"use client";

import { type InputHTMLAttributes, forwardRef, useState } from "react";
import { Eye, EyeOff } from "lucide-react";
import clsx from "clsx";

interface PasswordFieldProps extends Omit<InputHTMLAttributes<HTMLInputElement>, "type"> {
  label: string;
  error?: string;
  hint?: string;
}

/** Same visual language as `FormField`, plus a show/hide toggle - same
 * crossfade-icon-swap technique as `ApiKeyRow`'s Show/Hide button. */
export const PasswordField = forwardRef<HTMLInputElement, PasswordFieldProps>(
  ({ label, error, hint, id, className, ...props }, ref) => {
    const [revealed, setRevealed] = useState(false);
    const fieldId = id ?? props.name;

    return (
      <div>
        <label htmlFor={fieldId} className="block text-sm font-medium text-slate-700">
          {label}
        </label>
        <div className="relative mt-1">
          <input
            ref={ref}
            id={fieldId}
            type={revealed ? "text" : "password"}
            className={clsx(
              "focus-ring block w-full rounded-md border border-slate-300 px-3 py-2 pr-10 text-sm shadow-sm transition-colors duration-150",
              error && "border-red-400",
              className,
            )}
            aria-invalid={error ? "true" : "false"}
            aria-describedby={error ? `${fieldId}-error` : hint ? `${fieldId}-hint` : undefined}
            {...props}
          />
          <button
            type="button"
            onClick={() => setRevealed((r) => !r)}
            title={revealed ? "Hide password" : "Show password"}
            tabIndex={-1}
            className="focus-ring absolute inset-y-0 right-0 flex w-9 items-center justify-center text-slate-400 transition-colors duration-150 hover:text-slate-600"
          >
            <span className="relative block h-4 w-4">
              <Eye
                className={`absolute inset-0 h-4 w-4 transition-opacity duration-200 ${revealed ? "opacity-0" : "opacity-100"}`}
                aria-hidden
              />
              <EyeOff
                className={`absolute inset-0 h-4 w-4 transition-opacity duration-200 ${revealed ? "opacity-100" : "opacity-0"}`}
                aria-hidden
              />
            </span>
          </button>
        </div>
        {hint && !error && (
          <p id={`${fieldId}-hint`} className="mt-1 text-xs text-slate-500">
            {hint}
          </p>
        )}
        {error && (
          <p
            id={`${fieldId}-error`}
            className="mt-1 animate-fade-in text-xs text-red-600"
            role="alert"
          >
            {error}
          </p>
        )}
      </div>
    );
  },
);
PasswordField.displayName = "PasswordField";