# All files / utils/legend staticLegend.ts

51.38% Statements 37/72
48.57% Branches 34/70
53.33% Functions 8/15
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     import {
      BandLayerSpec,
      Formatter,
      LayerSpec,
      LegendData,
      LineData,
      LineLayerSpec,
      LinePosition,
    } from '../../types'
    import {
      FILL,
      LINE_COUNT,
      STACKED_LINE_CUMULATIVE,
    } from '../../constants/columnKeys'

    import {getTooltipBandGroupColumns} from './band'
    import {formatLegendValues} from './format'
    import {sortBandLines, sortIndicesByValueColumn} from './sort'

    export const getLegendData = (
      layerType: string,
      spec: LayerSpec,
      valueColumnKey: string,
      getFormatter?: (columnKey: string) => Formatter
    ): LegendData => {
      switch (layerType) {
        case 'line':
          const position = Array.isArray(
            (spec as LineLayerSpec).stackedDomainValueColumn
          )
            ? 'stacked'
            : 'overlaid'
          return convertLineSpec(
            spec as LineLayerSpec,
            valueColumnKey,
            getFormatter,
            position
          )

        case 'band':
          return convertBandSpec(
            spec as BandLayerSpec,
            valueColumnKey,
            getFormatter
          )

        default:
          return []
      }
    }

    export const convertLineSpec = (
      spec: LineLayerSpec,
      valueColumnKey: string,
      getColumnFormatter: (colKey: string) => Formatter,
      position: LinePosition
    ): LegendData => {
      const columnKeys = spec?.columnGroupMaps?.fill?.columnKeys
      Iif (!Array.isArray(columnKeys)) {
        return null
      }
      const mappings = spec?.columnGroupMaps?.fill?.mappings
      const valueFormatter = getColumnFormatter(valueColumnKey)
      const latestValueIndices = spec?.columnGroupMaps?.latestIndices
      const lineValues = spec.table.getColumn(valueColumnKey)
      const fillIndices = spec.table.getColumn(FILL)
      const lineData: LineData = spec?.lineData
      const stackedDomainValues = spec.stackedDomainValueColumn ?? []

      const sortOrder = sortIndicesByValueColumn(
        position === 'stacked' ? stackedDomainValues : lineValues,
        Object.values(latestValueIndices)
      )

      const colors = sortOrder.map(index => lineData[`${fillIndices[index]}`].fill)

      const valueColumn = {
        key: valueColumnKey,
        name: `Latest ${valueColumnKey}`,
        type: spec.table.getColumnType(valueColumnKey),
        colors,
        values: formatLegendValues(lineValues, sortOrder, valueFormatter),
      }

      const additionalColumns = []
      if (position === 'stacked') {
        additionalColumns.push({
          key: `_${STACKED_LINE_CUMULATIVE}`,
          name: STACKED_LINE_CUMULATIVE,
          type: spec.table.getColumnType(valueColumnKey),
          colors,
          values: sortOrder.map(index =>
            valueFormatter(stackedDomainValues[index])
          ),
        })

        const lineCountByGroupId = {}
        sortOrder
          .map(index => fillIndices[index])
          .sort()
          .forEach((groupId, key) => {
            lineCountByGroupId[`${groupId}`] = key + 1
          })
        additionalColumns.push({
          key: `_${LINE_COUNT}`,
          name: LINE_COUNT,
          type: spec.table.getColumnType(valueColumnKey),
          colors,
          values: sortOrder.map(
            index => lineCountByGroupId[`${fillIndices[index]}`]
          ),
        })
      }

      const fillColumns = columnKeys.map(key => {
        const fillColumn: string[] = sortOrder.map(index => {
          const columns = mappings[`${fillIndices[index]}`]
          const fillFormatter = getColumnFormatter(key)
          return fillFormatter(columns[key])
        })

        return {
          key,
          name: key,
          type: spec.table.getColumnType(key),
          values: fillColumn,
          colors,
        }
      })

      return [valueColumn, ...additionalColumns, ...fillColumns]
    }

    export const convertBandSpec = (
      spec: BandLayerSpec,
      valueColumnKey: string,
      getColumnFormatter: (colKey: string) => Formatter
    ): LegendData => {
      const columnKeys = spec?.columnGroupMaps?.fill?.columnKeys
      Iif (!Array.isArray(columnKeys)) {
        return null
      }
      const valueFormatter = getColumnFormatter(valueColumnKey)
      const {latestIndices} = spec?.columnGroupMaps
      const lineData: LineData = spec?.lineData

      const bandValues = spec.table.getColumn(valueColumnKey)
      const {bandName, upperColumnName, lowerColumnName} = spec
      const {bandLineMap} = spec

      const sortedBandLineMap = sortBandLines(
        bandValues,
        bandLineMap,
        latestIndices
      )
      const {
        upperLines: sortedUpperLines,
        rowLines: sortedRowLines,
        lowerLines: sortedLowerLines,
      } = sortedBandLineMap

      const colors = sortedRowLines.map(line => lineData[line].fill)

      const rowValuesColumn = {
        key: valueColumnKey,
        name: `Latest ${valueColumnKey}:${bandName}`,
        type: spec.table.getColumnType(valueColumnKey),
        colors,
        values: formatLegendValues(
          bandValues,
          sortedRowLines.map(line => latestIndices[line]),
          valueFormatter
        ),
      }

      const tooltipAdditionalColumns = []

      Iif (upperColumnName) {
        tooltipAdditionalColumns.push({
          key: valueColumnKey,
          name: `${valueColumnKey}:${upperColumnName}`,
          type: spec.table.getColumnType(valueColumnKey),
          colors,
          values: formatLegendValues(
            bandValues,
            sortedUpperLines.map(line => latestIndices[line]),
            valueFormatter
          ),
        })
      }

      Iif (lowerColumnName) {
        tooltipAdditionalColumns.push({
          key: valueColumnKey,
          name: `${valueColumnKey}:${lowerColumnName}`,
          type: spec.table.getColumnType(valueColumnKey),
          colors,
          values: formatLegendValues(
            bandValues,
            sortedLowerLines.map(line => latestIndices[line]),
            valueFormatter
          ),
        })
      }

      const fillColumns = getTooltipBandGroupColumns(
        spec.table,
        sortedRowLines.map(line => latestIndices[line]),
        columnKeys,
        getColumnFormatter,
        colors
      )

      return [rowValuesColumn, ...tooltipAdditionalColumns, ...fillColumns]
    }