var express   = require('express');
var router    = express.Router();
const nodemailer = require('nodemailer');

let transporter = nodemailer.createTransport({
    host: 'smtp.ionos.com',
    port: 587,
    secure: false,
    auth:{
        user: 'mail@ofbbutte.com',
        pass: '@2014OfbPwd'
    }

});

router.get("/",function(req,res){
    res.status(200).json({"message":"Hello World"});
    return;
});

router.post("/", function(req,res){
    console.log(req.body);
    //This is the honeypot field
    //If it has something in it then we know it was filled out by a bot
    if (!req.body.hp || req.body.hp != '.'){
        res.status(200).json({"status":200,"message":"Success!"});
        return;
    }

    let mailOptions = {
        from: 'donotreply@ofbbutte.com',
        to: 'djabsher@gmail.com',
        subject: 'OFB - VBS Registration' + req.body.firstName,
        html: generateRegistrationEmailHTML(req.body)
    };
    transporter.sendMail(mailOptions,(error, info) =>{
        if (error){
            console.log(error);
            res.status(400).json({"status":400,"message":"There was an error","error":error.response});
        } else {
            res.status(200).json({"status":200,"message":"Success"});
        }
    });
    
});

/**
 * Generates a sectioned HTML email string for the registration form.
 * Displays all fields even if they are empty.
 * @param {Object} data - The value object from this.form.value
 * @returns {string} Ready-to-send HTML string
 */
function generateRegistrationEmailHTML(data) {
  
  // Helper to cleanly format boolean true/false fields
  const formatBool = (val) => {
    if (val === true || val === 'true') return 'Yes';
    if (val === false || val === 'false') return 'No';
    return val;
  };

  // Helper to ensure we don't render literal 'null' or 'undefined' text
  const sanitizeValue = (val) => {
    if (val === null || val === undefined) return '';
    return String(val).trim();
  };

  // Define the layout sections and human-readable labels
  const sections = [
    {
      title: "Student Information",
      fields: [
        { label: "Student Name", value: `${sanitizeValue(data.firstName)} ${sanitizeValue(data.lastName)}`.trim() },
        { label: "Grade", value: sanitizeValue(data.grade) },
        { label: "Date of Birth", value: sanitizeValue(data.dob) },
        { label: "Has Allergies?", value: sanitizeValue(formatBool(data.hasAllergies)) },
        { label: "Allergies", value: sanitizeValue(data.allergies) },
        { label: "Has Dietary Restrictions?", value: sanitizeValue(formatBool(data.hasDietaryRestrictions)) },
        { label: "Dietary Restrictions", value: sanitizeValue(data.dietaryRestrictions) },
        { label: "Attended in Past?", value: sanitizeValue(formatBool(data.attendedInPast)) },
        { label: "Rides Bus?", value: sanitizeValue(formatBool(data.ridesBus)) }
      ]
    },
    {
      title: "Parent / Guardian Contact",
      fields: [
        { label: "Parent Name", value: `${sanitizeValue(data.parentFirstName)} ${sanitizeValue(data.parentLastName)}`.trim() },
        { label: "Email", value: sanitizeValue(data.parentEmail) },
        { label: "Mobile Phone", value: sanitizeValue(data.parentMobilePhone) },
        { label: "Home Phone", value: sanitizeValue(data.parentHomePhone) },
        { label: "Work Phone", value: sanitizeValue(data.parentWorkPhone) },
        { label: "Address", value: `${sanitizeValue(data.address1)}${data.address2 ? ', ' + sanitizeValue(data.address2) : ''}, ${sanitizeValue(data.city)}, ${sanitizeValue(data.state)} ${sanitizeValue(data.zip)}`.trim().replace(/^,|,$/g, '') }
      ]
    },
    {
      title: "Emergency Contact",
      fields: [
        { label: "Same as Parent?", value: sanitizeValue(formatBool(data.emergencySameAsParent)) },
        { label: "Emergency Name", value: `${sanitizeValue(data.emergencyFirstName)} ${sanitizeValue(data.emergencyLastName)}`.trim() },
        { label: "Emergency Phone", value: sanitizeValue(data.emergencyPhone) }
      ]
    }
  ];

  // Map the sections array into HTML tables (No filtering out fields!)
  const htmlContent = sections.map(section => {
    const rows = section.fields.map(field => `
      <tr>
        <td style="padding: 10px 12px; border-bottom: 1px solid #edf2f7; font-weight: 600; color: #4a5568; width: 35%; font-size: 14px;">
          ${field.label}
        </td>
        <td style="padding: 10px 12px; border-bottom: 1px solid #edf2f7; color: #2d3748; font-size: 14px;">
          ${field.value}
        </td>
      </tr>
    `).join('');

    return `
      <h3 style="color: #4f46e5; font-size: 16px; margin-top: 24px; margin-bottom: 10px; border-bottom: 2px solid #e2e8f0; padding-bottom: 6px; font-weight: 600;">
        ${section.title}
      </h3>
      <table border="0" cellpadding="0" cellspacing="0" width="100%" style="border-collapse: collapse; margin-bottom: 15px;">
        <tbody>
          ${rows}
        </tbody>
      </table>
    `;
  }).join('');

  return `
    <!DOCTYPE html>
    <html>
    <head>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <title>New Registration Submission</title>
    </head>
    <body style="margin: 0; padding: 0; background-color: #f7fafc; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;">
      <table border="0" cellpadding="0" cellspacing="0" width="100%" style="background-color: #f7fafc; padding: 24px 0;">
        <tr>
          <td align="center">
            <table border="0" cellpadding="0" cellspacing="0" width="100%" style="max-width: 650px; background-color: #ffffff; border-radius: 8px; overflow: hidden; box-shadow: 0 4px 6px rgba(0,0,0,0.05); border: 1px solid #e2e8f0;">
              
              <!-- Header Banner -->
              <tr>
                <td style="background-color: #4f46e5; padding: 24px; text-align: center;">
                  <h1 style="color: #ffffff; margin: 0; font-size: 20px; font-weight: 600; letter-spacing: 0.5px;">
                    New Registration Submitted
                  </h1>
                </td>
              </tr>
              
              <!-- Content Body -->
              <tr>
                <td style="padding: 24px 32px;">
                  <p style="margin-top: 0; margin-bottom: 16px; font-size: 15px; color: #718096; line-height: 1.5;">
                    A new form submission has been received.
                  </p>
                  
                  ${htmlContent}
                  
                </td>
              </tr>
              
              <!-- Footer -->
              <tr>
                <td style="background-color: #f8fafc; padding: 20px; text-align: center; font-size: 12px; color: #a0aec0; border-top: 1px solid #edf2f7;">
                  This email was automatically generated and sent from the registration system.
                </td>
              </tr>
              
            </table>
          </td>
        </tr>
      </table>
    </body>
    </html>
  `;
}

module.exports = router;