import NDK from "@nostr-dev-kit/ndk";
import * as crypto from "node:crypto";
import {decodeHex} from "@std/encoding/hex";

export * from "./logs.ts";
export * from "../models.ts";

export function getNDK() {
  return new NDK({
    explicitRelayUrls: [
      "wss://relay.primal.net",
      "wss://relay.nostr.band",
      "wss://offchain.pub",
    ],
    autoConnectUserRelays: false,
    enableOutboxModel: true,
  });
}

/**
 * Derive a nostr private key from a master private key and an email address.
 *
 * This is done by taking the SHA-256 hash of the email address, and then taking
 * the SHA-256 hash of the master private key concatenated with the email hash.
 * The resulting hash is the nostr private key.
 *
 * @param masterNsec - The master nostr private key.
 * @param email - The email address.
 * @returns The nostr private key derived from the master key and email address as a uint8array.
 */
export function deriveNsecForEmail(
  masterNsec: string,
  email: string,
): Uint8Array {
  const masterNsecHash = crypto.createHash("sha256").update(masterNsec).digest(
    "hex",
  );
  const emailHash = crypto.createHash("sha256").update(email).digest("hex");
  const sharedSecret = crypto.createHash("sha256").update(
    masterNsecHash + emailHash,
  ).digest("hex");
  return decodeHex(sharedSecret);
}