import { ReactNode, ButtonHTMLAttributes } from 'react';
import { getButtonClasses, defaultLayoutConfig, type LayoutConfig } from '~/lib/layout-utils';

interface ButtonProps extends Omit<ButtonHTMLAttributes<HTMLButtonElement>, 'className'> {
  children: ReactNode;
  className?: string;
  config?: Partial<LayoutConfig>;
  variant?: 'primary' | 'secondary' | 'danger' | 'outline' | 'ghost';
  size?: 'sm' | 'md' | 'lg';
  fullWidth?: boolean;
  loading?: boolean;
  icon?: ReactNode;
  iconPosition?: 'start' | 'end';
}

export function Button({ 
  children, 
  className = '', 
  config = {},
  variant = 'primary',
  size = 'md',
  fullWidth = false,
  loading = false,
  icon,
  iconPosition = 'start',
  disabled,
  ...props
}: ButtonProps) {
  const layoutConfig = { ...defaultLayoutConfig, ...config };
  
  const baseClasses = getButtonClasses(variant as any, size);
  
  const variantClasses = {
    primary: 'bg-blue-600 hover:bg-blue-700 text-white focus:ring-blue-500 disabled:bg-blue-300',
    secondary: 'bg-gray-200 hover:bg-gray-300 text-gray-900 focus:ring-gray-500 disabled:bg-gray-100',
    danger: 'bg-red-600 hover:bg-red-700 text-white focus:ring-red-500 disabled:bg-red-300',
    outline: 'border border-gray-300 bg-white hover:bg-gray-50 text-gray-700 focus:ring-blue-500 disabled:bg-gray-50',
    ghost: 'bg-transparent hover:bg-gray-100 text-gray-700 focus:ring-gray-500 disabled:text-gray-400',
  };
  
  const fullWidthClass = fullWidth ? 'w-full' : '';
  const disabledClass = (disabled || loading) ? 'cursor-not-allowed opacity-50' : '';
  
  const iconSpacing = layoutConfig.direction === 'rtl' ? 'space-x-reverse' : '';
  const iconOrderClass = iconPosition === 'end' ? 'flex-row-reverse' : '';
  
  return (
    <button 
      className={`${baseClasses} ${variantClasses[variant]} ${fullWidthClass} ${disabledClass} ${iconSpacing} ${iconOrderClass} ${className}`}
      disabled={disabled || loading}
      dir={layoutConfig.direction}
      {...props}
    >
      {loading && (
        <svg 
          className="animate-spin -ml-1 mr-3 h-5 w-5 text-current" 
          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>
      )}
      
      {icon && iconPosition === 'start' && !loading && (
        <span className={layoutConfig.direction === 'rtl' ? 'ml-2' : 'mr-2'}>
          {icon}
        </span>
      )}
      
      <span>{children}</span>
      
      {icon && iconPosition === 'end' && !loading && (
        <span className={layoutConfig.direction === 'rtl' ? 'mr-2' : 'ml-2'}>
          {icon}
        </span>
      )}
    </button>
  );
}