app.js

require('dotenv').config();

const mongoose = require('mongoose');
const createError = require('http-errors');
const logger = require('morgan');
const express = require('express');
const cors = require('cors');

require('./config/db.config')
const app = express();

// Middlewares
app.use(express.json());
app.use(logger('dev'));
app.use(cors());


// Routes
const routes = require('./config/routes');
app.use('/api', routes);

// Errors
app.use((req, res, next) => next(createError(404), 'Route not found'));

app.use((error, req, res, next) => {
    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.status) {
        error = createError(500, error);
    }

    if (error >= 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)
});

const port = Number(process.env.PORT || 3001);

app.listen(port, () => {
  console.log(`Ready! Listening on port ${port}.`);
});