import { useCallback, useState } from "react";
import { X } from "lucide-react";
import { useNavigate } from "react-router-dom";
import { Button } from "@/components/ui/button";
import {
  AlertDialog, AlertDialogAction, AlertDialogCancel,
  AlertDialogContent, AlertDialogDescription,
  AlertDialogFooter, AlertDialogHeader, AlertDialogTitle,
} from "@/components/ui/alert-dialog";
import { useAdminNotifications } from "@/contexts/AdminNotificationContext";
import { NotificationIcon, getTypeAccent, resolveStickyStyle } from "@/components/generic/notificationDisplay";

// Admin counterpart to StickyAnnouncementBar (client). Only supports the
// explicit link_url from the "On Open" section — the type-based fallback
// resolver in notificationDisplay.jsx points at client-only routes
// (/course/:id, /plans, /group/:id), which don't exist in the admin app.
export default function AdminStickyAnnouncementBar() {
  const navigate = useNavigate();
  const { stickyAnnouncement, markSeen } = useAdminNotifications();
  const [detailsOpen, setDetailsOpen] = useState(false);

  const onDismiss = useCallback(async () => {
    if (!stickyAnnouncement) return;
    await markSeen(stickyAnnouncement.notification_id);
  }, [stickyAnnouncement, markSeen]);

  // Opening the dialog must NOT mark it seen — markSeen clears
  // stickyAnnouncement, which would unmount this component (dialog included)
  // before it ever shows. Only the X button dismisses/marks seen.
  const onClickBanner = useCallback(() => {
    if (!stickyAnnouncement) return;
    setDetailsOpen(true);
  }, [stickyAnnouncement]);

  if (!stickyAnnouncement) return null;

  const accentClass = getTypeAccent(stickyAnnouncement.type);
  const inlineStyle = resolveStickyStyle(stickyAnnouncement.data);
  const linkUrl = stickyAnnouncement.data?.linkUrl || null;

  const openLink = () => {
    if (!linkUrl) return;
    if (linkUrl.startsWith("/")) navigate(linkUrl);
    else window.open(linkUrl, "_blank", "noopener,noreferrer");
  };

  return (
    <>
      <div
        role="status"
        className="w-full border-b shadow-sm px-4 md:px-6"
      >
        <div
          onClick={onClickBanner}
          className="w-full cursor-pointer bg-card rounded-none py-3 flex items-center justify-between gap-4"
          style={inlineStyle ?? undefined}
        >
          <div className="flex items-start gap-3 min-w-0">
            <div className={`flex h-9 w-9 items-center justify-center rounded ${accentClass}`}>
              <NotificationIcon type={stickyAnnouncement.type} className="h-5 w-5" />
            </div>

            <div className="min-w-0">
              <p className="text-sm font-semibold leading-snug truncate">
                {stickyAnnouncement.title || "Announcement"}
              </p>
              <p className="text-sm text-muted-foreground leading-snug line-clamp-2">
                {stickyAnnouncement.message || ""}
              </p>
            </div>
          </div>

          <Button
            variant="outline"
            size="icon"
            onClick={(e) => {
              e.preventDefault();
              e.stopPropagation();
              void onDismiss();
            }}
            aria-label="Dismiss sticky announcement"
            title="Dismiss"
          >
            <X className="size-4" />
          </Button>
        </div>
      </div>

      <AlertDialog open={detailsOpen} onOpenChange={setDetailsOpen}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle className="flex items-center gap-2">
              <div className={`flex h-8 w-8 items-center justify-center rounded shrink-0 ${accentClass}`}>
                <NotificationIcon type={stickyAnnouncement.type} className="h-4 w-4" />
              </div>
              {stickyAnnouncement.title || "Announcement"}
            </AlertDialogTitle>
            <AlertDialogDescription asChild>
              <p className="whitespace-pre-wrap text-left pt-1 text-foreground">
                {stickyAnnouncement.message || ""}
              </p>
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogCancel>Close</AlertDialogCancel>
            {linkUrl && (
              <AlertDialogAction onClick={openLink}>
                Open Link
              </AlertDialogAction>
            )}
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>
    </>
  );
}