import { describe, it, expect } from 'vitest';
import { PRICING } from './cost-pricing.mjs';

describe('PRICING constants', () => {
  it('exposes sonnet pricing per-token', () => {
    // Sonnet 4.6: $3/Mtok input → 3e-6 per token
    expect(PRICING.sonnet.input).toBeCloseTo(3 / 1_000_000, 12);
    // Sonnet 4.6: $15/Mtok output → 15e-6 per token
    expect(PRICING.sonnet.output).toBeCloseTo(15 / 1_000_000, 12);
  });

  it('exposes opus pricing per-token', () => {
    // Opus 4.7: $15/Mtok input → 15e-6 per token
    expect(PRICING.opus.input).toBeCloseTo(15 / 1_000_000, 12);
    // Opus 4.7: $75/Mtok output → 75e-6 per token
    expect(PRICING.opus.output).toBeCloseTo(75 / 1_000_000, 12);
  });

  it('opus output is 5x sonnet output (sanity check)', () => {
    expect(PRICING.opus.output / PRICING.sonnet.output).toBeCloseTo(5, 6);
  });

  it('PRICING object is frozen', () => {
    expect(Object.isFrozen(PRICING)).toBe(true);
    expect(Object.isFrozen(PRICING.sonnet)).toBe(true);
    expect(Object.isFrozen(PRICING.opus)).toBe(true);
  });
});