components/ui/slider.tsx

'use client'

import * as React from 'react'
import * as SliderPrimitive from '@radix-ui/react-slider'

import { ny } from '@/lib/utils'

interface SliderProps extends React.ComponentPropsWithoutRef<typeof SliderPrimitive.Root> {
   showSteps?: 'none' | 'half' | 'full'
   formatLabel?: (value: number) => string
   formatLabelSide?: string
}

const Slider = React.forwardRef<
   React.ElementRef<typeof SliderPrimitive.Root>,
   SliderProps
>(({ className, showSteps = 'none', formatLabel, formatLabelSide = 'top', ...props }, ref) => {
   const { min = 0, max = 100, step = 1, orientation = 'horizontal', value, defaultValue, onValueChange } = props
   const [hoveredThumbIndex, setHoveredThumbIndex] = React.useState<boolean>(false)
   const numberOfSteps = Math.floor((max - min) / step)
   const stepLines = Array.from({ length: numberOfSteps }, (_, index) => index * step + min)

   const initialValue = Array.isArray(value) ? value : (Array.isArray(defaultValue) ? defaultValue : [min, max])
   const [localValues, setLocalValues] = React.useState<number[]>(initialValue)

   React.useEffect(() => {
      if (!isEqual(value, localValues))
         setLocalValues(Array.isArray(value) ? value : (Array.isArray(defaultValue) ? defaultValue : [min, max]))
   }, [min, max, value])

   const handleValueChange = (newValues: number[]) => {
      setLocalValues(newValues)
      if (onValueChange)
         onValueChange(newValues)
   }

   function isEqual(array1: number[] | undefined, array2: number[] | undefined) {
      array1 = array1 ?? []
      array2 = array2 ?? []

      if (array1.length !== array2.length)
         return false

      for (let i = 0; i < array1.length; i++) {
         if (array1[i] !== array2[i])
            return false
      }

      return true
   }

   return (
      <SliderPrimitive.Root
         ref={ref}
         className={ny(
            'relative flex cursor-pointer touch-none select-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50',
            orientation === 'horizontal' ? 'w-full items-center' : 'h-full justify-center',
            className,
         )}
         min={min}
         max={max}
         step={step}
         value={localValues}
         onValueChange={value => handleValueChange(value)}
         {...props}
         onFocus={() => setHoveredThumbIndex(true)}
         onBlur={() => setHoveredThumbIndex(false)}
      >
         <SliderPrimitive.Track className={ny(
            'bg-primary/20 relative grow overflow-hidden rounded-full',
            orientation === 'horizontal' ? 'h-1.5 w-full' : 'h-full w-1.5',
         )}
         >
            <SliderPrimitive.Range className={ny(
               'bg-primary absolute',
               orientation === 'horizontal' ? 'h-full' : 'w-full',
            )}
            />
            {showSteps !== undefined && showSteps !== 'none' && stepLines.map((value, index) => {
               if (value === min || value === max)
                  return null

               const positionPercentage = ((value - min) / (max - min)) * 100
               const adjustedPosition = 50 + (positionPercentage - 50) * 0.96
               return (
                  <div
                     key={index}
                     className={ny(
                        { 'w-0.5 h-2': orientation !== 'vertical', 'w-2 h-0.5': orientation === 'vertical' },
                        'bg-muted-foreground absolute',
                        {
                           'left-1': orientation === 'vertical' && showSteps === 'half',
                           'top-1': orientation !== 'vertical' && showSteps === 'half',
                           'left-0': orientation === 'vertical' && showSteps === 'full',
                           'top-0': orientation !== 'vertical' && showSteps === 'full',
                           '-translate-x-1/2': orientation !== 'vertical',
                           '-translate-y-1/2': orientation === 'vertical',
                        },
                     )}
                     style={{
                        [orientation === 'vertical' ? 'bottom' : 'left']: `${adjustedPosition}%`,
                     }}
                  />
               )
            })}

         </SliderPrimitive.Track>
         {localValues.map((numberStep, index) => (
            <SliderPrimitive.Thumb
               key={index}
               className={ny(
                  'border-primary/50 bg-background focus-visible:ring-ring block size-4 rounded-full border shadow transition-colors focus-visible:outline-none focus-visible:ring-1',
               )}
            >
               {hoveredThumbIndex && formatLabel && (
                  <div
                     className={ny(
                        { 'bottom-8 left-1/2 -translate-x-1/2': formatLabelSide === 'top' },
                        { 'top-8 left-1/2 -translate-x-1/2': formatLabelSide === 'bottom' },
                        { 'right-8 -translate-y-1/4': formatLabelSide === 'left' },
                        { 'left-8 -translate-y-1/4': formatLabelSide === 'right' },
                        'bg-popover text-popover-foreground absolute z-30 w-max items-center justify-items-center rounded-md border px-2 py-1 text-center shadow-sm',
                     )}
                  >
                     {formatLabel(numberStep)}
                  </div>
               )}
            </SliderPrimitive.Thumb>
         ))}
      </SliderPrimitive.Root>
   )
})

Slider.displayName = SliderPrimitive.Root.displayName

export { Slider }