"use client";

import { Bell, CheckCheck, Loader2, Trash2 } from "lucide-react";
import { Button } from "@/components/ui/button";
import { Badge } from "@/components/ui/badge";
import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
import { ScrollArea } from "@/components/ui/scroll-area";
import { useNotifications } from "@/contexts/NotificationsContext";
import type { NotificationSchema } from "@/lib/types";
import { cn, formatJalali } from "@/lib/utils";

const connectionLabels = {
  idle: "خاموش",
  connecting: "در حال اتصال",
  connected: "متصل",
  disconnected: "قطع شده",
} as const;

function NotificationItem({
  notification,
  onOpen,
  onDelete,
}: {
  notification: NotificationSchema;
  onOpen: (notification: NotificationSchema) => Promise<unknown>;
  onDelete: (notification: NotificationSchema) => Promise<unknown>;
}) {
  return (
    <div
      className={cn(
        "rounded-2xl border border-border/70 bg-background/75 p-3 text-right transition hover:border-primary/30 hover:bg-muted/35",
        !notification.is_seen && "border-primary/30 bg-primary/5",
      )}
    >
      <div className="flex items-start justify-between gap-3">
        <Button
          type="button"
          size="icon"
          variant="ghost"
          className="h-8 w-8 shrink-0 rounded-full text-muted-foreground hover:text-destructive"
          onClick={() => void onDelete(notification)}
        >
          <Trash2 className="h-4 w-4" />
        </Button>
        <button
          type="button"
          onClick={() => void onOpen(notification)}
          className="min-w-0 flex-1 space-y-1 text-right"
        >
          <div className="flex items-center justify-end gap-2">
            {!notification.is_seen ? (
              <span className="h-2.5 w-2.5 rounded-full bg-primary" />
            ) : null}
            <p className="truncate font-semibold">{notification.title}</p>
          </div>
          <p className="line-clamp-2 text-sm text-muted-foreground">
            {notification.message}
          </p>
          <p className="text-xs text-muted-foreground/80">
            {formatJalali(notification.created_at, false)}
          </p>
        </button>
      </div>
    </div>
  );
}

export default function NotificationsBell() {
  const {
    notifications,
    unreadCount,
    totalCount,
    hasMore,
    isLoading,
    isLoadingMore,
    connectionStatus,
    loadMore,
    markAllAsSeen,
    deleteNotification,
    openNotification,
  } = useNotifications();

  return (
    <Popover>
      <PopoverTrigger asChild>
        <Button
          type="button"
          variant="ghost"
          size="icon"
          className="relative h-10 w-10 rounded-full border-0 bg-transparent shadow-none transition hover:bg-background/45 hover:shadow-sm"
          aria-label="اعلان‌ها"
        >
          <Bell className="h-4 w-4" />
          {unreadCount > 0 ? (
            <span className="absolute -left-1 -top-1 flex min-w-5 items-center justify-center rounded-full bg-primary px-1.5 py-0.5 text-[10px] font-semibold text-primary-foreground">
              {unreadCount > 9 ? "9+" : unreadCount}
            </span>
          ) : null}
        </Button>
      </PopoverTrigger>
      <PopoverContent className="w-[min(92vw,26rem)] rounded-[1.5rem] border border-border/70 bg-background/95 p-0 shadow-xl backdrop-blur-xl" align="end" sideOffset={12}>
        <div className="border-b border-border/70 px-4 py-4 text-right">
          <div className="flex items-center justify-between gap-3">
            <div className="flex items-center gap-2">
              <Badge variant={connectionStatus === "connected" ? "default" : "secondary"}>
                {connectionLabels[connectionStatus]}
              </Badge>
              {unreadCount > 0 ? (
                <Button
                  type="button"
                  variant="ghost"
                  size="sm"
                  className="rounded-full"
                  onClick={() => void markAllAsSeen()}
                >
                  <CheckCheck className="ml-2 h-4 w-4" />
                  خواندن همه
                </Button>
              ) : null}
            </div>
            <div>
              <p className="font-semibold">اعلان‌ها</p>
              <p className="mt-1 text-xs text-muted-foreground">
                {totalCount > 0 ? `${totalCount} مورد ثبت شده` : "هنوز اعلانی ندارید."}
              </p>
            </div>
          </div>
        </div>

        <ScrollArea className="max-h-[24rem] px-4 py-4">
          <div className="space-y-3">
            {isLoading ? (
              <div className="flex items-center justify-center gap-2 py-10 text-sm text-muted-foreground">
                <Loader2 className="h-4 w-4 animate-spin" />
                در حال بارگذاری اعلان‌ها...
              </div>
            ) : notifications.length ? (
              notifications.map((notification) => (
                <NotificationItem
                  key={notification.id}
                  notification={notification}
                  onOpen={openNotification}
                  onDelete={deleteNotification}
                />
              ))
            ) : (
              <div className="rounded-2xl border border-dashed border-border/70 bg-muted/20 px-4 py-10 text-center text-sm text-muted-foreground">
                اعلان تازه‌ای برای شما ثبت نشده است.
              </div>
            )}
          </div>
        </ScrollArea>

        {hasMore ? (
          <div className="border-t border-border/70 px-4 py-3">
            <Button
              type="button"
              variant="secondary"
              className="w-full rounded-2xl"
              onClick={() => void loadMore()}
              disabled={isLoadingMore}
            >
              {isLoadingMore ? (
                <>
                  <Loader2 className="ml-2 h-4 w-4 animate-spin" />
                  در حال بارگذاری...
                </>
              ) : (
                "نمایش موارد بیشتر"
              )}
            </Button>
          </div>
        ) : null}
      </PopoverContent>
    </Popover>
  );
}