import { CLAWBOOK_API_URL } from "./constants";
import { createIdentity, getIdKey } from "./identity";

let _cached: { idKey: string; name: string } | undefined | null = null;

/**
 * Derive bot identity from SIGMA_MEMBER_WIF.
 * Fetches display name from on-chain BAP identity via profile API.
 * Cached after first successful call. Returns undefined if WIF is missing or invalid.
 */
export async function getBotIdentity(): Promise<
	{ idKey: string; name: string } | undefined
> {
	if (_cached !== null) return _cached;
	const wif = process.env.SIGMA_MEMBER_WIF;
	if (!wif) {
		_cached = undefined;
		return undefined;
	}
	try {
		const identity = createIdentity(wif);
		const idKey = getIdKey(identity);
		let name = idKey.slice(0, 8);
		try {
			const res = await fetch(
				`${CLAWBOOK_API_URL}/api/profiles/${encodeURIComponent(idKey)}`,
			);
			const data = await res.json();
			if (data?.data?.identity?.alternateName) {
				name = data.data.identity.alternateName;
			}
		} catch {
			/* use truncated idKey as fallback */
		}
		_cached = { idKey, name };
		return _cached;
	} catch {
		_cached = undefined;
		return undefined;
	}
}