/**
 * @license
 * Copyright 2023 Nuraly, Laabidi Aymen
 * SPDX-License-Identifier: MIT
 */
import { ReactiveControllerHost } from 'lit';
import { BaseComponentController, BaseHost } from './base.controller.js';
/**
 * Shared validation rule interface (matches src/shared/validation.types.ts)
 */
export interface SharedValidationRule {
    /** Validation function that returns true if valid */
    validator: (value: any) => boolean | Promise<boolean>;
    /** Error/warning message to display if validation fails */
    message: string;
    /** Validation level */
    level?: 'error' | 'warning';
    /** Whether this rule should block form submission */
    blocking?: boolean;
}
/**
 * Abstract base validation controller that provides shared validation
 * state management, form integration, and event dispatching.
 *
 * Used by input, textarea, select, and radio-group validation controllers
 * to avoid duplicating common validation patterns.
 *
 * @typeParam THost - The component host type
 */
export declare abstract class BaseValidationController<THost extends BaseHost & ReactiveControllerHost> extends BaseComponentController<THost> {
    protected _isValid: boolean;
    protected _validationMessage: string;
    protected _validationState: string;
    protected _rules: SharedValidationRule[];
    /**
     * Whether the current value is valid
     */
    get isValid(): boolean;
    /**
     * Current validation message
     */
    get validationMessage(): string;
    /**
     * Current validation state (e.g., 'pristine', 'valid', 'invalid', 'warning', 'pending')
     */
    get validationState(): string;
    /**
     * Add a validation rule
     */
    addRule(rule: SharedValidationRule): void;
    /**
     * Remove validation rules matching the predicate
     */
    removeRule(predicate: (rule: SharedValidationRule) => boolean): void;
    /**
     * Clear all validation rules
     */
    clearRules(): void;
    /**
     * Clear validation state back to pristine
     */
    clearValidation(): void;
    /**
     * HTML5 constraint validation API - check validity
     */
    checkValidity(): boolean;
    /**
     * HTML5 constraint validation API - report validity
     */
    reportValidity(): boolean;
    /**
     * Dispatch a standardized 'nr-validation' event from the host
     */
    protected dispatchValidationEvent(): void;
    /**
     * Component-specific validation logic.
     * Subclasses must implement this with their own validation.
     */
    abstract validate(): Promise<boolean> | boolean;
}
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