package com.whyc.service;

import com.whyc.constant.UserOperation;
import com.whyc.dto.MailDTO;
import com.whyc.dto.Response;
import com.whyc.pojo.MailQueue;
import com.whyc.util.ActionUtil;
import com.whyc.util.MailUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.MailException;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.mail.MessagingException;
import java.util.Arrays;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;

@Service
public class MailService {

    @Autowired
    private MailUtil mailUtil;

    @Autowired
    private DocLogService logService;

    @Autowired
    private MailQueueService mailQueueService;

    @Transactional
    public Response sendMail(MailDTO mailDTO) {
        Long uId = ActionUtil.getUser().getId();
        String name=ActionUtil.getUser().getName();
        //日志内容准备
        StringBuilder mailUserStr = new StringBuilder();
        List<String> mailList = mailDTO.getMailList();
        for (int i = 0; i < mailList.size(); i++) {
            if(i==0){
                mailUserStr.append(mailList.get(i));
            }else{
                mailUserStr.append(","+mailList.get(i));
            }
        }
        try {
            mailUtil.sendMailBatch(name,mailDTO.getMailList(),mailDTO.getTitle(),mailDTO.getContent());

            String msgDetail = "发送给邮箱" + mailUserStr + ",标题为:" + mailDTO.getTitle() + ",内容为:" + mailDTO.getContent();
            logService.record(uId, name, UserOperation.TYPE_SEND_MAIL.getType(), "邮件发送", msgDetail);
            return new Response().set(1,true,"发送完成");
        } catch (MessagingException | MailException ex) { //邮件发送异常,存入数据库待重新发送列表
            MailQueue queue = new MailQueue();
            queue.setMails(mailUserStr.toString());
            queue.setTitle(mailDTO.getTitle());
            queue.setContent(mailDTO.getContent());
            queue.setCreateTime(new Date());
            queue.setSenderUserId(uId);
            queue.setSenderUserName(name);
            mailQueueService.add(queue);
            return new Response().set(1,false,"发送失败,网络异常,网络恢复后自动延时发送");
        }
    }

    public void sendQueueMail(MailQueue queue) {
        Long uId = queue.getSenderUserId();
        String name = queue.getSenderUserName();

        String mails = queue.getMails();
        String[] mailSplits = mails.split(",");
        List<String> mailList = new LinkedList<>(Arrays.asList(mailSplits));
        try{
            mailUtil.sendMailBatch(name,mailList,queue.getTitle(),queue.getContent());
            //删除 数据库邮件队列表中 已被发送的邮件记录
            mailQueueService.deleteById(queue.getId());
            //日志
            String msgDetail = "发送给邮箱" + mails + ",标题为:" + queue.getTitle() + ",内容为:" + queue.getContent();
            logService.record(uId, name, UserOperation.TYPE_SEND_MAIL.getType(), "邮件因网络问题由系统延时发送", msgDetail);
        } catch (MessagingException | MailException ex) { //邮件发送异常
            //System.out.println("邮件发送异常,后续会持续发送直到成功");
        }
    }
}