"use client";

import { useEffect, useState, useRef } from "react";
import { requestNotificationPermission, onForegroundMessage } from "../utils/firebase";
import AuthService from "../services/AuthService";

export default function NotificationHandler() {
  const [notification, setNotification] = useState(null);
  const initialized = useRef(false);

  useEffect(() => {
    // Wait for hydration to complete
    const timer = setTimeout(() => {
      if (initialized.current) return;
      initialized.current = true;

      const token = AuthService.getToken();
      if (!token) {
        console.log("[Notifications] Not signed in, skipping");
        return;
      }

      console.log("[Notifications] Signed in, requesting permission...");
      requestNotificationPermission().then((fcmToken) => {
        if (fcmToken) {
          console.log("[Notifications] FCM token obtained:", fcmToken.substring(0, 20) + "...");
        }
      });

      const unsub = onForegroundMessage((payload) => {
        const title = payload.notification?.title || payload.data?.title || "Sweet Home";
        const body = payload.notification?.body || payload.data?.body || "";
        setNotification({ title, body });
        setTimeout(() => setNotification(null), 5000);
      });

      // Cleanup on unmount
      return () => unsub();
    }, 1000); // Wait 1s for hydration

    return () => clearTimeout(timer);
  }, []);

  if (!notification) return null;

  return (
    <div className="fixed bottom-4 left-4 right-4 md:left-auto md:right-4 md:w-96 bg-white rounded-xl shadow-2xl border border-gray-200 p-4 z-[9999] animate-slide-up">
      <div className="flex items-start gap-3">
        <div className="w-10 h-10 bg-amber-100 rounded-lg flex items-center justify-center flex-shrink-0">
          <span className="text-xl">🏠</span>
        </div>
        <div className="flex-1 min-w-0">
          <p className="font-bold text-gray-900 text-sm">{notification.title}</p>
          <p className="text-gray-600 text-sm mt-0.5">{notification.body}</p>
        </div>
        <button
          onClick={() => setNotification(null)}
          className="text-gray-400 hover:text-gray-600 flex-shrink-0"
        >
          ✕
        </button>
      </div>
    </div>
  );
}