import destr from 'destr';

// convert NIP-02 to array of pubkey
export const nip02ToArray = (tags: string[]) => {
  const arr = [];
  tags.forEach((item) => {
    arr.push(item[1]);
  });
  return arr;
};

// convert array to NIP-02 tag list
export const arrayToNIP02 = (arr: string[]) => {
  const nip02_arr = [];
  arr.forEach((item) => {
    nip02_arr.push(['p', item]);
  });

  return nip02_arr;
};

// get parent id from event tags
export const getParentID = (arr: string[], fallback: string) => {
  const tags = destr(arr);
  let parentID = fallback;

  if (tags.length > 0) {
    if (tags[0][0] === 'e' || tags[0][2] === 'root' || tags[0][3] === 'root') {
      parentID = tags[0][1];
    } else {
      tags.forEach((tag) => {
        if (tag[0] === 'e' && (tag[2] === 'root' || tag[3] === 'root')) {
          parentID = tag[1];
        }
      });
    }
  }

  return parentID;
};