import { ButtonHTMLAttributes, ReactNode } from 'react';

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

export function Button({
  children,
  variant = 'primary',
  size = 'md',
  isLoading = false,
  className = '',
  disabled,
  ...props
}: ButtonProps) {
  const baseStyles = 'font-semibold rounded-lg transition-all duration-200 inline-flex items-center justify-center';
  
  const variants = {
    primary: 'bg-emerald-600 hover:bg-emerald-700 text-white shadow-md hover:shadow-lg disabled:opacity-50 disabled:cursor-not-allowed',
    secondary: 'bg-gray-200 hover:bg-gray-300 text-gray-800',
    ghost: 'text-emerald-600 hover:text-emerald-700 hover:bg-emerald-50',
  };
  
  const sizes = {
    sm: 'px-4 py-2 text-sm',
    md: 'px-4 py-3 text-base',
    lg: 'px-6 py-4 text-lg',
  };

  return (
    <button
      className={`${baseStyles} ${variants[variant]} ${sizes[size]} ${className}`}
      disabled={disabled || isLoading}
      {...props}
    >
      {isLoading && (
        <svg className="animate-spin -ml-1 mr-3 h-5 w-5 text-white" 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>
      )}
      {children}
    </button>
  );
}