import { beforeEach, describe, expect, jest, test } from "@jest/globals";
import {
  ApiBasedRepository,
  ApiBasedRepositoryCache,
  ApiBasedRepositoryMillisecondTTLs
} from "../../src/repositories/ApiBasedRepository";
import { IEta } from "../../src/entities/entities";

/**
 * Update the global fetch function to return a specific object.
 * @param obj
 */
function updateGlobalFetchMockJson(obj: any) {
  // @ts-ignore
  global.fetch = jest.fn(() => {
    return Promise.resolve({
      json: () => Promise.resolve(obj)
    })
  }) as jest.Mock;
}

/**
 * Reset the global fetch function mock's JSON to return an empty object.
 * @param obj
 */
function resetGlobalFetchMockJson() {
  updateGlobalFetchMockJson({})
}

beforeEach(() => {
  resetGlobalFetchMockJson();
})

// Snapshot taken from the Passio GO! API
const genericEtaDataByStopId = {
  "177666": [
    {
      "OOS": 0,
      "busName": "08",
      "distance": 1,
      "speed": 10.028535400123669,
      "routeBlockId": "142270",
      "actualRouteBlockId": "142270",
      "arrived": null,
      "eta": "10 min ",
      "color": "#000000",
      "bg": "#ffea3f",
      "order": 0,
      "dwell": null,
      "stopsAmount": 2,
      "secondsSpent": 587,
      "etaR": "10",
      "error": null,
      "outdated": 0,
      "routeId": "53966",
      "serviceTime": "",
      "scheduleTimes": [],
      "goShowSchedule": 0,
      "looping": "1",
      "routeGroupId": "6703",
      "busId": 5577,
      "tripId": 751430,
      "deviceId": 402840,
      "created": "2025-01-07 15:00:09",
      "routePointPosition": 6,
      "routeStopPosition": 1,
      "stopRoutePointPosition": 217,
      "timezoneOffset": -10800,
      "busLatLng": [
        33.7933406,
        -117.8539321
      ],
      "busProjectionLatlng": {
        "lat": 33.79331052666975,
        "lng": -117.85392945849208
      },
      "busProjectionError": 3,
      "stopId": "177666",
      "theStop": {
        "name": "Chapman Court",
        "position": 3,
        "userId": "263",
        "routeStopId": "1348785",
        "busId": 5577,
        "routeName": "Red Route",
        "shortName": null,
        "routeId": "53966",
        "stopId": "177666"
      }
    },
    {
      "OOS": 0,
      "busName": "07",
      "distance": 1,
      "speed": 12.160256921380398,
      "routeBlockId": "142270",
      "actualRouteBlockId": "142270",
      "arrived": null,
      "eta": "11 min ",
      "color": "#000000",
      "bg": "#ffea3f",
      "order": 0,
      "dwell": null,
      "stopsAmount": 2,
      "secondsSpent": 635,
      "etaR": "11",
      "error": null,
      "outdated": 0,
      "routeId": "53966",
      "serviceTime": "",
      "scheduleTimes": [],
      "goShowSchedule": 0,
      "looping": "1",
      "routeGroupId": "6703",
      "busId": 5576,
      "tripId": 751430,
      "deviceId": 441065,
      "created": "2025-01-07 15:00:10",
      "routePointPosition": 448,
      "routeStopPosition": 4,
      "stopRoutePointPosition": 217,
      "timezoneOffset": -10800,
      "busLatLng": [
        33.7933284,
        -117.855132
      ],
      "busProjectionLatlng": {
        "lat": 33.79332033922653,
        "lng": -117.85513217762522
      },
      "busProjectionError": 1,
      "stopId": "177666",
      "theStop": {
        "name": "Chapman Court",
        "position": 3,
        "userId": "263",
        "routeStopId": "1348785",
        "busId": 5576,
        "routeName": "Red Route",
        "shortName": null,
        "routeId": "53966",
        "stopId": "177666"
      }
    },
    {
      "OOS": 0,
      "busName": "10",
      "distance": 1,
      "speed": 11.085164763991688,
      "routeBlockId": "142270",
      "actualRouteBlockId": "142270",
      "arrived": null,
      "eta": "19 min ",
      "color": "#000000",
      "bg": "#ffea3f",
      "order": 0,
      "dwell": null,
      "stopsAmount": 2,
      "secondsSpent": 1150,
      "etaR": "19",
      "error": null,
      "outdated": 0,
      "routeId": "53966",
      "serviceTime": "",
      "scheduleTimes": [],
      "goShowSchedule": 0,
      "looping": "1",
      "routeGroupId": "6703",
      "busId": 7105,
      "tripId": 751430,
      "deviceId": 404873,
      "created": "2025-01-07 15:00:08",
      "routePointPosition": 254,
      "routeStopPosition": 3,
      "stopRoutePointPosition": 217,
      "timezoneOffset": -10800,
      "busLatLng": [
        33.7917895,
        -117.8901868
      ],
      "busProjectionLatlng": {
        "lat": 33.79179583075815,
        "lng": -117.8902164019431
      },
      "busProjectionError": 3,
      "stopId": "177666",
      "theStop": {
        "name": "Chapman Court",
        "position": 3,
        "userId": "263",
        "routeStopId": "1348785",
        "busId": 7105,
        "routeName": "Red Route",
        "shortName": null,
        "routeId": "53966",
        "stopId": "177666"
      }
    }
  ]
}

describe("getEtaForShuttleAndStopId", () => {
  test("getEtaForShuttleAndStopId returns correct ETA data", async () => {
    updateGlobalFetchMockJson(genericEtaDataByStopId);

    const repository = new ApiBasedRepository();
    const result = await repository.getEtaForShuttleAndStopId("5577", "177666");

    expect(result?.secondsRemaining).toEqual(587);
    expect(result?.millisecondsSinceEpoch).toBeDefined();
  });

  test("getEtaForShuttleAndStopId returns null if API call is invalid", async () => {
    const repository = new ApiBasedRepository();
    const result = await repository.getEtaForShuttleAndStopId("5577", "177666");

    expect(result).toEqual(null);
  });

  test("getEtasForShuttleAndStopId returns old data if not expired", async () => {
    updateGlobalFetchMockJson(genericEtaDataByStopId);

    const expectedEta: IEta = {
      secondsRemaining: 587,
      shuttleId: "5577",
      stopId: "177666",
      millisecondsSinceEpoch: Date.now(),
    };

    const initialCache: ApiBasedRepositoryCache = {
      etasForShuttleId: {
        "5577": [
          expectedEta,
        ],
      },
      etasForStopId: {
        "177666": [
          expectedEta,
        ],
      },
    };

    const ttls: ApiBasedRepositoryMillisecondTTLs = {
      etasForShuttleId: 100000,
      etasForStopId: 100000,
    }

    const repository = new ApiBasedRepository(initialCache, ttls);
    const result = repository.getEtaForShuttleAndStopId("5577", "177666");

    expect(result).toEqual(expectedEta);
  });
});

describe("getEtasForShuttleId", () => {
  test("getEtasForShuttleId returns correct ETA data", async () => {
    // Because I'm testing updateEtasForSystemIfTTL separately, force it to hit
    // the cache for the stops

  });

  test("getEtasForShuttleId returns empty array if no data available", async () => {

  });

  test("getEtasForShuttleId returns old data if not expired", async () => {
    updateGlobalFetchMockJson(genericEtaDataByStopId);

    const initialCache: ApiBasedRepositoryCache = {
      etasForStopId: {},
      etasForShuttleId: {
        "5577": [
          {
            secondsRemaining: 587,
            shuttleId: "5577",
            stopId: "177666",
            millisecondsSinceEpoch: Date.now(),
          }
        ]
      },
    };

    const ttls: ApiBasedRepositoryMillisecondTTLs = {
      etasForShuttleId: 100000,
      etasForStopId: 100000,
    };

    const repository = new ApiBasedRepository(initialCache, ttls);
    const result = await repository.getEtasForShuttleId("5577");

    expect(result).toEqual(initialCache.etasForShuttleId);
  });
});

describe("getEtasForStopId", () => {
  test("getEtasForStopId returns correct ETA data", async () => {

  });

  test("getEtasForStopId returns empty array if no data available", async () => {

  });

  test("getEtasForStopId returns old data if not expired", async () => {

  });
});