app.js

import { config } from 'dotenv';
import mongoose from 'mongoose';
import express from 'express';
import swaggerUi from 'swagger-ui-express';
import swaggerJsdoc from 'swagger-jsdoc';
import fs from 'fs';
import YAML from 'yaml';

import { middlewareConfig } from './config/index.js';
import { errorHandler } from './middleware/errorHandler.js';
import indexRoutes from './routes/index.routes.js';
import authRoutes from './routes/auth.routes.js';
import familyRoutes from './routes/family.routes.js';
import memoryRoutes from './routes/memory.routes.js';

// ℹ️ Gets access to environment variables/settings
// https://www.npmjs.com/package/dotenv
config();

// ℹ️ --- DB ---
// Connects to the database
// package responsible to make the connection with mongodb
// https://www.npmjs.com/package/mongoose

// Sets the MongoDB URI for our app to have access to it.
// If no env has been set, we dynamically set it to whatever the folder name was upon the creation of the app

const MONGO_URI = process.env.MONGODB_URI || 'mongodb://127.0.0.1:27017/memories';

mongoose
  .connect(MONGO_URI)
  .then((x) => {
    const dbName = x.connections[0].name;
    console.log(`Connected to Mongo! Database name: "${dbName}"`);
  })
  .catch((err) => {
    console.error('Error connecting to mongo: ', err);
  });

// ℹ️ --- Swagger docs ---

// Load the Swagger specifications from the YAML files
const memorySpec = YAML.parse(fs.readFileSync('./swagger/memory.yaml', 'utf8'));
const testSpec = YAML.parse(fs.readFileSync('./swagger/test.yaml', 'utf8'));

// Combine the specifications
const combinedSpec = {
  ...memorySpec,
  ...testSpec,
  paths: {
    ...memorySpec.paths,
    ...testSpec.paths,
  },
  // Add more specifications if needed
};

// Swagger options
const options = {
  swaggerDefinition: combinedSpec,
  apis: ['./routes/*.js'], // Add your API files here
};

// Initialize swagger-jsdoc
const swaggerSpecs = swaggerJsdoc(options);

// ℹ️ Handles http requests (express is node js framework)
// https://www.npmjs.com/package/express
const app = express();

// ℹ️ This function is getting exported from the config folder. It runs most pieces of middleware
// (logger, body-parser etc)
middlewareConfig(app);

// ℹ️ --- ROUTES ---
app.use('/api', indexRoutes);
app.use('/auth', authRoutes);
app.use('/api', familyRoutes);
app.use('/api', memoryRoutes);
app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(swaggerSpecs));

// ❗ To handle errors. Routes that don't exist or errors that you handle in specific routes
errorHandler(app);

// Sets the PORT for our app to have access to it. If no env has been set, we hard code it to 5005
const PORT = process.env.PORT || 5005;

app.listen(PORT, () => {
  console.log(`Server listening on http://localhost:${PORT}`);
});

export default app;