frontend/src/components/ui/Button.tsx

import React from 'react';
import { classNames } from '@/utils/helpers';

interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement> {
  variant?: 'primary' | 'secondary' | 'ghost' | 'danger';
  size?: 'sm' | 'md' | 'lg';
  isLoading?: boolean;
  leftIcon?: React.ReactNode;
  rightIcon?: React.ReactNode;
}

export const Button: React.FC<ButtonProps> = ({
  children,
  variant = 'primary',
  size = 'md',
  isLoading = false,
  leftIcon,
  rightIcon,
  className,
  disabled,
  ...props
}) => {
  const baseStyles = 'btn';

  const variantStyles = {
    primary: 'btn-primary',
    secondary: 'btn-secondary',
    ghost: 'btn-ghost',
    danger: 'btn-danger',
  };

  const sizeStyles = {
    sm: 'px-3 py-1.5 text-xs',
    md: 'px-4 py-2 text-sm',
    lg: 'px-6 py-3 text-base',
  };

  return (
    <button
      className={classNames(
        baseStyles,
        variantStyles[variant],
        sizeStyles[size],
        className
      )}
      disabled={disabled || isLoading}
      {...props}
    >
      {isLoading && (
        <svg
          className="animate-spin h-4 w-4"
          xmlns="http://www.w3.org/2000/svg"
          fill="none"
          viewBox="0 0 24 24"
        >
          <circle
            className="opacity-25"
            cx="12"
            cy="12"
            r="10"
            stroke="currentColor"
            strokeWidth="4"
          />
          <path
            className="opacity-75"
            fill="currentColor"
            d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"
          />
        </svg>
      )}
      {!isLoading && leftIcon}
      {children}
      {!isLoading && rightIcon}
    </button>
  );
};

export default Button;