import { Button as ButtonPrimitive } from "@base-ui/react/button"
import { cva, type VariantProps } from "class-variance-authority"
import { ArrowRight } from "lucide-react"

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

const buttonVariants = cva(
  "group/button relative inline-flex shrink-0 items-center justify-center rounded-full border font-medium whitespace-nowrap transition-[background-color,border-color,color,scale] duration-200 ease-out select-none active:not-aria-[haspopup]:scale-[0.97] disabled:pointer-events-none disabled:opacity-50 aria-invalid:border-destructive [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
  {
    variants: {
      variant: {
        // Black on light, white on dark
        solid:
          "border-transparent bg-fg text-bg hover:bg-ink-800 dark:hover:bg-ink-200",
        // Hairline only
        outline:
          "border-fg/20 bg-transparent text-fg hover:border-fg/60 aria-expanded:border-fg/60",
        // Only on top of glass surfaces or dark sections
        glass:
          "border-white/15 bg-white/10 text-white backdrop-blur-md hover:bg-white/20",
        ghost: "border-transparent text-fg hover:bg-fg/5 aria-expanded:bg-fg/5",
        link: "rounded-none border-transparent px-0 text-fg underline-offset-4 hover:underline",
      },
      size: {
        default: "h-11 gap-2 px-5 text-[0.9375rem]",
        sm: "h-9 gap-1.5 px-4 text-sm",
        lg: "h-13 gap-2 px-7 text-base",
        icon: "size-10",
        "icon-sm": "size-8",
      },
    },
    defaultVariants: {
      variant: "solid",
      size: "default",
    },
  }
)

function Button({
  className,
  variant = "solid",
  size = "default",
  ...props
}: ButtonPrimitive.Props & VariantProps<typeof buttonVariants>) {
  return (
    <ButtonPrimitive
      data-slot="button"
      className={cn(buttonVariants({ variant, size, className }))}
      {...props}
    />
  )
}

/**
 * The arrow is not part of the label: it appears on hover only.
 * Place it as the last child of a button or a link styled with `buttonVariants`.
 */
function ButtonArrow({ className }: { className?: string }) {
  return (
    <span
      aria-hidden="true"
      className={cn(
        "-ml-2 grid w-0 overflow-hidden opacity-0 transition-[width,margin,opacity] duration-200 ease-out group-hover/button:ml-0 group-hover/button:w-4 group-hover/button:opacity-100 group-focus-visible/button:ml-0 group-focus-visible/button:w-4 group-focus-visible/button:opacity-100",
        className
      )}
    >
      <ArrowRight className="size-4" />
    </span>
  )
}

export { Button, ButtonArrow, buttonVariants }