...

import { isEqual } from 'lodash';
import { memo, useEffect, useMemo, useState } from 'react';
import { usePrevious } from 'react-use';

import { DataSourceApi, getDefaultTimeRange, LoadingState, PanelData, SelectableValue, TimeRange } from '@grafana/data';
import {
  EditorRow,
  LabelFilters,
  OperationExplainedBox,
  OperationList,
  OperationListExplained,
  OperationsEditorRow,
  QueryBuilderHints,
  RawQuery,
  QueryBuilderLabelFilter,
  QueryBuilderOperation,
} from '@grafana/plugin-ui';

import { testIds } from '../../components/LokiQueryEditor';
import { LokiDatasource } from '../../datasource';
import { escapeLabelValueInSelector } from '../../languageUtils';
import logqlGrammar from '../../syntax';
import { LokiQuery } from '../../types';
import { lokiQueryModeller } from '../LokiQueryModeller';
import { isConflictingFilter } from '../operationUtils';
import { buildVisualQueryFromString } from '../parsing';
import { LokiOperationId, LokiVisualQuery } from '../types';

import { EXPLAIN_LABEL_FILTER_CONTENT } from './LokiQueryBuilderExplained';
import { NestedQueryList } from './NestedQueryList';

export const TIME_SPAN_TO_TRIGGER_SAMPLES = 5 * 60 * 1000;
export interface Props {
  query: LokiVisualQuery;
  datasource: LokiDatasource;
  showExplain: boolean;
  timeRange?: TimeRange;
  onChange: (update: LokiVisualQuery) => void;
  onRunQuery: () => void;
}
export const LokiQueryBuilder = memo<Props>(({ datasource, query, onChange, onRunQuery, showExplain, timeRange }) => {
  const [sampleData, setSampleData] = useState<PanelData>();
  const [highlightedOp, setHighlightedOp] = useState<QueryBuilderOperation | undefined>(undefined);
  const prevQuery = usePrevious(query);
  const prevTimeRange = usePrevious(timeRange);

const onChangeLabels = (labels: QueryBuilderLabelFilter[]) => {
    onChange({ ...query, labels });
  };

const withTemplateVariableOptions = async (optionsPromise: Promise<string[]>): Promise<SelectableValue[]> => {
    const options = await optionsPromise;
    return [...datasource.getVariables(), ...options].map((value) => ({ label: value, value }));
  };

const onGetLabelNames = async (forLabel: Partial<QueryBuilderLabelFilter>): Promise<string[]> => {
    const labelsToConsider = query.labels.filter((x) => x !== forLabel);

const hasEqualityOperation = labelsToConsider.find(
      (filter) => filter.op === '=' || (filter.op === '=~' && new RegExp(filter.value).test('') === false)
    );
    if (labelsToConsider.length === 0 || !hasEqualityOperation) {
      return await datasource.languageProvider.fetchLabels({ timeRange });
    }

const streamSelector = lokiQueryModeller.renderLabels(labelsToConsider);
    const possibleLabelNames = await datasource.languageProvider.fetchLabels({
      streamSelector,
      timeRange,
    });
    const labelsNamesToConsider = labelsToConsider.map((l) => l.label);

// Filter out label names that are already selected
    return possibleLabelNames.filter((label) => !labelsNamesToConsider.includes(label)).sort();
  };

const onGetLabelValues = async (forLabel: Partial<QueryBuilderLabelFilter>) => {
    if (!forLabel.label) {
      return [];
    }

let values;
    const labelsToConsider = query.labels.filter((x) => x !== forLabel);
    // If we have no equality/regex operation with .*, we can't fetch series as it will throw an error, so we fetch label values
    const hasEqualityOperation = labelsToConsider.find(
      (filter) => filter.op === '=' || (filter.op === '=~' && new RegExp(filter.value).test('') === false)
    );
    if (labelsToConsider.length === 0 || !hasEqualityOperation) {
      values = await datasource.languageProvider.fetchLabelValues(forLabel.label, { timeRange });
    } else {
      const streamSelector = lokiQueryModeller.renderLabels(labelsToConsider);
      values = await datasource.languageProvider.fetchLabelValues(forLabel.label, {
        streamSelector,
        timeRange,
      });
    }

return values ? values.map((v) => escapeLabelValueInSelector(v, forLabel.op)) : []; // Escape values in return
  };

const labelFilterRequired: boolean = useMemo(() => {
    const { labels, operations: op } = query;
    if (!labels.length && op.length) {
      // Filter is required when operations are present (empty line contains operation is exception)
      if (op.length === 1 && op[0].id === LokiOperationId.LineContains && op[0].params[0] === '') {
        return false;
      }
      return true;
    }
    return false;
  }, [query]);

useEffect(() => {
    const onGetSampleData = async () => {
      const lokiQuery = { expr: lokiQueryModeller.renderQuery(query), refId: 'data-samples' };
      const range = timeRange ?? getDefaultTimeRange();
      const series = await datasource.getDataSamples(lokiQuery, range);
      const sampleData = { series, state: LoadingState.Done, timeRange: range };
      setSampleData(sampleData);
    };

const updateBasedOnChangedTimeRange =
      prevTimeRange &&
      timeRange &&
      (Math.abs(timeRange.to.valueOf() - prevTimeRange.to.valueOf()) > TIME_SPAN_TO_TRIGGER_SAMPLES ||
        Math.abs(timeRange.from.valueOf() - prevTimeRange.from.valueOf()) > TIME_SPAN_TO_TRIGGER_SAMPLES);
    const updateBasedOnChangedQuery = !isEqual(prevQuery, query);
    if (updateBasedOnChangedTimeRange || updateBasedOnChangedQuery) {
      onGetSampleData().catch(console.error);
    }
  }, [datasource, query, timeRange, prevQuery, prevTimeRange]);

LokiQueryBuilder.displayName = 'LokiQueryBuilder';

.	Edit
..	Edit
LabelBrowserModal.test.tsx	Edit
LabelBrowserModal.tsx	Edit
LabelParamEditor.test.tsx	Edit
LabelParamEditor.tsx	Edit
LokiQueryBuilder.test.tsx	Edit
LokiQueryBuilder.tsx	Edit
LokiQueryBuilderContainer.test.tsx	Edit
LokiQueryBuilderContainer.tsx	Edit
LokiQueryBuilderExplained.tsx	Edit
LokiQueryBuilderOptions.test.tsx	Edit
LokiQueryBuilderOptions.tsx	Edit
LokiQueryCodeEditor.test.tsx	Edit
LokiQueryCodeEditor.tsx	Edit
NestedQuery.test.tsx	Edit
NestedQuery.tsx	Edit
NestedQueryList.test.tsx	Edit
NestedQueryList.tsx	Edit
QueryPattern.tsx	Edit
QueryPatternsModal.test.tsx	Edit
QueryPatternsModal.tsx	Edit
QueryPreview.tsx	Edit
UnwrapParamEditor.test.tsx	Edit
UnwrapParamEditor.tsx	Edit