import { beforeEach, describe, expect, it, type Mock, vi } from "vitest"

import { Lang } from "@scandic-hotels/common/constants/language"
import { getCacheClient } from "@scandic-hotels/common/dataCache"

import * as api from "../../../api"
// import { getCity } from "./getCity"
import { getLocationsByCountries } from "./getLocationsByCountries"

import type { CitiesGroupedByCountry } from "../../../types/locations"

// Mocks
vi.mock("@scandic-hotels/common/dataCache", () => {
  return {
    getCacheClient: vi.fn(),
  }
})
vi.mock("../../../api", () => {
  return {
    get: vi.fn(),
    endpoints: {
      v1: {
        Hotel: {
          locations: "/locations",
        },
      },
    },
  }
})
vi.mock("./getCity", () => {
  return {
    getCity: vi.fn(),
  }
})
vi.mock("@scandic-hotels/common/logger/createLogger", () => {
  return {
    createLogger: () => ({
      info: vi.fn(),
      warn: vi.fn(),
      error: vi.fn(),
    }),
  }
})

const mockedGetCacheClient = getCacheClient as unknown as Mock
const mockedApiGet = api.get as unknown as Mock
// const mockedGetCity = getCity as unknown as Mock

describe("getLocationsByCountries", () => {
  const mockedCacheClient = {
    cacheOrGet: vi.fn().mockImplementation(async (_key: string, cb: any) => {
      return cb()
    }),
  }

  beforeEach(() => {
    vi.clearAllMocks()
  })

  it("returns cached value when cache has data", async () => {
    const cacheClient = {
      cacheOrGet: vi.fn().mockResolvedValueOnce("CACHED_VALUE"),
    }
    mockedGetCacheClient.mockResolvedValueOnce(cacheClient)

    const result = await getLocationsByCountries({
      lang: Lang.en,
      citiesByCountry: null,
      serviceToken: "token",
    } as any)

    expect(result).toBe("CACHED_VALUE")
    expect(cacheClient.cacheOrGet).toHaveBeenCalled()
    expect(mockedApiGet).not.toHaveBeenCalled()
  })

  it("throws unauthorized on 401 response", async () => {
    mockedGetCacheClient.mockResolvedValueOnce(mockedCacheClient)

    mockedApiGet.mockResolvedValueOnce({
      ok: false,
      status: 401,
      json: async () => ({}),
    })

    await expect(
      getLocationsByCountries({
        lang: Lang.en,
        citiesByCountry: null,
        serviceToken: "token",
      })
    ).rejects.toThrow("Unauthorized")

    expect(mockedApiGet).toHaveBeenCalled()
  })

  it("throws forbidden on 403 response", async () => {
    mockedGetCacheClient.mockResolvedValueOnce(mockedCacheClient)

    mockedApiGet.mockResolvedValueOnce({
      ok: false,
      status: 403,
      json: async () => ({}),
    })

    await expect(
      getLocationsByCountries({
        lang: Lang.en,
        citiesByCountry: null,
        serviceToken: "token",
      })
    ).rejects.toThrow("Forbidden")
  })

  it("parses locations and enriches city country and hotel city via getCity", async () => {
    mockedGetCacheClient.mockResolvedValueOnce(mockedCacheClient)

    const apiPayload = mockApiData({
      numberOfCities: 1,
      numberOfHotels: 1,
    })

    mockedApiGet.mockResolvedValueOnce({
      ok: true,
      status: 200,
      json: async () => apiPayload,
    })

    const citiesByCountry = {
      CountryX: [{ name: "CityAA" }],
    } as unknown as CitiesGroupedByCountry

    const result = await getLocationsByCountries({
      lang: Lang.en,
      citiesByCountry,
      serviceToken: "token",
    })

    // Result should be an array with two entries
    expect(Array.isArray(result)).toBe(true)
    expect(result).toHaveLength(2)

    const cityNode = result
      .filter((n) => n.type === "cities")
      .find((n) => n.name === "City1")
    const hotelNode = result
      .filter((n) => n.type === "hotels")
      .find((n) => n.name === "Hotel1")

    expect(cityNode).toBeDefined()
    expect(cityNode!.country).toBe("CountryX") // country assigned based on citiesByCountry

    expect(hotelNode).toBeDefined()

    // hotel relationships.city should be the object returned by getCity (merged)
    expect(hotelNode?.relationships).toBeDefined()
    expect(hotelNode?.relationships.city).toEqual(
      expect.objectContaining({
        id: "city1",
        name: "City1",
      })
    )
  })

  it("parses locations and enriches city country and hotel city via getCity", async () => {
    mockedGetCacheClient.mockResolvedValueOnce(mockedCacheClient)

    const apiPayload = mockApiData({
      numberOfCities: 2,
      numberOfHotels: 2,
    })

    mockedApiGet.mockResolvedValueOnce({
      ok: true,
      status: 200,
      json: async () => apiPayload,
    })

    const citiesByCountry = {
      CountryX: [{ name: "CityAA" }],
    } as unknown as CitiesGroupedByCountry

    const result = await getLocationsByCountries({
      lang: Lang.en,
      citiesByCountry,
      serviceToken: "token",
    })

    // Result should be an array with two entries
    expect(Array.isArray(result)).toBe(true)
    expect(result).toHaveLength(4)

    const city1 = result
      .filter((n) => n.type === "cities")
      .find((n) => n.name === "City1")

    expect(city1).toBeDefined()
    expect(city1?.country).toBe("CountryX")

    const hotel1 = result
      .filter((n) => n.type === "hotels")
      .find((n) => n.name === "Hotel1")
    expect(hotel1).toBeDefined()

    // hotel relationships.city should be the object returned by getCity (merged)
    expect(hotel1?.relationships).toBeDefined()
    expect(hotel1?.relationships.city).toEqual(
      expect.objectContaining({
        id: "city1",
        name: "City1",
      })
    )

    const hotel2 = result
      .filter((n) => n.type === "hotels")
      .find((n) => n.name === "Hotel2")
    expect(hotel2).toBeDefined()

    // hotel relationships.city should be the object returned by getCity (merged)
    expect(hotel2?.relationships).toBeDefined()
    expect(hotel2?.relationships.city).toEqual(
      expect.objectContaining({
        id: "city2",
        name: "City2",
      })
    )
  })

  it("filters out unpublished cities", async () => {
    mockedGetCacheClient.mockResolvedValueOnce(mockedCacheClient)

    const apiPayload = mockApiData({
      numberOfCities: 2,
      numberOfHotels: 2,
    })

    apiPayload.data[0].attributes.isPublished = false

    mockedApiGet.mockResolvedValueOnce({
      ok: true,
      status: 200,
      json: async () => apiPayload,
    })

    const citiesByCountry = {
      CountryX: [{ name: "CityAA" }],
    } as unknown as CitiesGroupedByCountry

    const result = await getLocationsByCountries({
      lang: Lang.en,
      citiesByCountry,
      serviceToken: "token",
    })

    // Result should be an array with two entries
    expect(Array.isArray(result)).toBe(true)
    expect(result).toHaveLength(3)

    const city1 = result
      .filter((n) => n.type === "cities")
      .find((n) => n.name === "City1")

    expect(city1).toBeUndefined()

    const hotel1 = result
      .filter((n) => n.type === "hotels")
      .find((n) => n.name === "Hotel1")
    expect(hotel1).toBeDefined()

    const hotel2 = result
      .filter((n) => n.type === "hotels")
      .find((n) => n.name === "Hotel2")
    expect(hotel2).toBeDefined()
  })

  it("sorts the result with cities first", async () => {
    mockedGetCacheClient.mockResolvedValueOnce(mockedCacheClient)

    const apiPayload = mockApiData({
      numberOfCities: 9,
      numberOfHotels: 9,
    })
    apiPayload.data = apiPayload.data.sort(() => Math.random() - 0.5) // shuffle
    mockedApiGet.mockResolvedValueOnce({
      ok: true,
      status: 200,
      json: async () => apiPayload,
    })

    const citiesByCountry = {
      CountryX: [{ name: "CityAA" }],
    } as unknown as CitiesGroupedByCountry

    const result = await getLocationsByCountries({
      lang: Lang.en,
      citiesByCountry,
      serviceToken: "token",
    })

    expect(result.at(0)?.type).toBe("cities")
    expect(result.at(-1)?.type).toBe("hotels")

    expect(result[0].type === "cities" ? result[0].name : undefined).toBe(
      "City1"
    )
    expect(result[1].type === "cities" ? result[1].name : undefined).toBe(
      "City2"
    )

    expect(result[9].type === "hotels" ? result[9].name : undefined).toBe(
      "Hotel1"
    )
    expect(result[10].type === "hotels" ? result[10].name : undefined).toBe(
      "Hotel2"
    )
  })
})

function mockApiData({
  numberOfCities,
  numberOfHotels,
}: {
  numberOfCities: number
  numberOfHotels: number
}) {
  const cities = Array.from({ length: numberOfCities }, (_, i) => ({
    id: `city${i + 1}`,
    type: "cities" as const,
    attributes: {
      name: `City${i + 1}`,
      countryName: `CountryX`,
      cityIdentifier: `ci-${i + 1}`,
      isPublished: true,
    },
  }))

  const hotels = Array.from({ length: numberOfHotels }, (_, i) => ({
    id: `hotel${i + 1}`,
    type: "hotels" as const,
    attributes: {
      isActive: true,
      name: `Hotel${i + 1}`,
      operaId: `op-${i + 1}`,
      isPublished: true,
    },
    relationships: {
      city: {
        links: {
          related: `https://api/cities/city${i + 1}`,
        },
      },
    },
  }))

  const apiPayload = {
    data: [...cities, ...hotels],
  }

  return apiPayload
}