import React, { ReactNode, MouseEventHandler, ButtonHTMLAttributes } from 'react';
import { Stack } from './Stack';

interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
  children: ReactNode;
  onClick?: MouseEventHandler<HTMLButtonElement>;
  className?: string;
  variant?: 'primary' | 'secondary' | 'danger' | 'ghost' | 'race-performance' | 'race-final';
  size?: 'sm' | 'md' | 'lg';
  disabled?: boolean;
  type?: 'button' | 'submit' | 'reset';
  icon?: ReactNode;
  fullWidth?: boolean;
  as?: 'button' | 'a';
  href?: string;
}

export function Button({ 
  children, 
  onClick, 
  className = '',
  variant = 'primary',
  size = 'md',
  disabled = false,
  type = 'button',
  icon,
  fullWidth = false,
  as = 'button',
  href,
  ...props
}: ButtonProps) {
  const baseClasses = 'inline-flex items-center rounded-lg transition-all duration-75 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 hover:scale-[1.02] active:scale-95';
  
  const variantClasses = {
    primary: 'bg-primary-blue text-white hover:bg-primary-blue/80 focus-visible:outline-primary-blue shadow-[0_0_15px_rgba(25,140,255,0.4)]',
    secondary: 'bg-iron-gray text-white border border-charcoal-outline hover:bg-iron-gray/80 focus-visible:outline-primary-blue',
    danger: 'bg-red-600 text-white hover:bg-red-700 focus-visible:outline-red-600',
    ghost: 'bg-transparent text-gray-400 hover:bg-gray-800 focus-visible:outline-gray-400',
    'race-performance': 'bg-gradient-to-r from-yellow-400 to-orange-500 text-white shadow-[0_0_15px_rgba(251,191,36,0.4)] hover:from-yellow-500 hover:to-orange-600 focus-visible:outline-yellow-400',
    'race-final': 'bg-gradient-to-r from-purple-400 to-pink-500 text-white shadow-[0_0_15px_rgba(168,85,247,0.4)] hover:from-purple-500 hover:to-pink-600 focus-visible:outline-purple-400'
  };
  
  const sizeClasses = {
    sm: 'min-h-[36px] px-3 py-1.5 text-xs',
    md: 'min-h-[44px] px-4 py-2 text-sm',
    lg: 'min-h-[52px] px-6 py-3 text-base'
  };
  
  const disabledClasses = disabled ? 'opacity-50 cursor-not-allowed' : 'cursor-pointer';
  const widthClasses = fullWidth ? 'w-full' : '';
  
  const classes = [
    baseClasses,
    variantClasses[variant],
    sizeClasses[size],
    disabledClasses,
    widthClasses,
    className
  ].filter(Boolean).join(' ');
  
  const content = icon ? (
    <Stack direction="row" align="center" gap={2} center={fullWidth}>
      {icon}
      {children}
    </Stack>
  ) : children;

  if (as === 'a') {
    return (
      <a 
        href={href}
        className={classes}
        {...(props as React.AnchorHTMLAttributes<HTMLAnchorElement>)}
      >
        {content}
      </a>
    );
  }

  return (
    <button 
      type={type}
      className={classes}
      onClick={onClick}
      disabled={disabled}
      {...props}
    >
      {content}
    </button>
  );
}