import { describe, expect, it } from 'vitest';
import type { TenantPackageSummary } from '../../api';
import { buildPackageUsageMetrics, usagePercent } from '../billingUsage';

const basePackage: TenantPackageSummary = {
  id: 1,
  package_id: 1,
  package_name: 'Pro',
  active: true,
  used_events: 2,
  remaining_events: 3,
  price: 120,
  currency: 'EUR',
  purchased_at: null,
  expires_at: null,
  package_limits: {
    max_events_per_year: 5,
    max_guests: 150,
    max_photos: 1000,
  },
  branding_allowed: true,
  watermark_allowed: true,
  features: null,
};

describe('buildPackageUsageMetrics', () => {
  it('builds usage metrics for event, guest, and photo limits', () => {
    const metrics = buildPackageUsageMetrics(basePackage);
    const keys = metrics.map((metric) => metric.key);
    expect(keys).toEqual(['events', 'guests', 'photos']);

    const eventMetric = metrics.find((metric) => metric.key === 'events');
    expect(eventMetric?.used).toBe(2);
    expect(eventMetric?.limit).toBe(5);
    expect(eventMetric?.remaining).toBe(3);
  });

  it('filters metrics without limits', () => {
    const metrics = buildPackageUsageMetrics({
      ...basePackage,
      package_limits: { max_events_per_year: 0 },
    });
    expect(metrics).toHaveLength(0);
  });
});

describe('usagePercent', () => {
  it('calculates usage percent when usage is known', () => {
    const metrics = buildPackageUsageMetrics(basePackage);
    const eventMetric = metrics.find((metric) => metric.key === 'events');
    expect(eventMetric).toBeTruthy();
    expect(usagePercent(eventMetric!)).toBe(40);
  });

  it('defaults to full bar when usage is unknown', () => {
    const metrics = buildPackageUsageMetrics({
      ...basePackage,
      used_events: NaN,
      remaining_events: null,
      package_limits: { max_events_per_year: 10 },
    });
    expect(usagePercent(metrics[0])).toBe(100);
  });
});