import type { FullToken, GenerateStyle } from '../../theme/internal';
import { genComponentStyleHook, mergeToken } from '../../theme/internal';
import { resetComponent } from '../../style';

export interface ComponentToken {
  dotWidth: number;
  dotHeight: number;
  dotWidthActive: number;
}

interface CarouselToken extends FullToken<'Carousel'> {
  carouselArrowSize: number;
  carouselDotOffset: number;
  carouselDotInline: number;
}

const genCarouselStyle: GenerateStyle<CarouselToken> = (token) => {
  const { componentCls, antCls, carouselArrowSize, carouselDotOffset, marginXXS } = token;
  const arrowOffset = -carouselArrowSize * 1.25;

  const carouselDotMargin = marginXXS;

  return {
    [componentCls]: {
      ...resetComponent(token),

      '.slick-slider': {
        position: 'relative',
        display: 'block',
        boxSizing: 'border-box',
        touchAction: 'pan-y',
        WebkitTouchCallout: 'none',
        WebkitTapHighlightColor: 'transparent',

        '.slick-track, .slick-list': {
          transform: 'translate3d(0, 0, 0)',
          touchAction: 'pan-y',
        },
      },

      '.slick-list': {
        position: 'relative',
        display: 'block',
        margin: 0,
        padding: 0,
        overflow: 'hidden',

        '&:focus': {
          outline: 'none',
        },

        '&.dragging': {
          cursor: 'pointer',
        },

        '.slick-slide': {
          pointerEvents: 'none',

          // https://github.com/ant-design/ant-design/issues/23294
          [`input${antCls}-radio-input, input${antCls}-checkbox-input`]: {
            visibility: 'hidden',
          },

          '&.slick-active': {
            pointerEvents: 'auto',

            [`input${antCls}-radio-input, input${antCls}-checkbox-input`]: {
              visibility: 'visible',
            },
          },

          // fix Carousel content height not match parent node
          // when children is empty node
          // https://github.com/ant-design/ant-design/issues/25878
          '> div > div': {
            verticalAlign: 'bottom',
          },
        },
      },

      '.slick-track': {
        position: 'relative',
        top: 0,
        insetInlineStart: 0,
        display: 'block',

        '&::before, &::after': {
          display: 'table',
          content: '""',
        },

        '&::after': {
          clear: 'both',
        },
      },

      '.slick-slide': {
        display: 'none',
        float: 'left',
        height: '100%',
        minHeight: 1,

        img: {
          display: 'block',
        },

        '&.dragging img': {
          pointerEvents: 'none',
        },
      },

      '.slick-initialized .slick-slide': {
        display: 'block',
      },

      '.slick-vertical .slick-slide': {
        display: 'block',
        height: 'auto',
      },

      '.slick-arrow.slick-hidden': {
        display: 'none',
      },

      // Arrows
      '.slick-prev, .slick-next': {
        position: 'absolute',
        top: '50%',
        display: 'block',
        width: carouselArrowSize,
        height: carouselArrowSize,
        marginTop: -carouselArrowSize / 2,
        padding: 0,
        color: 'transparent',
        fontSize: 0,
        lineHeight: 0,
        background: 'transparent',
        border: 0,
        outline: 'none',
        cursor: 'pointer',

        '&:hover, &:focus': {
          color: 'transparent',
          background: 'transparent',
          outline: 'none',

          '&::before': {
            opacity: 1,
          },
        },

        '&.slick-disabled::before': {
          opacity: 0.25,
        },
      },

      '.slick-prev': {
        insetInlineStart: arrowOffset,

        '&::before': {
          content: '"←"',
        },
      },

      '.slick-next': {
        insetInlineEnd: arrowOffset,

        '&::before': {
          content: '"→"',
        },
      },

      // Dots
      '.slick-dots': {
        position: 'absolute',
        insetInlineEnd: 0,
        bottom: 0,
        insetInlineStart: 0,
        zIndex: 15,
        display: 'flex !important',
        justifyContent: 'center',
        paddingInlineStart: 0,
        listStyle: 'none',

        '&-bottom': {
          bottom: carouselDotOffset,
        },

        '&-top': {
          top: carouselDotOffset,
          bottom: 'auto',
        },

        li: {
          position: 'relative',
          display: 'inline-block',
          flex: '0 1 auto',
          boxSizing: 'content-box',
          width: token.dotWidth,
          height: token.dotHeight,
          marginInline: carouselDotMargin,
          padding: 0,
          textAlign: 'center',
          textIndent: -999,
          verticalAlign: 'top',
          transition: `all ${token.motionDurationSlow}`,

          button: {
            position: 'relative',
            display: 'block',
            width: '100%',
            height: token.dotHeight,
            padding: 0,
            color: 'transparent',
            fontSize: 0,
            background: token.colorBgContainer,
            border: 0,
            borderRadius: 1,
            outline: 'none',
            cursor: 'pointer',
            opacity: 0.3,
            transition: `all ${token.motionDurationSlow}`,

            '&: hover, &:focus': {
              opacity: 0.75,
            },

            '&::after': {
              position: 'absolute',
              inset: -carouselDotMargin,
              content: '""',
            },
          },

          '&.slick-active': {
            width: token.dotWidthActive,

            '& button': {
              background: token.colorBgContainer,
              opacity: 1,
            },

            '&: hover, &:focus': {
              opacity: 1,
            },
          },
        },
      },
    },
  };
};

const genCarouselVerticalStyle: GenerateStyle<CarouselToken> = (token) => {
  const { componentCls, carouselDotOffset, marginXXS } = token;

  const reverseSizeOfDot = {
    width: token.dotHeight,
    height: token.dotWidth,
  };

  return {
    [`${componentCls}-vertical`]: {
      '.slick-dots': {
        top: '50%',
        bottom: 'auto',
        flexDirection: 'column',
        width: token.dotHeight,
        height: 'auto',
        margin: 0,
        transform: 'translateY(-50%)',

        '&-left': {
          insetInlineEnd: 'auto',
          insetInlineStart: carouselDotOffset,
        },

        '&-right': {
          insetInlineEnd: carouselDotOffset,
          insetInlineStart: 'auto',
        },

        li: {
          // reverse width and height in vertical situation
          ...reverseSizeOfDot,
          margin: `${marginXXS}px 0`,
          verticalAlign: 'baseline',

          button: reverseSizeOfDot,

          '&.slick-active': {
            ...reverseSizeOfDot,

            button: reverseSizeOfDot,
          },
        },
      },
    },
  };
};

const genCarouselRtlStyle: GenerateStyle<CarouselToken> = (token) => {
  const { componentCls } = token;

  return [
    {
      [`${componentCls}-rtl`]: {
        direction: 'rtl',

        // Dots
        '.slick-dots': {
          [`${componentCls}-rtl&`]: {
            flexDirection: 'row-reverse',
          },
        },
      },
    },
    {
      [`${componentCls}-vertical`]: {
        '.slick-dots': {
          [`${componentCls}-rtl&`]: {
            flexDirection: 'column',
          },
        },
      },
    },
  ];
};

// ============================== Export ==============================
export default genComponentStyleHook(
  'Carousel',
  (token) => {
    const { controlHeightLG, controlHeightSM } = token;
    const carouselToken = mergeToken<CarouselToken>(token, {
      carouselArrowSize: controlHeightLG / 2,
      carouselDotOffset: controlHeightSM / 2,
    });

    return [
      genCarouselStyle(carouselToken),
      genCarouselVerticalStyle(carouselToken),
      genCarouselRtlStyle(carouselToken),
    ];
  },
  {
    dotWidth: 16,
    dotHeight: 3,
    dotWidthActive: 24,
  },
);