import { FormData, FormErrors } from '../../types/common/FormData.type';
import { FormTouched } from '../../types/common/FormTouched.type';
export type FocusableField = 'email' | 'phoneNumber' | 'cardNumber' | 'cardExpiry' | 'cardCvv' | 'name';
export interface Focusable {
    focus: () => void;
}
/**
 * FocusManager handles the auto-focus progression feature
 * It tracks field focus and validity to determine when to
 * automatically move focus to the next field in sequence
 */
export declare class FocusManager {
    private focusSequence;
    private currentFocusIndex;
    private fields;
    private fieldValidState;
    private previousFieldValidState;
    /**
     * Register a field with the focus manager
     */
    registerField(fieldName: FocusableField, field: Focusable): void;
    /**
     * Handle field focus events
     */
    handleFieldFocus(fieldName: FocusableField): void;
    /**
     * Update the validation state of fields based on form state
     */
    handleStateUpdate(formData: Partial<FormData>, errors: FormErrors, touched: Partial<FormTouched>): void;
    /**
     * Check if any fields have transitioned from invalid to valid and progress focus if needed
     */
    private checkForValidTransitions;
    /**
     * Focus the next field in sequence
     */
    private focusNextField;
    /**
     * Focus a specific field by its index in the sequence
     */
    focusFieldByIndex(index: number): void;
    /**
     * Apply focus to the current field based on focus index
     */
    private applyFocusToCurrentField;
    /**
     * Focus the card number field (first field)
     * Used for setting initial focus on page load
     */
    focusCardNumberField(): void;
    /**
     * Focus a specific field by name
     * Used for manual focus control (e.g., Tab key navigation)
     */
    focusField(fieldName: FocusableField): void;
}
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