import { ButtonHTMLAttributes, ReactNode } from 'react'
import { clsx } from 'clsx'

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

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

  const variants = {
    primary: 'bg-blue-600 text-white hover:bg-blue-700 focus:ring-blue-500',
    secondary: 'bg-gray-700 text-white hover:bg-gray-600 focus:ring-gray-500',
    danger: 'bg-red-600 text-white hover:bg-red-700 focus:ring-red-500',
    ghost: 'text-gray-400 hover:text-white hover:bg-gray-800 focus:ring-gray-500',
  }

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

  return (
    <button
      className={clsx(
        baseStyles,
        variants[variant],
        sizes[size],
        className
      )}
      disabled={disabled || isLoading}
      {...props}
    >
      {isLoading && (
        <svg className="animate-spin -ml-1 mr-2 h-4 w-4 text-current" 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"></circle>
          <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
        </svg>
      )}
      {children}
    </button>
  )
}
