"use client";

import { useEffect, useState, useRef } from 'react';
import { usePrivy } from '@privy-io/react-auth';
import { io, Socket } from 'socket.io-client';
import { fetchUserById } from '@/shared/data_fetcher';
import { ChatBubbleLeftIcon, XMarkIcon } from '@heroicons/react/24/outline';
import { profanity } from '@2toad/profanity';
interface ChatMessage {
  id: string;
  user: string;
  message: string;
  timestamp: number;
}

interface UserData {
  id: string;
  username: string;
  bio: string;
  x_profile_url: string;
}

export default function GlobalChat() {
  const { user, authenticated } = usePrivy();
  const [socket, setSocket] = useState<Socket | null>(null);
  const [messages, setMessages] = useState<ChatMessage[]>([]);
  const [newMessage, setNewMessage] = useState('');
  const [isConnected, setIsConnected] = useState(false);
  const [userData, setUserData] = useState<Record<string, UserData>>({});
  const [isCollapsed, setIsCollapsed] = useState(true);
  const [notification, setNotification] = useState<{ message: string; username: string } | null>(null);
  const notificationTimeoutRef = useRef<NodeJS.Timeout | undefined>(undefined);
  const messagesEndRef = useRef<HTMLDivElement>(null);

  const scrollToBottom = () => {
    messagesEndRef.current?.scrollIntoView({ behavior: "smooth" });
  };

  useEffect(() => {
    scrollToBottom();
  }, [messages]);

  useEffect(() => {
    if (!authenticated) return;

    // Initialize socket connection
    const socketInstance = io('https://wschat.duelfi.io', {
      auth: {
        token: user?.id // Using Privy user ID as authentication
      }
    });

    socketInstance.on('connect', () => {
      setIsConnected(true);
    });

    socketInstance.on('disconnect', () => {
      setIsConnected(false);
    });

    socketInstance.on('chat message', async (message: ChatMessage) => {
      setMessages(prev => [...prev, message]);
      // Fetch user data if we haven't already
      if (!userData[message.user]) {
        const userInfo = await fetchUserById(message.user);
        if (userInfo) {
          setUserData(prev => ({
            ...prev,
            [message.user]: userInfo
          }));
          // Show notification if chat is collapsed
          if (isCollapsed && message.user !== user?.id) {
            showNotification(message.message, userInfo.username);
          }
        }
      } else if (isCollapsed && message.user !== user?.id) {
        // Show notification if chat is collapsed and we already have the user data
        showNotification(message.message, userData[message.user].username);
      }
    });

    socketInstance.on('recent messages', (messages: ChatMessage[]) => {
      setMessages(messages);
      messages.forEach(message => {
        if (!userData[message.user]) {
          fetchUserById(message.user).then(userInfo => {
            setUserData(prev => ({ ...prev, [message.user]: userInfo }));
          });
        }
      });
    });

    setSocket(socketInstance);

    return () => {
      socketInstance.disconnect();
      if (notificationTimeoutRef.current) {
        clearTimeout(notificationTimeoutRef.current);
      }
    };
  }, [authenticated, user, isCollapsed]);

  const showNotification = (message: string, username: string) => {
    // Clear any existing notification timeout
    if (notificationTimeoutRef.current) {
      clearTimeout(notificationTimeoutRef.current);
    }
    
    setNotification({ message, username });
    
    // Set new timeout to clear notification
    notificationTimeoutRef.current = setTimeout(() => {
      setNotification(null);
    }, 3000);
  };

  const sendMessage = (e: React.FormEvent) => {
    e.preventDefault();
    if (!socket || !newMessage.trim() || !user) return;

    const message: ChatMessage = {
      id: Date.now().toString(),
      user: user.id,
      message: newMessage.trim(),
      timestamp: Date.now()
    };

    socket.emit('chat message', message);
    setNewMessage('');
  };

  if (!authenticated) {
    return (
      <div className="p-4 text-center text-gray-400">
        Please log in to join the chat
      </div>
    );
  }

  if (isCollapsed) {
    return (
      <div className="fixed bottom-4 right-4 flex items-center gap-2 z-50">
        {notification && (
          <div className="bg-[rgb(40,40,40)] text-white px-4 py-2 rounded-lg shadow-lg animate-fade-in-out">
            <div className="text-sm font-semibold">{notification.username}</div>
            <div className="text-sm text-gray-300">{notification.message}</div>
          </div>
        )}
        <button
          onClick={() => setIsCollapsed(false)}
          className="bg-[rgb(248,144,22)] text-black p-4 rounded-full shadow-lg hover:scale-110 transition-all duration-300"
        >
          <ChatBubbleLeftIcon className="w-6 h-6" />
        </button>
      </div>
    );
  }

  return (
    <div className="fixed bottom-4 right-4 w-80 bg-[rgb(30,30,30)] rounded-lg shadow-lg z-50">
      <div className="p-4 border-b border-gray-700 flex justify-between items-center">
        <div>
          <h3 className="text-lg font-semibold text-white">Global Chat</h3>
          <div className="text-sm text-gray-400">
            {isConnected ? 'Connected' : 'Disconnected'}
          </div>
        </div>
        <button
          onClick={() => setIsCollapsed(true)}
          className="text-gray-400 hover:text-white transition-colors"
        >
          <XMarkIcon className="w-6 h-6" />
        </button>
      </div>
      
      <div className="h-96 overflow-y-auto p-4 space-y-2">
        {messages.map((msg) => (
          <div 
            key={msg.id} 
            className={`p-2 rounded ${
              msg.user === user?.id 
                ? 'bg-[rgb(100,60,10)] bg-opacity-20' 
                : 'bg-[rgb(40,40,40)]'
            }`}
          >
            <div className="text-sm text-gray-400 flex justify-between items-center">
              <span>
                {msg.user === user?.id ? 'You' : userData[msg.user]?.username || `User ${msg.user.slice(0, 6)}`}
              </span>
              <span className="text-xs">
                {new Date(msg.timestamp).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' })}
              </span>
            </div>
            <div className="text-white">{profanity.censor(msg.message)}</div>
          </div>
        ))}
        <div ref={messagesEndRef} />
      </div>

      <form onSubmit={sendMessage} className="p-4 border-t border-gray-700">
        <div className="flex gap-2">
          <input
            type="text"
            value={newMessage}
            onChange={(e) => setNewMessage(e.target.value)}
            placeholder="Type a message..."
            className="flex-1 bg-[rgb(40,40,40)] text-white px-3 py-2 rounded focus:outline-none focus:ring-2 focus:ring-orange-500"
          />
          <button
            type="submit"
            className="bg-orange-500 text-white px-4 py-2 rounded hover:bg-orange-600 transition-colors"
          >
            Send
          </button>
        </div>
      </form>
    </div>
  );
}