/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import {
  ChartProps,
  DataRecord,
  ensureIsArray,
  extractTimegrain,
  getColumnLabel,
  getMetricLabel,
  getTimeFormatter,
  getTimeFormatterForGranularity,
  QueryFormData,
  SMART_DATE_ID,
  TimeFormats,
} from '@superset-ui/core';
import { GenericDataType } from '@apache-superset/core/common';
import {
  ColorSchemeEnum,
  ConditionalFormattingConfig,
  getColorFormatters,
} from '@superset-ui/chart-controls';
import { DateFormatter, PivotTableQueryFormData, QueryData } from '../types';
import buildGroupbyCombinations, {
  additiveReducerFor,
  allMetricsAdditive,
  RollupReducer,
  splitGroupingSetsResult,
  synthesizeAdditiveLevels,
} from './utilities';

const { DATABASE_DATETIME } = TimeFormats;

function isNumeric(key: string, data: DataRecord[] = []) {
  return data.every(
    record =>
      record[key] === null ||
      record[key] === undefined ||
      typeof record[key] === 'number',
  );
}

export default function transformProps(chartProps: ChartProps<QueryFormData>) {
  /**
   * This function is called after a successful response has been
   * received from the chart data endpoint, and is used to transform
   * the incoming data prior to being sent to the Visualization.
   *
   * The transformProps function is also quite useful to return
   * additional/modified props to your data viz component. The formData
   * can also be accessed from your PivotTableChart.tsx file, but
   * doing supplying custom props here is often handy for integrating third
   * party libraries that rely on specific props.
   *
   * A description of properties in `chartProps`:
   * - `height`, `width`: the height/width of the DOM element in which
   *   the chart is located
   * - `formData`: the chart data request payload that was sent to the
   *   backend.
   * - `queriesData`: the chart data response payload that was received
   *   from the backend. Some notable properties of `queriesData`:
   *   - `data`: an array with data, each row with an object mapping
   *     the column/alias to its value. Example:
   *     `[{ col1: 'abc', metric1: 10 }, { col1: 'xyz', metric1: 20 }]`
   *   - `rowcount`: the number of rows in `data`
   *   - `query`: the query that was issued.
   *
   * Please note: the transformProps function gets cached when the
   * application loads. When making changes to the `transformProps`
   * function during development with hot reloading, changes won't
   * be seen until restarting the development server.
   */
  const {
    width,
    height,
    queriesData,
    formData,
    rawFormData,
    hooks: { setDataMask = () => {}, onContextMenu },
    filterState,
    datasource: {
      verboseMap = {},
      columnFormats = {},
      currencyFormats = {},
      currencyCodeColumn,
    },
    emitCrossFilters,
    theme,
  } = chartProps;
  const groupbyCombinations = buildGroupbyCombinations(
    formData as PivotTableQueryFormData,
  );
  const metricsArr = ensureIsArray(formData.metrics);
  let data: QueryData[];
  if (allMetricsAdditive(metricsArr)) {
    // Additive fast-path: a single full-detail query was issued; synthesize
    // each rollup level by reducing the leaf rows on the client (see SIP.md).
    const leafRows = queriesData[0].data;
    const metricReducers: Record<string, RollupReducer> = {};
    metricsArr.forEach(metric => {
      metricReducers[getMetricLabel(metric)] = additiveReducerFor(metric);
    });
    const labelLevels = groupbyCombinations.map(combination => ({
      rows: combination.rows.map(getColumnLabel),
      columns: combination.columns.map(getColumnLabel),
    }));
    const synthesized = synthesizeAdditiveLevels(
      leafRows,
      labelLevels,
      metricReducers,
    );
    data = groupbyCombinations.map((combination, i) => ({
      data: synthesized[i] as DataRecord[],
      groupby: combination,
    }));
  } else {
    // Non-additive: a single GROUPING SETS query returned all rollup levels
    // tagged with GROUPING() markers; split the combined result back into one
    // frame per level (same order as buildQuery's grouping_sets). See SIP.md.
    const levelLabels = groupbyCombinations.map(combination =>
      [...combination.rows, ...combination.columns].map(getColumnLabel),
    );
    const allGroupbyLabels = Array.from(new Set(levelLabels.flat()));
    const splitRows = splitGroupingSetsResult(
      queriesData[0].data,
      levelLabels,
      allGroupbyLabels,
    );
    data = groupbyCombinations.map((combination, i) => ({
      data: splitRows[i] as DataRecord[],
      groupby: combination,
    }));
  }
  // The full-granularity query has the most colnames -- use it for column/type
  // metadata and formatters.
  const mainQuery = queriesData.reduce((main, query) =>
    query.colnames.length > main.colnames.length ? query : main,
  );
  const { colnames, coltypes, detected_currency: detectedCurrency } = mainQuery;
  const {
    groupbyRows,
    groupbyColumns,
    metrics,
    tableRenderer,
    colOrder,
    rowOrder,
    transposePivot,
    combineMetric,
    rowSubtotalPosition,
    colSubtotalPosition,
    colTotals,
    colSubTotals,
    rowTotals,
    rowSubTotals,
    valueFormat,
    dateFormat,
    metricsLayout,
    showValuesAs,
    conditionalFormatting,
    timeGrainSqla,
    currencyFormat,
    allowRenderHtml,
  } = formData;
  const { selectedFilters } = filterState;
  const granularity = extractTimegrain(rawFormData);

  const dateFormatters = colnames
    .filter(
      (colname: string, index: number) =>
        coltypes[index] === GenericDataType.Temporal,
    )
    .reduce(
      (
        acc: Record<string, DateFormatter | undefined>,
        temporalColname: string,
      ) => {
        let formatter: DateFormatter | undefined;
        if (dateFormat === SMART_DATE_ID) {
          if (granularity) {
            // time column use formats based on granularity
            formatter = getTimeFormatterForGranularity(granularity);
          } else if (isNumeric(temporalColname, mainQuery.data)) {
            formatter = getTimeFormatter(DATABASE_DATETIME);
          } else {
            // if no column-specific format, print cell as is
            formatter = String;
          }
        } else if (dateFormat) {
          formatter = getTimeFormatter(dateFormat);
        }
        if (formatter) {
          acc[temporalColname] = formatter;
        }
        return acc;
      },
      {},
    );
  // The "Green"/"Red" trend-color tokens are resolved by the Table chart's
  // own comparison-aware formatter, which this renderer does not implement.
  // Filter them out so a stale config (e.g. carried over from switching viz
  // types) doesn't leak the raw token name through as a literal CSS color.
  const pivotConditionalFormatting = conditionalFormatting?.filter(
    (config: ConditionalFormattingConfig) =>
      config.colorScheme !== ColorSchemeEnum.Green &&
      config.colorScheme !== ColorSchemeEnum.Red,
  );
  const metricColorFormatters = getColorFormatters(
    pivotConditionalFormatting,
    mainQuery.data,
    theme,
  );

  // AUTO symbol passed through - PivotTableChart handles per-cell currency detection

  return {
    width,
    height,
    data,
    groupbyRows,
    groupbyColumns,
    metrics,
    tableRenderer,
    colOrder,
    rowOrder,
    transposePivot,
    combineMetric,
    rowSubtotalPosition,
    colSubtotalPosition,
    colTotals,
    colSubTotals,
    rowTotals,
    rowSubTotals,
    valueFormat,
    currencyFormat,
    currencyCodeColumn,
    detectedCurrency,
    emitCrossFilters,
    setDataMask,
    selectedFilters,
    verboseMap,
    columnFormats,
    currencyFormats,
    metricsLayout,
    showValuesAs,
    metricColorFormatters,
    dateFormatters,
    onContextMenu,
    timeGrainSqla,
    allowRenderHtml,
  };
}