app/api/run/route.ts

import { NextResponse } from 'next/server';
import { exec } from 'child_process';
import { promisify } from 'util';

const execAsync = promisify(exec);

export async function POST(req: Request) {
  try {
    const { command } = await req.json();

    if (!command) {
      return NextResponse.json({ error: "No command provided" }, { status: 400 });
    }

    // SECURITY WARNING: This allows executing ANY command on the container.
    // Ideally, for a real app, you would whitelist commands here.
    
    // Execute the custom command in the shell
    // timeout: 10000ms (10 seconds) to prevent hanging
    const { stdout, stderr } = await execAsync(command, { timeout: 10000 });

    return NextResponse.json({
      output: stdout || stderr, // Return whichever has content
      type: stderr ? "stderr" : "stdout"
    });

  } catch (error: any) {
    // If the command fails (e.g. syntax error in shell), return that
    return NextResponse.json({ 
      output: error.message || error.stderr || "Unknown Error",
      type: "error"
    });
  }
}