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

const app = express();
const cors = require("cors");

app.use(cors());
const port = 6823;

// Function to help determine asset paths when using pkg
function getPublicPath() {
  if (process.pkg) {
    return path.join(path.dirname(process.execPath), 'web');
  } else {
    return path.join(__dirname, 'web');
  }
}

const publicDirectory = getPublicPath();
app.use(express.static(publicDirectory));

// Middleware to parse JSON request bodies
app.use(express.json());

// Endpoint 1: Get address
app.get('/read-config', (req, res) => {
  const filePath = path.join(path.dirname(process.execPath), 'ip_and_port.json');
  if (fs.existsSync(filePath)) {
    const data = fs.readFileSync(filePath, 'utf8');
    const address = JSON.parse(data);
    res.json(address);
  } else {
    res.json({});
  }
});

// Endpoint 2: Save address
app.post('/update-config', (req, res) => {
  const { ip, port } = req.body;

  const ip_and_port = { ip, port };
  const filePath = path.join(path.dirname(process.execPath), 'ip_and_port.json');

  // Ensure the file exists and write data
  fs.writeFileSync(filePath, JSON.stringify(ip_and_port, null, 2), 'utf8');
  res.json({ message: 'Address saved successfully' });
});

// Catch-all to serve index.html for SPA routing
app.get('*', (req, res) => {
  res.sendFile(path.join(publicDirectory, 'index.html'));
});

app.listen(port, () => {
  console.log(`Server is running on port ${port}`);
});