import cors from 'cors';
import express from 'express';
import helmet from 'helmet';
import pinoHttp from 'pino-http';
import rateLimit from 'express-rate-limit';
import { router } from './routes/index.js';
import { notFoundHandler } from './middlewares/not-found.js';
import { errorHandler } from './middlewares/error-handler.js';
import { logger } from './config/logger.js';

export function createApp() {
  const app = express();

  app.use(helmet());
  app.use(
    cors({
      origin: '*',
      credentials: true
    })
  );
  app.use(express.json({ limit: '10mb' }));
  app.use(express.urlencoded({ extended: true }));
  app.use(
    rateLimit({
      windowMs: 60_000,
      limit: 100,
      legacyHeaders: false
    })
  );
  app.use(
    pinoHttp({
      logger,
      autoLogging: false
    })
  );

  app.get('/', (_req, res) => {
    res.json({
      name: 'AI Bill API',
      version: '0.1.0',
      uptime: process.uptime()
    });
  });

  app.use('/api', router);

  app.use(notFoundHandler);
  app.use(errorHandler);

  return app;
}