import { vi } from "vitest";
import { type StubOptions, type StubOverrides } from "./firebase.model";

import defaultOptions from "./helpers/defaultMockOptions";
import { FakeFirestore } from "..";
import type {
  Query,
  CollectionReference,
  DocumentReference,
  FieldValue,
  Timestamp,
  Transaction,
  FieldPath,
} from "..";

declare class Firestore extends FakeFirestore {
  constructor();
}

interface GCloudFirestoreMock {
  Firestore: typeof Firestore;
  Query: typeof Query;
  CollectionReference: typeof CollectionReference;
  DocumentReference: typeof DocumentReference;
  FieldValue: typeof FieldValue;
  FieldPath: typeof FieldPath;
  Timestamp: typeof Timestamp;
  Transaction: typeof Transaction;
}

export const firestoreStub = async (
  overrides?: StubOverrides,
  options: StubOptions = defaultOptions
): Promise<GCloudFirestoreMock> => {
  const {
    FakeFirestore,
    Query,
    CollectionReference,
    DocumentReference,
    FieldValue,
    Timestamp,
    Transaction,
    FieldPath,
  } = await import("firestore-vitest-mock");

  class Firestore extends FakeFirestore {
    constructor() {
      super(overrides?.database, options);
    }
  }
  return {
    Query,
    CollectionReference,
    DocumentReference,
    FieldValue,
    FieldPath,
    Timestamp,
    Transaction,
    Firestore,
  };
};

export const mockGoogleCloudFirestore = (
  overrides?: StubOverrides,
  options: StubOptions = defaultOptions
): void => {
  mockModuleIfFound("@google-cloud/firestore", overrides, options);
};

function mockModuleIfFound(
  moduleName: string,
  overrides?: StubOverrides,
  options?: StubOptions
): void {
  try {
    require.resolve(moduleName);
    vi.doMock(moduleName, async () => await firestoreStub(overrides, options));
  } catch (e) {
    // eslint-disable-next-line no-console
    console.info(`Module ${moduleName} not found, mocking skipped.`);
  }
}