import { useState, useEffect } from 'react';

export default function CollaboratorFacepile({ collectionId, creatorEmail }) {
  const [collaborators, setCollaborators] = useState([]);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    if (collectionId) {
      fetchCollaborators();
    }
  }, [collectionId]);

  const fetchCollaborators = async () => {
    try {
      const response = await fetch(`/api/collections/${collectionId}/permissions`, {
        headers: {
          'Authorization': `Bearer ${localStorage.getItem('auth_token')}`
        }
      });
      
      if (response.ok) {
        const data = await response.json();
        setCollaborators(data.permissions || []);
      } else {
        console.error('Failed to fetch collaborators:', response.status);
        setCollaborators([]); // Fallback to empty array
      }
    } catch (error) {
      console.error('Error fetching collaborators:', error);
      setCollaborators([]); // Fallback to empty array
    } finally {
      setLoading(false);
    }
  };

  if (loading) {
    return (
      <div className="flex items-center space-x-2">
        <span className="text-sm" style={{ color: 'var(--text-secondary)' }}>
          Crafted by {creatorEmail}
        </span>
        <div className="flex -space-x-2">
          <div className="w-6 h-6 bg-gray-200 rounded-full animate-pulse"></div>
        </div>
      </div>
    );
  }

  // Include creator and active collaborators
  const allUsers = [
    { email: creatorEmail, role: 'owner', status: 'active' },
    ...collaborators.filter(c => c.status === 'active')
  ];

  const visibleUsers = allUsers.slice(0, 4); // Show max 4 faces
  const remainingCount = Math.max(0, allUsers.length - 4);

  const getRoleColor = (role) => {
    switch (role) {
      case 'owner': return 'bg-purple-600';
      case 'editor': return 'bg-blue-600';
      case 'viewer': return 'bg-green-600';
      default: return 'bg-gray-600';
    }
  };

  const getRoleLabel = (role) => {
    switch (role) {
      case 'owner': return 'Owner';
      case 'editor': return 'Collaborator';
      case 'viewer': return 'Viewer';
      default: return 'Member';
    }
  };

  // Debug: Log removed - functionality working

  return (
    <div className="flex items-center space-x-2">
      <span className="text-sm" style={{ color: 'var(--text-secondary)' }}>
        Crafted by {creatorEmail}
        {allUsers.length > 1 && (
          <span className="ml-1">
            & {allUsers.length - 1} other{allUsers.length > 2 ? 's' : ''}
          </span>
        )}
      </span>
      
      {allUsers.length > 1 && (
        <div className="flex -space-x-2">
          {visibleUsers.map((user, index) => (
            <div
              key={user.email || index}
              className="relative group"
            >
              <div
                className={`w-6 h-6 ${getRoleColor(user.role)} rounded-full flex items-center justify-center text-white text-xs font-bold border-2 border-white hover:z-10 transition-transform hover:scale-110 cursor-pointer`}
              >
                {user.email ? user.email.charAt(0).toUpperCase() : '?'}
              </div>
              
              {/* Tooltip */}
              <div className="absolute bottom-8 left-1/2 transform -translate-x-1/2 opacity-0 group-hover:opacity-100 transition-opacity duration-200 pointer-events-none z-20">
                <div className="bg-gray-900 text-white text-xs rounded-lg py-2 px-3 whitespace-nowrap">
                  <div className="font-medium">{user.email}</div>
                  <div className="text-gray-300">{getRoleLabel(user.role)}</div>
                  {/* Arrow */}
                  <div className="absolute top-full left-1/2 transform -translate-x-1/2 w-0 h-0 border-l-4 border-r-4 border-t-4 border-transparent border-t-gray-900"></div>
                </div>
              </div>
            </div>
          ))}
          
          {remainingCount > 0 && (
            <div className="relative group">
              <div className="w-6 h-6 bg-gray-400 rounded-full flex items-center justify-center text-white text-xs font-bold border-2 border-white hover:z-10 transition-transform hover:scale-110 cursor-pointer">
                +{remainingCount}
              </div>
              
              {/* Tooltip for remaining users */}
              <div className="absolute bottom-8 left-1/2 transform -translate-x-1/2 opacity-0 group-hover:opacity-100 transition-opacity duration-200 pointer-events-none z-20">
                <div className="bg-gray-900 text-white text-xs rounded-lg py-2 px-3 whitespace-nowrap max-w-48">
                  <div className="font-medium mb-1">{remainingCount} more collaborator{remainingCount > 1 ? 's' : ''}</div>
                  {allUsers.slice(4).map((user, index) => (
                    <div key={user.email || index} className="text-gray-300">
                      {user.email} ({getRoleLabel(user.role)})
                    </div>
                  ))}
                  {/* Arrow */}
                  <div className="absolute top-full left-1/2 transform -translate-x-1/2 w-0 h-0 border-l-4 border-r-4 border-t-4 border-transparent border-t-gray-900"></div>
                </div>
              </div>
            </div>
          )}
        </div>
      )}
    </div>
  );
}