// Exposes the WASM `Core` instance through a Svelte context so views
// that need its math bridge (Phase 18 ship-class preview, future
// inspector calculators) can read it without re-booting the module.
// The layout populates `core` after `loadCore()` resolves; consumers
// observe `null` while the boot is in flight and the live `Core`
// once the runtime is ready.

import type { Core } from "../platform/core/index";

/**
 * CORE_CONTEXT_KEY is the Svelte context key the in-game shell
 * layout uses to expose its booted `Core` to descendants such as
 * the ship-class designer preview pane.
 */
export const CORE_CONTEXT_KEY = Symbol("core");

export interface CoreHandle {
	readonly core: Core | null;
}

export class CoreHolder implements CoreHandle {
	#core: Core | null = $state(null);

	get core(): Core | null {
		return this.#core;
	}

	set(core: Core | null): void {
		this.#core = core;
	}
}