/**
 * Idempotency middleware
 * Ensures requests with same idempotency key are only processed once
 */

import { Request, Response, NextFunction } from 'express';
// import { redisClient } from '../services/redis';

export async function idempotencyMiddleware(req: Request, res: Response, next: NextFunction) {
  const idempotencyKey = req.headers['idempotency-key'] as string;
  
  if (!idempotencyKey) {
    return next();
  }
  
  // TODO: Check Redis for existing response
  // TODO: Store response in Redis for replay
  // For now, pass through (will be implemented in Phase 6)
  next();
}