import express from 'express';

import morgan from 'morgan';

import cookieParser from 'cookie-parser';

import bodyParser from 'body-parser';

import * as controllers from '/controllers';

import { ClientError, ForbiddenError, NotFoundError, UnauthorizedError } from '/common/error';

import webhook from '/common/webhook';

import hierarchy from '/common/hierarchy';

const app = express();

app.use(morgan('tiny'));

app.use(cookieParser());

app.use(bodyParser.json());

app.use(bodyParser.urlencoded({ extended: true }));

Object.keys(controllers).forEach(key => app.use(`/${key}`, controllers[key]));

app.use('/webhook', webhook);

app.use((req, res, next) => next(new NotFoundError()));

app.use((err, req, res, next) => {

const statusMap = [

[UnauthorizedError, 401],

[ForbiddenError, 403],

[NotFoundError, 404],

[ClientError, 400],

[Error, 500],

];

const [, status] = statusMap.find(([Error]) => err instanceof Error);

res.status(status);

res.send(err.message);

console.error(err);

});

app.hierarchy = hierarchy;

webhook.on('algorithm-visualizer', event => {

switch (event) {

case 'push':

process.exit(0);

break;

}

});

export default app;