import { InMemoryUsageRepo, UsageEntry } from '../src/usage';

const entry = (over: Partial<UsageEntry> = {}): UsageEntry => ({
  customerId: 'cust_1',
  endpointId: 'transform',
  cents: 4,
  metadataBytes: 0,
  attachmentBytes: 0,
  timestamp: new Date('2026-07-27T10:00:00Z'),
  ...over,
});

describe('InMemoryUsageRepo', () => {
  it('records and lists entries per customer', () => {
    const repo = new InMemoryUsageRepo();
    repo.record(entry());
    repo.record(entry({ customerId: 'cust_2' }));
    expect(repo.listFor('cust_1')).toHaveLength(1);
    expect(repo.listFor('cust_2')).toHaveLength(1);
  });

  it('filters entries by since date', () => {
    const repo = new InMemoryUsageRepo();
    repo.record(entry({ timestamp: new Date('2026-07-01T00:00:00Z') }));
    repo.record(entry({ timestamp: new Date('2026-07-27T00:00:00Z') }));
    expect(repo.listFor('cust_1', new Date('2026-07-15T00:00:00Z'))).toHaveLength(1);
  });

  it('summarizes totals by endpoint', () => {
    const repo = new InMemoryUsageRepo();
    repo.record(entry());
    repo.record(entry({ endpointId: 'storage', cents: 112 }));
    repo.record(entry());
    const s = repo.summaryFor('cust_1');
    expect(s.customerId).toBe('cust_1');
    expect(s.calls).toBe(3);
    expect(s.totalCents).toBe(120);
    expect(s.byEndpoint.transform).toEqual({ calls: 2, cents: 8 });
    expect(s.byEndpoint.storage).toEqual({ calls: 1, cents: 112 });
  });
});