package com.cxs.utils;
import cn.hutool.core.io.resource.ClassPathResource;
import cn.hutool.core.io.resource.Resource;
import com.cxs.config.MailConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.text.MessageFormat;

/**
 * @Project: cxs-currency-sys-server
 * @Author: cxs2014501@163.com
 * @Create: 2023/2/8 13:37
 * @Description:
 **/
@Slf4j
@Component
public class SendMailUtil {

    @Autowired
    private JavaMailSenderImpl javaMailSender;

    @Autowired
    private MailConfig mailConfig;

    /**
     * 发送带附近的邮件信息
     * @param to 收件人
     * @param subject  主题
     * @param content  内容
     */
    public void sendMail(String to, String subject, String content) {
        MimeMessage message = javaMailSender.createMimeMessage();
        try {
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setSubject(subject);
            helper.setText(content, true);
            helper.setTo(to);
            helper.setFrom(mailConfig.getUsername());
            javaMailSender.send(message);
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }


    /**
     * 读取邮件模板
     * 替换模板中的信息
     * @param code 内容
     * @return
     */
    public String buildCodeContent(String code) {
        //加载邮件html模板
        Resource resource = new ClassPathResource("mailtemplate.ftl");
        InputStream inputStream = null;
        BufferedReader fileReader = null;
        StringBuffer buffer = new StringBuffer();
        String line = "";
        try {
            inputStream = resource.getStream();
            fileReader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
            while ((line = fileReader.readLine()) != null) {
                buffer.append(line);
            }
        } catch (Exception e) {
            log.info("发送邮件读取模板失败{}", e);
        } finally {
            if (fileReader != null) {
                try {
                    fileReader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        //替换html模板中的参数
        return MessageFormat.format(buffer.toString(), "测试验证码", "全栈小白的手机号", mailConfig.getUsername(), code);
    }
}