/**
 * Utility function to cycle through tri-state values: null -> true -> false -> null
 * @param currentValue - The current boolean or null value
 * @returns The next value in the tri-state cycle
 */
declare function cycleTriState(currentValue: boolean | null): boolean | null;
/**
 * Type definition for Angular FormControl with tri-state boolean values
 */
interface TriStateFormControl {
    value: boolean | null;
    setValue(value: boolean | null): void;
}
/**
 * Universal tri-state function that can cycle values or update FormControls
 * @param input - Either a FormControl to update or a boolean/null value to cycle
 * @returns If input is a value, returns the next tri-state value. If input is FormControl, updates it and returns void.
 *
 * @example
 *   ```typescript
 *   onTriStateChange(control: any): void {
 *     turnToTriState(control);
 *   }
 *   ```
 *
 *   ```html
 *   <p-checkbox
 *     [value]="form.controls.isActive.value"
 *     inputId="isActive"
 *     name="isActive"
 *     [indeterminate]="form.controls.isActive.value === null"
 *     [binary]="true"
 *     (onChange)="onTriStateChange(form.controls.isActive)" />
 *   ```
 */
declare function turnToTriState<T extends TriStateFormControl | boolean | null>(input: T): T extends TriStateFormControl ? void : boolean | null;
/**
 * Returns the display state for PrimeNG tri-state checkbox
 * @param value - The current tri-state value
 * @returns Object with value and indeterminate properties for PrimeNG p-checkbox
 */
declare function getPrimeNGTriStateProps(value: boolean | null): {
    value: boolean | null;
    indeterminate: boolean;
    binary: boolean;
};
/**
 * Returns the display state for tri-state checkbox
 * @param value - The current tri-state value
 * @returns Object with checked and indeterminate properties
 */
declare function getTriStateDisplay(value: boolean | null): {
    checked: boolean;
    indeterminate: boolean;
};
/**
 * Converts a tri-state value to a string representation
 * @param value - The tri-state value
 * @returns String representation of the state
 */
declare function triStateToString(value: boolean | null): 'true' | 'false' | 'null';
/**
 * Parses a string to tri-state value
 * @param value - String representation of tri-state
 * @returns The tri-state boolean value
 */
declare function stringToTriState(value: string): boolean | null;
/**
 * Gets Tailwind CSS classes for tri-state visual feedback
 * @param value - The current tri-state value
 * @param customClasses - Optional custom classes for each state
 * @returns CSS classes string
 */
declare function getTriStateTailwindClasses(value: boolean | null, customClasses?: {
    null?: string;
    true?: string;
    false?: string;
}): string;
/**
 * Returns an icon class name based on tri-state value (for use with PrimeNG icons)
 * @param value - The current tri-state value
 * @param iconSet - Icon set to use ('pi' for PrimeIcons, 'fa' for FontAwesome)
 * @returns Icon class string
 */
declare function getTriStateIcon(value: boolean | null, iconSet?: 'pi' | 'fa'): string;

/**
 * PrimeNG-specific tri-state checkbox utilities
 */
/**
 * Event handler for PrimeNG p-checkbox onChange event
 * @param event - The PrimeNG checkbox change event
 * @param formControl - The FormControl to update
 */
declare function handlePrimeNGTriStateChange(event: any, formControl: TriStateFormControl): void;
/**
 * Returns PrimeNG template configuration for tri-state checkbox
 * @param value - Current tri-state value
 * @param inputId - HTML input ID
 * @param name - Input name attribute
 * @returns Configuration object for PrimeNG p-checkbox
 */
declare function getPrimeNGTriStateConfig(value: boolean | null, inputId: string, name: string): {
    value: boolean | null;
    inputId: string;
    name: string;
    indeterminate: boolean;
    binary: boolean;
};
/**
 * Returns the label text based on tri-state value
 * @param value - Current tri-state value
 * @param labels - Custom labels for each state
 * @returns Label text
 */
declare function getTriStateLabel(value: boolean | null, labels?: {
    null?: string;
    true?: string;
    false?: string;
}): string;
/**
 * Generates a complete PrimeNG checkbox template string
 * @param fieldName - Form control field name
 * @param config - Configuration options
 * @returns HTML template string for PrimeNG checkbox
 */
declare function generatePrimeNGTriStateTemplate(fieldName: string, config?: {
    label?: string;
    inputId?: string;
    name?: string;
    containerClasses?: string;
    labelClasses?: string;
}): string;

export { type TriStateFormControl, cycleTriState, turnToTriState as default, generatePrimeNGTriStateTemplate, getPrimeNGTriStateConfig, getPrimeNGTriStateProps, getTriStateDisplay, getTriStateIcon, getTriStateLabel, getTriStateTailwindClasses, handlePrimeNGTriStateChange, stringToTriState, triStateToString, turnToTriState };