System Alert

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import { type ClassValue, clsx } from "clsx";
import { twMerge } from "tailwind-merge";
 
export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs));
}

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"use client";
 
import {
  forwardRef,
  useEffect,
  useState,
  type ComponentPropsWithoutRef,
} from "react";
 
import { cn } from "@/lib/cn";
import { AlertTriangle, X } from "lucide-react";
 
const EXIT_MS = 260;
 
export type SystemAlertBannerProps = Readonly<
  {
    appName?: string;
    title?: string;
    description?: string;
    time?: string;
    showTriggerLabel?: string;
    onDismiss?: () => void;
    onShow?: () => void;
  } & ComponentPropsWithoutRef<"output">
>;
 
// System alert — iOS grid, amber app tile, Settings-style header.
export const SystemAlertBanner = forwardRef<
  HTMLOutputElement,
  SystemAlertBannerProps
>(
  (
    {
      className,
      appName = "Settings",
      title = "Storage",
      description = "Your device is almost full. You can manage storage in Settings.",
      time = "now",
      showTriggerLabel = "Show system alert",
      onDismiss,
      onShow,
      ...props
    },
    ref,
  ) => {
    const [phase, setPhase] = useState<"open" | "closing" | "closed">("open");
 
    useEffect(() => {
      if (phase !== "closing") return;
      const timer = globalThis.setTimeout(() => setPhase("closed"), EXIT_MS);
      return () => globalThis.clearTimeout(timer);
    }, [phase]);
 
    const handleDismiss = () => {
      if (phase !== "open") return;
      setPhase("closing");
      onDismiss?.();
    };
 
    const handleShow = () => {
      setPhase("open");
      onShow?.();
    };
 
    if (phase === "closed") {
      return (
        <button
          type="button"
          onClick={handleShow}
          className={cn(
            "cursor-pointer rounded-xl bg-[#f2f2f7] px-4 py-2 text-xs font-medium text-neutral-700",
            "opacity-100 starting:opacity-0",
            "transition-opacity duration-280 ease-out hover:bg-[#e8e8ed]",
            className,
          )}
        >
          {showTriggerLabel}
        </button>
      );
    }
 
    return (
      <output
        ref={ref}
        data-slot="system-alert-banner"
        data-phase={phase}
        className={cn(
          "relative block w-80 overflow-hidden rounded-[1.25rem] border border-white/70 bg-white/90 p-0 font-sans",
          "shadow-[0_8px_32px_-4px_rgba(0,0,0,0.10)] backdrop-blur-xl",
          "translate-y-0 opacity-100 starting:-translate-y-2.5 starting:opacity-0",
          "transition-all duration-340 ease-[cubic-bezier(0.25,0.46,0.45,0.94)]",
          "data-[phase=closing]:-translate-y-2 data-[phase=closing]:opacity-0",
          "data-[phase=closing]:duration-260 data-[phase=closing]:ease-[cubic-bezier(0.4,0,0.6,1)]",
          className,
        )}
        {...props}
      >
        <button
          type="button"
          onClick={handleDismiss}
          aria-label="Dismiss notification"
          className="absolute top-2 right-2 z-10 flex size-6 cursor-pointer items-center justify-center rounded-full text-neutral-400 transition-colors duration-150 hover:bg-black/5 hover:text-neutral-600"
        >
          <X size={10} />
        </button>
 
        <div className="grid grid-cols-[2.375rem_minmax(0,1fr)] items-start gap-x-3 gap-y-1 px-3.5 py-3 pr-9">
          <div className="row-span-2 mt-0.5 flex size-9.5 shrink-0 items-center justify-center rounded-[0.625rem] bg-amber-400 shadow-sm ring-1 ring-black/2">
            <AlertTriangle
              size={18}
              strokeWidth={2}
              className="text-white"
              aria-hidden
            />
          </div>
 
          <div className="col-start-2 flex min-w-0 items-center justify-between gap-2">
            <p className="truncate text-[13px] leading-tight font-semibold text-neutral-900">
              {appName}
            </p>
            <span className="shrink-0 text-[11px] leading-none tracking-tight text-neutral-400 capitalize">
              {time}
            </span>
          </div>
 
          <p className="col-start-2 line-clamp-2 text-[13px] leading-[1.38] text-neutral-700">
            <span className="font-semibold text-neutral-900">{title}</span>
            <span className="text-neutral-500">: </span>
            {description}
          </p>
        </div>
      </output>
    );
  },
);
 
SystemAlertBanner.displayName = "SystemAlertBanner";