/**
 * generate-bracket banks the floors a seeding guarantees before anyone plays (an AFL
 * top-4 seed cannot finish below the 5th-6th tier). Those floors only reach
 * teamStandings.totalPoints through a standings recalculation, so the action has to be
 * sure one ran — markEliminatedAndAnnounce runs one for its Discord announcement in some
 * cases but not others.
 */

import { beforeEach, describe, expect, it, vi } from "vitest";
import { generateBracketFromTemplate } from "~/models/playoff-match";
import {
  findParticipantResultsBySportsSeasonId,
  setParticipantResult,
} from "~/models/participant-result";
import {
  applyBracketEntryFloors,
  recalculateAffectedLeagues,
} from "~/models/scoring-calculator";
import { getScoringEventById, updateScoringEvent } from "~/models/scoring-event";
import { findParticipantsBySportsSeasonId } from "~/models/season-participant";
import { action } from "../admin.sports-seasons.$id.events.$eventId.bracket.server";

vi.mock("~/database/context", () => ({ database: vi.fn(() => ({})) }));
vi.mock("~/models/scoring-event", async (importOriginal) => ({
  ...(await importOriginal<object>()),
  getScoringEventById: vi.fn(),
  updateScoringEvent: vi.fn(),
  isReadOnlySibling: vi.fn(() => false),
}));
vi.mock("~/models/playoff-match", async (importOriginal) => ({
  ...(await importOriginal<object>()),
  generateBracketFromTemplate: vi.fn(),
}));
vi.mock("~/models/participant-result", async (importOriginal) => ({
  ...(await importOriginal<object>()),
  findParticipantResultsBySportsSeasonId: vi.fn(),
  setParticipantResult: vi.fn(),
}));
vi.mock("~/models/scoring-calculator", async (importOriginal) => ({
  ...(await importOriginal<object>()),
  applyBracketEntryFloors: vi.fn(),
  recalculateAffectedLeagues: vi.fn(),
}));
vi.mock("~/models/season-participant", async (importOriginal) => ({
  ...(await importOriginal<object>()),
  findParticipantsBySportsSeasonId: vi.fn(),
}));

const params = { id: "season-1", eventId: "event-1" };

const EVENT = {
  id: "event-1",
  name: "AFL Finals",
  sportsSeasonId: "season-1",
  isQualifyingEvent: false,
  bracketTemplateId: "afl_10",
};

/** afl_10 takes exactly 10 seeded participants. */
const SEEDED = Array.from({ length: 10 }, (_, i) => `seed-${i + 1}`);

function generateRequest(): Request {
  const body = new FormData();
  body.set("intent", "generate-bracket");
  body.set("templateId", "afl_10");
  SEEDED.forEach((id, i) => body.set(`participant${i}`, id));
  return new Request("http://localhost/generate", { method: "POST", body });
}

const run = (request: Request) =>
  (action as unknown as (args: { request: Request; params: typeof params }) => Promise<{
    error?: string;
    success?: string;
  }>)({ request, params });

/**
 * @param extras participants in the season beyond the 10 seeded into the bracket —
 *   these are the ones generate-bracket marks eliminated.
 * @param withExistingResults ids that already carry a result row, so
 *   markEliminatedAndAnnounce treats them as not newly eliminated.
 */
function setSeason(extras: string[], withExistingResults: string[] = []) {
  vi.mocked(findParticipantsBySportsSeasonId).mockResolvedValue(
    [...SEEDED, ...extras].map((id) => ({ id })) as unknown as Awaited<
      ReturnType<typeof findParticipantsBySportsSeasonId>
    >
  );
  vi.mocked(findParticipantResultsBySportsSeasonId).mockResolvedValue(
    withExistingResults.map((participantId) => ({ participantId })) as unknown as Awaited<
      ReturnType<typeof findParticipantResultsBySportsSeasonId>
    >
  );
}

describe("generate-bracket entry-floor standings recalculation", () => {
  beforeEach(() => {
    vi.clearAllMocks();
    vi.mocked(getScoringEventById).mockResolvedValue(
      EVENT as unknown as Awaited<ReturnType<typeof getScoringEventById>>
    );
    vi.mocked(generateBracketFromTemplate).mockResolvedValue(
      undefined as unknown as Awaited<ReturnType<typeof generateBracketFromTemplate>>
    );
    vi.mocked(updateScoringEvent).mockResolvedValue(
      undefined as unknown as Awaited<ReturnType<typeof updateScoringEvent>>
    );
    vi.mocked(setParticipantResult).mockResolvedValue(
      undefined as unknown as Awaited<ReturnType<typeof setParticipantResult>>
    );
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(
      undefined as unknown as Awaited<ReturnType<typeof recalculateAffectedLeagues>>
    );
    // afl_10 seeds 1-4 into the Qualifying Finals, whose entry floor is the 5th-6th tier.
    vi.mocked(applyBracketEntryFloors).mockResolvedValue(4);
  });

  it("recalculates when every eliminated team already had a result row", async () => {
    // The second run of a generation: the first wrote position 0 for the non-bracket
    // participants, so nobody is *newly* eliminated and the announcement is skipped.
    // The floors banked moments ago would never reach the standings.
    setSeason(["extra-1"], ["extra-1"]);

    const result = await run(generateRequest());

    expect(result.success).toBeDefined();
    expect(recalculateAffectedLeagues).toHaveBeenCalledTimes(1);
    expect(recalculateAffectedLeagues).toHaveBeenCalledWith(
      "season-1",
      expect.anything(),
      expect.objectContaining({ skipDiscord: true })
    );
  });

  it("recalculates for a qualifying event, which never announces eliminations", async () => {
    vi.mocked(getScoringEventById).mockResolvedValue(
      { ...EVENT, isQualifyingEvent: true } as unknown as Awaited<
        ReturnType<typeof getScoringEventById>
      >
    );
    setSeason(["extra-1"]);

    await run(generateRequest());

    expect(recalculateAffectedLeagues).toHaveBeenCalledTimes(1);
    expect(recalculateAffectedLeagues).toHaveBeenCalledWith(
      "season-1",
      expect.anything(),
      expect.objectContaining({ skipDiscord: true })
    );
  });

  it("recalculates when the bracket field is the whole season", async () => {
    setSeason([]);

    await run(generateRequest());

    expect(recalculateAffectedLeagues).toHaveBeenCalledTimes(1);
  });

  it("recalculates when the elimination announcement threw", async () => {
    // The announcement is best-effort and its failure is swallowed — but a failed recalc
    // is exactly when the floors still need one.
    setSeason(["extra-1"]);
    vi.mocked(recalculateAffectedLeagues)
      .mockRejectedValueOnce(new Error("discord down"))
      .mockResolvedValue(undefined as unknown as Awaited<ReturnType<typeof recalculateAffectedLeagues>>);

    const result = await run(generateRequest());

    expect(result.success).toBeDefined();
    expect(recalculateAffectedLeagues).toHaveBeenCalledTimes(2);
    expect(recalculateAffectedLeagues).toHaveBeenLastCalledWith(
      "season-1",
      expect.anything(),
      expect.objectContaining({ skipDiscord: true })
    );
  });

  it("does not recalculate twice when the announcement already did", async () => {
    setSeason(["extra-1"]);

    await run(generateRequest());

    expect(recalculateAffectedLeagues).toHaveBeenCalledTimes(1);
    // The announcing call, not the floor fallback.
    expect(recalculateAffectedLeagues).toHaveBeenCalledWith(
      "season-1",
      expect.anything(),
      expect.objectContaining({ eliminatedParticipantIds: ["extra-1"] })
    );
  });

  it("does not recalculate at all when no floors were banked", async () => {
    // A template that guarantees nothing at seeding: no floors, nobody to eliminate,
    // so there is nothing for a recalculation to pick up.
    vi.mocked(applyBracketEntryFloors).mockResolvedValue(0);
    setSeason([]);

    await run(generateRequest());

    expect(recalculateAffectedLeagues).not.toHaveBeenCalled();
  });
});