/**
 * 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 (query_range) 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/i18n/no-non-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)
  );
};

export default {};
