import Ember from 'ember';
import { createInitialComplianceInfo } from 'wherehows-web/utils/datasets/compliance-policy';
import { datasetUrlById } from 'wherehows-web/utils/api/datasets/shared';
import { ApiStatus } from 'wherehows-web/utils/api/shared';
import { IComplianceSuggestion, IComplianceSuggestionResponse } from 'wherehows-web/typings/api/datasets/compliance';

const { $: { getJSON }, assert } = Ember;

/**
 * Constructs the dataset compliance url
 * @param {number} id the id of the dataset
 * @return {string} the dataset compliance url
 */
const datasetComplianceUrlById = (id: number): string => `${datasetUrlById(id)}/compliance`;

/**
 * Constructs the compliance suggestions url based of the compliance id
 * @param {number} id the id of the dataset
 * @return {string} compliance suggestions url
 */
const datasetComplianceSuggestionsUrlById = (id: number): string => `${datasetComplianceUrlById(id)}/suggestions`;

/**
 * Fetches the current compliance policy for a dataset with thi given id
 * @param {number} id the id of the dataset
 * @return {Promise<{isNewComplianceInfo: boolean, complianceInfo: *}>}
 */
const readDatasetCompliance = async (id: number): Promise<{ isNewComplianceInfo: boolean; complianceInfo: any }> => {
  assert(`Expected id to be a number but received ${typeof id}`, typeof id === 'number');
  const notFound = 'No entity found for query';
  // complianceInfo contains the compliance data for the specified dataset
  let {
    msg = '',
    status,
    complianceInfo
  }: { msg: string; status: ApiStatus; complianceInfo: any } = await Promise.resolve(
    getJSON(datasetComplianceUrlById(id))
  );
  // If the endpoint responds with a failed status, and the msg contains the indicator that a compliance does not exist
  const isNewComplianceInfo: boolean = status === ApiStatus.FAILED && String(msg).includes(notFound);

  if (isNewComplianceInfo) {
    complianceInfo = createInitialComplianceInfo(id);
  }

  return { isNewComplianceInfo, complianceInfo };
};

/**
 * Requests the compliance suggestions for a given dataset Id and returns the suggestion list
 * @param {number} id the id of the dataset
 * @return {Promise<IComplianceSuggestion>}
 */
const readDatasetComplianceSuggestion = async (id: number): Promise<IComplianceSuggestion> => {
  const { complianceSuggestion = <IComplianceSuggestion>{} }: IComplianceSuggestionResponse = await Promise.resolve(
    getJSON(datasetComplianceSuggestionsUrlById(id))
  );
  return complianceSuggestion;
};

export { readDatasetCompliance, readDatasetComplianceSuggestion, datasetComplianceUrlById };