import { tap, expect } from '@git.zone/tstest/tapbundle';

import { CloudlyRegistryManager } from '../ts/manager.registry/classes.registrymanager.js';

const digest = (fillArg: string): string => `sha256:${fillArg.repeat(64)}`;

class FakeRegistryStorage {
  public objects = new Map<string, Buffer>();

  public async getObject(pathArg: string): Promise<Buffer | null> {
    return this.objects.get(pathArg) || null;
  }

  public async putObject(pathArg: string, dataArg: Buffer): Promise<void> {
    this.objects.set(pathArg, dataArg);
  }

  public async deleteObject(pathArg: string): Promise<void> {
    this.objects.delete(pathArg);
  }

  public async objectExists(pathArg: string): Promise<boolean> {
    return this.objects.has(pathArg);
  }

  public async listObjects(prefixArg: string): Promise<string[]> {
    return Array.from(this.objects.keys()).filter((pathArg) => pathArg.startsWith(prefixArg));
  }

  public async getOciManifest(repositoryArg: string, digestArg: string): Promise<Buffer | null> {
    return this.getObject(`oci/manifests/${repositoryArg}/${digestArg.slice('sha256:'.length)}`);
  }
}

const putJson = (storageArg: FakeRegistryStorage, pathArg: string, dataArg: unknown): void => {
  storageArg.objects.set(pathArg, Buffer.from(JSON.stringify(dataArg)));
};

tap.test('should delete Cloudly service-owned OCI repository without deleting shared blobs', async () => {
  const storage = new FakeRegistryStorage();
  const manager = Object.create(CloudlyRegistryManager.prototype) as any;
  const service = {
    id: 'service-1',
    data: {
      registryTarget: { repository: 'workloads/ghost-service-1' },
    },
  };
  manager.started = true;
  manager.smartRegistry = { getStorage: () => storage };
  manager.recordedTagDigests = new Map([
    ['workloads/ghost-service-1:latest', digest('a')],
  ]);
  manager.cloudlyRef = {
    serviceManager: {
      CService: { getInstances: async () => [service] },
    },
  };

  const targetDigest = digest('a');
  const otherDigest = digest('b');
  const sharedLayerDigest = digest('c');
  const targetOnlyLayerDigest = digest('d');
  const otherOnlyLayerDigest = digest('e');
  putJson(storage, 'oci/tags/workloads/ghost-service-1/tags.json', { latest: targetDigest });
  putJson(storage, 'oci/tags/workloads/other-service/tags.json', { latest: otherDigest });
  putJson(storage, `oci/manifests/workloads/ghost-service-1/${targetDigest.slice('sha256:'.length)}`, {
    layers: [{ digest: sharedLayerDigest }, { digest: targetOnlyLayerDigest }],
  });
  putJson(storage, `oci/manifests/workloads/other-service/${otherDigest.slice('sha256:'.length)}`, {
    layers: [{ digest: sharedLayerDigest }, { digest: otherOnlyLayerDigest }],
  });
  for (const blobDigest of [sharedLayerDigest, targetOnlyLayerDigest, otherOnlyLayerDigest]) {
    storage.objects.set(`oci/blobs/sha256/${blobDigest.slice('sha256:'.length)}`, Buffer.from(blobDigest));
  }

  await manager.deleteServiceRepository(service);

  expect(storage.objects.has('oci/tags/workloads/ghost-service-1/tags.json')).toBeFalse();
  expect(storage.objects.has(`oci/manifests/workloads/ghost-service-1/${targetDigest.slice('sha256:'.length)}`)).toBeFalse();
  expect(storage.objects.has(`oci/blobs/sha256/${targetOnlyLayerDigest.slice('sha256:'.length)}`)).toBeFalse();
  expect(storage.objects.has(`oci/blobs/sha256/${sharedLayerDigest.slice('sha256:'.length)}`)).toBeTrue();
  expect(storage.objects.has(`oci/blobs/sha256/${otherOnlyLayerDigest.slice('sha256:'.length)}`)).toBeTrue();
  expect(manager.recordedTagDigests.has('workloads/ghost-service-1:latest')).toBeFalse();
});

export default tap.start();