import React, { forwardRef, useState } from 'react';

import { clsx } from 'clsx';

export interface AlertProps extends React.HTMLAttributes<HTMLDivElement> {
  variant?: 'success' | 'warning' | 'error' | 'info' | 'neutral';
  title?: string;
  dismissible?: boolean;
  onDismiss?: () => void;
  icon?: React.ReactNode;
  actions?: React.ReactNode;
  children: React.ReactNode;
}

const Alert = forwardRef<HTMLDivElement, AlertProps>(
  ({ 
    variant = 'info',
    title,
    dismissible = false,
    onDismiss,
    icon,
    actions,
    children,
    className,
    ...props 
  }, ref) => {
    const [isVisible, setIsVisible] = useState(true);

    const handleDismiss = () => {
      setIsVisible(false);
      onDismiss?.();
    };

    if (!isVisible) {return null;}

    // Default icons for each variant
    const defaultIcons = {
      success: (
        <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
          <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clipRule="evenodd" />
        </svg>
      ),
      warning: (
        <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
          <path fillRule="evenodd" d="M8.257 3.099c.765-1.36 2.722-1.36 3.486 0l5.58 9.92c.75 1.334-.213 2.98-1.742 2.98H4.42c-1.53 0-2.493-1.646-1.743-2.98l5.58-9.92zM11 13a1 1 0 11-2 0 1 1 0 012 0zm-1-8a1 1 0 00-1 1v3a1 1 0 002 0V6a1 1 0 00-1-1z" clipRule="evenodd" />
        </svg>
      ),
      error: (
        <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
          <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
        </svg>
      ),
      info: (
        <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
          <path fillRule="evenodd" d="M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7-4a1 1 0 11-2 0 1 1 0 012 0zM9 9a1 1 0 000 2v3a1 1 0 001 1h1a1 1 0 100-2v-3a1 1 0 00-1-1H9z" clipRule="evenodd" />
        </svg>
      ),
      neutral: (
        <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
          <path fillRule="evenodd" d="M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7-4a1 1 0 11-2 0 1 1 0 012 0zM9 9a1 1 0 000 2v3a1 1 0 001 1h1a1 1 0 100-2v-3a1 1 0 00-1-1H9z" clipRule="evenodd" />
        </svg>
      ),
    };

    const alertStyles = clsx(
      // Base styles
      'relative p-lg rounded-lg border backdrop-blur-md',
      'transition-all duration-200 ease-in-out',
      
      // Variant styles
      {
        'bg-success-bg text-success-text border-success-border': variant === 'success',
        'bg-warning-bg text-warning-text border-warning-border': variant === 'warning',
        'bg-error-bg text-error-text border-error-border': variant === 'error',
        'bg-info-bg text-info-text border-info-border': variant === 'info',
        'bg-glass-bg text-text-primary border-glass-border': variant === 'neutral',
      },
      
      className
    );

    const iconColor = {
      success: 'text-success-accent',
      warning: 'text-warning-accent',
      error: 'text-error-accent',
      info: 'text-info-accent',
      neutral: 'text-text-muted',
    };

    const displayIcon = icon ?? defaultIcons[variant];

    return (
      <div
        ref={ref}
        role="alert"
        className={alertStyles}
        {...props}
      >
        <div className="flex">
          {displayIcon && (
            <div className={clsx('flex-shrink-0 mr-md', iconColor[variant])}>
              {displayIcon}
            </div>
          )}
          
          <div className="flex-1 min-w-0">
            {title && (
              <h3 className="text-sm font-semibold mb-xs">
                {title}
              </h3>
            )}
            
            <div className="text-sm">
              {children}
            </div>
            
            {actions && (
              <div className="mt-md">
                {actions}
              </div>
            )}
          </div>
          
          {dismissible && (
            <div className="flex-shrink-0 ml-md">
              <button
                type="button"
                className={clsx(
                  'inline-flex rounded-md p-xs transition-colors duration-150',
                  'hover:bg-black/10 focus:bg-black/10 focus:outline-none',
                  iconColor[variant]
                )}
                onClick={handleDismiss}
                aria-label="Dismiss alert"
              >
                <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
                  <path fillRule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clipRule="evenodd" />
                </svg>
              </button>
            </div>
          )}
        </div>
      </div>
    );
  }
);

Alert.displayName = 'Alert';

export { Alert };