import { describe, expect, it } from 'vitest';

import { DEFAULT_FONTS, FONT_CATALOG, fontEntry, fontSlug, fontStack } from './fonts';

describe('font catalog (issue #66, ADR 0016)', () => {
  it('is non-trivial and has unique families', () => {
    expect(FONT_CATALOG.length).toBeGreaterThanOrEqual(15);
    const families = FONT_CATALOG.map((f) => f.family);
    expect(new Set(families).size).toBe(families.length);
  });

  it('every entry carries license info and weights (what the build step enforces)', () => {
    for (const entry of FONT_CATALOG) {
      expect(entry.family, entry.id).toBeTruthy();
      expect(entry.license, entry.family).toMatch(/OFL-1\.1|Apache-2\.0/);
      expect(entry.licenseUrl, entry.family).toMatch(/^https:\/\//);
      expect(entry.weights.length, entry.family).toBeGreaterThan(0);
      expect(entry.id, entry.family).toMatch(/^[a-z0-9-]+$/);
    }
  });

  it('the vision defaults exist in the catalog at their weights', () => {
    for (const slot of ['heading', 'body', 'mono'] as const) {
      const { family, weight } = DEFAULT_FONTS[slot];
      const entry = fontEntry(family);
      expect(entry, `${slot} default family`).toBeDefined();
      expect(entry!.weights, `${family} @ ${weight}`).toContain(weight);
    }
  });

  it('builds a stack with the family ahead of a category fallback', () => {
    expect(fontStack('Roboto')).toBe("'Roboto', system-ui, -apple-system, 'Segoe UI', sans-serif");
    expect(fontStack('Merriweather')).toContain("'Merriweather'");
    expect(fontStack('Fira Code')).toContain('monospace');
    // An unknown family falls back to the sans system stack, no bogus family.
    expect(fontStack('Nonexistent Font')).not.toContain('Nonexistent');
  });

  it('slugs families to the on-disk /fonts layout', () => {
    expect(fontSlug('Source Serif 4')).toBe('source-serif-4');
    expect(fontSlug('IBM Plex Mono')).toBe('ibm-plex-mono');
  });
});