import * as _angular_core from '@angular/core';
import { OnInit, OnDestroy, ElementRef, TemplateRef, EventEmitter } from '@angular/core';

/**
 * Configuration options for the ngx-custom-modal component.
 * @public
 */
interface ModalOptions {
    /** Close modal when clicking outside the modal content. @default true */
    closeOnOutsideClick?: boolean;
    /** Close modal when pressing the Escape key. @default true */
    closeOnEscape?: boolean;
    /** Additional CSS class to apply to the modal container */
    customClass?: string;
    /** Hide the default close button (×) in the header. @default false */
    hideCloseButton?: boolean;
    /**
     * Backdrop behavior configuration
     * - 'static': Prevents closing when clicking outside
     * - 'dynamic': Allows closing when clicking outside (if closeOnOutsideClick is true)
     * @default 'dynamic'
     */
    backdrop?: 'static' | 'dynamic';
    /** Enable keyboard interactions (Tab navigation, Escape key). @default true */
    keyboard?: boolean;
    /** Enable automatic focus management. @default true */
    focus?: boolean;
    /**
     * Modal size preset
     * - 'sm': Small (300px max-width)
     * - 'md': Medium (500px max-width)
     * - 'lg': Large (800px max-width)
     * - 'xl': Extra Large (1140px max-width)
     * @default 'md'
     */
    size?: 'sm' | 'md' | 'lg' | 'xl';
    /** Center modal vertically in viewport. @default false */
    centered?: boolean;
    /** Make modal body scrollable when content overflows. @default false */
    scrollable?: boolean;
    /** Enable CSS transition animations. @default true */
    animation?: boolean;
    /** Animation duration in milliseconds. @default 200 */
    animationDuration?: number;
}
/**
 * Button configuration for modal footers.
 * @public
 */
interface ModalButton {
    /** Unique identifier for the button */
    id: string;
    /** Display text for the button */
    text: string;
    /** CSS classes to apply to the button */
    class: string;
    /** HTML button type attribute. @default 'button' */
    type?: 'button' | 'submit' | 'reset';
    /** Click event handler function */
    handler?: () => void;
    /** Disable the button. @default false */
    disabled?: boolean;
}
/**
 * Internal state interface for modal component.
 * Used by signals for reactive state management.
 * @internal
 */
interface ModalState {
    /** Whether the modal is currently visible */
    isVisible: boolean;
    /** Whether the modal is currently animating (opening/closing) */
    isAnimating: boolean;
    /** Current z-index value for stacking */
    zIndex: number;
    /** Element that had focus before modal opened (for restoration) */
    previousFocusedElement?: HTMLElement;
}

/**
 * A feature-rich, accessible modal component for Angular 17+ applications.
 *
 * Features:
 * - Signal-based reactivity for optimal performance
 * - Advanced modal stacking with z-index management
 * - Full WCAG accessibility compliance
 * - Bootstrap 3, 4 & 5 compatibility
 * - Touch-optimized for mobile devices
 * - Customizable animations and styling
 * - Cross-version compatibility (Angular 17-20+)
 *
 * @example
 * ```html
 * <ngx-custom-modal #modal [size]="'lg'" [centered]="true">
 *   <ng-template #modalHeader>
 *     <h2>Modal Title</h2>
 *   </ng-template>
 *   <ng-template #modalBody>
 *     <p>Modal content</p>
 *   </ng-template>
 * </ngx-custom-modal>
 * ```
 *
 * @public
 */
declare class NgxCustomModalComponent implements OnInit, OnDestroy {
    private elementRef;
    private document;
    private lifecycleService;
    modalDialog: ElementRef<HTMLDialogElement>;
    /** Template reference for modal header content */
    header: TemplateRef<any> | null;
    /** Template reference for modal body content */
    body: TemplateRef<any> | null;
    /** Template reference for modal footer content */
    footer: TemplateRef<any> | null;
    /** Close modal when clicking outside the modal content. @default true */
    closeOnOutsideClick: boolean;
    /** Close modal when pressing the Escape key. @default true */
    closeOnEscape: boolean;
    /** Additional CSS class to apply to the modal container */
    customClass?: string;
    /** Hide the default close button (×) in the header. @default false */
    hideCloseButton: boolean;
    /** Configuration options object that overrides individual properties */
    options: ModalOptions;
    /** Modal size preset. @default 'md' */
    size: 'sm' | 'md' | 'lg' | 'xl';
    /** Center modal vertically in viewport. @default false */
    centered: boolean;
    /** Make modal body scrollable when content overflows. @default false */
    scrollable: boolean;
    /** Enable CSS transition animations. @default true */
    animation: boolean;
    /** Backdrop behavior configuration. @default 'dynamic' */
    backdrop: 'static' | 'dynamic';
    /** Enable keyboard interactions. @default true */
    keyboard: boolean;
    /** Enable automatic focus management. @default true */
    focus: boolean;
    /** Emitted when modal starts opening */
    opened: EventEmitter<void>;
    /** Emitted when modal is fully closed */
    closed: EventEmitter<void>;
    /** Emitted before modal starts opening */
    opening: EventEmitter<void>;
    /** Emitted before modal starts closing */
    closing: EventEmitter<void>;
    private modalState;
    private animationDuration;
    private modalStack;
    /** Computed signal for modal visibility state */
    visible: _angular_core.Signal<boolean>;
    /** Signal for animation state */
    visibleAnimate: _angular_core.WritableSignal<boolean>;
    /** Computed signal for animation state */
    isAnimating: _angular_core.Signal<boolean>;
    /** Unique ID for modal title (ARIA) */
    titleId: _angular_core.WritableSignal<string>;
    /** Unique ID for modal description (ARIA) */
    descriptionId: _angular_core.WritableSignal<string>;
    private previouslyFocusedElement;
    private modalStackService;
    private afterRenderCleanup;
    private afterNextRenderCleanup;
    constructor();
    ngOnInit(): void;
    ngOnDestroy(): void;
    /**
     * Opens the modal with proper accessibility and focus management.
     *
     * Automatically handles:
     * - Focus management (saves current focus, sets focus to modal)
     * - Body scroll locking
     * - Z-index management for stacking
     * - Screen reader announcements
     *
     * @public
     * @fires opening - Before modal animation starts
     * @fires opened - After modal is fully visible
     */
    open(): void;
    /**
     * Closes the modal and restores previous state.
     *
     * Automatically handles:
     * - Focus restoration to previously focused element
     * - Body scroll unlock (if no other modals open)
     * - Cleanup of event listeners
     *
     * @public
     * @fires closing - Before modal animation starts
     * @fires closed - After modal is fully hidden
     */
    close(): void;
    /**
     * Toggles the modal visibility state.
     * @public
     */
    toggle(): void;
    /**
     * Handles clicks on the modal container for outside click detection.
     * @param event - The mouse click event
     * @private
     */
    onContainerClicked(event: MouseEvent): void;
    /**
     * Handles global keyboard events for modal functionality.
     * @param event - The keyboard event
     * @private
     */
    onKeyDownHandler(event: KeyboardEvent): void;
    /**
     * Checks if this modal is the topmost in the stack.
     * Used for proper event handling in nested modals.
     *
     * @returns {boolean} True if this modal is on top of the stack
     * @public
     */
    isTopMost(): boolean;
    /**
     * Gets the combined custom CSS classes for the modal.
     * @returns {string} Space-separated CSS classes
     * @public
     */
    getCustomClass(): string;
    /**
     * Gets the CSS classes for the modal dialog container.
     * @returns {string} Space-separated CSS classes
     * @public
     */
    getDialogClasses(): string;
    /**
     * Determines if the close button should be hidden.
     * @returns {boolean} True if close button should be hidden
     * @public
     */
    shouldHideCloseButton(): boolean;
    /**
     * Gets the ARIA label for the close button.
     * @returns {string} Localized close button label
     * @public
     */
    getCloseButtonLabel(): string;
    /**
     * Checks if header content is available.
     * @returns {boolean} True if header template exists
     * @public
     */
    hasHeaderContent(): boolean;
    /**
     * Checks if footer content is available.
     * @returns {boolean} True if footer template exists
     * @public
     */
    hasFooterContent(): boolean;
    /**
     * Sets up lifecycle hooks with version compatibility.
     * @private
     */
    private setupLifecycleHooks;
    /**
     * Cleans up lifecycle hook subscriptions.
     * @private
     */
    private cleanupLifecycleHooks;
    /**
     * Logs version information for debugging.
     * @private
     */
    private logVersionInfo;
    /**
     * Handles modal opening side effects.
     * @private
     */
    private handleModalOpen;
    /**
     * Handles modal closing side effects.
     * @private
     */
    private handleModalClose;
    /**
     * Sets up accessibility attributes and ARIA labels.
     * @private
     */
    private setupAccessibility;
    /**
     * Sets up keyboard navigation handlers.
     * @private
     */
    private setupKeyboardNavigation;
    /**
     * Sets up focus management systems.
     * @private
     */
    private setupFocusManagement;
    /**
     * Adjusts modal position and size based on viewport.
     * @private
     */
    private adjustModalPosition;
    /**
     * Ensures proper z-index for modal stacking.
     * @private
     */
    private ensureProperZIndex;
    /**
     * Stores the currently focused element for later restoration.
     * @private
     */
    private storePreviousFocus;
    /**
     * Restores focus to the previously focused element.
     * @private
     */
    private restoreFocus;
    /**
     * Manages focus within the modal for accessibility.
     * Focuses first focusable element or close button as fallback.
     * @private
     */
    private focusFirstElement;
    /**
     * Handles tab key navigation to trap focus within the modal.
     * Implements circular focus trapping as per WCAG guidelines.
     * @param event - The keyboard event
     * @private
     */
    private handleTabKey;
    /**
     * Adds modal-open class to body to prevent scrolling.
     * @private
     */
    private addBodyClass;
    /**
     * Removes modal-open class from body when no modals are open.
     * @private
     */
    private removeBodyClass;
    /**
     * Gets the CSS class for modal size.
     * @returns {string} Size-specific CSS class
     * @private
     */
    private getSizeClass;
    /**
     * Gets the CSS class for animation state.
     * @returns {string} Animation-specific CSS class
     * @private
     */
    private getAnimationClass;
    /**
     * Updates CSS custom property for animation duration.
     * @param duration - Animation duration in milliseconds
     * @private
     */
    private updateCSSAnimationDuration;
    /**
     * Registers this modal instance with the modal stack service.
     * @private
     */
    private registerInModalStack;
    /**
     * Unregisters this modal instance from the modal stack service.
     * @private
     */
    private unregisterFromModalStack;
    /**
     * Announces messages to screen readers for accessibility.
     * @param message - Message to announce
     * @private
     */
    private announceToScreenReader;
    static ɵfac: _angular_core.ɵɵFactoryDeclaration<NgxCustomModalComponent, never>;
    static ɵcmp: _angular_core.ɵɵComponentDeclaration<NgxCustomModalComponent, "ngx-custom-modal", never, { "closeOnOutsideClick": { "alias": "closeOnOutsideClick"; "required": false; }; "closeOnEscape": { "alias": "closeOnEscape"; "required": false; }; "customClass": { "alias": "customClass"; "required": false; }; "hideCloseButton": { "alias": "hideCloseButton"; "required": false; }; "options": { "alias": "options"; "required": false; }; "size": { "alias": "size"; "required": false; }; "centered": { "alias": "centered"; "required": false; }; "scrollable": { "alias": "scrollable"; "required": false; }; "animation": { "alias": "animation"; "required": false; }; "backdrop": { "alias": "backdrop"; "required": false; }; "keyboard": { "alias": "keyboard"; "required": false; }; "focus": { "alias": "focus"; "required": false; }; }, { "opened": "opened"; "closed": "closed"; "opening": "opening"; "closing": "closing"; }, ["header", "body", "footer"], never, true, never>;
}

/**
 * Service for managing multiple modal instances and their stacking order.
 *
 * Handles:
 * - Z-index calculation for proper stacking
 * - Modal registration/unregistration
 * - Top-most modal identification
 * - Body class management
 *
 * @injectable
 * @public
 */
declare class NgxModalStackService {
    private modals;
    private baseZIndex;
    /**
     * Registers a modal instance with the stack service.
     * @param modal - The modal component to register
     * @public
     */
    register(modal: NgxCustomModalComponent): void;
    /**
     * Unregisters a modal instance from the stack service.
     * @param modal - The modal component to unregister
     * @public
     */
    unregister(modal: NgxCustomModalComponent): void;
    /**
     * Determines if the given modal is the topmost visible modal.
     * Used for proper event handling and accessibility.
     * @param modal - The modal instance to check
     * @returns {boolean} True if the modal is topmost
     * @public
     */
    isTopMost(modal: NgxCustomModalComponent): boolean;
    /**
     * Calculates the next z-index value for a new modal.
     * Each modal gets a z-index 10 units higher than the previous.
     * @returns {number} The z-index value to use
     * @public
     */
    getNextZIndex(): number;
    /**
     * Gets the count of currently active (visible) modals.
     * @returns {number} Number of active modals
     * @public
     */
    getActiveModalsCount(): number;
    static ɵfac: _angular_core.ɵɵFactoryDeclaration<NgxModalStackService, never>;
    static ɵprov: _angular_core.ɵɵInjectableDeclaration<NgxModalStackService>;
}

export { NgxCustomModalComponent, NgxModalStackService };
export type { ModalButton, ModalOptions, ModalState };