import { SystemMetadataKey } from 'src/enum';
import { StorageService } from 'src/services/storage.service';
import { ImmichStartupError } from 'src/utils/misc';
import { mockEnvData } from 'test/repositories/config.repository.mock';
import { newTestService, ServiceMocks } from 'test/utils';

describe(StorageService.name, () => {
  let sut: StorageService;
  let mocks: ServiceMocks;

  beforeEach(() => {
    ({ sut, mocks } = newTestService(StorageService));
  });

  it('should work', () => {
    expect(sut).toBeDefined();
  });

  describe('onBootstrap', () => {
    it('should enable mount folder checking', async () => {
      mocks.systemMetadata.get.mockResolvedValue(null);

      await expect(sut.onBootstrap()).resolves.toBeUndefined();

      expect(mocks.systemMetadata.set).toHaveBeenCalledWith(SystemMetadataKey.SystemFlags, {
        mountChecks: {
          backups: true,
          'encoded-video': true,
          library: true,
          profile: true,
          thumbs: true,
          upload: true,
        },
      });
      expect(mocks.storage.mkdirSync).toHaveBeenCalledWith('upload/encoded-video');
      expect(mocks.storage.mkdirSync).toHaveBeenCalledWith('upload/library');
      expect(mocks.storage.mkdirSync).toHaveBeenCalledWith('upload/profile');
      expect(mocks.storage.mkdirSync).toHaveBeenCalledWith('upload/thumbs');
      expect(mocks.storage.mkdirSync).toHaveBeenCalledWith('upload/upload');
      expect(mocks.storage.mkdirSync).toHaveBeenCalledWith('upload/backups');
      expect(mocks.storage.createFile).toHaveBeenCalledWith('upload/encoded-video/.immich', expect.any(Buffer));
      expect(mocks.storage.createFile).toHaveBeenCalledWith('upload/library/.immich', expect.any(Buffer));
      expect(mocks.storage.createFile).toHaveBeenCalledWith('upload/profile/.immich', expect.any(Buffer));
      expect(mocks.storage.createFile).toHaveBeenCalledWith('upload/thumbs/.immich', expect.any(Buffer));
      expect(mocks.storage.createFile).toHaveBeenCalledWith('upload/upload/.immich', expect.any(Buffer));
      expect(mocks.storage.createFile).toHaveBeenCalledWith('upload/backups/.immich', expect.any(Buffer));
    });

    it('should enable mount folder checking for a new folder type', async () => {
      mocks.systemMetadata.get.mockResolvedValue({
        mountChecks: {
          backups: false,
          'encoded-video': true,
          library: false,
          profile: true,
          thumbs: true,
          upload: true,
        },
      });

      await expect(sut.onBootstrap()).resolves.toBeUndefined();

      expect(mocks.systemMetadata.set).toHaveBeenCalledWith(SystemMetadataKey.SystemFlags, {
        mountChecks: {
          backups: true,
          'encoded-video': true,
          library: true,
          profile: true,
          thumbs: true,
          upload: true,
        },
      });
      expect(mocks.storage.mkdirSync).toHaveBeenCalledTimes(2);
      expect(mocks.storage.mkdirSync).toHaveBeenCalledWith('upload/library');
      expect(mocks.storage.mkdirSync).toHaveBeenCalledWith('upload/backups');
      expect(mocks.storage.createFile).toHaveBeenCalledTimes(2);
      expect(mocks.storage.createFile).toHaveBeenCalledWith('upload/library/.immich', expect.any(Buffer));
      expect(mocks.storage.createFile).toHaveBeenCalledWith('upload/backups/.immich', expect.any(Buffer));
    });

    it('should throw an error if .immich is missing', async () => {
      mocks.systemMetadata.get.mockResolvedValue({ mountChecks: { upload: true } });
      mocks.storage.readFile.mockRejectedValue(new Error("ENOENT: no such file or directory, open '/app/.immich'"));

      await expect(sut.onBootstrap()).rejects.toThrow('Failed to read');

      expect(mocks.storage.createOrOverwriteFile).not.toHaveBeenCalled();
      expect(mocks.systemMetadata.set).not.toHaveBeenCalled();
    });

    it('should throw an error if .immich is present but read-only', async () => {
      mocks.systemMetadata.get.mockResolvedValue({ mountChecks: { upload: true } });
      mocks.storage.overwriteFile.mockRejectedValue(
        new Error("ENOENT: no such file or directory, open '/app/.immich'"),
      );

      await expect(sut.onBootstrap()).rejects.toThrow('Failed to write');

      expect(mocks.systemMetadata.set).not.toHaveBeenCalled();
    });

    it('should skip mount file creation if file already exists', async () => {
      const error = new Error('Error creating file') as any;
      error.code = 'EEXIST';
      mocks.systemMetadata.get.mockResolvedValue({ mountChecks: {} });
      mocks.storage.createFile.mockRejectedValue(error);

      await expect(sut.onBootstrap()).resolves.toBeUndefined();

      expect(mocks.logger.warn).toHaveBeenCalledWith('Found existing mount file, skipping creation');
    });

    it('should throw an error if mount file could not be created', async () => {
      mocks.systemMetadata.get.mockResolvedValue({ mountChecks: {} });
      mocks.storage.createFile.mockRejectedValue(new Error('Error creating file'));

      await expect(sut.onBootstrap()).rejects.toBeInstanceOf(ImmichStartupError);
      expect(mocks.systemMetadata.set).not.toHaveBeenCalled();
    });

    it('should startup if checks are disabled', async () => {
      mocks.systemMetadata.get.mockResolvedValue({ mountChecks: { upload: true } });
      mocks.config.getEnv.mockReturnValue(
        mockEnvData({
          storage: { ignoreMountCheckErrors: true },
        }),
      );
      mocks.storage.overwriteFile.mockRejectedValue(
        new Error("ENOENT: no such file or directory, open '/app/.immich'"),
      );

      await expect(sut.onBootstrap()).resolves.toBeUndefined();

      expect(mocks.systemMetadata.set).not.toHaveBeenCalled();
    });
  });

  describe('handleDeleteFiles', () => {
    it('should handle null values', async () => {
      await sut.handleDeleteFiles({ files: [undefined, null] });

      expect(mocks.storage.unlink).not.toHaveBeenCalled();
    });

    it('should handle an error removing a file', async () => {
      mocks.storage.unlink.mockRejectedValue(new Error('something-went-wrong'));

      await sut.handleDeleteFiles({ files: ['path/to/something'] });

      expect(mocks.storage.unlink).toHaveBeenCalledWith('path/to/something');
    });

    it('should remove the file', async () => {
      await sut.handleDeleteFiles({ files: ['path/to/something'] });

      expect(mocks.storage.unlink).toHaveBeenCalledWith('path/to/something');
    });
  });
});