import { queryToObject, mergeUrlParams, removeParams } from '~/lib/utils/url_utility';
import {
  timeRangeParamNames,
  timeRangeFromParams,
  timeRangeToParams,
} from '~/lib/utils/datetime_range';

/**
 * This method is used to validate if the graph data format for a chart component
 * that needs a time series as a response from a prometheus query (queryRange) is
 * of a valid format or not.
 * @param {Object} graphData  the graph data response from a prometheus request
 * @returns {boolean} whether the graphData format is correct
 */
export const graphDataValidatorForValues = (isValues, graphData) => {
  const responseValueKeyName = isValues ? 'value' : 'values';
  return (
    Array.isArray(graphData.metrics) &&
    graphData.metrics.filter(query => {
      if (Array.isArray(query.result)) {
        return (
          query.result.filter(res => Array.isArray(res[responseValueKeyName])).length ===
          query.result.length
        );
      }
      return false;
    }).length === graphData.metrics.filter(query => query.result).length
  );
};

/* eslint-disable @gitlab/require-i18n-strings */
/**
 * Checks that element that triggered event is located on cluster health check dashboard
 * @param {HTMLElement}  element to check against
 * @returns {boolean}
 */
const isClusterHealthBoard = () => (document.body.dataset.page || '').includes(':clusters:show');

/**
 * Tracks snowplow event when user generates link to metric chart
 * @param {String}  chart link that will be sent as a property for the event
 * @return {Object} config object for event tracking
 */
export const generateLinkToChartOptions = chartLink => {
  const isCLusterHealthBoard = isClusterHealthBoard();

  const category = isCLusterHealthBoard
    ? 'Cluster Monitoring'
    : 'Incident Management::Embedded metrics';
  const action = isCLusterHealthBoard
    ? 'generate_link_to_cluster_metric_chart'
    : 'generate_link_to_metrics_chart';

  return { category, action, label: 'Chart link', property: chartLink };
};

/**
 * Tracks snowplow event when user downloads CSV of cluster metric
 * @param {String}  chart title that will be sent as a property for the event
 * @return {Object} config object for event tracking
 */
export const downloadCSVOptions = title => {
  const isCLusterHealthBoard = isClusterHealthBoard();

  const category = isCLusterHealthBoard
    ? 'Cluster Monitoring'
    : 'Incident Management::Embedded metrics';
  const action = isCLusterHealthBoard
    ? 'download_csv_of_cluster_metric_chart'
    : 'download_csv_of_metrics_dashboard_chart';

  return { category, action, label: 'Chart title', property: title };
};

/**
 * Generate options for snowplow to track adding a new metric via the dashboard
 * custom metric modal
 * @return {Object} config object for event tracking
 */
export const getAddMetricTrackingOptions = () => ({
  category: document.body.dataset.page,
  action: 'click_button',
  label: 'add_new_metric',
  property: 'modal',
});

/**
 * This function validates the graph data contains exactly 3 metrics plus
 * value validations from graphDataValidatorForValues.
 * @param {Object} isValues
 * @param {Object} graphData  the graph data response from a prometheus request
 * @returns {boolean} true if the data is valid
 */
export const graphDataValidatorForAnomalyValues = graphData => {
  const anomalySeriesCount = 3; // metric, upper, lower
  return (
    graphData.metrics &&
    graphData.metrics.length === anomalySeriesCount &&
    graphDataValidatorForValues(false, graphData)
  );
};

/**
 * Returns a time range from the current URL params
 *
 * @returns {Object|null} The time range defined by the
 * current URL, reading from search query or `window.location.search`.
 * Returns `null` if no parameters form a time range.
 */
export const timeRangeFromUrl = (search = window.location.search) => {
  const params = queryToObject(search);
  return timeRangeFromParams(params);
};

/**
 * Returns a URL with no time range based on the current URL.
 *
 * @param {String} New URL
 */
export const removeTimeRangeParams = (url = window.location.href) =>
  removeParams(timeRangeParamNames, url);

/**
 * Returns a URL for the a different time range based on the
 * current URL and a time range.
 *
 * @param {String} New URL
 */
export const timeRangeToUrl = (timeRange, url = window.location.href) => {
  const toUrl = removeTimeRangeParams(url);
  const params = timeRangeToParams(timeRange);
  return mergeUrlParams(params, toUrl);
};

export default {};