import type { CSSInterpolation, CSSObject } from '@antd-tiny-vue/cssinjs'
import type { AliasToken } from '../theme/internal'
import type { TokenWithCommonCls } from '../theme/util/genComponentStyleHook'
import { roundedArrow } from './roundedArrow'

export const MAX_VERTICAL_CONTENT_RADIUS = 8

export function getArrowOffset(options: { contentRadius: number; limitVerticalRadius?: boolean }) {
  const maxVerticalContentRadius = MAX_VERTICAL_CONTENT_RADIUS
  const { contentRadius, limitVerticalRadius } = options
  const dropdownArrowOffset = contentRadius > 12 ? contentRadius + 2 : 12
  const dropdownArrowOffsetVertical = limitVerticalRadius ? maxVerticalContentRadius : dropdownArrowOffset
  return { dropdownArrowOffset, dropdownArrowOffsetVertical }
}

function isInject(valid: boolean, code: CSSObject): CSSObject {
  if (!valid) return {}
  return code
}

export default function getArrowStyle<Token extends TokenWithCommonCls<AliasToken>>(
  token: Token,
  options: {
    colorBg: string
    showArrowCls?: string
    contentRadius?: number
    limitVerticalRadius?: boolean
    arrowDistance?: number
    arrowPlacement?: {
      left?: boolean
      right?: boolean
      top?: boolean
      bottom?: boolean
    }
  }
): CSSInterpolation {
  const { componentCls, sizePopupArrow, borderRadiusXS, borderRadiusOuter, boxShadowPopoverArrow } = token

  const {
    colorBg,
    contentRadius = token.borderRadiusLG,
    limitVerticalRadius,
    arrowDistance = 0,
    arrowPlacement = {
      left: true,
      right: true,
      top: true,
      bottom: true
    }
  } = options

  const { dropdownArrowOffsetVertical, dropdownArrowOffset } = getArrowOffset({
    contentRadius,
    limitVerticalRadius
  })

  return {
    [componentCls]: {
      // ============================ Basic ============================
      [`${componentCls}-arrow`]: [
        {
          position: 'absolute',
          zIndex: 1, // lift it up so the menu wouldn't cask shadow on it
          display: 'block',

          ...roundedArrow(sizePopupArrow, borderRadiusXS, borderRadiusOuter, colorBg, boxShadowPopoverArrow),

          '&:before': {
            background: colorBg
          }
        }
      ],

      // ========================== Placement ==========================
      // Here handle the arrow position and rotate stuff
      // >>>>> Top
      ...isInject(!!arrowPlacement.top, {
        [[`&-placement-top ${componentCls}-arrow`, `&-placement-topLeft ${componentCls}-arrow`, `&-placement-topRight ${componentCls}-arrow`].join(',')]: {
          bottom: arrowDistance,
          transform: 'translateY(100%) rotate(180deg)'
        },

        [`&-placement-top ${componentCls}-arrow`]: {
          left: {
            _skip_check_: true,
            value: '50%'
          },
          transform: 'translateX(-50%) translateY(100%) rotate(180deg)'
        },

        [`&-placement-topLeft ${componentCls}-arrow`]: {
          left: {
            _skip_check_: true,
            value: dropdownArrowOffset
          }
        },

        [`&-placement-topRight ${componentCls}-arrow`]: {
          right: {
            _skip_check_: true,
            value: dropdownArrowOffset
          }
        }
      }),

      // >>>>> Bottom
      ...isInject(!!arrowPlacement.bottom, {
        [[`&-placement-bottom ${componentCls}-arrow`, `&-placement-bottomLeft ${componentCls}-arrow`, `&-placement-bottomRight ${componentCls}-arrow`].join(',')]: {
          top: arrowDistance,
          transform: `translateY(-100%)`
        },

        [`&-placement-bottom ${componentCls}-arrow`]: {
          left: {
            _skip_check_: true,
            value: '50%'
          },
          transform: `translateX(-50%) translateY(-100%)`
        },

        [`&-placement-bottomLeft ${componentCls}-arrow`]: {
          left: {
            _skip_check_: true,
            value: dropdownArrowOffset
          }
        },

        [`&-placement-bottomRight ${componentCls}-arrow`]: {
          right: {
            _skip_check_: true,
            value: dropdownArrowOffset
          }
        }
      }),

      // >>>>> Left
      ...isInject(!!arrowPlacement.left, {
        [[`&-placement-left ${componentCls}-arrow`, `&-placement-leftTop ${componentCls}-arrow`, `&-placement-leftBottom ${componentCls}-arrow`].join(',')]: {
          right: {
            _skip_check_: true,
            value: arrowDistance
          },
          transform: 'translateX(100%) rotate(90deg)'
        },

        [`&-placement-left ${componentCls}-arrow`]: {
          top: {
            _skip_check_: true,
            value: '50%'
          },
          transform: 'translateY(-50%) translateX(100%) rotate(90deg)'
        },

        [`&-placement-leftTop ${componentCls}-arrow`]: {
          top: dropdownArrowOffsetVertical
        },

        [`&-placement-leftBottom ${componentCls}-arrow`]: {
          bottom: dropdownArrowOffsetVertical
        }
      }),

      // >>>>> Right
      ...isInject(!!arrowPlacement.right, {
        [[`&-placement-right ${componentCls}-arrow`, `&-placement-rightTop ${componentCls}-arrow`, `&-placement-rightBottom ${componentCls}-arrow`].join(',')]: {
          left: {
            _skip_check_: true,
            value: arrowDistance
          },
          transform: 'translateX(-100%) rotate(-90deg)'
        },

        [`&-placement-right ${componentCls}-arrow`]: {
          top: {
            _skip_check_: true,
            value: '50%'
          },
          transform: 'translateY(-50%) translateX(-100%) rotate(-90deg)'
        },

        [`&-placement-rightTop ${componentCls}-arrow`]: {
          top: dropdownArrowOffsetVertical
        },

        [`&-placement-rightBottom ${componentCls}-arrow`]: {
          bottom: dropdownArrowOffsetVertical
        }
      })
    }
  }
}