import { beforeEach, describe, expect, it, jest } from "@jest/globals";
import { NotificationService } from "../../src/services/NotificationService";
import { UnoptimizedInMemoryRepository } from "../../src/repositories/UnoptimizedInMemoryRepository";
import fs from "fs";
import { IEta } from "../../src/entities/entities";
import { updateGlobalFetchMockJson } from "../testHelpers/fetchMockHelpers";

jest.mock("fs");

const sampleKey = `-----BEGIN PRIVATE KEY-----
MIGTAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBHkwdwIBAQQgsrmSAZIagOfCP8sB
Wi2CBXG1Oo7v1bispIZCwIr4RDegCgYIKoZIzj0DAQehRANCAATZHxV2wQJLMBq+
ya+yfGi3g2ZUv6hrfe+j08ytekPHjXS0qzJoVELzKHa6EL9YAoZDXBtB6h+fGhXe
SOcONbaf
-----END PRIVATE KEY-----`

describe("NotificationService", () => {
  let repository: UnoptimizedInMemoryRepository
  let notificationService: NotificationService;

  beforeEach(() => {
    repository = new UnoptimizedInMemoryRepository();
    notificationService = new NotificationService(repository);

    // Ensure that tests don't hit the server
    process.env = {
      ...process.env,
      APNS_KEY_ID: "1",
      APNS_TEAM_ID: "1",
      APNS_KEY_PATH: "./dummy-path.p8"
    };

    (fs.readFileSync as jest.Mock).mockReturnValue(sampleKey);
  })

  describe("reloadAPNsTokenIfTimePassed", () => {
    it("reloads the token if token hasn't been generated yet", async () => {
      notificationService.reloadAPNsTokenIfTimePassed();
      expect(notificationService.lastRefreshedTimeMs).toBeDefined();
    });

    it("doesn't reload the token if last refreshed time is recent", async () => {
      notificationService.reloadAPNsTokenIfTimePassed();
      const lastRefreshedTimeMs = notificationService.lastRefreshedTimeMs;

      notificationService.reloadAPNsTokenIfTimePassed();
      // Expect no change to have occurred
      expect(lastRefreshedTimeMs).toEqual(notificationService.lastRefreshedTimeMs);
    });
  })

  describe("scheduleNotification", () => {
    it("schedules the notification", async () => {
      // arrange
      const notificationData = {
        deviceId: "1",
        shuttleId: "1",
        stopId: "1"
      };

      await notificationService.scheduleNotification(notificationData);

      const isNotificationScheduled = notificationService.isNotificationScheduled(notificationData);
      expect(isNotificationScheduled).toEqual(true);
    });

    it("sends and clears correct notification after ETA changed", async () => {
      // Arrange
      const eta: IEta = {
        shuttleId: "1",
        stopId: "1",
        secondsRemaining: 120,
      };

      // Simulate 200 + empty object for successful push notification
      updateGlobalFetchMockJson({});

      // Act
      const notificationData1 = {
        deviceId: "1",
        shuttleId: eta.shuttleId,
        stopId: eta.stopId,
      }
      const notificationData2 = {
        ...notificationData1,
        deviceId: "2",
      }
      await notificationService.scheduleNotification(notificationData1);
      await notificationService.scheduleNotification(notificationData2);
      await repository.addOrUpdateEta(eta);

      // Assert
      expect(fetch as jest.Mock).toHaveBeenCalledTimes(1);
      const isFirstNotificationScheduled = notificationService.isNotificationScheduled(notificationData1);
      const isSecondNotificationScheduled = notificationService.isNotificationScheduled(notificationData2);
      // No longer scheduled after being sent
      expect(isFirstNotificationScheduled).toBe(false);
      expect(isSecondNotificationScheduled).toBe(false);
    });

    it("leaves notification in array if delivery unsuccessful", async () => {
    });
  });

  describe("cancelNotification", () => {
    it("stops notification from sending to given shuttle/stop ID", async () => {

    });
  });

  describe("cancelAllNotifications", () => {
    it("clears all notifications scheduled to be sent", async () => {

    });
  })
});