const express = require("express");
const path = require("path");
const app = express();
const fs = require("fs/promises");
const cheerio = require("cheerio");
const { File } = require('fetch-blob');
global.File = File;

const PORT = process.env.PORT || 3000;

app.get('/', (req, res) => {
  const url = 'https://www.spsejecna.cz/';
  const cookies = `JSESSIONID=${req.query.session}; WTDGUID=10`;

  fetch(url, {
    method: 'GET',
    headers: {
      'Cookie': cookies
    }
  })
    .then(res => res.text())
    .then(data => {
      const $ = cheerio.load(data);
      const firstLabelText = $('.label.label-icon').first().text().trim();

      if (firstLabelText == "Přihlášení") {
        return res.status(403).send("Not logged in!");
      }

      res.sendFile(path.join(__dirname, "db", "current.json"));
    })
    .catch(err => {
      console.error('Fetch error:', err);
      res.status(500).send();
    });
});

app.get("/status", async (_, res) => {
  const dataStr = await fs.readFile(path.resolve("./volume/customState.json"), {encoding: "utf8"});
  const data = JSON.parse(dataStr);

  if (data.working) {
    res.json({working: true})
  } else {
    res.json({working: data.working, message: data.message})
  }
})

// TODO: Reporting errors

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