# Instalación de dependencias
npm install express body-parser mongoose

const express = require('express');
const bodyParser = require('body-parser');

const app = express();
app.use(bodyParser.json());

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});

const books = [];

app.get('/books', (req, res) => {
    res.status(200).json(books);
});

app.post('/books', (req, res) => {
    const book = req.body;
    books.push(book);
    res.status(201).json(book);
});

app.put('/books/:id', (req, res) => {
    const { id } = req.params;
    const updatedBook = req.body;
    books[id] = updatedBook;
    res.status(200).json(updatedBook);
});

app.delete('/books/:id', (req, res) => {
    const { id } = req.params;
    books.splice(id, 1);
    res.status(204).send();
});

swagger: '2.0'
info:
  version: "1.0.0"
  title: "Library API"
paths:
  /books:
    get:
      summary: "Get all books"
      responses:
        200:
          description: "A list of books"
    post:
      summary: "Add a new book"
      parameters:
        - in: "body"
          name: "book"
          description: "The book to add"
          required: true
          schema:
            type: "object"
            properties:
              title:
                type: "string"
              author:
                type: "string"
      responses:
        201:
          description: "Book added"
  /books/{id}:
    put:
      summary: "Update a book"
      parameters:
        - in: "path"
          name: "id"
          required: true
          type: "integer"
        - in: "body"
          name: "book"
          description: "The updated book"
          required: true
          schema:
            type: "object"
            properties:
              title:
                type: "string"
              author:
                type: "string"
      responses:
        200:
          description: "Book updated"
    delete:
      summary: "Delete a book"
      parameters:
        - in: "path"
          name: "id"
          required: true
          type: "integer"
      responses:
        204:
          description: "Book deleted"

const jwt = require('jsonwebtoken');

app.post('/login', (req, res) => {
    const { username, password } = req.body;
    // Verificación de usuario (simplificada)
    if (username === 'admin' && password === 'password') {
        const token = jwt.sign({ username }, 'secret_key');
        res.status(200).json({ token });
    } else {
        res.status(401).send('Unauthorized');
    }
});

const authenticate = (req, res, next) => {
    const token = req.headers['authorization'];
    if (token) {
        jwt.verify(token, 'secret_key', (err, decoded) => {
            if (err) {
                return res.status(401).send('Unauthorized');
            } else {
                req.user = decoded;
                next();
            }
        });
    } else {
        res.status(401).send('Unauthorized');
    }
};

app.use(authenticate);

const request = require('supertest');
const app = require('../app'); // Asumiendo que tu app está exportada en app.js

describe('GET /books', () => {
    it('should return a list of books', (done) => {
        request(app)
            .get('/books')
            .expect(200)
            .expect((res) => {
                res.body.should.be.an.Array();
            })
            .end(done);
    });
});