/**
 * reprocess-bracket rebuilds a bracket's placements from scratch. What it wipes first
 * decides whether the clear-bracket → regenerate → reprocess repair path actually works,
 * and whether it takes the rest of the season's placements down with it.
 */

import { beforeEach, describe, expect, it, vi } from "vitest";
import { findPlayoffMatchesByEventId } from "~/models/playoff-match";
import {
  deleteParticipantResultsBySportsSeasonId,
  deleteParticipantResultsForParticipants,
  setParticipantResult,
} from "~/models/participant-result";
import {
  applyBracketEntryFloors,
  processMatchResult,
  processQualifyingBracketEvent,
  recalculateAffectedLeagues,
} from "~/models/scoring-calculator";
import { getScoringEventById } from "~/models/scoring-event";
import { findParticipantsBySportsSeasonId } from "~/models/season-participant";
import { findSportsSeasonById } from "~/models/sports-season";
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>()),
  findPlayoffMatchesByEventId: vi.fn(),
}));
vi.mock("~/models/participant-result", async (importOriginal) => ({
  ...(await importOriginal<object>()),
  deleteParticipantResultsBySportsSeasonId: vi.fn(),
  deleteParticipantResultsForParticipants: vi.fn(),
  setParticipantResult: vi.fn(),
}));
vi.mock("~/models/scoring-calculator", async (importOriginal) => ({
  ...(await importOriginal<object>()),
  applyBracketEntryFloors: vi.fn(),
  processMatchResult: vi.fn(),
  recalculateAffectedLeagues: vi.fn(),
  processQualifyingBracketEvent: vi.fn(),
  finalizeQualifyingPoints: vi.fn(),
}));
vi.mock("~/models/season-participant", async (importOriginal) => ({
  ...(await importOriginal<object>()),
  findParticipantsBySportsSeasonId: vi.fn(),
}));
vi.mock("~/models/sports-season", async (importOriginal) => ({
  ...(await importOriginal<object>()),
  findSportsSeasonById: vi.fn(),
}));

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

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

function reprocessRequest(): Request {
  const body = new FormData();
  body.set("intent", "reprocess-bracket");
  return new Request("http://localhost/reprocess", { method: "POST", body });
}

/** A seeded, unplayed bracket slot. */
function slot(matchNumber: number, participant1Id: string, participant2Id: string) {
  return {
    id: `m-${matchNumber}`,
    round: "Qualifying Finals",
    matchNumber,
    participant1Id,
    participant2Id,
    winnerId: null,
    loserId: null,
    isComplete: false,
    isScoring: true,
  };
}

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

function setEvent(overrides: Partial<typeof EVENT> = {}) {
  vi.mocked(getScoringEventById).mockResolvedValue(
    { ...EVENT, ...overrides } as unknown as Awaited<ReturnType<typeof getScoringEventById>>
  );
}

function setMatches(matches: ReturnType<typeof slot>[]) {
  vi.mocked(findPlayoffMatchesByEventId).mockResolvedValue(
    matches as unknown as Awaited<ReturnType<typeof findPlayoffMatchesByEventId>>
  );
}

describe("reprocess-bracket", () => {
  beforeEach(() => {
    vi.clearAllMocks();
    setEvent();
    vi.mocked(applyBracketEntryFloors).mockResolvedValue(4);
    vi.mocked(findParticipantsBySportsSeasonId).mockResolvedValue(
      [] as unknown as Awaited<ReturnType<typeof findParticipantsBySportsSeasonId>>
    );
    vi.mocked(setParticipantResult).mockResolvedValue(
      undefined as unknown as Awaited<ReturnType<typeof setParticipantResult>>
    );
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(
      undefined as unknown as Awaited<ReturnType<typeof recalculateAffectedLeagues>>
    );
    vi.mocked(processMatchResult).mockResolvedValue(
      undefined as unknown as Awaited<ReturnType<typeof processMatchResult>>
    );
    vi.mocked(processQualifyingBracketEvent).mockResolvedValue(
      undefined as unknown as Awaited<ReturnType<typeof processQualifyingBracketEvent>>
    );
    vi.mocked(findSportsSeasonById).mockResolvedValue(
      { qualifyingPointsFinalized: false } as unknown as Awaited<
        ReturnType<typeof findSportsSeasonById>
      >
    );
  });

  it("clears placements even when no match has been played", async () => {
    // The clear-bracket → regenerate → reprocess repair path lands here: the freshly
    // re-seeded bracket has nothing completed, yet the discarded bracket's finalized
    // placements are exactly what has to go. Skipping the wipe leaves them permanently,
    // because upsertParticipantResult refuses to un-finalize a result.
    setMatches([slot(1, "p1", "p2"), slot(2, "p3", "p4")]);

    const result = await run(reprocessRequest());

    expect(result.success).toBeDefined();
    expect(deleteParticipantResultsForParticipants).toHaveBeenCalledTimes(1);
    const [sportsSeasonId, ids] = vi.mocked(deleteParticipantResultsForParticipants).mock.calls[0];
    expect(sportsSeasonId).toBe("season-1");
    expect([...ids].toSorted()).toEqual(["p1", "p2", "p3", "p4"]);
  });

  it("scopes the wipe to this bracket, never the whole season", async () => {
    // A season-wide delete would take every other event's placements with it, with only
    // this bracket's replay able to rebuild them.
    setMatches([slot(1, "p1", "p2")]);

    await run(reprocessRequest());

    expect(deleteParticipantResultsBySportsSeasonId).not.toHaveBeenCalled();
    const [, ids] = vi.mocked(deleteParticipantResultsForParticipants).mock.calls[0];
    expect(ids).not.toContain("p3");
  });

  it("passes each participant once when a team appears in more than one slot", async () => {
    setMatches([slot(1, "p1", "p2"), slot(2, "p1", "p3")]);

    await run(reprocessRequest());

    const [, ids] = vi.mocked(deleteParticipantResultsForParticipants).mock.calls[0];
    expect(ids).toHaveLength(3);
    expect([...ids].toSorted()).toEqual(["p1", "p2", "p3"]);
  });

  it("skips empty slots rather than passing nulls through", async () => {
    setMatches([
      { ...slot(1, "p1", "p2"), participant2Id: null as unknown as string },
    ]);

    await run(reprocessRequest());

    const [, ids] = vi.mocked(deleteParticipantResultsForParticipants).mock.calls[0];
    expect(ids).toEqual(["p1"]);
  });

  it("still takes the season-wide delete for a qualifying event", async () => {
    // Qualifying seasons have no legitimate per-major fantasy placements — those come
    // from finalizeQualifyingPoints across all majors — so that path wipes the season
    // on purpose and rebuilds QP from the bracket.
    setEvent({ isQualifyingEvent: true });
    setMatches([slot(1, "p1", "p2")]);

    await run(reprocessRequest());

    expect(deleteParticipantResultsBySportsSeasonId).toHaveBeenCalledWith("season-1", {});
    expect(deleteParticipantResultsForParticipants).not.toHaveBeenCalled();
  });

  it("rejects an event with no bracket rather than wiping anything", async () => {
    setMatches([]);

    const result = await run(reprocessRequest());

    expect(result.error).toContain("No bracket to reprocess");
    expect(deleteParticipantResultsForParticipants).not.toHaveBeenCalled();
    expect(deleteParticipantResultsBySportsSeasonId).not.toHaveBeenCalled();
  });
});