import { readFile } from 'node:fs/promises';
import { resolve } from 'node:path';

/** adapter-node copies public assets to build/client; Vite serves static in development. */
export async function agentReleaseAsset(file: 'install.sh' | 'ec-agent.py' | 'ec-agent-update.py' | 'manifest.json'): Promise<string> {
    // A prior production build must never shadow a freshly packaged development release.
    if (process.env.NODE_ENV === 'development') return readFile(resolve('static/agent', file), 'utf8');
    try { return await readFile(resolve('build/client/agent', file), 'utf8'); }
    catch (cause) {
        if ((cause as NodeJS.ErrnoException).code !== 'ENOENT') throw cause;
        return readFile(resolve('static/agent', file), 'utf8');
    }
}