// set up a basic API for MySQL
// this is a simple API that will allow us to do basic CRUD operations on our MySQL database

// import the express module
const express = require('express');
const cors = require('cors')

// create an express app
const app = express();

// enable cors
var corsOptions = {
  // origin: "http://localhost:5173"
};
// app.use(cors(corsOptions));
app.use(cors());

// parse requests of content-type - application/json
app.use(express.json());

// parse requests of content-type - application/x-www-form-urlencoded
app.use(express.urlencoded({ extended: true }));

// include all routes
const os = require('os');
const fs = require('fs');
const path = require('path');

const routesPath = path.join(__dirname, 'db/routes');
const routeFiles = fs.readdirSync(routesPath);

// auth providers
const bearerToken = require('express-bearer-token');
// const { expressjwt: jwt } = require("express-jwt");

for (const file of routeFiles) {
  const { apiPath, apiRouter } = require(path.join(routesPath, file));

  app.use(
    apiPath,
    // JWT Bearer token
    // jwt({
    //   secret: process.env.JWT_SECRET,
    //   algorithms: ["HS256"],
    // }),
    // function (err, req, res, next) {
    //   if (err.name === "UnauthorizedError") {
    //     res.status(401).send("invalid token!");
    //   } else {
    //     next(err);
    //   }
    // },
    // simple plaintext Bearer token
    bearerToken(),
    function (req, res, next) {
      if (req.token === process.env.BEARER_TOKEN) {
        next();
      } else {
        res.status(401).send("invalid token!");
      }
    },
    apiRouter
  );
}

// sync/init database
const db = require('./db');
const dbConfig = require("./db/config.js");
// if database doesn't exist, create it
db.instance.query('CREATE DATABASE IF NOT EXISTS ' + dbConfig.DATABASE)
  .then(() => {
    console.log('Database created')
    db.instance.sync({
      force: true
    });
  })
  .then(() => {

    // configure api docs
    const swaggerUi = require('swagger-ui-express');
    const YAML = require('yamljs');
    const swaggerDocument = YAML.load('openapi.yaml');
    // local YAML
    // app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(swaggerDocument, {
    //   explorer: true
    // }));

    // converted from Postman
    app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(swaggerDocument, {
      explorer: true
    }));

    Promise.resolve()
  }).then(() => {

    // set port, listen for requests
    app.listen(3000, function () {
      console.log('App running on port ' + 3000);
    });

  }).catch((err) => {
    console.log(err);
  });