import React, { useState, useRef, useEffect } from 'react';
import { User, UserRole } from '../../types';

interface AvatarDropdownProps {
  user: User;
  onLogout: () => void;
  onAdmin?: () => void;
  onChangePassword?: () => void;
}

const getInitials = (name: string) => {
  return name ? name.charAt(0).toUpperCase() : '?';
};

const AvatarDropdown: React.FC<AvatarDropdownProps> = ({
  user,
  onLogout,
  onAdmin,
  onChangePassword,
}) => {
  const [isOpen, setIsOpen] = useState(false);
  const dropdownRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const handleClickOutside = (event: MouseEvent) => {
      if (
        dropdownRef.current &&
        !dropdownRef.current.contains(event.target as Node)
      ) {
        setIsOpen(false);
      }
    };
    document.addEventListener('mousedown', handleClickOutside);
    return () => document.removeEventListener('mousedown', handleClickOutside);
  }, []);

  return (
    <div className='relative' ref={dropdownRef}>
      <button
        onClick={() => setIsOpen(!isOpen)}
        onKeyDown={event => {
          if (event.key === 'Enter' || event.key === ' ') {
            event.preventDefault();
            setIsOpen(prev => !prev);
          }
        }}
        className='w-10 h-10 rounded-full bg-slate-200 dark:bg-slate-700 flex items-center justify-center text-lg font-bold text-slate-600 dark:text-slate-300 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 dark:focus:ring-offset-slate-900'
        aria-label='User menu'
      >
        {user.avatar ? (
          <img
            src={user.avatar}
            alt='User avatar'
            className='w-full h-full rounded-full object-cover'
          />
        ) : (
          <span>{getInitials(user.username)}</span>
        )}
      </button>

      {isOpen && (
        <div className='absolute right-0 mt-2 w-48 bg-white dark:bg-slate-800 rounded-md shadow-lg ring-1 ring-black ring-opacity-5 py-1 z-30 border dark:border-slate-700'>
          <div className='px-4 py-2 border-b border-slate-200 dark:border-slate-700'>
            <p className='text-sm text-slate-500 dark:text-slate-400'>
              Signed in as
            </p>
            <p className='text-sm font-medium text-slate-800 dark:text-slate-200 truncate'>
              {user.username}
            </p>
            {user.role === UserRole.ADMIN && (
              <p className='text-xs text-purple-600 dark:text-purple-400 font-medium'>
                Administrator
              </p>
            )}
          </div>

          {/* Password Change Option - Only for password-based accounts */}
          {user.password && onChangePassword && (
            <button
              onClick={() => {
                onChangePassword();
                setIsOpen(false);
              }}
              className='w-full text-left px-4 py-2 text-sm text-slate-700 dark:text-slate-200 hover:bg-slate-100 dark:hover:bg-slate-700'
            >
              Change Password
            </button>
          )}

          {/* Admin Interface - Only for admins */}
          {user.role === UserRole.ADMIN && onAdmin && (
            <button
              onClick={() => {
                onAdmin();
                setIsOpen(false);
              }}
              className='w-full text-left px-4 py-2 text-sm text-purple-700 dark:text-purple-300 hover:bg-slate-100 dark:hover:bg-slate-700 font-medium'
            >
              Admin Interface
            </button>
          )}

          <button
            onClick={() => {
              onLogout();
              setIsOpen(false);
            }}
            className='w-full text-left px-4 py-2 text-sm text-slate-700 dark:text-slate-200 hover:bg-slate-100 dark:hover:bg-slate-700'
          >
            Logout
          </button>
        </div>
      )}
    </div>
  );
};

export default AvatarDropdown;