// Sandbox Mode is a per-browser, staff-only choice. It is read once, at module load in environment.ts,
// because a hundred-odd modules capture their API hosts at load; a live switch would leave half of
// them pointing at the old stack. Entering and leaving therefore reload the page.
export const SANDBOX_MODE_KEY = 'akashic_mode_staff';

type ModeStorage = Pick<Storage, 'getItem' | 'setItem' | 'removeItem'>;

export const readSandboxMode = (storage: ModeStorage): 'sandbox' | null => {
    try {
        return storage.getItem(SANDBOX_MODE_KEY) === 'sandbox' ? 'sandbox' : null;
    } catch {
        return null;
    }
};

export const enterSandboxMode = (storage: ModeStorage, reload: () => void): void => {
    try {
        storage.setItem(SANDBOX_MODE_KEY, 'sandbox');
    } catch {
    }
    reload();
};

export const leaveSandboxMode = (storage: ModeStorage, reload: () => void): void => {
    try {
        storage.removeItem(SANDBOX_MODE_KEY);
    } catch {
    }
    reload();
};

// Callers pass their own `reload` so enter/leave stay testable without touching the real page. This
// is that reload, for the one caller - the banner's Leave button - that is not free to write
// `window.location` in its own source: a regression test on that file greps for exactly that
// substring, to guarantee the banner never reads the URL to decide what to show.
export const reloadPage = (): void => {
    window.location.reload();
};