import { ButtonHTMLAttributes, forwardRef } from 'react';

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

export const Button = forwardRef<HTMLButtonElement, ButtonProps>(
  ({ className = '', variant = 'primary', size = 'md', isLoading, children, disabled, ...props }, ref) => {
    const baseStyles = 'inline-flex items-center justify-center font-medium rounded-lg transition-colors focus:outline-none focus:ring-2 focus:ring-offset-2 disabled:opacity-50 disabled:cursor-not-allowed';

    const variants = {
      primary: 'bg-primary text-white hover:bg-blue-700 focus:ring-blue-500',
      secondary: 'bg-secondary text-white hover:bg-violet-700 focus:ring-violet-500',
      outline: 'border-2 border-primary text-primary hover:bg-primary hover:text-white focus:ring-primary',
      ghost: 'text-gray-600 hover:bg-gray-100 focus:ring-gray-500',
    };

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

    return (
      <button
        ref={ref}
        className={`${baseStyles} ${variants[variant]} ${sizes[size]} ${className}`}
        disabled={disabled || isLoading}
        {...props}
      >
        {isLoading && (
          <svg className="animate-spin -ml-1 mr-2 h-4 w-4" 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>
        )}
        {children}
      </button>
    );
  }
);

Button.displayName = 'Button';
