import { execFileSync, spawn } from 'node:child_process';
import { join } from 'node:path';

const FA2JSON = new URL('../../build/fa2json', import.meta.url).pathname;

export async function setup() {
	// Create image file and format
	const img = execFileSync('mktemp', ['/tmp/fa2json-test-XXXXXX.img']).toString().trim();
	execFileSync('truncate', ['-s', '10M', img]);
	execFileSync('mkfs.ext4', ['-q', img]);

	// Create mount point and mount
	const mnt = execFileSync('mktemp', ['-d', '/tmp/fa2json-mnt-XXXXXX']).toString().trim();
	execFileSync('sudo', ['mount', img, mnt]);

	// Hand ownership to current user, then sync before fa2json starts
	execFileSync('sudo', ['chown', String(process.getuid()), mnt]);
	execFileSync('sync');

	async function teardown() {
		try { execFileSync('sudo', ['umount', mnt]); } catch {}
		try { execFileSync('rm', ['-f', img]); } catch {}
		try { execFileSync('rmdir', [mnt]); } catch {}
	}

	return { img, mnt, teardown };
}

export function spawnFa2json(mnt) {
	return spawn('sudo', [FA2JSON, mnt], { stdio: ['ignore', 'pipe', 'inherit'] });
}