import React from 'react';
import { componentStyles, mergeClasses } from '@/lib/styles/designSystem';

interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement> {
  variant?: 'primary' | 'discord' | 'auth' | 'secondary';
  size?: 'sm' | 'md' | 'lg';
  fullWidth?: boolean;
  leftIcon?: React.ReactNode;
  rightIcon?: React.ReactNode;
  loading?: boolean;
  children: React.ReactNode;
}

const sizeClasses = {
  sm: 'px-3 py-1.5 text-sm',
  md: 'px-4 lg:px-6 py-2.5 lg:py-3 text-sm lg:text-base',
  lg: 'px-6 py-3 text-base lg:text-lg',
};

const variantClasses = {
  primary: 'bg-gradient-to-r from-banquise-blue to-banquise-blue-light hover:shadow-banquise-blue/25',
  discord: 'bg-gradient-to-r from-indigo-600 to-purple-600 hover:from-indigo-500 hover:to-purple-500 hover:shadow-indigo-500/25',
  auth: 'bg-gradient-to-r from-banquise-blue-light to-banquise-blue hover:shadow-banquise-blue-light/25',
  secondary: 'bg-white/10 hover:bg-white/20 border border-white/20',
};

export const Button: React.FC<ButtonProps> = ({
  variant = 'primary',
  size = 'md',
  fullWidth = false,
  leftIcon,
  rightIcon,
  loading = false,
  children,
  className = '',
  disabled,
  ...props
}) => {
  const baseClasses = mergeClasses(
    componentStyles.button.base,
    sizeClasses[size],
    variantClasses[variant],
    fullWidth ? 'w-full' : '',
    (disabled || loading) ? 'opacity-50 cursor-not-allowed' : '',
    className
  );

  return (
    <button
      className={baseClasses}
      disabled={disabled || loading}
      {...props}
    >
      {loading && (
        <svg className="animate-spin -ml-1 mr-2 h-4 w-4 text-white" 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>
      )}
      {leftIcon && !loading && <span className="mr-2">{leftIcon}</span>}
      {children}
      {rightIcon && !loading && <span className="ml-2">{rightIcon}</span>}
    </button>
  );
};
