"use client";

import { useRouter } from "next/navigation";

export function BackButton({ fallback = "/", className = "" }: { fallback?: string; className?: string }) {
  const router = useRouter();
  const goBack = () => {
    if (window.history.length > 1) router.back();
    else router.push(fallback);
  };

  return (
    <button data-component="back-button" type="button" aria-label="返回" onClick={goBack} className={`cursor-pointer size-6 ${className}`}>
      <svg viewBox="0 0 24 24" className="size-full" aria-hidden="true">
        <path d="M15 5l-7 7 7 7" fill="none" stroke="white" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" />
      </svg>
    </button>
  );
}