import type { Express } from "express";
import express, { application } from 'express';
import Path from 'path';

function notStupidParseInt(v: string | undefined): number {
    return v === undefined ? NaN : parseInt(v);
}

const app: Express = express();
const port: number = notStupidParseInt(process.env.PORT) || 8080;
const dataPath: string = process.env.CONFIG || Path.join('config', 'config.json');

app.set('trust proxy', 1);
app.set('view engine', 'ejs');
app.set('view options', { outputFunctionName: 'echo' });
app.use('/assets', express.static('assets'));

let visitCount = (await Bun.file(dataPath).json())['visits'] as number || 0;

app.get('/healthcheck', (req, res) => {
    res.send('Healthy');
});

app.get('/', (req, res) => {
    console.log(req.headers['user-agent']);
    res.render('index',
        {
            visitCount
        },
        function (err, html) {
            if (!err) {
                res.send(html);
            }
            else {
                console.error(err);
                res.status(500).send('Something went wrong. Please try again later.');
            }
        });
});

const sendPixel = (_: express.Request, res: express.Response) => {
    res.set('Cache-Control', 'private, max-age=31557600'); // one year
    visitCount++;
    res.sendFile(Path.join(import.meta.dir, 'assets', 'webp', 'cache-me.webp'));
}

app.get('/cache-me.webp', sendPixel);
app.get('/cache-me-2.webp', sendPixel);

app.all('*', (req, res) => {
    console.log(`404: ${req.url} requested by ${req.ip} "${req.headers['user-agent']}"`);
    res.redirect('/');
});

const webserver = app.listen(port, () => console.log(`jakehurwitzisabitch.com running on port ${port}`));

async function saveVisits() {
    await Bun.write(dataPath, JSON.stringify({
        visits: visitCount
    }));
}

let inverval = setInterval(saveVisits, 1800000);

process.on('SIGTERM', async () => {
    clearInterval(inverval);
    console.log('writing visit count...');
    await saveVisits();
    console.log('done. shutting down...');
    webserver.close();
});