/** Back up the shared PostgreSQL container before migrating development. */
import { SQL } from 'bun';

const connection = process.env.DB_URL || process.env.DATABASE_URL;
if (!connection) throw new Error('DB_URL or DATABASE_URL is required');
const sql = new SQL(connection, { max: 1 });
let databaseName: string;
try {
	const [row] = await sql`SELECT current_database() AS name`;
	databaseName = row.name;
	if (!['vash_dev', 'vash_esports_dev'].includes(databaseName))
		throw new Error('Refusing to migrate a non-development database');
} finally {
	await sql.end();
}

const container = process.env.POSTGRES_CONTAINER || 'postgres-db-1';
if (!/^[a-zA-Z0-9_.-]+$/.test(container)) throw new Error('Invalid POSTGRES_CONTAINER');
const host = process.env.DB_BACKUP_SSH || 'ai@localhost';
if (!/^[a-zA-Z0-9_.@-]+$/.test(host)) throw new Error('Invalid DB_BACKUP_SSH');
const backup = `/home/ai/esports-${databaseName}-before-migration-${Date.now()}.dump`;
const remote = `umask 077 && docker exec -i ${container} pg_dump -U postgres -d ${databaseName} -Fc > ${backup} && docker exec -i ${container} pg_restore -l < ${backup} >/dev/null && test -s ${backup}`;
const job = Bun.spawn(['ssh', '-o', 'BatchMode=yes', host, remote], {
	stdout: 'inherit',
	stderr: 'inherit'
});
if ((await job.exited) !== 0)
	throw new Error('Backup failed or could not be verified; migration was not run');
console.log(`Verified development backup on ${host}: ${backup}`);
await import('./migrate');