import { type Accessor, createContext, useContext } from "solid-js";

export type TextDirection = "ltr" | "rtl";

/**
 * Default context value — resolves to `"ltr"` when no `<DirectionProvider>`
 * wraps the consumer.
 */
const DEFAULT_DIRECTION: Accessor<TextDirection> = () => "ltr";

/**
 * Context carrying the current text direction as an `Accessor`. Provided via
 * Solid 2's context-as-provider pattern:
 * `<DirectionContext value={() => direction}>`.
 *
 * @internal
 */
export const DirectionContext =
	createContext<Accessor<TextDirection>>(DEFAULT_DIRECTION);

/**
 * Read the current text direction. Returns an `Accessor<TextDirection>` so
 * consumers stay reactive; call it (e.g. `useDirection()()`) to get the
 * current value. Defaults to `"ltr"` when no provider is mounted.
 */
export function useDirection(): Accessor<TextDirection> {
	return useContext(DirectionContext);
}