const express = require("express");
const router = express.Router();
const multer = require("multer");
const upload = multer({ dest: "uploads/" }); // or your existing multer config
const { donorPool } = require("../db");

// Helper: get filename from uploaded files
const getFileName = (files, field) => files && files[field] && files[field][0] ? files[field][0].filename : null;

// Donor submission controller function
const submitDonor = (req, res) => {
  const files = req.files || {};
  const {
    name, email, age, dob, phone, pan_number,
    bank_account_holder_name, bank_name, bank_account_number, ifsc_code,
    donation_amount, payment_method
  } = req.body;

  if (!name || !donation_amount || !payment) {
    return res.status(400).json({ error: 'Missing required fields' });
  } else {
    const pan_document = getFileName(files, 'pan_document');
    const transaction_screenshot = getFileName(files, 'transaction_screenshot');

    const sql = `
      INSERT INTO donors (
        name, email, age, dob, phone, pan_number, pan_document,
        bank_account_holder_name, bank_name, bank_account_number, ifsc_code,
        donation_amount, payment, transaction_screenshot
      ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
    `;

    const values = [
      name, email || null, age || null, dob || null, phone || null, pan_number || null, pan_document,
      bank_account_holder_name || null, bank_name || null, bank_account_number || null, ifsc_code || null,
      donation_amount, payment, transaction_screenshot
    ];

    donorPool.query(sql, values, (err, results) => {
      if (err) {
        console.error('Donor Insert Error:', err);
        return res.status(500).json({ error: 'Failed to insert donor data' });
      }
      res.json({ message: 'Donor data submitted', id: results.insertId });
    });
  }
};

// Route definition
router.post("/donor/submit", upload.fields([
  { name: "pan_document", maxCount: 1 },
  { name: "transaction_screenshot", maxCount: 1 }
]), submitDonor);

module.exports = router;