import keyBy from 'lodash/keyBy';

import {getInterval} from 'sentry/components/charts/utils';
import {PageFilters} from 'sentry/types';
import {Series} from 'sentry/types/echarts';
import EventView from 'sentry/utils/discover/eventView';
import {DiscoverDatasets} from 'sentry/utils/discover/types';
import {MutableSearch} from 'sentry/utils/tokenizeSearch';
import usePageFilters from 'sentry/utils/usePageFilters';
import {SpanMetricsQueryFilters} from 'sentry/views/starfish/types';
import {STARFISH_CHART_INTERVAL_FIDELITY} from 'sentry/views/starfish/utils/constants';
import {useSpansQuery} from 'sentry/views/starfish/utils/useSpansQuery';
import {EMPTY_OPTION_VALUE} from 'sentry/views/starfish/views/spans/selectors/emptyOption';

export type SpanMetrics = {
  interval: number;
  'p95(span.self_time)': number;
  'spm()': number;
  'sum(span.self_time)': number;
  'time_spent_percentage()': number;
};

export const useSpanMetricsSeries = (
  filters: SpanMetricsQueryFilters,
  yAxis: string[] = [],
  referrer = 'span-metrics-series'
) => {
  const pageFilters = usePageFilters();

  const eventView = getEventView(filters, pageFilters.selection, yAxis);

  const enabled = Object.values(filters).every(value => Boolean(value));

  const result = useSpansQuery<SpanMetrics[]>({
    eventView,
    initialData: [],
    referrer,
    enabled,
  });

  const parsedData = keyBy(
    yAxis.map(seriesName => {
      const series: Series = {
        seriesName,
        data: (result?.data ?? []).map(datum => ({
          value: datum[seriesName],
          name: datum.interval,
        })),
      };

      return series;
    }),
    'seriesName'
  );

  return {...result, data: parsedData};
};

function getEventView(
  filters: SpanMetricsQueryFilters,
  pageFilters: PageFilters,
  yAxis: string[]
) {
  const query = new MutableSearch('');

  Object.entries(filters).forEach(([key, value]) => {
    if (!value) {
      return;
    }

    if (value === EMPTY_OPTION_VALUE) {
      query.addFilterValue('!has', key);
    }

    query.addFilterValue(key, value, !ALLOWED_WILDCARD_FIELDS.includes(key));
  });

  // TODO: This condition should be enforced everywhere
  // query.addFilterValue('has', 'span.description');

  return EventView.fromNewQueryWithPageFilters(
    {
      name: '',
      query: query.formatString(),
      fields: [],
      yAxis,
      dataset: DiscoverDatasets.SPANS_METRICS,
      interval: getInterval(pageFilters.datetime, STARFISH_CHART_INTERVAL_FIDELITY),
      version: 2,
    },
    pageFilters
  );
}

const ALLOWED_WILDCARD_FIELDS = ['span.description'];