import express from 'express';
import ping from 'ping';
import 'dotenv/config';


const app = express();
const PORT = process.env.PORT;


async function startPing(ips, res) {
  try {
    const pingResults = await Promise.all(
      ips.map(async (ip) => {
        try {
          const result = await ping.promise.probe(ip);
          if (result.alive == 1){
            return { 
              status: 200,
              time: new Date().toISOString(),
              result: [ {
                target: ip,
                alive: result.alive ? 1 : 0,
                "time ms": result.time + ' ms',
                output: result.output,
              }
              ]
            };
          } else {
            return { 
              status: 503,
              time: new Date().toISOString(),
              result: [ {
                target: ip,
                alive: result.alive ? 1 : 0,
                "time ms": result.time + ' ms',
                "status": "error",
                "message": "Network Unreachable",
                output: result.output
              }
              ]
            };
          }
        } catch (error) {
          return {
            target: ip,
            error: error.message,
          };
        }
      })
    );
    res.json(pingResults);
  } catch (error) {
    res.status(500).json({ error: 'Server error', details: error.message });
  }
}

// Endpoint to check ping status
app.get('/ping', async (req, res) => {
  try {
    const IPs = process.env.TARGET_IPS ? process.env.TARGET_IPS.split(',').map(ip => ip.trim()) : [];
    if (IPs.length === 0) {
      return res.status(400).json({ error: 'No target IPs configured in .env' });
    }
    startPing(IPs, res);
  } catch (error) {
    res.status(500).json({ error: 'Failed to ping', details: error.message });
  }
});

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