import type { Edge } from 'edge.js';
import type { HttpContext } from '@adonisjs/core/http';
import type { ShieldConfig } from './types.ts';
import { type Encryption } from '@adonisjs/core/encryption';
/**
 * Module augmentation for AdonisJS HTTP core types.
 * Extends Request and Response interfaces with Shield-specific properties.
 */
declare module '@adonisjs/core/http' {
    /**
     * Extended Request interface with CSRF token support.
     */
    interface HttpRequest {
        /**
         * The CSRF token for the current request.
         * Generated and attached by the CSRF guard for use in forms and AJAX requests.
         *
         * @example
         * // In a controller
         * const token = ctx.request.csrfToken
         *
         * // In a template
         * <input type="hidden" name="_csrf" value="{{ csrfToken }}">
         */
        csrfToken: string;
    }
    /**
     * Extended Response interface with CSP nonce support.
     */
    interface HttpResponse {
        /**
         * A cryptographically secure random nonce for Content Security Policy.
         * Used to allow specific inline scripts and styles while maintaining CSP security.
         *
         * @example
         * // In a template
         * <script nonce="{{ cspNonce }}">console.log('Safe inline script')</script>
         */
        nonce: string;
    }
}
/**
 * Module augmentation for Node.js HTTP ServerResponse.
 * Extends the native ServerResponse interface to include the nonce property
 * required by the helmet-csp middleware for CSP nonce generation.
 */
declare module 'node:http' {
    /**
     * Extended ServerResponse interface with CSP nonce support.
     */
    interface ServerResponse {
        /**
         * A cryptographically secure random nonce for Content Security Policy.
         * This property is set by the CSP guard and consumed by the helmet-csp middleware.
         *
         * @example
         * // Set by Shield's CSP guard
         * response.nonce = generateRandomNonce()
         */
        nonce: string;
    }
}
/**
 * Shield middleware to protect web applications against common web attacks.
 * Applies multiple security guards including CSRF, CSP, HSTS, frame guard, and content type sniffing protection.
 *
 * @example
 * const middleware = new ShieldMiddleware(config, encryption, edge)
 * router.use(middleware.handle.bind(middleware))
 */
export default class ShieldMiddleware {
    #private;
    /**
     * Creates a new ShieldMiddleware instance with the provided configuration.
     *
     * @param config - Shield configuration object
     * @param encryption - Encryption service for CSRF tokens
     * @param edge - Optional Edge template engine instance
     */
    constructor(config: ShieldConfig, encryption: Encryption, edge?: Edge);
    /**
     * Handle incoming HTTP request by applying all configured security guards.
     *
     * @param ctx - HTTP context object
     * @param next - Next middleware function in the chain
     */
    handle(ctx: HttpContext, next: () => Promise<void>): Promise<void>;
}