/**
 * Keyboard constants, direction helpers, and a small attribute name used by the
 * composite primitives.
 *
 * Mirrors `packages/react/src/internals/composite/composite.ts` +
 * `constants.ts` in Base UI React, adapted to Solid. Keep the naming identical
 * so downstream consumers can port keyboard-handling logic straight across.
 */

export const ARROW_UP = "ArrowUp";
export const ARROW_DOWN = "ArrowDown";
export const ARROW_LEFT = "ArrowLeft";
export const ARROW_RIGHT = "ArrowRight";
export const HOME = "Home";
export const END = "End";

export const HORIZONTAL_KEYS = new Set<string>([ARROW_LEFT, ARROW_RIGHT]);
export const HORIZONTAL_KEYS_WITH_EXTRA_KEYS = new Set<string>([
	ARROW_LEFT,
	ARROW_RIGHT,
	HOME,
	END,
]);
export const VERTICAL_KEYS = new Set<string>([ARROW_UP, ARROW_DOWN]);
export const VERTICAL_KEYS_WITH_EXTRA_KEYS = new Set<string>([
	ARROW_UP,
	ARROW_DOWN,
	HOME,
	END,
]);
export const ARROW_KEYS = new Set<string>([
	ARROW_UP,
	ARROW_DOWN,
	ARROW_LEFT,
	ARROW_RIGHT,
]);
export const ALL_KEYS = new Set<string>([
	ARROW_UP,
	ARROW_DOWN,
	ARROW_LEFT,
	ARROW_RIGHT,
	HOME,
	END,
]);

const SHIFT = "Shift" as const;
const CONTROL = "Control" as const;
const ALT = "Alt" as const;
const META = "Meta" as const;

export const MODIFIER_KEYS = new Set([SHIFT, CONTROL, ALT, META] as const);
export type ModifierKey =
	typeof MODIFIER_KEYS extends Set<infer Keys> ? Keys : never;

/**
 * Data attribute that marks an element as the "initially active" composite
 * item. On first non-empty map update, `useCompositeRoot` picks up this marker
 * and moves `highlightedIndex` to the matching item.
 */
export const ACTIVE_COMPOSITE_ITEM = "data-composite-item-active";

/**
 * `orientation` value accepted by the composite root.
 */
export type CompositeOrientation = "horizontal" | "vertical" | "both";

/**
 * Text direction. Matches the shape used throughout Base UI; we don't depend on
 * a DirectionContext here — the composite root takes it as a plain prop so
 * consumers can thread in whatever source of truth they want.
 */
export type TextDirection = "ltr" | "rtl";