import { expect } from 'vitest';
import * as matchers from '@testing-library/jest-dom/matchers';

// Explicitly extend vitest's expect with jest-dom matchers.
// Using the explicit extend approach (not @testing-library/jest-dom/vitest) for
// compatibility with vitest@4.x (the /vitest barrel doesn't extend the same
// expect instance in vitest 4's module resolution).
expect.extend(matchers);

// Type augmentation for the custom matchers (adds toBeInTheDocument, etc.)
// This import only carries type declarations — no runtime effect.
import '@testing-library/jest-dom/vitest';

// Polyfill ResizeObserver for jsdom (needed by react-grid-layout)
if (typeof globalThis.ResizeObserver === 'undefined') {
  globalThis.ResizeObserver = class ResizeObserver {
    private callback: ResizeObserverCallback;
    constructor(callback: ResizeObserverCallback) {
      this.callback = callback;
    }
    observe() {
      // Fire callback immediately with a mock entry
      this.callback(
        [{ contentRect: { width: 1200, height: 800 } } as unknown as ResizeObserverEntry],
        this,
      );
    }
    unobserve() {}
    disconnect() {}
  };
}