import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { resolvePriceId, priceIdToTier } from '@/lib/billing/stripe-prices';

describe('billing-price-map', () => {
  const originalEnv = process.env;

  beforeEach(() => {
    process.env = {
      ...originalEnv,
      STRIPE_PRICE_PRO_MONTHLY: 'price_pro_monthly_test',
      STRIPE_PRICE_PRO_ANNUAL: 'price_pro_annual_test',
      STRIPE_PRICE_BUSINESS_MONTHLY: 'price_business_monthly_test',
      STRIPE_PRICE_BUSINESS_ANNUAL: 'price_business_annual_test',
    };
  });

  afterEach(() => {
    process.env = originalEnv;
  });

  describe('resolvePriceId', () => {
    it('returns PRO monthly price ID', () => {
      expect(resolvePriceId('PRO', 'month')).toBe('price_pro_monthly_test');
    });

    it('returns PRO annual price ID', () => {
      expect(resolvePriceId('PRO', 'year')).toBe('price_pro_annual_test');
    });

    it('returns BUSINESS monthly price ID', () => {
      expect(resolvePriceId('BUSINESS', 'month')).toBe('price_business_monthly_test');
    });

    it('returns BUSINESS annual price ID', () => {
      expect(resolvePriceId('BUSINESS', 'year')).toBe('price_business_annual_test');
    });

    it('throws if env variable is not set', () => {
      delete process.env.STRIPE_PRICE_PRO_MONTHLY;
      expect(() => resolvePriceId('PRO', 'month')).toThrow();
    });
  });

  describe('priceIdToTier', () => {
    it('resolves PRO monthly price ID to PRO tier', () => {
      expect(priceIdToTier('price_pro_monthly_test')).toBe('PRO');
    });

    it('resolves PRO annual price ID to PRO tier', () => {
      expect(priceIdToTier('price_pro_annual_test')).toBe('PRO');
    });

    it('resolves BUSINESS monthly price ID to BUSINESS tier', () => {
      expect(priceIdToTier('price_business_monthly_test')).toBe('BUSINESS');
    });

    it('resolves BUSINESS annual price ID to BUSINESS tier', () => {
      expect(priceIdToTier('price_business_annual_test')).toBe('BUSINESS');
    });

    it('returns null for unknown price ID', () => {
      expect(priceIdToTier('price_unknown_xyz')).toBeNull();
    });

    it('returns null when env variables are not set', () => {
      delete process.env.STRIPE_PRICE_PRO_MONTHLY;
      delete process.env.STRIPE_PRICE_PRO_ANNUAL;
      delete process.env.STRIPE_PRICE_BUSINESS_MONTHLY;
      delete process.env.STRIPE_PRICE_BUSINESS_ANNUAL;
      expect(priceIdToTier('price_pro_monthly_test')).toBeNull();
    });
  });
});