package com.baekyangdan.scheduler.service;

import java.util.Properties;

import org.springframework.stereotype.Service;

import com.google.auth.oauth2.AccessToken;
import com.google.auth.oauth2.UserCredentials;

import jakarta.mail.Message;
import jakarta.mail.Session;
import jakarta.mail.Transport;
import jakarta.mail.internet.InternetAddress;
import jakarta.mail.internet.MimeMessage;

@Service
public class MailService {
    
    private static final String CLIENT_ID="688417162908-iqvnj4ceb8t1dkbjr70dtcafo27m8kqe.apps.googleusercontent.com";
    private static final String CLIENT_SECRET="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";
    private static final String REFRESH_TOKEN="1//04_pSivNoGpPUCgYIARAAGAQSNwF-L9IrO0Kx6jSzq_eQNjdl65f0O2iqKSNpFeZ3gtIGMhOk0oiZsnKrPfWs8jvuEic1NhUoZ0g";
    private static final String USER_MAIL="baekyangdan@gmail.com";

    public void sendTestMail() throws Exception {
        UserCredentials credentials = 
        UserCredentials.newBuilder()
            .setClientId(CLIENT_ID)
            .setClientSecret(CLIENT_SECRET)
            .setRefreshToken(REFRESH_TOKEN)
            .build();

        AccessToken accessToken = credentials.refreshAccessToken();
        
        Properties props = new Properties();
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth.mechanisms", "XOAUTH2");

        Session session = Session.getInstance(props);
        Transport transport = session.getTransport("smtp");

        transport.connect("smtp.gmail.com", USER_MAIL, accessToken.getTokenValue());

        Message message = new MimeMessage(session);
        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("lapinuit966@gmail.com"));
        message.setSubject("test Mail");
        message.setText("test mail");
        message.setFrom(new InternetAddress(USER_MAIL));

        transport.sendMessage(message, message.getAllRecipients());
        transport.close();

        System.out.println("메일 전송 완료");
    }
}