import { DECADE_DISTANCE_COUNT, DECADE_UNIT_DIFF } from '.'
import type { GenerateConfig } from '../../generate'
import useMergeProps from '../../hooks/useMergeProps'
import PanelBody from '../PanelBody'

export const DECADE_COL_COUNT = 3
const DECADE_ROW_COUNT = 4

export interface YearBodyProps<DateType> {
  prefixCls: string
  generateConfig: GenerateConfig<DateType>
  viewDate: DateType
  disabledDate?: (date: DateType) => boolean
  onSelect: (value: DateType) => void
}

function DecadeBody<DateType>(_props: YearBodyProps<DateType>) {
  const props = useMergeProps(_props)
  const DECADE_UNIT_DIFF_DES = DECADE_UNIT_DIFF - 1
  const { prefixCls, viewDate, generateConfig } = props

  const cellPrefixCls = `${prefixCls}-cell`

  const yearNumber = generateConfig.getYear(viewDate)
  const decadeYearNumber = Math.floor(yearNumber / DECADE_UNIT_DIFF) * DECADE_UNIT_DIFF

  const startDecadeYear = Math.floor(yearNumber / DECADE_DISTANCE_COUNT) * DECADE_DISTANCE_COUNT
  const endDecadeYear = startDecadeYear + DECADE_DISTANCE_COUNT - 1

  const baseDecadeYear = generateConfig.setYear(
    viewDate,
    startDecadeYear -
      Math.ceil(
        (DECADE_COL_COUNT * DECADE_ROW_COUNT * DECADE_UNIT_DIFF - DECADE_DISTANCE_COUNT) / 2,
      ),
  )

  const getCellClassName = (date: DateType) => {
    const startDecadeNumber = generateConfig.getYear(date)
    const endDecadeNumber = startDecadeNumber + DECADE_UNIT_DIFF_DES

    return {
      [`${cellPrefixCls}-in-view`]:
        startDecadeYear <= startDecadeNumber && endDecadeNumber <= endDecadeYear,
      [`${cellPrefixCls}-selected`]: startDecadeNumber === decadeYearNumber,
    }
  }

  return (
    <PanelBody
      {...props}
      rowNum={DECADE_ROW_COUNT}
      colNum={DECADE_COL_COUNT}
      baseDate={baseDecadeYear}
      getCellText={(date) => {
        const startDecadeNumber = generateConfig.getYear(date)
        return `${startDecadeNumber}-${startDecadeNumber + DECADE_UNIT_DIFF_DES}`
      }}
      getCellClassName={getCellClassName}
      getCellDate={(date, offset) => generateConfig.addYear(date, offset * DECADE_UNIT_DIFF)}
    />
  )
}

DecadeBody.displayName = 'DecadeBody'
DecadeBody.inheritAttrs = false

export default DecadeBody
