"use client"

/**
 * Slider — Radix-backed range input with token-aligned track + thumb
 * styling.
 *
 * Use for **continuous numeric ranges** with a clear visual track: brand
 * brightness, threshold sliders, audio scrubbing, density / scale
 * pickers. For discrete enumerable values (3 sizes, low / med / high),
 * prefer `ToggleGroup` or `RadioGroup` instead — sliders imply continuity.
 *
 * Pass `value` / `defaultValue` as `number[]` for either a single thumb
 * (`[value]`) or a range (`[min, max]`). Two thumbs share a track.
 *
 * Accessibility (per Radix):
 *  - Each thumb is a focusable `role="slider"` with proper ARIA value
 *    text. Pair with a visible label / `aria-label` when there is no
 *    surrounding form field.
 *  - Arrow keys nudge by `step`; Page Up / Down nudge by 10×; Home / End
 *    jump to bounds.
 */

import * as React from "react"
import { Slider as SliderPrimitive } from "radix-ui"

import { cn } from "../../lib/utils"

function Slider({
  className,
  defaultValue,
  value,
  min = 0,
  max = 100,
  "aria-label": ariaLabel,
  "aria-labelledby": ariaLabelledBy,
  ...props
}: React.ComponentProps<typeof SliderPrimitive.Root>) {
  // `_values` drives how many `Thumb` elements we render so the same
  // component handles both single-thumb and dual-thumb ranges without
  // a separate prop. Falls back to `[min, max]` if nothing was supplied
  // (Radix accepts this — the slider just sits at the full range).
  const _values = React.useMemo<number[]>(
    () =>
      Array.isArray(value)
        ? value
        : Array.isArray(defaultValue)
          ? defaultValue
          : [min, max],
    [value, defaultValue, min, max],
  )

  return (
    <SliderPrimitive.Root
      data-slot="slider"
      defaultValue={defaultValue}
      value={value}
      min={min}
      max={max}
      className={cn(
        "relative flex w-full touch-none select-none items-center data-[orientation=vertical]:h-full data-[orientation=vertical]:min-h-44 data-[orientation=vertical]:w-auto data-[orientation=vertical]:flex-col data-[disabled]:opacity-50",
        className,
      )}
      {...props}
    >
      <SliderPrimitive.Track
        data-slot="slider-track"
        className="relative grow overflow-hidden rounded-full bg-muted data-[orientation=horizontal]:h-1.5 data-[orientation=horizontal]:w-full data-[orientation=vertical]:h-full data-[orientation=vertical]:w-1.5"
      >
        <SliderPrimitive.Range
          data-slot="slider-range"
          className="absolute bg-primary data-[orientation=horizontal]:h-full data-[orientation=vertical]:w-full"
        />
      </SliderPrimitive.Track>
      {_values.map((_, index) => (
        <SliderPrimitive.Thumb
          key={`thumb-${index}`}
          data-slot="slider-thumb"
          aria-label={ariaLabel}
          aria-labelledby={ariaLabelledBy}
          className="block size-4 shrink-0 rounded-full border border-primary bg-background shadow-sm transition-colors hover:bg-accent focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background disabled:pointer-events-none disabled:opacity-50"
        />
      ))}
    </SliderPrimitive.Root>
  )
}

export { Slider }