import { useState } from 'react';

/**
 * A custom hook for managing both controlled and uncontrolled component states.
 *
 * This hook allows a component to support both controlled and uncontrolled
 * states by determining whether the `controlledValue` is provided. If it is
 * undefined, the hook falls back to using the internal state.
 *
 * @example
 *   // Uncontrolled usage
 *   const [value, setValue] = useControlledValue(0, undefined);
 *
 *   // Controlled usage
 *   const [value, setValue] = useControlledValue(0, props.value);
 *
 * @template T - The type of the value.
 * @param defaultValue The initial value for the uncontrolled state.
 * @param controlledValue The value for the controlled state. If undefined, the
 *   component will use the uncontrolled state.
 * @returns A tuple where the first element is the current value (either
 *   controlled or uncontrolled) and the second element is a setter function to
 *   update the value.
 */
function useControlledValue(defaultValue, controlledValue) {
    const [uncontrolledValue, setValue] = useState(defaultValue);
    const value = controlledValue === undefined ? uncontrolledValue : controlledValue;
    return [value, setValue];
}

export { useControlledValue };
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