import * as FS from 'node:fs';

// This package's package.json — beside the sources on disk, and beside them
// inside the archive too: the version, and where its OAuth client lives.

interface PackageInfo {
    version: string;
    /**
     * The hosted OAuth client documents to try, in order, with `{version}`
     * standing for the version: this release's own first, then fallbacks.
     */
    oauthClients: string[];
}

let cached: PackageInfo | undefined;

export function packageInfo(): PackageInfo {
    if (!cached) {
        try {
            const json = JSON.parse(FS.readFileSync(new URL('../package.json', import.meta.url), 'utf-8')) as { version?: string; atcli?: { oauthClients?: string[] } };
            const version = String(json.version ?? '0.0.0');
            cached = { version, oauthClients: (json.atcli?.oauthClients ?? []).map((template) => template.replaceAll('{version}', version)) };
        } catch {
            cached = { version: '0.0.0', oauthClients: [] };
        }
    }
    return cached;
}

export function version(): string {
    return packageInfo().version;
}