"use client";

import {
  Bell,
  ExternalLink,
  MessageSquare,
  ShoppingCart,
  TrendingUp,
} from "lucide-react";
import Link from "next/link";
import { useLocale } from "next-intl";
import { Button } from "@/components/ui/button";
// ScrollArea não disponível, usando div com overflow
import { Separator } from "@/components/ui/separator";

interface Notification {
  notification_id: number;
  notification_type: string;
  title: string;
  message: string;
  is_read: boolean;
  related_id: number | null;
  created_at: string;
}

interface NotificationDropdownProps {
  notifications: Notification[];
  onMarkAsRead: (notificationId: number) => Promise<void>;
  onViewAll?: () => void;
}

function formatTimeAgo(date: Date): string {
  const seconds = Math.floor((Date.now() - date.getTime()) / 1000);
  if (seconds < 60) return "há alguns segundos";
  const minutes = Math.floor(seconds / 60);
  if (minutes < 60)
    return `há ${minutes} ${minutes === 1 ? "minuto" : "minutos"}`;
  const hours = Math.floor(minutes / 60);
  if (hours < 24) return `há ${hours} ${hours === 1 ? "hora" : "horas"}`;
  const days = Math.floor(hours / 24);
  if (days < 30) return `há ${days} ${days === 1 ? "dia" : "dias"}`;
  const months = Math.floor(days / 30);
  if (months < 12) return `há ${months} ${months === 1 ? "mês" : "meses"}`;
  const years = Math.floor(months / 12);
  return `há ${years} ${years === 1 ? "ano" : "anos"}`;
}

function getNotificationIcon(type: string) {
  switch (type) {
    case "purchase":
    case "sale":
      return <ShoppingCart className="h-4 w-4" />;
    case "bid":
      return <TrendingUp className="h-4 w-4" />;
    case "system":
      return <Bell className="h-4 w-4" />;
    default:
      return <MessageSquare className="h-4 w-4" />;
  }
}

function getNotificationColor(type: string) {
  switch (type) {
    case "purchase":
    case "sale":
      return "bg-green-500";
    case "bid":
      return "bg-blue-500";
    case "system":
      return "bg-yellow-500";
    default:
      return "bg-gray-500";
  }
}

export function NotificationDropdown({
  notifications,
  onMarkAsRead,
  onViewAll,
}: NotificationDropdownProps) {
  const locale = useLocale();

  const handleNotificationClick = async (notification: Notification) => {
    if (!notification.is_read) {
      await onMarkAsRead(notification.notification_id);
    }
  };

  if (notifications.length === 0) {
    return (
      <div className="w-80 p-4 text-center text-sm text-muted-foreground">
        Nenhuma notificação
      </div>
    );
  }

  return (
    <div className="w-80 flex flex-col">
      <div className="p-4 border-b">
        <div className="flex items-center justify-between">
          <h3 className="font-semibold text-sm">Notificações</h3>
          {onViewAll && (
            <Button
              variant="ghost"
              size="sm"
              onClick={onViewAll}
              className="h-auto p-0 text-xs"
            >
              Ver todas
            </Button>
          )}
        </div>
      </div>

      <div className="h-[400px] overflow-y-auto">
        <div className="p-2">
          {notifications.map((notification, index) => (
            <div key={notification.notification_id}>
              <button
                onClick={() => handleNotificationClick(notification)}
                className={`w-full text-left p-3 rounded-lg hover:bg-muted transition-colors ${
                  !notification.is_read ? "bg-muted/50" : ""
                }`}
              >
                <div className="flex items-start gap-3">
                  <div
                    className={`${getNotificationColor(
                      notification.notification_type,
                    )} rounded-full p-2 text-white flex-shrink-0`}
                  >
                    {getNotificationIcon(notification.notification_type)}
                  </div>
                  <div className="flex-1 min-w-0">
                    <div className="flex items-start justify-between gap-2">
                      <h4 className="font-medium text-sm">
                        {notification.title}
                      </h4>
                      {!notification.is_read && (
                        <div className="h-2 w-2 bg-primary rounded-full flex-shrink-0 mt-1" />
                      )}
                    </div>
                    <p className="text-xs text-muted-foreground mt-1 line-clamp-2">
                      {notification.message}
                    </p>
                    <p className="text-xs text-muted-foreground mt-1">
                      {formatTimeAgo(new Date(notification.created_at))}
                    </p>
                    {notification.related_id && (
                      <Link
                        href={`/${locale}/market`}
                        onClick={(e) => e.stopPropagation()}
                        className="text-xs text-primary hover:underline mt-1 inline-flex items-center gap-1"
                      >
                        Ver anúncio <ExternalLink className="h-3 w-3" />
                      </Link>
                    )}
                  </div>
                </div>
              </button>
              {index < notifications.length - 1 && (
                <Separator className="my-2" />
              )}
            </div>
          ))}
        </div>
      </div>
    </div>
  );
}