import { ButtonHTMLAttributes, forwardRef } from 'react';

type Variant = 'primary' | 'secondary' | 'danger' | 'ghost';

interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
  variant?: Variant;
  loading?: boolean;
}

const variantClasses: Record<Variant, string> = {
  primary: 'bg-primary text-white hover:bg-primary-hover focus:ring-primary',
  secondary: 'bg-secondary text-white hover:bg-secondary/80 focus:ring-secondary',
  danger: 'bg-error text-white hover:bg-error/80 focus:ring-error',
  ghost: 'bg-transparent text-primary hover:bg-primary/10 focus:ring-primary',
};

export const Button = forwardRef<HTMLButtonElement, ButtonProps>(
  ({ variant = 'primary', loading = false, children, className = '', disabled, ...props }, ref) => {
    return (
      <button
        ref={ref}
        className={`inline-flex items-center justify-center px-4 py-2 rounded-lg font-medium transition-colors focus:outline-none focus:ring-2 focus:ring-offset-2 disabled:opacity-50 disabled:cursor-not-allowed ${variantClasses[variant]} ${className}`}
        disabled={disabled || loading}
        {...props}
      >
        {loading ? (
          <svg className="animate-spin h-5 w-5 mr-2" 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 12h4z" />
          </svg>
        ) : null}
        {children}
      </button>
    );
  }
);
Button.displayName = 'Button';