import type { ReactNode } from "react";
import type { LucideIcon } from "lucide-react";
import { X } from "lucide-react";

type BannerTone = "accent" | "warning";

const TONES: Record<BannerTone, { bar: string; icon: string; action: string }> = {
  accent: { bar: "bg-accent/15 border-accent/30", icon: "text-accent", action: "bg-accent text-accent-fg" },
  warning: { bar: "bg-amber-500/15 border-amber-500/30", icon: "text-amber-500", action: "bg-amber-500 text-black" },
};

// Shared top-of-app notification bar. VersionBanner and DemoBanner are thin wrappers over this;
// a future news-ticker variant can build on the same shell (rotating content as children).
export default function Banner({
  tone,
  icon: Icon,
  children,
  action,
  onDismiss,
  dismissTitle,
}: {
  tone: BannerTone;
  icon: LucideIcon;
  children: ReactNode;
  action?: { label: string; onClick: () => void };
  onDismiss?: () => void;
  dismissTitle?: string;
}) {
  const c = TONES[tone];
  return (
    <div className={`shrink-0 flex items-center gap-2 px-4 py-2 text-sm border-b text-fg ${c.bar}`}>
      <Icon className={`w-4 h-4 shrink-0 ${c.icon}`} />
      <span className="min-w-0">{children}</span>
      {action && (
        <button
          onClick={action.onClick}
          className={`ml-1 px-2.5 py-1 rounded-lg font-semibold hover:opacity-90 transition ${c.action}`}
        >
          {action.label}
        </button>
      )}
      {onDismiss && (
        <button
          onClick={onDismiss}
          title={dismissTitle}
          className="ml-auto p-1 rounded-md text-muted hover:text-fg hover:bg-card transition"
        >
          <X className="w-4 h-4" />
        </button>
      )}
    </div>
  );
}