Notification Center

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"use client";

import { useState } from "react";
import { cn } from "@/lib/utils";

interface Notification {
  id: string;
  type: "info" | "success" | "warning" | "error" | "message";
  title: string;
  description: string;
  time: string;
  read: boolean;
  avatar?: string;
  action?: { label: string; href: string };
}

const initialNotifications: Notification[] = [
  {
    id: "1",
    type: "message",
    title: "New message from Sarah",
    description: "Hey! Just wanted to check in on the project status...",
    time: "2 min ago",
    read: false,
    avatar: "SA",
  },
  {
    id: "2",
    type: "success",
    title: "Deployment successful",
    description: "Your app has been deployed to production.",
    time: "1 hour ago",
    read: false,
    action: { label: "View", href: "#" },
  },
  {
    id: "3",
    type: "warning",
    title: "Storage limit warning",
    description: "You've used 80% of your storage quota.",
    time: "3 hours ago",
    read: true,
    action: { label: "Upgrade", href: "#" },
  },
  {
    id: "4",
    type: "info",
    title: "New feature available",
    description: "Check out our new analytics dashboard.",
    time: "1 day ago",
    read: true,
  },
  {
    id: "5",
    type: "error",
    title: "Payment failed",
    description: "Your last payment could not be processed.",
    time: "2 days ago",
    read: true,
    action: { label: "Retry", href: "#" },
  },
];

export function NotificationCenter() {
  const [isOpen, setIsOpen] = useState(true);
  const [notifications, setNotifications] = useState(initialNotifications);
  const [filter, setFilter] = useState<"all" | "unread">("all");

  const unreadCount = notifications.filter((n) => !n.read).length;
  const filteredNotifications = filter === "unread"
    ? notifications.filter((n) => !n.read)
    : notifications;

  const markAsRead = (id: string) => {
    setNotifications((prev) =>
      prev.map((n) => (n.id === id ? { ...n, read: true } : n))
    );
  };

  const markAllAsRead = () => {
    setNotifications((prev) => prev.map((n) => ({ ...n, read: true })));
  };

  const deleteNotification = (id: string) => {
    setNotifications((prev) => prev.filter((n) => n.id !== id));
  };

  const getTypeStyles = (type: Notification["type"]) => {
    switch (type) {
      case "success": return "bg-emerald-100 text-emerald-600 dark:bg-emerald-900/30 dark:text-emerald-400";
      case "warning": return "bg-amber-100 text-amber-600 dark:bg-amber-900/30 dark:text-amber-400";
      case "error": return "bg-red-100 text-red-600 dark:bg-red-900/30 dark:text-red-400";
      case "message": return "bg-purple-100 text-purple-600 dark:bg-purple-900/30 dark:text-purple-400";
      default: return "bg-blue-100 text-blue-600 dark:bg-blue-900/30 dark:text-blue-400";
    }
  };

  return (
    <div className="relative">
      {/* Bell Button */}
      <button
        onClick={() => setIsOpen(!isOpen)}
        className="relative p-2 rounded-lg hover:bg-slate-100 dark:hover:bg-slate-800 transition-colors"
      >
        <BellIcon />
        {unreadCount > 0 && (
          <span className="absolute top-1 right-1 w-4 h-4 bg-red-500 text-white text-xs font-bold rounded-full flex items-center justify-center">
            {unreadCount}
          </span>
        )}
      </button>

      {/* Dropdown Panel */}
      {isOpen && (
        <div className="absolute right-0 mt-2 w-96 bg-white dark:bg-slate-900 rounded-xl border border-slate-200 dark:border-slate-800 shadow-xl overflow-hidden">
          {/* Header */}
          <div className="flex items-center justify-between px-4 py-3 border-b border-slate-200 dark:border-slate-800">
            <h3 className="font-semibold text-slate-900 dark:text-white">Notifications</h3>
            <div className="flex items-center gap-2">
              <button
                onClick={markAllAsRead}
                className="text-xs text-purple-600 hover:text-purple-700 font-medium"
              >
                Mark all read
              </button>
            </div>
          </div>

          {/* Filter Tabs */}
          <div className="flex border-b border-slate-200 dark:border-slate-800">
            <button
              onClick={() => setFilter("all")}
              className={cn(
                "flex-1 px-4 py-2 text-sm font-medium transition-colors",
                filter === "all"
                  ? "text-purple-600 border-b-2 border-purple-600"
                  : "text-slate-500 hover:text-slate-700 dark:hover:text-slate-300"
              )}
            >
              All
            </button>
            <button
              onClick={() => setFilter("unread")}
              className={cn(
                "flex-1 px-4 py-2 text-sm font-medium transition-colors",
                filter === "unread"
                  ? "text-purple-600 border-b-2 border-purple-600"
                  : "text-slate-500 hover:text-slate-700 dark:hover:text-slate-300"
              )}
            >
              Unread({unreadCount})
            </button>
          </div>

          {/* Notification List */}
          <div className="max-h-96 overflow-y-auto">
            {filteredNotifications.length === 0 ? (
              <div className="p-8 text-center">
                <p className="text-slate-500">No notifications</p>
              </div>
            ) : (
              filteredNotifications.map((notification) => (
                <div
                  key={notification.id}
                  onClick={() => markAsRead(notification.id)}
                  className={cn(
                    "flex gap-3 px-4 py-3 hover:bg-slate-50 dark:hover:bg-slate-800/50 cursor-pointer transition-colors border-b border-slate-100 dark:border-slate-800 last:border-0",
                    !notification.read && "bg-purple-50/50 dark:bg-purple-900/10"
                  )}
                >
                  {/* Icon/Avatar */}
                  {notification.avatar ? (
                    <div className="w-10 h-10 rounded-full bg-purple-600 flex items-center justify-center text-white font-semibold text-sm">
                      {notification.avatar}
                    </div>
                  ) : (
                    <div className={cn("w-10 h-10 rounded-full flex items-center justify-center", getTypeStyles(notification.type))}>
                      <NotificationIcon type={notification.type} />
                    </div>
                  )}

                  {/* Content */}
                  <div className="flex-1 min-w-0">
                    <div className="flex items-start justify-between gap-2">
                      <p className={cn("text-sm", !notification.read ? "font-semibold text-slate-900 dark:text-white" : "text-slate-700 dark:text-slate-300")}>
                        {notification.title}
                      </p>
                      {!notification.read && (
                        <span className="w-2 h-2 bg-purple-600 rounded-full flex-shrink-0 mt-1.5" />
                      )}
                    </div>
                    <p className="text-sm text-slate-500 truncate">{notification.description}</p>
                    <div className="flex items-center gap-3 mt-1">
                      <span className="text-xs text-slate-400">{notification.time}</span>
                      {notification.action && (
                        <a href={notification.action.href} className="text-xs text-purple-600 hover:text-purple-700 font-medium">
                          {notification.action.label}
                        </a>
                      )}
                    </div>
                  </div>

                  {/* Delete */}
                  <button
                    onClick={(e) => { e.stopPropagation(); deleteNotification(notification.id); }}
                    className="p-1 text-slate-400 hover:text-red-500 rounded opacity-0 group-hover:opacity-100 hover:opacity-100 transition-opacity"
                  >
                    <XIcon />
                  </button>
                </div>
              ))
            )}
          </div>

          {/* Footer */}
          <div className="px-4 py-3 border-t border-slate-200 dark:border-slate-800">
            <a href="#" className="block text-center text-sm text-purple-600 hover:text-purple-700 font-medium">
              View all notifications
            </a>
          </div>
        </div>
      )}
    </div>
  );
}

function BellIcon() { return <svg className="w-6 h-6 text-slate-600 dark:text-slate-400" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 17h5l-1.405-1.405A2.032 2.032 0 0118 14.158V11a6.002 6.002 0 00-4-5.659V5a2 2 0 10-4 0v.341C7.67 6.165 6 8.388 6 11v3.159c0 .538-.214 1.055-.595 1.436L4 17h5m6 0v1a3 3 0 11-6 0v-1m6 0H9" /></svg>; }
function XIcon() { return <svg className="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" /></svg>; }
function NotificationIcon({ type }: { type: string }) {
  switch (type) {
    case "success": return <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 13l4 4L19 7" /></svg>;
    case "warning": return <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" /></svg>;
    case "error": return <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" /></svg>;
    default: return <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" /></svg>;
  }
}