import fs from 'node:fs';
import path from 'node:path';
import yaml from 'yaml';
import { SessionService } from './session.service';

const TEST_CONFIG_DIR = '/tmp/immich/';
const TEST_AUTH_FILE = path.join(TEST_CONFIG_DIR, 'auth.yml');
const TEST_IMMICH_INSTANCE_URL = 'https://test/api';
const TEST_IMMICH_API_KEY = 'pNussssKSYo5WasdgalvKJ1n9kdvaasdfbluPg';

const spyOnConsole = () => vi.spyOn(console, 'log').mockImplementation(() => {});

const createTestAuthFile = async (contents: string) => {
  if (!fs.existsSync(TEST_CONFIG_DIR)) {
    // Create config folder if it doesn't exist
    const created = await fs.promises.mkdir(TEST_CONFIG_DIR, { recursive: true });
    if (!created) {
      throw new Error(`Failed to create config folder ${TEST_CONFIG_DIR}`);
    }
  }

  fs.writeFileSync(TEST_AUTH_FILE, contents);
};

const readTestAuthFile = async (): Promise<string> => {
  return await fs.promises.readFile(TEST_AUTH_FILE, 'utf8');
};

const deleteAuthFile = () => {
  try {
    fs.unlinkSync(TEST_AUTH_FILE);
  } catch (error: any) {
    if (error.code !== 'ENOENT') {
      throw error;
    }
  }
};

const mocks = vi.hoisted(() => {
  return {
    getMyUserInfo: vi.fn(() => Promise.resolve({ email: 'admin@example.com' })),
    pingServer: vi.fn(() => Promise.resolve({ res: 'pong' })),
  };
});

vi.mock('./api.service', async (importOriginal) => {
  const module = await importOriginal<typeof import('./api.service')>();
  // @ts-expect-error this is only a partial implementation of the return value
  module.ImmichApi.prototype.getMyUserInfo = mocks.getMyUserInfo;
  module.ImmichApi.prototype.pingServer = mocks.pingServer;
  return module;
});

describe('SessionService', () => {
  let sessionService: SessionService;

  beforeEach(() => {
    deleteAuthFile();
    sessionService = new SessionService(TEST_CONFIG_DIR);
  });

  afterEach(() => {
    deleteAuthFile();
  });

  it('should connect to immich', async () => {
    await createTestAuthFile(
      JSON.stringify({
        apiKey: TEST_IMMICH_API_KEY,
        instanceUrl: TEST_IMMICH_INSTANCE_URL,
      }),
    );

    await sessionService.connect();
    expect(mocks.pingServer).toHaveBeenCalledTimes(1);
  });

  it('should error if no auth file exists', async () => {
    await sessionService.connect().catch((error) => {
      expect(error.message).toEqual('No auth file exist. Please login first');
    });
  });

  it('should error if auth file is missing instance URl', async () => {
    await createTestAuthFile(
      JSON.stringify({
        apiKey: TEST_IMMICH_API_KEY,
      }),
    );
    await sessionService.connect().catch((error) => {
      expect(error.message).toEqual(`Instance URL missing in auth config file ${TEST_AUTH_FILE}`);
    });
  });

  it('should error if auth file is missing api key', async () => {
    await createTestAuthFile(
      JSON.stringify({
        instanceUrl: TEST_IMMICH_INSTANCE_URL,
      }),
    );

    await expect(sessionService.connect()).rejects.toThrow(`API key missing in auth config file ${TEST_AUTH_FILE}`);
  });

  it('should create auth file when logged in', async () => {
    await sessionService.login(TEST_IMMICH_INSTANCE_URL, TEST_IMMICH_API_KEY);

    const data: string = await readTestAuthFile();
    const authConfig = yaml.parse(data);
    expect(authConfig.instanceUrl).toBe(TEST_IMMICH_INSTANCE_URL);
    expect(authConfig.apiKey).toBe(TEST_IMMICH_API_KEY);
  });

  it('should delete auth file when logging out', async () => {
    const consoleSpy = spyOnConsole();

    await createTestAuthFile(
      JSON.stringify({
        apiKey: TEST_IMMICH_API_KEY,
        instanceUrl: TEST_IMMICH_INSTANCE_URL,
      }),
    );
    await sessionService.logout();

    await fs.promises.access(TEST_AUTH_FILE, fs.constants.F_OK).catch((error) => {
      expect(error.message).toContain('ENOENT');
    });

    expect(consoleSpy.mock.calls).toEqual([
      ['Logging out...'],
      [`Removed auth file ${TEST_AUTH_FILE}`],
      ['Successfully logged out'],
    ]);
  });
});