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import React, { useEffect, useState } from 'react';
import { useWebSocket } from '@/context/StableWebSocketContext';

interface TypingIndicatorProps {
  roomId: string;
}

const TypingIndicator: React.FC<TypingIndicatorProps> = ({ roomId }) => {
  const [displayText, setDisplayText] = useState('');
  const [typingUsers, setTypingUsers] = useState<any[]>([]);

  useEffect(() => {
    // Listen for typing events from WebSocket
    const handleTypingEvent = (event: CustomEvent) => {
      const message = event.detail;
      if (message.type === 'TYPING' && message.data.roomId === roomId) {
        const { userName, isTyping, timestamp } = message.data;
        
        setTypingUsers(prev => {
          if (isTyping) {
            // Add or update typing user
            const filtered = prev.filter(u => u.userName !== userName);
            return [...filtered, { userName, timestamp }];
          } else {
            // Remove typing user
            return prev.filter(u => u.userName !== userName);
          }
        });
      }
    };

    window.addEventListener('websocket-message', handleTypingEvent as EventListener);
    
    // Update display text based on typing users
    const currentTime = Date.now();
    const activeTyping = typingUsers.filter(t => currentTime - t.timestamp < 5000);

    if (activeTyping.length === 0) {
      setDisplayText('');
    } else if (activeTyping.length === 1) {
      setDisplayText(
    } else if (activeTyping.length === 2) {
      setDisplayText(
    } else {
      setDisplayText(
    }

    return () => {
      window.removeEventListener('websocket-message', handleTypingEvent as EventListener);
    };
  }, [typingUsers, roomId]);

  if (!displayText) return null;

  return (
    <div className="px-4 py-2 text-sm text-gray-500 dark:text-gray-400 italic flex items-center space-x-2">
      <div className="flex space-x-1">
        <div className="w-1 h-1 bg-gray-400 rounded-full animate-bounce" style={{ animationDelay: '0ms' }} />
        <div className="w-1 h-1 bg-gray-400 rounded-full animate-bounce" style={{ animationDelay: '150ms' }} />
        <div className="w-1 h-1 bg-gray-400 rounded-full animate-bounce" style={{ animationDelay: '300ms' }} />
      </div>
      <span>{displayText}</span>
    </div>
  );
};

export default TypingIndicator;