import { describe, expect, it } from 'vitest';
import { adaptiveGraphCardScale, minimumReadableGraphCardZoom } from '../../src/features/mitre-graph/graph-card-scale';

describe('adaptive graph card scale', () => {
  it('keeps cards at their readable native size while zoomed out', () => {
    const scale = adaptiveGraphCardScale(0.08, 0.7, 0.76);
    expect(scale.screenScale).toBe(0.7);
    expect(scale.graphScale * 0.08).toBeCloseTo(0.7);
  });

  it('grows gently and remains capped at maximum zoom', () => {
    const scale = adaptiveGraphCardScale(4, 0.7, 0.76);
    expect(scale.screenScale).toBe(0.76);
    expect(scale.graphScale * 4).toBeCloseTo(0.76);
  });

  it('keeps individual cards available but requires more zoom for dense extracts', () => {
    expect(minimumReadableGraphCardZoom(1)).toBe(0);
    expect(minimumReadableGraphCardZoom(2)).toBe(0);
    expect(minimumReadableGraphCardZoom(20)).toBeGreaterThan(0.6);
    expect(minimumReadableGraphCardZoom(200)).toBeLessThanOrEqual(0.8);
  });
});