import { getPortkeyHeader, isEmpty } from '../utils';

export const createHeaders = (
  config: Record<string, any>
): Record<string, string> => {
  const headers: Record<string, string> = {};
  let forwardHeaders: string[] = [];

  if (config['forwardHeaders']) {
    // logic to convert forwardHeaders values to kebab-case
    forwardHeaders = config['forwardHeaders'].map((header: string) => {
      return header
        .replace('ID', 'Id')
        .replace(/[A-Z]/g, (letter) => `-${letter.toLowerCase()}`);
    });
  }

  for (let k in config) {
    let v = config[k];
    if (isEmpty(v)) continue;

    // convert to snakecase
    if (k.toLocaleLowerCase() === 'authorization') {
      headers[k.toLowerCase()] = v || '';
      continue;
    }

    // false logic (type is boolean, to handle flasy logic)
    if (typeof v === 'boolean') {
      v = v.toString();
    }

    // logic to handle forwardHeaders into a comma separated string
    if (k === 'forwardHeaders') {
      v = v.join(',');
    }

    k = k
      .replace('ID', 'Id')
      .replace(/[A-Z]/g, (letter) => `-${letter.toLowerCase()}`);
    if (!isEmpty(v) && typeof v == 'object') {
      v = JSON.stringify(v);
    }
    if (forwardHeaders && forwardHeaders.includes(k)) {
      headers[k] = v || '';
    } else {
      headers[getPortkeyHeader(k)] = v || '';
    }
  }
  return headers;
};