jumble/src/components/ui/carousel.tsx

import * as React from 'react'
import useEmblaCarousel, { type UseEmblaCarouselType } from 'embla-carousel-react'
import { ArrowLeft, ArrowRight } from 'lucide-react'

import { cn } from '@/lib/utils'
import { Button } from '@/components/ui/button'

type CarouselApi = UseEmblaCarouselType[1]
type UseCarouselParameters = Parameters<typeof useEmblaCarousel>
type CarouselOptions = UseCarouselParameters[0]
type CarouselPlugin = UseCarouselParameters[1]

type CarouselProps = {
  opts?: CarouselOptions
  plugins?: CarouselPlugin
  orientation?: 'horizontal' | 'vertical'
  setApi?: (api: CarouselApi) => void
}

type CarouselContextProps = {
  carouselRef: ReturnType<typeof useEmblaCarousel>[0]
  api: ReturnType<typeof useEmblaCarousel>[1]
  scrollPrev: () => void
  scrollNext: () => void
  canScrollPrev: boolean
  canScrollNext: boolean
} & CarouselProps

const CarouselContext = React.createContext<CarouselContextProps | null>(null)

function useCarousel() {
  const context = React.useContext(CarouselContext)

  if (!context) {
    throw new Error('useCarousel must be used within a <Carousel />')
  }

  return context
}

const Carousel = React.forwardRef<
  HTMLDivElement,
  React.HTMLAttributes<HTMLDivElement> & CarouselProps
>(({ orientation = 'horizontal', opts, setApi, plugins, className, children, ...props }, ref) => {
  const [carouselRef, api] = useEmblaCarousel(
    {
      ...opts,
      axis: orientation === 'horizontal' ? 'x' : 'y'
    },
    plugins
  )
  const [canScrollPrev, setCanScrollPrev] = React.useState(false)
  const [canScrollNext, setCanScrollNext] = React.useState(false)

  const onSelect = React.useCallback((api: CarouselApi) => {
    if (!api) {
      return
    }

    setCanScrollPrev(api.canScrollPrev())
    setCanScrollNext(api.canScrollNext())
  }, [])

  const scrollPrev = React.useCallback(() => {
    api?.scrollPrev()
  }, [api])

  const scrollNext = React.useCallback(() => {
    api?.scrollNext()
  }, [api])

  const handleKeyDown = React.useCallback(
    (event: React.KeyboardEvent<HTMLDivElement>) => {
      if (event.key === 'ArrowLeft') {
        event.preventDefault()
        scrollPrev()
      } else if (event.key === 'ArrowRight') {
        event.preventDefault()
        scrollNext()
      }
    },
    [scrollPrev, scrollNext]
  )

  React.useEffect(() => {
    if (!api || !setApi) {
      return
    }

    setApi(api)
  }, [api, setApi])

  React.useEffect(() => {
    if (!api) {
      return
    }

    onSelect(api)
    api.on('reInit', onSelect)
    api.on('select', onSelect)

    return () => {
      api?.off('select', onSelect)
    }
  }, [api, onSelect])

  return (
    <CarouselContext.Provider
      value={{
        carouselRef,
        api: api,
        opts,
        orientation: orientation || (opts?.axis === 'y' ? 'vertical' : 'horizontal'),
        scrollPrev,
        scrollNext,
        canScrollPrev,
        canScrollNext
      }}
    >
      <div
        ref={ref}
        onKeyDownCapture={handleKeyDown}
        className={cn('relative', className)}
        role="region"
        aria-roledescription="carousel"
        {...props}
      >
        {children}
      </div>
    </CarouselContext.Provider>
  )
})
Carousel.displayName = 'Carousel'

const CarouselContent = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
  ({ className, ...props }, ref) => {
    const { carouselRef, orientation } = useCarousel()

    return (
      <div ref={carouselRef} className="overflow-hidden">
        <div
          ref={ref}
          className={cn(
            'flex',
            orientation === 'horizontal' ? '-ml-4' : '-mt-4 flex-col',
            className
          )}
          {...props}
        />
      </div>
    )
  }
)
CarouselContent.displayName = 'CarouselContent'

const CarouselItem = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
  ({ className, ...props }, ref) => {
    const { orientation } = useCarousel()

    return (
      <div
        ref={ref}
        role="group"
        aria-roledescription="slide"
        className={cn(
          'min-w-0 shrink-0 grow-0 basis-full',
          orientation === 'horizontal' ? 'pl-4' : 'pt-4',
          className
        )}
        {...props}
      />
    )
  }
)
CarouselItem.displayName = 'CarouselItem'

const CarouselPrevious = React.forwardRef<HTMLButtonElement, React.ComponentProps<typeof Button>>(
  ({ className, variant = 'outline', size = 'icon', ...props }, ref) => {
    const { orientation, scrollPrev, canScrollPrev } = useCarousel()

    return (
      <Button
        ref={ref}
        variant={variant}
        size={size}
        className={cn(
          'absolute  h-8 w-8 rounded-full',
          orientation === 'horizontal'
            ? '-left-12 top-1/2 -translate-y-1/2'
            : '-top-12 left-1/2 -translate-x-1/2 rotate-90',
          className
        )}
        disabled={!canScrollPrev}
        onClick={scrollPrev}
        {...props}
      >
        <ArrowLeft className="h-4 w-4" />
        <span className="sr-only">Previous slide</span>
      </Button>
    )
  }
)
CarouselPrevious.displayName = 'CarouselPrevious'

const CarouselNext = React.forwardRef<HTMLButtonElement, React.ComponentProps<typeof Button>>(
  ({ className, variant = 'outline', size = 'icon', ...props }, ref) => {
    const { orientation, scrollNext, canScrollNext } = useCarousel()

    return (
      <Button
        ref={ref}
        variant={variant}
        size={size}
        className={cn(
          'absolute h-8 w-8 rounded-full',
          orientation === 'horizontal'
            ? '-right-12 top-1/2 -translate-y-1/2'
            : '-bottom-12 left-1/2 -translate-x-1/2 rotate-90',
          className
        )}
        disabled={!canScrollNext}
        onClick={scrollNext}
        {...props}
      >
        <ArrowRight className="h-4 w-4" />
        <span className="sr-only">Next slide</span>
      </Button>
    )
  }
)
CarouselNext.displayName = 'CarouselNext'

export { type CarouselApi, Carousel, CarouselContent, CarouselItem, CarouselPrevious, CarouselNext }