import { nip19, NostrEvent } from "nostr-tools";
import { isReplaceable } from "./event.js";

export function getSharableEventAddress(event: NostrEvent, relays?: Iterable<string>) {
  if (isReplaceable(event.kind)) {
    const d = event.tags.find((t) => t[0] === "d" && t[1])?.[1];
    if (!d) return null;
    return nip19.naddrEncode({
      kind: event.kind,
      identifier: d,
      pubkey: event.pubkey,
      relays: relays && Array.from(relays),
    });
  } else {
    return nip19.neventEncode({
      id: event.id,
      kind: event.kind,
      relays: relays && Array.from(relays),
      author: event.pubkey,
    });
  }
}