backend/controller/applicantController.js

const { checkAndRefreshAccessToken } = require('../utils/refreshToken');
const { checkExistingJobApplication, insertJobApplication } = require('../utils/jobRequestDB');
const { sendEmail } = require('../utils/sendEmail');

const submitJobApplication = async (req, res) => {
    const { name, email, phone, experience, role, linkedin } = req.body;
    const resume = req.file;

    console.log('Received job application:', req.body);
    console.log('Received job CV:', req.file);

    // Basic validation
    if (!name || !email || !phone || !experience || !role || !linkedin || !resume) {
        console.log("Missing required fields");
        return res.status(400).json({ error: 'Please fill in all required fields.' });
    }

    // Validate email format
    const emailRegex = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
    if (!emailRegex.test(email)) {
        console.log("Invalid email format");
        return res.status(400).json({ error: 'Please enter a valid email address.' });
    }

    // Refresh access token if needed
    await checkAndRefreshAccessToken();

    // Check if job request already exists
    const existingRequest = await checkExistingJobApplication(name, email, role);
    if (existingRequest) {
        console.log(`Your Job request for the role ${role} is already in queue`);
        return res.status(400).json({ error: `Your Job request for the role ${role} is already in queue` });
    }

    const filename = resume.originalname;

    // Insert application into the database
    await insertJobApplication(name, email, phone, experience, role, linkedin, resume.buffer, filename);
    console.log('Job Application added to DB successfully');

    try{
        // =============================
        //   Email to Applicant
        // =============================
        const applicantSubject = "Job Application Received";
        const applicantHtmlMessage = `
            <div style="font-family: Arial, sans-serif; color: #333;">
                <center><img src="https://drive.google.com/thumbnail?id=17oMmzl_mTNvohvLhSWHbb_XNPfCC8KaO" alt="Genomatics Logo" height="150px"></center>
                <h2 style="color: #0056b3;">Hello ${name},</h2>
                <p>Thank you for submitting your application for the ${role} role at Genomatics. We’ve received your details and will review your qualifications shortly.</p>
                <p><strong>Submitted Details:</strong></p>
                <ul>
                    <li><strong>Name:</strong> ${name}</li>
                    <li><strong>Email:</strong> ${email}</li>
                    <li><strong>Phone:</strong> ${phone}</li>
                    <li><strong>Experience:</strong> ${experience} years</li>
                    <li><strong>Role:</strong> ${role}</li>
                    <li><strong>LinkedIn:</strong> <a href="${linkedin}" target="_blank">${linkedin}</a></li>
                </ul>
                <p>We appreciate your interest and will reach out if there’s a match for the position.</p>
                <p style="margin-top: 20px;">Best regards,</p>
                <p><strong>The Genomatics Hiring Team</strong></p>

                <hr style="border: 0; height: 1px; background: #ddd; margin: 20px 0;">
                <p style="font-size: 12px; color: #666;">
                    This email was sent in response to your job application form submission on the Genomatics platform.
                </p>

                <!-- Social Media Links Section -->
                <div style="margin-top: 30px; text-align: center; display: flex; justify-content: center; align-items: center;">
                    <p>Follow us on social media:</p>
                    <a href="https://x.com/" target="_blank" style="margin: 0 10px;">
                        <img src="https://uxwing.com/wp-content/themes/uxwing/download/brands-and-social-media/x-social-media-white-icon.png" alt="Twitter" width="20" height="20" style="border-radius: 50%; background-color: #3A61B9; padding: 5px;">
                    </a>
                    <a href="https://www.linkedin.com/company/genomatics" target="_blank" style="margin: 0 10px;">
                        <img src="https://img.icons8.com/?size=100&id=102748&format=png&color=FFFFFF" alt="LinkedIn" width="20" height="20" style="border-radius: 50%; background-color: #3A61B9; padding: 5px;">
                    </a>
                </div>
            </div>`;

        await sendEmail(email, applicantSubject, applicantHtmlMessage);

        // =============================
        // 🔹 Email to Authorities (HR Team)
        // =============================
        const authorityEmail = process.env.TEAM_MAIL_IDS;
        const authoritySubject = `New Job Application for ${role}`;
        const authorityHtmlMessage = `
            <div style="font-family: Arial, sans-serif; color: #333; line-height: 1.6;">
                <center><img src="https://drive.google.com/thumbnail?id=17oMmzl_mTNvohvLhSWHbb_XNPfCC8KaO" alt="Genomatics Logo" height="150px"></center>
                <h2 style="color: #0056b3;">📢 New Job Application Received</h2>
                <p>Dear Hiring Team,</p>
                <p>We have received a new job application. Below are the applicant's details:</p>
                <ul>
                    <li><strong>Name:</strong> ${name}</li>
                    <li><strong>Email:</strong> ${email}</li>
                    <li><strong>Phone:</strong> ${phone}</li>
                    <li><strong>Experience:</strong> ${experience} years</li>
                    <li><strong>Role Applied:</strong> ${role}</li>
                    <li><strong>LinkedIn:</strong> <a href="${linkedin}" target="_blank">${linkedin}</a></li>
                </ul>
                <p>📎 The applicant has attached their resume for your review.</p>
                <p>Kindly review the application and take the necessary steps.</p>
                <p style="margin-top: 20px;">Best regards,</p>
                <p><strong>Genomatics Hiring System</strong></p>
            </div>`;

        await sendEmail(authorityEmail, authoritySubject, authorityHtmlMessage, resume, filename);

        res.status(200).json({ message: 'Your Job Application has been submitted successfully!' });
    }catch (error) {
        console.error('Error sending emails:', error);
        res.status(400).json({ error: 'Unable to send email for the confirmation of submission, but the application was received suvvessfully!' });
    }
};

module.exports = { submitJobApplication };