OTP Input

src/components/ui/OTPinput.tsx

"use client";

import * as React from "react";
import { OTPInput, OTPInputContext } from "input-otp";
import { cn } from "@/stories/lib/utils";
import { cva, type VariantProps } from "class-variance-authority";

// Variant classes for OTP input slots
const inputOTPSlotVariants = cva(
  "border border-input rounded-md relative flex items-center justify-center outline-none text-lg font-medium text-black dark:text-white border-b border-gray-300 transition-colors duration-200 underline decoration-cyan-400 underline-offset-4", // base styles

  {
    variants: {
      Otpvariant: {
        sm: "w-8 h-8 text-sm",
        md: "w-10 h-10 text-base",
        lg: "w-12 h-12 text-lg",
        xl: "w-14 h-14 text-xl",
      },
    },
    defaultVariants: {
      Otpvariant: "md",
    },
  },
);

// Wrapper around OTPInput to apply common classes
function InputOTP({
  className,
  containerClassName,
  ...props
}: React.ComponentProps<typeof OTPInput> & {
  containerClassName?: string;
}) {
  return (
    <OTPInput
      data-slot="input-otp"
      containerClassName={cn(
        "flex items-center gap-2 has-disabled:opacity-50",
        containerClassName,
      )}
      className={cn("disabled:cursor-not-allowed", className)}
      {...props}
    />
  );
}

// Group wrapper for slots
function InputOTPGroup({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      data-slot="input-otp-group"
      className={cn("flex items-center space-x-2", className)}
      {...props}
    />
  );
}

// Slot component with support for variants
type InputOTPSlotProps = React.ComponentProps<"div"> &
  VariantProps<typeof inputOTPSlotVariants> & {
    index: number;
  };

function InputOTPSlot({
  index,
  className,
  Otpvariant,
  ...props
}: InputOTPSlotProps) {
  const inputOTPContext = React.useContext(OTPInputContext);
  const { char, hasFakeCaret, isActive } = inputOTPContext?.slots[index] ?? {};
  const hasValue = !!char;
  return (
    <div
      data-slot="input-otp-slot"
      data-active={isActive}
      className={cn(
        inputOTPSlotVariants({ Otpvariant }),
        className,
        // Always apply base underline style
        "border-b border-gray-300",
        hasValue ? "border-b-1 border-cyan-400" : "border-b border-gray-300",

        // Apply active underline when focused/active
        isActive && "border-b-[1.5px] border-cyan-400",
      )}
      {...props}
    >
      {char}
      {hasFakeCaret && (
        <div className="pointer-events-none absolute inset-0 flex items-center justify-center ">
          <div className="animate-caret-blink bg-black h-4 w-px " />
        </div>
      )}
    </div>
  );
}

export { InputOTP, InputOTPGroup, InputOTPSlot };