import { forwardRef } from 'react';

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

const variantStyles: Record<string, string> = {
  primary: 'bg-primary-600 text-white shadow-sm hover:bg-primary-700 focus:ring-primary-500/50',
  secondary: 'bg-white dark:bg-surface-800 text-surface-700 dark:text-surface-200 border border-surface-200 dark:border-surface-600 hover:bg-surface-50 dark:hover:bg-surface-700 focus:ring-surface-300/50',
  danger: 'bg-red-600 text-white shadow-sm hover:bg-red-700 focus:ring-red-500/50',
  ghost: 'text-surface-500 dark:text-surface-400 hover:text-surface-800 dark:hover:text-surface-200 hover:bg-surface-50 dark:hover:bg-surface-700',
};

const sizeStyles: Record<string, string> = {
  sm: 'px-3 py-1.5 text-xs',
  md: 'px-4 py-2 text-sm',
};

export const Button = forwardRef<HTMLButtonElement, ButtonProps>(
  ({ variant = 'primary', size = 'md', loading, children, disabled, className = '', ...props }, ref) => {
    return (
      <button
        ref={ref}
        disabled={disabled || loading}
        className={`inline-flex items-center justify-center gap-2 font-medium rounded-lg transition-all duration-200 cursor-pointer disabled:opacity-50 disabled:cursor-not-allowed focus:outline-none focus:ring-2 focus:ring-offset-2 ${variantStyles[variant]} ${sizeStyles[size]} ${className}`}
        {...props}
      >
        {loading && (
          <svg className="animate-spin h-3.5 w-3.5" viewBox="0 0 24 24" fill="none" aria-hidden="true">
            <circle cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="3" className="opacity-25" />
            <path d="M4 12a8 8 0 018-8" stroke="currentColor" strokeWidth="3" strokeLinecap="round" />
          </svg>
        )}
        {children}
      </button>
    );
  },
);

Button.displayName = 'Button';