import type { Key } from "npm:openpgp@^6.1.1";
import { createKeysFromDir } from "./create.ts";
import type { AsyncYieldType } from "../../utils/iterator.ts";
import { equal, getCall } from "../../utils/anonymous.ts";
import { env } from "../environment.ts";

let trusted:
  | Iterable<AsyncYieldType<ReturnType<typeof createKeysFromDir>>>
  | undefined = undefined;

const fingerprints = () =>
  // deno-lint-ignore no-undef
  Iterator.from(trusted ?? []).map(getCall("getFingerprint"));

export async function keyTrust(key: Key): Promise<number> {
  if (trusted === undefined) {
    trusted = await Array.fromAsync(createKeysFromDir(env.TRUSTED_KEYS_DIR));
  }
  return fingerprints().some(equal(key.getFingerprint())) ? 255 : 0;
}