import type { QueryObject } from '../../helpers/search/search';
import { normalizeSearchParams } from '../../helpers/search/search';
import { isBrowser } from '../is-browser';
const BUILDER_SEARCHPARAMS_PREFIX = 'builder.';
const BUILDER_OPTIONS_PREFIX = 'options.';

/**
 * Receives a `URLSearchParams` object or a regular query object, and returns
 * the subset of query params that are relevant to the Builder SDK.
 *
 * Outputs a key-value object to be passed to `fetchOneEntry` or `fetchEntries`
 * functions as the `options` argument.
 *
 * NOTE: This function is generally not needed. Instead, it is recommended to use `isPreviewing()`
 * to check if the current page requires previewed content.
 *
 * @returns
 */
export const getBuilderSearchParams = (_options: QueryObject | URLSearchParams | undefined) => {
  if (!_options) {
    return {};
  }
  const options = normalizeSearchParams(_options);
  const newOptions: QueryObject = {};
  Object.keys(options).forEach(key => {
    if (key.startsWith(BUILDER_SEARCHPARAMS_PREFIX)) {
      const trimmedKey = key.replace(BUILDER_SEARCHPARAMS_PREFIX, '').replace(BUILDER_OPTIONS_PREFIX, '');
      newOptions[trimmedKey] = options[key];
    }
  });
  return newOptions;
};
export const getBuilderSearchParamsFromWindow = () => {
  if (!isBrowser()) {
    return {};
  }
  const searchParams = new URLSearchParams(window.location.search);
  return getBuilderSearchParams(searchParams);
}