import useMergeProps from '../../hooks/useMergeProps'
import type { PanelMode, PanelSharedProps } from '../../interface'
import { createKeydownHandler } from '../../utils/uiUtil'
import YearBody, { YEAR_COL_COUNT } from './YearBody'
import YearHeader from './YearHeader'

export type YearPanelProps<DateType> = {
  sourceMode: PanelMode
} & PanelSharedProps<DateType>

export const YEAR_DECADE_COUNT = 10

function YearPanel<DateType>(_props: YearPanelProps<DateType>) {
  const props = useMergeProps(_props)
  const {
    prefixCls,
    operationRef,
    onViewDateChange,
    generateConfig,
    value,
    viewDate,
    sourceMode,
    onSelect,
    onPanelChange,
  } = props

  const panelPrefixCls = `${prefixCls}-year-panel`

  // ======================= Keyboard =======================
  operationRef.value = {
    onKeydown: (event: KeyboardEvent) =>
      createKeydownHandler(event, {
        onLeftRight: (diff) => {
          onSelect(generateConfig.addYear(value || viewDate, diff), 'key')
        },
        onCtrlLeftRight: (diff) => {
          onSelect(generateConfig.addYear(value || viewDate, diff * YEAR_DECADE_COUNT), 'key')
        },
        onUpDown: (diff) => {
          onSelect(generateConfig.addYear(value || viewDate, diff * YEAR_COL_COUNT), 'key')
        },
        onEnter: () => {
          onPanelChange(sourceMode === 'date' ? 'date' : 'month', value || viewDate)
        },
      }),
  }

  // ==================== View Operation ====================
  const onDecadeChange = (diff: number) => {
    const newDate = generateConfig.addYear(viewDate, diff * 10)
    onViewDateChange(newDate)
    onPanelChange(null, newDate)
  }

  return (
    <div class={panelPrefixCls}>
      <YearHeader
        {...props}
        prefixCls={prefixCls}
        onPrevDecade={() => {
          onDecadeChange(-1)
        }}
        onNextDecade={() => {
          onDecadeChange(1)
        }}
        onDecadeClick={() => {
          onPanelChange('decade', viewDate)
        }}
      />
      <YearBody
        {...props}
        prefixCls={prefixCls}
        onSelect={(date) => {
          onPanelChange(sourceMode === 'date' ? 'date' : 'month', date)
          onSelect(date, 'mouse')
        }}
      />
    </div>
  )
}

YearPanel.displayName = 'YearPanel'
YearPanel.inheritAttrs = false

export default YearPanel
