import { Router } from 'express';
import { execSync } from 'child_process';
import { homedir } from 'os';
import { getHostConfigs } from '../config';

const router = Router();

interface TerminalRequest {
  host: string;
  command: string;
}

router.post('/terminal/exec', async (req, res) => {
  try {
    const { host: hostName, command }: TerminalRequest = req.body;
    
    if (!hostName || !command) {
      return res.status(400).json({ error: 'Missing host or command' });
    }

    const hosts = getHostConfigs();
    const hostConfig = hosts.find(h => h.name === hostName);
    
    if (!hostConfig) {
      return res.status(404).json({ error: `Host not found: ${hostName}` });
    }

    const keyPath = (hostConfig.sshKeyPath || `${homedir()}/.ssh/id_ed25519`).replace(/^~/, homedir());
    const keyArg = `-i ${keyPath}`;
    const portArg = hostConfig.sshPort && hostConfig.sshPort !== 22 ? `-p ${hostConfig.sshPort}` : '';
    
    const fullCommand = `ssh -o ConnectTimeout=10 -o StrictHostKeyChecking=no ${keyArg} ${portArg} ${hostConfig.sshUser}@${hostConfig.ip} ${command} 2>&1`;
    
    const output = execSync(fullCommand, { encoding: 'utf-8', timeout: 30000 });
    
    res.json({ output, error: null });
  } catch (error: any) {
    res.status(500).json({ 
      output: '', 
      error: error.message || 'Command execution failed' 
    });
  }
});

router.get('/terminal/hosts', async (_req, res) => {
  try {
    const hosts = getHostConfigs();
    res.json({ 
      hosts: hosts.map(h => ({
        name: h.name,
        ip: h.ip,
        user: h.sshUser
      }))
    });
  } catch (error: any) {
    res.status(500).json({ error: error.message });
  }
});

export default router;