import React from 'react';
import Link from 'next/link';
import { clsx, type ClassValue } from 'clsx';
import { twMerge } from 'tailwind-merge';

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs));
}

interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement> {
  variant?: 'primary' | 'secondary' | 'outline' | 'ghost';
  size?: 'sm' | 'md' | 'lg';
  href?: string;
  className?: string;
  children?: React.ReactNode;
}

export function Button({ className, variant = 'primary', size = 'md', href, ...props }: ButtonProps) {
  const baseStyles = 'inline-flex items-center justify-center rounded-md font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary focus-visible:ring-offset-2 disabled:opacity-50 disabled:pointer-events-none';
  
  const variants = {
    primary: 'bg-primary text-white hover:bg-primary-dark',
    secondary: 'bg-secondary text-white hover:bg-secondary-light',
    outline: 'border border-neutral-dark bg-transparent hover:bg-neutral-light text-text-primary',
    ghost: 'hover:bg-neutral-light text-text-primary',
  };

  const sizes = {
    sm: 'h-9 px-3 text-sm',
    md: 'h-10 px-4 py-2',
    lg: 'h-11 px-8 text-lg',
  };

  const styles = cn(baseStyles, variants[variant], sizes[size], className);

  if (href) {
    return (
      <Link href={href} className={styles}>
        {props.children}
      </Link>
    );
  }

  return (
    <button className={styles} {...props} />
  );
}

export function Section({ className, children, ...props }: React.HTMLAttributes<HTMLElement>) {
  return (
    <section className={cn('py-12 md:py-16 lg:py-24', className)} {...props}>
      {children}
    </section>
  );
}

export function Container({ className, children, ...props }: React.HTMLAttributes<HTMLDivElement>) {
  return (
    <div className={cn('container mx-auto px-4 md:px-6', className)} {...props}>
      {children}
    </div>
  );
}

export function Card({ className, children, ...props }: React.HTMLAttributes<HTMLDivElement>) {
  return (
    <div className={cn('bg-white rounded-lg border border-neutral-dark shadow-sm overflow-hidden', className)} {...props}>
      {children}
    </div>
  );
}
