import React from 'react';

type ButtonVariant = 'primary' | 'secondary' | 'success' | 'danger' | 'warning' | 'info' | 'outline' | 'link';

interface ButtonProps {
  children: React.ReactNode;
  type?: 'button' | 'submit' | 'reset';
  onClick?: (e: React.MouseEvent<HTMLButtonElement>) => void;
  variant?: ButtonVariant;
  size?: 'sm' | 'md' | 'lg';
  disabled?: boolean;
  className?: string;
  icon?: React.ReactNode;
}

export function Button({
  children,
  type = 'button',
  onClick,
  variant = 'primary',
  size = 'md',
  disabled = false,
  className = '',
  icon,
}: ButtonProps) {
  const baseClasses = 'inline-flex items-center justify-center font-medium rounded-md focus:outline-none transition-colors';
  
  // Definir classes de variante
  const variantClasses = {
    primary: 'bg-blue-600 text-white hover:bg-blue-700 focus:ring-2 focus:ring-offset-2 focus:ring-blue-500',
    secondary: 'bg-gray-600 text-white hover:bg-gray-700 focus:ring-2 focus:ring-offset-2 focus:ring-gray-500',
    success: 'bg-green-600 text-white hover:bg-green-700 focus:ring-2 focus:ring-offset-2 focus:ring-green-500',
    danger: 'bg-red-600 text-white hover:bg-red-700 focus:ring-2 focus:ring-offset-2 focus:ring-red-500',
    warning: 'bg-yellow-500 text-white hover:bg-yellow-600 focus:ring-2 focus:ring-offset-2 focus:ring-yellow-400',
    info: 'bg-blue-400 text-white hover:bg-blue-500 focus:ring-2 focus:ring-offset-2 focus:ring-blue-300',
    outline: 'bg-white text-gray-700 border border-gray-300 hover:bg-gray-50 focus:ring-2 focus:ring-offset-2 focus:ring-blue-500',
    link: 'bg-transparent text-blue-600 hover:text-blue-800 hover:underline focus:ring-0',
  };
  
  // Definir classes de tamanho
  const sizeClasses = {
    sm: 'px-2.5 py-1.5 text-xs',
    md: 'px-4 py-2 text-sm',
    lg: 'px-6 py-3 text-base',
  };
  
  // Definir classes de estado desabilitado
  const disabledClasses = 'opacity-50 cursor-not-allowed';
  
  const buttonClasses = [
    baseClasses,
    variantClasses[variant],
    sizeClasses[size],
    disabled ? disabledClasses : '',
    className,
  ].join(' ');
  
  return (
    <button
      type={type}
      onClick={onClick}
      disabled={disabled}
      className={buttonClasses}
    >
      {icon && <span className="mr-2">{icon}</span>}
      {children}
    </button>
  );
}