// Creates endpoint for caddy's ask feature (https://caddyserver.com/docs/json/apps/tls/automation/on_demand/ask/)
// Returns status 200 if domain given in ?domain= already exists in .wiki folder, otherwise it returns an error

const express = require('express');
const fs = require('fs');
const path = require('path');

const app = express();

const address = process.env.PORT || "localhost";
const port = process.env.PORT || 3000;
const dataDirectory = process.env.DIRECTORY || __dirname;

app.get('/', (req, res) => {
  const folderName = req.query.domain;

  if (!folderName) {
    return res.status(400).json({ error: `No query, don't create certificate` });
  }

  const folderPath = path.join(dataDirectory, folderName);

  fs.access(folderPath, fs.constants.F_OK, (err) => {
    if (err) {
      return res.status(404).json({ error: `${req.query.domain} doesn't exist, don't create certificate` });
    }

    return res.status(200).json({ message: `${req.query.domain} exists, create certificate` });
  });
});

app.listen(port, address, () => {
  console.log(`Server is running at http://${address}:${port}`);
});