/**
 * useInputGuard Hook
 *
 * Validates keyboard input against the current UI state.
 * Provides centralized input validation with debug logging support.
 */
import { type Key, type StateContext, type UIState } from '../state/index.js';
/**
 * Options for the useInputGuard hook
 */
export interface UseInputGuardOptions {
    /** Current UI state context */
    context: StateContext;
    /** Callback when input is rejected */
    onInvalidInput?: (keyId: string, state: UIState, reason: string) => void;
    /** Callback when input is throttled */
    onThrottled?: (keyId: string, action: string) => void;
}
/**
 * Return type for useInputGuard hook
 */
export interface UseInputGuardResult {
    /**
     * Validate an input against the current state.
     * Returns true if the input should be processed.
     */
    validateInput: (input: string, key: Key) => boolean;
    /**
     * Check if a specific key ID is valid for the current state.
     * Useful for checking before dispatching an action.
     */
    isKeyValid: (keyId: string) => boolean;
    /**
     * Get the normalized key identifier for an input.
     */
    getKeyId: (input: string, key: Key) => string;
    /**
     * Current UI state (convenience accessor)
     */
    currentState: UIState;
}
/**
 * Hook that provides input validation against the current UI state
 *
 * @param options - Configuration options
 * @returns Validation functions and state info
 *
 * @example
 * const { validateInput, currentState } = useInputGuard({ context });
 *
 * useInput((input, key) => {
 *   // Skip invalid inputs
 *   if (!validateInput(input, key)) return;
 *
 *   // Process valid input
 *   if (input === 'r') {
 *     refresh();
 *   }
 * });
 */
export declare function useInputGuard(options: UseInputGuardOptions): UseInputGuardResult;
/**
 * Simple validation function (non-hook) for use outside React components
 *
 * @param input - Input character
 * @param key - Key object from useInput
 * @param state - Current UI state
 * @returns Whether the input is valid
 */
export declare function validateInputForState(input: string, key: Key, state: UIState): boolean;
/**
 * Check if input should trigger special handling in a state
 *
 * Some states have special behavior:
 * - 'help' and 'config': any key closes them
 * - 'command-palette': any printable char is valid for typing
 * - 'login-dialog': text input for form fields
 */
export declare function hasSpecialInputHandling(state: UIState): boolean;
/**
 * Get the appropriate action for an escape key press
 *
 * @param state - Current UI state
 * @param canCancel - Whether the current operation can be cancelled
 * @returns The action to take, or null if escape should be ignored
 */
export declare function getEscapeAction(state: UIState, canCancel?: boolean): 'close' | 'cancel' | 'ignore' | null;
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