import { SecretManagerServiceClient } from '@google-cloud/secret-manager';
import { BadRequestException } from '@nestjs/common';
import { SecretsClient } from './secrets.client';
import SpyInstance = jest.SpyInstance;

const RESOLVED_SECRET = '-secret-';

describe('SecretsClient', () => {
  let secretsClient: SecretsClient;
  let accessSecretVersionSpy: SpyInstance;

  beforeEach(() => {
    accessSecretVersionSpy = jest.spyOn(SecretManagerServiceClient.prototype, 'accessSecretVersion');
    secretsClient = new SecretsClient('my-project-id');
  });

  describe('fetchSecret', () => {
    it('fetches secret and returns the result', async () => {
      accessSecretVersionSpy.mockImplementationOnce(() =>
        Promise.resolve([
          {
            payload: {
              data: RESOLVED_SECRET,
            },
          },
        ]),
      );

      const result = await secretsClient.fetchSecret('MY_SECRET');

      expect(result).toBe(RESOLVED_SECRET);
      expect(accessSecretVersionSpy).toHaveBeenCalledWith({
        name: 'projects/my-project-id/secrets/MY_SECRET/versions/latest',
      });
    });

    it('fetches secret and throws an exception when it does not exist', async () => {
      accessSecretVersionSpy.mockImplementationOnce(() =>
        Promise.resolve([
          {
            payload: {},
          },
        ]),
      );

      await expect(secretsClient.fetchSecret('MY_SECRET')).rejects.toEqual(
        new BadRequestException('Cannot find secret: MY_SECRET'),
      );
    });
  });
});