import dotenv from 'dotenv'
dotenv.config()

import createError from 'http-errors';
import express, { static as staticRoute } from 'express';
import { join, dirname } from 'path';
import cookieParser from 'cookie-parser';
import session from 'express-session';
import bodyParser from 'body-parser';
import logger from 'morgan';
import { fileURLToPath } from 'url';
import { createServer } from 'http';

import { DBAccess } from './db/index.js';
await DBAccess.scaffold();

import indexRouter from './routes/index.js';
import userspaceRouter from './routes/userspace.js';
import gatewayRouter from './routes/gateway.js';
import adminRouter from './routes/admin.js';

const __dirname = dirname(fileURLToPath(import.meta.url));

import nssModule from 'nedb-session-store';
const NedbStore = nssModule(session);

const app = express();

// view engine setup
app.set('views', join(__dirname, 'views'));
app.set('view engine', 'hbs');

app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser("secret")); // TODO: CHANGE!
app.use(session({
  secret: "secret",
  unset: "destroy",
  resave: false,
  saveUninitialized: false,
  store: new NedbStore({
    filename: join(__dirname, 'sessions.db')
  })
}))
app.use(staticRoute(join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/gateway', gatewayRouter);
app.use('/admin', adminRouter);
app.use('/userspace', userspaceRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

const port = normalizePort(process.env.PORT || '3000');
app.set('port', port);

/**
 * Create HTTP server.
 */

const server = createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(port);
server.on('error', onError);
server.on('listening', onListening);

/**
 * Normalize a port into a number, string, or false.
 */

function normalizePort(val) {
  const port = parseInt(val, 10);

  if (isNaN(port)) {
    // named pipe
    return val;
  }

  if (port >= 0) {
    // port number
    return port;
  }

  return false;
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError(error) {
  if (error.syscall !== 'listen') {
    throw error;
  }

  const bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port;

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      console.error(bind + ' is already in use');
      process.exit(1);
      break;
    default:
      throw error;
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening() {
  const addr = server.address();
  const bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port;
  console.log('Listening on ' + bind);
}