const { logger } = require('../util/logger');
const {
  getDailyLimit,
  getUsedLimit,
} = require('../services/paymentLimit.service');

async function checkLimit(req, res, next) {
  const { amount } = req.body;
  const { user, client } = req;
  const dailyLimit = await getDailyLimit(user, client);
  if (!dailyLimit) {
    logger.info('NO LIMIT SET FOR CUSTOMER. ALLOWING TRANSACTIONS');
    next();
  }
  const usedLimit = await getUsedLimit(user, client);

  const remainingLimit = dailyLimit - usedLimit;

  if (amount > remainingLimit) {
    const midnight = new Date();
    midnight.setHours(24, 0, 0, 0);
    res.set('Retry-After', midnight.toUTCString());
    return res.status(403).json({ error: 'Daily limit exhausted' });
  }
  next();
}

module.exports = { checkLimit };