import express, { Express, Request, Response } from 'express';
import dotenv from 'dotenv'
import routes from './routes'
import { errorHandler } from './util/errorHandler'
import { wsServer } from './routes/proxyRoute';
import compression from 'compression'
import { cors } from './util/cors';
import { execSync } from 'child_process';

dotenv.config()

// define version as current commit
const version = execSync('git rev-parse HEAD')
.toString().trim()

const app: Express = express();
const port = process.env.PORT

app.use(cors())
app.use(compression({}))
app.use(routes)

// main endpoint
app.get('/', (req: Request, res: Response) => {
  res.send({
    status: 'ok',
    message: `SafeTwitch Backend on commit ${version}. If you meant to use SafeTwitch, you're at the wrong URL`
  })
})


// 404 handler
app.use((req, res) => {
  if (!res.headersSent) {
    res.status(404).send('404')
  }
});

// handle errors
app.use(errorHandler)

const server = app.listen(port, () => {
  console.log(`SafeTwitch commit ${version} started on port ${port}`)
})

server.on('upgrade', (request, socket, head) => {
  wsServer.handleUpgrade(request, socket, head, socket => {
    wsServer.emit('connection', socket, request);
  });
});

// don't crash on unhandledRejection
process.on('unhandledRejection', (reason: Error, p) => {});