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 default function Button({
  variant = 'primary',
  size = 'md',
  isLoading = false,
  children,
  className,
  disabled,
  ...props
}: ButtonProps) {
  const baseStyles = 'inline-flex items-center justify-center font-medium rounded-lg transition-colors focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-offset-dark-700 disabled:opacity-50 disabled:cursor-not-allowed'

  const variants = {
    primary: 'bg-primary-500 text-white hover:bg-primary-600 focus:ring-primary-500',
    secondary: 'bg-dark-900 text-white hover:bg-dark-800 focus:ring-dark-500',
    danger: 'bg-red-600 text-white hover:bg-red-700 focus:ring-red-500',
    ghost: 'text-dark-300 hover:text-white hover:bg-dark-900/50 focus:ring-dark-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"
            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>
          Loading...
        </>
      ) : (
        children
      )}
    </button>
  )
}
