import { describe, it, expect } from 'vitest';
import { derivePulseStatus } from '../src/lib/db.js';

const ago = (mins: number) => new Date(Date.now() - mins * 60_000).toISOString();
const ahead = (mins: number) => new Date(Date.now() + mins * 60_000).toISOString();

describe('derivePulseStatus', () => {
  it('a draft stays a draft regardless of dates', () => {
    expect(derivePulseStatus('draft', ago(60))).toBe('draft');
    expect(derivePulseStatus('draft', ahead(60))).toBe('draft');
  });

  it('a closed pulse stays closed', () => {
    expect(derivePulseStatus('closed', ahead(60))).toBe('closed');
    expect(derivePulseStatus('closed', ago(60))).toBe('closed');
  });

  it('an open pulse stays open while now < closes_at', () => {
    expect(derivePulseStatus('open', ahead(1))).toBe('open');
    expect(derivePulseStatus('open', ahead(60 * 24))).toBe('open');
  });

  it('an open pulse becomes closed once now ≥ closes_at', () => {
    expect(derivePulseStatus('open', ago(1))).toBe('closed');
    expect(derivePulseStatus('open', ago(60 * 24))).toBe('closed');
  });

  it('respects an injected anchor time (deterministic)', () => {
    const closes = '2026-05-11T12:00:00Z';
    expect(derivePulseStatus('open', closes, new Date('2026-05-11T11:59:59Z'))).toBe('open');
    expect(derivePulseStatus('open', closes, new Date('2026-05-11T12:00:00Z'))).toBe('closed');
    expect(derivePulseStatus('open', closes, new Date('2026-05-11T12:00:01Z'))).toBe('closed');
  });
});