import * as createError from 'http-errors';
import * as express from 'express';
import {NextFunction, Request, Response} from 'express';
import * as path from 'path';
import * as sassMiddleware from 'node-sass-middleware';
import * as compression from 'compression';
import indexRouter from './routes';
import {AuthProxy, AutoReloader, DefaultConfig, HttpLogger, Polyfill, PermManager} from 'pkg-express-utils';

export const app = express();

// Permissions
PermManager
  .grant('user')
    .execute('read').on('userinfo')
  .grant('coe_bs')
    .extend('user')
    .execute('write').on('userinfo');

// view engine setup
app.set('views', path.join(__dirname, '../views'));
app.set('view engine', 'pug');
app.use((req, res, next) => {
  res.locals.DefaultConfig = DefaultConfig;
  next();
});

// http logger
app.use(HttpLogger);
app.use(express.json());
app.use(express.urlencoded({extended: false}));

// compression
app.use(compression());

const router = express.Router();

// auth proxy middleware
router.use(AuthProxy.router);
// auto reloader (when running in debug mode)
router.use(AutoReloader.getRouter({
  frontendDirs: './public',
}));

// session
//router.use(Session.getRouter());

// static config
router.use('/js/polyfill.js', Polyfill.getRouter('./public/js/bundle.js'));
router.use(sassMiddleware({
  src: path.join(__dirname, '../../public'),
  dest: path.join(__dirname, '../../public'),
  indentedSyntax: true, // true = .sass and false = .scss
  sourceMap: true,
}));
router.use(express.static(path.join(__dirname, '../../public')));

router.use(indexRouter);
app.use(DefaultConfig.BASE_PATH, router);

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

// error handler
app.use((err: Error&{status?: number}, req: Request, res: Response, next: NextFunction) => {
  if (res.headersSent) {
    return next(err);
  }
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = !DefaultConfig.isProduction ? err : {};

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