import { forwardRef, type ButtonHTMLAttributes, type ReactNode } from "react";

import {
  buttonClass,
  type ButtonSize,
  type ButtonVariant,
} from "@/lib/ui/variants";
import { Spinner } from "./Spinner";

interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
  children: ReactNode;
  variant?: ButtonVariant;
  size?: ButtonSize;
  // 忙碌态：显示转圈 + 禁用 + aria-busy，统一各处"处理中"的过程感。
  loading?: boolean;
}

export const Button = forwardRef<HTMLButtonElement, ButtonProps>(function Button(
  {
    children,
    className,
    variant,
    size,
    type = "button",
    loading = false,
    disabled,
    ...props
  },
  ref,
) {
  return (
    <button
      ref={ref}
      type={type}
      className={buttonClass({ variant, size, className })}
      disabled={disabled || loading}
      aria-busy={loading || undefined}
      {...props}
    >
      {loading ? <Spinner className="h-4 w-4" /> : null}
      {children}
    </button>
  );
});