// React-specific polyfill layer. The base webcrypto polyfill is loaded via
// `@suaveplan/testing/polyfills` (see vitest.config.ts setupFiles). This
// file adds the React 18+ `IS_REACT_ACT_ENVIRONMENT` global expected by
// React DOM when assertions are made outside an `act(...)` wrapper, plus
// a `ResizeObserver` shim used by react-hook-form's controller in some
// happy-dom branches.

interface ReactActEnvWindow {
    IS_REACT_ACT_ENVIRONMENT?: boolean;
}

const win = globalThis as unknown as ReactActEnvWindow;
if (win.IS_REACT_ACT_ENVIRONMENT === undefined) {
    win.IS_REACT_ACT_ENVIRONMENT = true;
}

interface MaybeResizeObserverGlobal {
    ResizeObserver?: unknown;
}

class ResizeObserverPolyfill {
    public observe(): void {
        // no-op: happy-dom does not lay out elements, so observed entries
        // would always carry size 0 — the polyfill is structural only.
    }
    public unobserve(): void {
        // no-op
    }
    public disconnect(): void {
        // no-op
    }
}

const maybeRO = globalThis as unknown as MaybeResizeObserverGlobal;
if (maybeRO.ResizeObserver === undefined) {
    maybeRO.ResizeObserver = ResizeObserverPolyfill;
}