app.js

require('dotenv').config();
const express = require('express');
const mongoose = require('mongoose');
const logger = require('morgan');
const createError = require('http-errors');
const jwt = require('jsonwebtoken');
const cors = require('cors')
require('./config/db.config'); // se conecta a la base de datos que esta en config

const app = express();

app.use(cors())
app.use(logger('dev'));
app.use(express.json()); // Sin esto no sabe usar req.body


const routes = require('./config/routes.config'); // conecto las rutas
app.use('/api', routes)

/* Handle errors */

app.use((req, res, next) => {
    next(createError(404, 'Route not found'))
  })

  app.use((error, req, res, next) => {
    console.log(error)
      if (error instanceof mongoose.Error.ValidationError) {
        error = createError(400, error);
      } else if (error instanceof mongoose.Error.CastError) {
        error = createError(404, "Resource not found");
      } else if (error.message.includes("E11000")) {
        error = createError(400, "Already exists");
      } else if (error instanceof jwt.JsonWebTokenError) {
        error = createError(401, error);
      } else if (!error.status) {
        error = createError(500, error);
      }
    
      if (error.status >= 500) {
        console.error(error);
      }
    
      const data = {};
      data.message = error.message;
      data.errors = error.errors
        ? Object.keys(error.errors).reduce(
            (errors, key) => ({
              ...errors,
              [key]: error.errors[key].message || error.errors[key],
            }),
            {}
          )
        : undefined;
    
      res.status(error.status).json(data);
    });
    

//PORT
app.listen(process.env.PORT || 3001, () => {
    console.log('App in process at', process.env.PORT || 3001)
  })