
  private String username="";   
  private String password="";   
    
  public SimpleAuthenticator() { 
    super(); 
  } 
    
  /** 
   * 设置验证的用户名和密�? 
   */
  public SimpleAuthenticator(String userName , String password) { 
    super(); 
    this.username = userName; 
    this.password = password; 
  } 
  protected PasswordAuthentication getPasswordAuthentication() {   
    return new PasswordAuthentication(this.username,this.password);   
  }   

}