const express = require('express');
const router = express.Router();
const { fetchJSON, uploadJSON } = require('../services/pixelbin');

// GET /api/providers
router.get('/', async (req, res) => {
  try {
    const data = await fetchJSON(`brands/${process.env.MERCHANT_ID}`, 'providers');
    res.json(data || {});
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// POST /api/providers
router.post('/', async (req, res) => {
  try {
    const { providerName, senderId, dltEntityId } = req.body;
    if (!providerName || !senderId || !dltEntityId) {
      return res.status(400).json({ error: 'providerName, senderId, and dltEntityId are required' });
    }
    if (senderId.length !== 6 || !/^[A-Za-z]+$/.test(senderId)) {
      return res.status(400).json({ error: 'Sender ID must be exactly 6 alphabetic characters' });
    }

    const config = {
      providerName,
      senderId: senderId.toUpperCase(),
      dltEntityId,
      updatedAt: new Date().toISOString(),
    };
    await uploadJSON(`brands/${process.env.MERCHANT_ID}`, 'providers', config);
    res.json(config);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

module.exports = router;