import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
import { EplStandingsAdapter } from "../epl";

const SAMPLE_RESPONSE = {
  standings: [
    {
      type: "TOTAL",
      table: [
        {
          position: 1,
          team: { id: 57, name: "Arsenal FC" },
          playedGames: 30,
          form: "W,W,D,W,L",
          won: 21,
          draw: 6,
          lost: 3,
          points: 69,
          goalsFor: 72,
          goalsAgainst: 25,
          goalDifference: 47,
        },
        {
          position: 2,
          team: { id: 65, name: "Manchester City FC" },
          playedGames: 30,
          form: "W,W,W,D,W",
          won: 20,
          draw: 7,
          lost: 3,
          points: 67,
          goalsFor: 70,
          goalsAgainst: 28,
          goalDifference: 42,
        },
      ],
    },
    { type: "HOME", table: [] },
  ],
};

describe("EplStandingsAdapter", () => {
  beforeEach(() => {
    vi.stubGlobal("fetch", vi.fn());
  });

  afterEach(() => {
    vi.restoreAllMocks();
  });

  it("maps football-data.org TOTAL standings to FetchedStandingsRecord[]", async () => {
    vi.mocked(fetch).mockResolvedValueOnce({
      ok: true,
      json: async () => SAMPLE_RESPONSE,
    } as Response);

    const records = await new EplStandingsAdapter("test-token").fetchStandings();
    expect(records).toHaveLength(2);

    const arsenal = records[0];
    expect(arsenal.teamName).toBe("Arsenal FC");
    expect(arsenal.externalTeamId).toBe("57");
    expect(arsenal.wins).toBe(21);
    expect(arsenal.ties).toBe(6);
    expect(arsenal.losses).toBe(3);
    expect(arsenal.gamesPlayed).toBe(30);
    expect(arsenal.tablePoints).toBe(69);
    expect(arsenal.goalsFor).toBe(72);
    expect(arsenal.goalsAgainst).toBe(25);
    expect(arsenal.goalDifference).toBe(47);
    expect(arsenal.leagueRank).toBe(1);
    expect(arsenal.lastTen).toBe("W,W,D,W,L");
  });

  it("sends the football-data.org auth token", async () => {
    vi.mocked(fetch).mockResolvedValueOnce({
      ok: true,
      json: async () => SAMPLE_RESPONSE,
    } as Response);

    await new EplStandingsAdapter("abc123").fetchStandings();
    expect(fetch).toHaveBeenCalledWith(
      "https://api.football-data.org/v4/competitions/PL/standings",
      { headers: { "X-Auth-Token": "abc123" } }
    );
  });

  it("throws when no API key is configured", async () => {
    await expect(new EplStandingsAdapter("").fetchStandings()).rejects.toThrow(/FOOTBALL_DATA_API_KEY/);
  });

  it("throws on non-ok response", async () => {
    vi.mocked(fetch).mockResolvedValueOnce({
      ok: false,
      status: 429,
      statusText: "Too Many Requests",
    } as Response);

    await expect(new EplStandingsAdapter("test-token").fetchStandings()).rejects.toThrow("429");
  });
});