// Load required modules
const http = require("http");                 // http server core module
const path = require("path");
const express = require("express");           // web framework external module
const spawn  = require('child_process').spawn;

// Get port or default to 8080
const port = process.env.PORT || 8082;

// Setup and configure Express http server.
const app = express();
app.use(express.static(path.resolve(__dirname, "..", "examples")));

const instructions = `
/home/deck/.ssh/
/home/deck/.ssh/authorized_keys
/home/deck/.ssh/id_rsa_steamdeck
/home/deck/.ssh/known_hosts
/home/deck/.ssh/config
/home/deck/.ssh/id_rsa_steamdeck.pub
/home/deck/.ssh/known_hosts.old
	trusted context, i.e on closed WiFi, still. check on bearer

/home/deck/server.locatedb
/home/deck/desktop.plocate.db
	should be queriable via http with json output

ssh remarkable2 to  get draweiong previw
	conversion should be done, if necessary, on device

util functions
	modify WiFi parameters, including AP if available
	shutdown/reboot
`
app.get('/spawn', (req, res) => {
	res.json( spawn('ls') )
})
app.get('/services', (req, res) => {
	res.json( [
		{name:'kiwix', desc:'offline Wikipedia, Stackoverflow, etc', protocol:'http', port:8080, url:'http://192.168.4.3:8080'},
		{name:'hmdlink', desc:'share URL between local devices', protocol:'http', port:8082, path: '/hmdlink', url:'http://192.168.4.3:8082/hmdlink'},

	] )
})
app.get('/hmdlink', (req, res) => {
	res.redirect( 'https://192.168.4.1/offline.html' )
})
app.get('/json', (req, res) => {
	res.json( instructions.split('\n') )
})
app.get('/', (req, res) => {
	res.send( instructions )
})

// Start Express http server
const webServer = http.createServer(app);
// Listen on port
webServer.listen(port, () => {
    console.log("listening on http://localhost:" + port);
});