import { describe, it, expect, vi, beforeEach } from "vitest";
import type { Mock } from "vitest";
import type * as DrizzleOrm from "drizzle-orm";
import type * as ScoringCalculatorModule from "~/models/scoring-calculator";

vi.mock("~/database/context", () => ({
  database: vi.fn(),
}));

vi.mock("~/models/scoring-calculator", async () => {
  // Keep the real implementations of the PURE helpers so the tie-count map handed
  // to processQualifyingEvent reflects the mock canonical results AND the bracket's
  // structural tie span (deriveBracketQualifyingStates / getRoundConfig). Only the
  // DB-touching orchestrators are stubbed.
  const actual = await vi.importActual<typeof ScoringCalculatorModule>(
    "~/models/scoring-calculator"
  );
  return {
    processQualifyingEvent: vi.fn(),
    recalculateAffectedLeagues: vi.fn(),
    buildTieCountByPlacement: actual.buildTieCountByPlacement,
    deriveBracketQualifyingStates: actual.deriveBracketQualifyingStates,
    getRoundConfig: actual.getRoundConfig,
  };
});

vi.mock("~/models/scoring-event", () => ({
  completeScoringEvent: vi.fn(),
  getScoringEventById: vi.fn(),
}));

vi.mock("~/models/event-result", () => ({
  getEventResults: vi.fn(),
}));

vi.mock("~/models/tournament-result", () => ({
  upsertTournamentResult: vi.fn(),
}));

vi.mock("~/lib/logger", () => ({
  logger: { log: vi.fn(), warn: vi.fn(), error: vi.fn() },
}));

import {
  syncTournamentResults,
  syncMajorFromPrimaryEvent,
} from "../sync-tournament-results";
import { database } from "~/database/context";
import {
  processQualifyingEvent,
  recalculateAffectedLeagues,
} from "~/models/scoring-calculator";
import { completeScoringEvent, getScoringEventById } from "~/models/scoring-event";
import { getEventResults } from "~/models/event-result";
import { upsertTournamentResult } from "~/models/tournament-result";

// ---------------------------------------------------------------------------
// Mock data types
// ---------------------------------------------------------------------------

interface FakeTournamentResult {
  tournamentId: string;
  participantId: string;
  placement: number | null;
  rawScore: string | null;
}

interface FakeScoringEvent {
  id: string;
  sportsSeasonId: string;
  tournamentId: string | null;
  name?: string | null;
}

interface FakeSeasonParticipant {
  id: string;
  sportsSeasonId: string;
  participantId: string | null;
  name: string;
}

interface FakeEventResult {
  id: string;
  scoringEventId: string;
  seasonParticipantId: string;
  placement: number | null;
  qualifyingPointsAwarded: string | null;
  rawScore: string | null;
}

// ---------------------------------------------------------------------------
// Fake in-memory DB
//
// We build a single shared object with a chainable select/insert/update API
// that the service uses identically whether it's the top-level `db` or the
// `tx` inside a transaction. This lets us both observe the writes that would
// have happened and emulate idempotent upserts.
//
// Internal state holds the three tables the service queries:
//   - tournament_results
//   - scoring_events
//   - season_participants
//   - event_results
// ---------------------------------------------------------------------------

interface FakePlayoffMatch {
  scoringEventId: string;
  round: string;
  winnerId: string | null;
  loserId: string | null;
  participant1Id: string | null;
  participant2Id: string | null;
}

interface FakeDbState {
  tournamentResults: FakeTournamentResult[];
  scoringEvents: FakeScoringEvent[];
  seasonParticipants: FakeSeasonParticipant[];
  eventResults: FakeEventResult[];
  playoffMatches: FakePlayoffMatch[];
}

/**
 * A very thin fake drizzle-ish db. The service only uses:
 *   - db.select().from(table).where(cond)            -- returns rows
 *   - db.insert(table).values(row[|rows])            -- insert
 *   - db.update(table).set(...).where(cond)          -- update
 *   - db.transaction(fn)                             -- runs fn with the same db
 *
 * We identify the target table by reference equality to the schema objects.
 * The service passes schema.tournamentResults etc., so we capture the real
 * schema module and compare by ref.
 */

// eslint-disable-next-line @typescript-eslint/no-explicit-any
function tableName(table: any): string {
  // drizzle-orm PgTable exposes the table name under a symbol. Try a few.
  const sym = Object.getOwnPropertySymbols(table).find(
    (s) => s.toString() === "Symbol(drizzle:Name)"
  );
  if (sym) return table[sym];
  // Fallback for our shim: read `.tableName` property if set.
  return table.tableName;
}

function makeFakeDb(state: FakeDbState) {
  // We mirror the shape in a lazy way: each predicate function is stored on the
  // call so we can match rows. In practice the service only filters by simple
  // eq() / and() combinations — we don't try to parse drizzle's SQL tree.
  // Instead, we stash the filters the service applies by table.
  //
  // The simpler and more faithful approach: every call records enough info for
  // us to return the right subset.

  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  function rowsFor(table: any): any[] {
    // Table objects are drizzle PgTable objects; we identify them by name.
    const name = tableName(table);
    switch (name) {
      case "tournament_results":
        return state.tournamentResults;
      case "scoring_events":
        return state.scoringEvents;
      case "season_participants":
        return state.seasonParticipants;
      case "event_results":
        return state.eventResults;
      case "playoff_matches":
        return state.playoffMatches;
      default:
        throw new Error(`Unknown table in fake db: ${name}`);
    }
  }

  const db = {
    // ---------- select ----------
    select: vi.fn().mockImplementation(() => {
      const chain = {
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        _table: null as any,
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        from(table: any) {
          chain._table = table;
          return chain;
        },
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        where(predicate: any) {
          // The predicate is a drizzle SQL expression; we can't introspect it
          // easily. The fake predicate stash sets a callback (see below). If
          // the predicate is a function we apply it; otherwise we return all
          // rows for the table (the caller will then filter).
          const rows = rowsFor(chain._table);
          if (typeof predicate === "function") {
            return Promise.resolve(rows.filter(predicate));
          }
          // Unknown predicate: the test harness attaches `__fakeFilter` to the
          // predicate value we interposed. When we can't evaluate, just return
          // all rows — the fake is used only by the service and tests that
          // control what rows exist.
          return Promise.resolve(rows);
        },
      };
      return chain;
    }),

    // ---------- insert ----------
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    insert: vi.fn().mockImplementation((table: any) => {
      return {
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        values(row: any) {
          const rows = Array.isArray(row) ? row : [row];
          const existing = rowsFor(table);
          for (const r of rows) {
            // Assign a fake id for event_results (others aren't re-read by ID).
            existing.push({ id: `er-${existing.length + 1}`, ...r });
          }
          return {
            returning: vi.fn().mockResolvedValue(rows),
          };
        },
      };
    }),

    // ---------- update ----------
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    update: vi.fn().mockImplementation((table: any) => {
      return {
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        set(patch: any) {
          return {
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            where(predicate: any) {
              const rows = rowsFor(table);
              for (const r of rows) {
                if (typeof predicate === "function" ? predicate(r) : true) {
                  Object.assign(r, patch);
                }
              }
              return Promise.resolve();
            },
          };
        },
      };
    }),

    // ---------- transaction ----------
    transaction: vi
      .fn()
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      .mockImplementation(async (fn: (tx: any) => any) => fn(db)),
  };

  return db;
}

// ---------------------------------------------------------------------------
// The service builds drizzle SQL expressions via eq() / and() from
// drizzle-orm. We can't intercept those without re-mocking the whole module.
// Instead we mock drizzle-orm's eq/and to return predicate functions directly.
// ---------------------------------------------------------------------------

vi.mock("drizzle-orm", async () => {
  const actual = await vi.importActual<typeof DrizzleOrm>("drizzle-orm");
  return {
    ...actual,
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    eq: (col: any, val: any) => {
      // Each column object (PgColumn) has a `.name` property giving the DB
      // column name. Return a predicate that reads that key off the row.
      const key = colKey(col);
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      return (row: any) => row[key] === val;
    },
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    and: (...preds: any[]) => (row: any) => preds.every((p) => p(row)),
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    inArray: (col: any, vals: any[]) => {
      const key = colKey(col);
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      return (row: any) => vals.includes(row[key]);
    },
  };
});

// eslint-disable-next-line @typescript-eslint/no-explicit-any
function colKey(col: any): string {
  // drizzle PgColumn: its .name is the snake_case DB name, but our fake state
  // uses camelCase JS field names. Map common columns manually.
  const n = col?.name ?? col?.config?.name ?? "";
  const map: Record<string, string> = {
    tournament_id: "tournamentId",
    sports_season_id: "sportsSeasonId",
    scoring_event_id: "scoringEventId",
    season_participant_id: "seasonParticipantId",
    participant_id: "participantId",
    id: "id",
  };
  return map[n] ?? n;
}

// ---------------------------------------------------------------------------
// Helpers for building fixture data
// ---------------------------------------------------------------------------

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

function seedBasicState(overrides: Partial<FakeDbState> = {}): FakeDbState {
  return {
    tournamentResults: [],
    scoringEvents: [],
    seasonParticipants: [],
    eventResults: [],
    playoffMatches: [],
    ...overrides,
  };
}

// ---------------------------------------------------------------------------
// Test 1: Single window, full roster match
// ---------------------------------------------------------------------------

describe("syncTournamentResults", () => {
  it("syncs a single window with two canonical results and fills 0-QP for unmatched", async () => {
    const state = seedBasicState({
      tournamentResults: [
        {
          tournamentId: "t-1",
          participantId: "cp-A",
          placement: 1,
          rawScore: "280",
        },
        {
          tournamentId: "t-1",
          participantId: "cp-B",
          placement: 2,
          rawScore: "282",
        },
      ],
      scoringEvents: [
        { id: "ev-1", sportsSeasonId: "ss-1", tournamentId: "t-1" },
      ],
      seasonParticipants: [
        {
          id: "sp-A",
          sportsSeasonId: "ss-1",
          participantId: "cp-A",
          name: "A",
        },
        {
          id: "sp-B",
          sportsSeasonId: "ss-1",
          participantId: "cp-B",
          name: "B",
        },
        {
          id: "sp-C",
          sportsSeasonId: "ss-1",
          participantId: "cp-C",
          name: "C",
        },
      ],
    });

    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);

    const report = await syncTournamentResults("t-1");

    expect(report.windowsSynced).toBe(1);
    expect(report.windowsFailed).toBe(0);
    expect(report.failures).toEqual([]);

    const eventRows = state.eventResults.filter(
      (r) => r.scoringEventId === "ev-1"
    );
    // sp-A: placement 1, sp-B: placement 2, sp-C: 0-QP filler
    expect(eventRows).toHaveLength(3);

    const a = eventRows.find((r) => r.seasonParticipantId === "sp-A");
    expect(a?.placement).toBe(1);
    expect(a?.rawScore).toBe("280");

    const b = eventRows.find((r) => r.seasonParticipantId === "sp-B");
    expect(b?.placement).toBe(2);
    expect(b?.rawScore).toBe("282");

    const c = eventRows.find((r) => r.seasonParticipantId === "sp-C");
    expect(c?.placement).toBeNull();
    expect(c?.qualifyingPointsAwarded).toBe("0");

    expect(processQualifyingEvent).toHaveBeenCalledTimes(1);
    expect(processQualifyingEvent).toHaveBeenCalledWith("ev-1", db, {
      skipNotifications: false,
      canonicalTieCountByPlacement: expect.any(Map),
    });
  });

  // -------------------------------------------------------------------------
  // Test 2: Two overlapping windows — same tournament, different sports_seasons
  // -------------------------------------------------------------------------

  it("fans out to multiple windows, each getting only its own participants", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-X", placement: 1, rawScore: null },
        { tournamentId: "t-1", participantId: "cp-Y", placement: 2, rawScore: null },
        { tournamentId: "t-1", participantId: "cp-Z", placement: 3, rawScore: null },
      ],
      scoringEvents: [
        { id: "ev-A", sportsSeasonId: "ss-A", tournamentId: "t-1" },
        { id: "ev-B", sportsSeasonId: "ss-B", tournamentId: "t-1" },
      ],
      seasonParticipants: [
        // Window A has X, Y
        { id: "sp-AX", sportsSeasonId: "ss-A", participantId: "cp-X", name: "X" },
        { id: "sp-AY", sportsSeasonId: "ss-A", participantId: "cp-Y", name: "Y" },
        // Window B has Y, Z
        { id: "sp-BY", sportsSeasonId: "ss-B", participantId: "cp-Y", name: "Y" },
        { id: "sp-BZ", sportsSeasonId: "ss-B", participantId: "cp-Z", name: "Z" },
      ],
    });

    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);

    const report = await syncTournamentResults("t-1");

    expect(report.windowsSynced).toBe(2);
    expect(report.windowsFailed).toBe(0);

    const aRows = state.eventResults.filter((r) => r.scoringEventId === "ev-A");
    const bRows = state.eventResults.filter((r) => r.scoringEventId === "ev-B");

    // Window A: sp-AX (placement 1), sp-AY (placement 2). No 0-QP fillers
    // since both roster members got results.
    expect(aRows).toHaveLength(2);
    expect(aRows.find((r) => r.seasonParticipantId === "sp-AX")?.placement).toBe(1);
    expect(aRows.find((r) => r.seasonParticipantId === "sp-AY")?.placement).toBe(2);

    // Window B: sp-BY (placement 2), sp-BZ (placement 3). Again no fillers.
    expect(bRows).toHaveLength(2);
    expect(bRows.find((r) => r.seasonParticipantId === "sp-BY")?.placement).toBe(2);
    expect(bRows.find((r) => r.seasonParticipantId === "sp-BZ")?.placement).toBe(3);

    expect(processQualifyingEvent).toHaveBeenCalledTimes(2);
    expect(processQualifyingEvent).toHaveBeenNthCalledWith(1, "ev-A", db, {
      skipNotifications: false,
      canonicalTieCountByPlacement: expect.any(Map),
    });
    expect(processQualifyingEvent).toHaveBeenNthCalledWith(2, "ev-B", db, {
      skipNotifications: false,
      canonicalTieCountByPlacement: expect.any(Map),
    });
  });

  // -------------------------------------------------------------------------
  // Test 3: Idempotent re-run
  // -------------------------------------------------------------------------

  it("is idempotent: a second run leaves the same end state", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: "10" },
      ],
      scoringEvents: [
        { id: "ev-1", sportsSeasonId: "ss-1", tournamentId: "t-1" },
      ],
      seasonParticipants: [
        { id: "sp-A", sportsSeasonId: "ss-1", participantId: "cp-A", name: "A" },
        { id: "sp-B", sportsSeasonId: "ss-1", participantId: "cp-B", name: "B" },
      ],
    });

    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);

    await syncTournamentResults("t-1");
    const afterFirst = JSON.parse(JSON.stringify(state.eventResults));

    await syncTournamentResults("t-1");
    const afterSecond = state.eventResults;

    // Same row count, same per-row placement / QP / participant / event.
    expect(afterSecond).toHaveLength(afterFirst.length);
    for (const first of afterFirst) {
      const match = afterSecond.find(
        (r) =>
          r.scoringEventId === first.scoringEventId &&
          r.seasonParticipantId === first.seasonParticipantId
      );
      expect(match).toBeDefined();
      expect(match?.placement).toBe(first.placement);
      expect(match?.qualifyingPointsAwarded).toBe(first.qualifyingPointsAwarded);
      expect(match?.rawScore).toBe(first.rawScore);
    }
  });

  // -------------------------------------------------------------------------
  // Test 4: Correction propagation
  // -------------------------------------------------------------------------

  it("propagates canonical placement corrections to all linked windows", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: null },
      ],
      scoringEvents: [
        { id: "ev-A", sportsSeasonId: "ss-A", tournamentId: "t-1" },
        { id: "ev-B", sportsSeasonId: "ss-B", tournamentId: "t-1" },
      ],
      seasonParticipants: [
        { id: "sp-AA", sportsSeasonId: "ss-A", participantId: "cp-A", name: "A" },
        { id: "sp-BA", sportsSeasonId: "ss-B", participantId: "cp-A", name: "A" },
      ],
    });

    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);

    await syncTournamentResults("t-1");

    // Sanity — both windows have sp-* at placement 1.
    expect(
      state.eventResults.find((r) => r.seasonParticipantId === "sp-AA")?.placement
    ).toBe(1);
    expect(
      state.eventResults.find((r) => r.seasonParticipantId === "sp-BA")?.placement
    ).toBe(1);

    // Correct the canonical placement from 1 to 5.
    state.tournamentResults[0].placement = 5;
    state.tournamentResults[0].rawScore = "99";

    await syncTournamentResults("t-1");

    expect(
      state.eventResults.find((r) => r.seasonParticipantId === "sp-AA")?.placement
    ).toBe(5);
    expect(
      state.eventResults.find((r) => r.seasonParticipantId === "sp-AA")?.rawScore
    ).toBe("99");
    expect(
      state.eventResults.find((r) => r.seasonParticipantId === "sp-BA")?.placement
    ).toBe(5);
    expect(
      state.eventResults.find((r) => r.seasonParticipantId === "sp-BA")?.rawScore
    ).toBe("99");
  });

  // -------------------------------------------------------------------------
  // Test 5: Partial failure isolation
  // -------------------------------------------------------------------------

  it("isolates failures: one window's error does not stop the others", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: null },
      ],
      scoringEvents: [
        { id: "ev-A", sportsSeasonId: "ss-A", tournamentId: "t-1" },
        { id: "ev-B", sportsSeasonId: "ss-B", tournamentId: "t-1" },
      ],
      seasonParticipants: [
        { id: "sp-AA", sportsSeasonId: "ss-A", participantId: "cp-A", name: "A" },
        { id: "sp-BA", sportsSeasonId: "ss-B", participantId: "cp-A", name: "A" },
      ],
    });

    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);

    // First window throws in processQualifyingEvent; second succeeds.
    vi.mocked(processQualifyingEvent)
      .mockImplementationOnce(async () => {
        throw new Error("QP calc failed");
      })
      .mockImplementationOnce(async () => undefined);

    const report = await syncTournamentResults("t-1");

    expect(report.windowsSynced).toBe(1);
    expect(report.windowsFailed).toBe(1);
    expect(report.failures).toHaveLength(1);
    expect(report.failures[0].scoringEventId).toBe("ev-A");
    expect(report.failures[0].sportsSeasonId).toBe("ss-A");
    expect(report.failures[0].error).toContain("QP calc failed");

    // Second window (ev-B) still has its row committed in our fake (we don't
    // simulate rollback, but the service called through to the writes path,
    // which is what we care about — the try/catch did not propagate).
    expect(
      state.eventResults.find(
        (r) => r.scoringEventId === "ev-B" && r.seasonParticipantId === "sp-BA"
      )
    ).toBeDefined();

    expect(processQualifyingEvent).toHaveBeenCalledTimes(2);
  });

  // -------------------------------------------------------------------------
  // Test 6: Participant in roster but not in canonical results → 0-QP filler
  // -------------------------------------------------------------------------

  it("writes 0-QP filler rows for roster participants absent from canonical results", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: null },
      ],
      scoringEvents: [
        { id: "ev-1", sportsSeasonId: "ss-1", tournamentId: "t-1" },
      ],
      seasonParticipants: [
        { id: "sp-A", sportsSeasonId: "ss-1", participantId: "cp-A", name: "A" },
        { id: "sp-B", sportsSeasonId: "ss-1", participantId: "cp-B", name: "B" },
        { id: "sp-C", sportsSeasonId: "ss-1", participantId: "cp-C", name: "C" },
      ],
    });

    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);

    await syncTournamentResults("t-1");

    const rows = state.eventResults;
    expect(rows).toHaveLength(3);

    const a = rows.find((r) => r.seasonParticipantId === "sp-A");
    expect(a?.placement).toBe(1);
    expect(a?.qualifyingPointsAwarded).toBeUndefined(); // not set by this service

    const b = rows.find((r) => r.seasonParticipantId === "sp-B");
    expect(b?.placement).toBeNull();
    expect(b?.qualifyingPointsAwarded).toBe("0");

    const c = rows.find((r) => r.seasonParticipantId === "sp-C");
    expect(c?.placement).toBeNull();
    expect(c?.qualifyingPointsAwarded).toBe("0");
  });

  // -------------------------------------------------------------------------
  // Test 7: Completion fan-out (the core "score once" fix)
  // -------------------------------------------------------------------------

  it("marks each synced window complete by default", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: null },
      ],
      scoringEvents: [
        { id: "ev-A", sportsSeasonId: "ss-A", tournamentId: "t-1" },
        { id: "ev-B", sportsSeasonId: "ss-B", tournamentId: "t-1" },
      ],
      seasonParticipants: [
        { id: "sp-AA", sportsSeasonId: "ss-A", participantId: "cp-A", name: "A" },
        { id: "sp-BA", sportsSeasonId: "ss-B", participantId: "cp-A", name: "A" },
      ],
    });
    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);
    vi.mocked(completeScoringEvent).mockResolvedValue(undefined as never);
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(undefined);

    await syncTournamentResults("t-1");

    expect(completeScoringEvent).toHaveBeenCalledTimes(2);
    expect(completeScoringEvent).toHaveBeenCalledWith("ev-A", db);
    expect(completeScoringEvent).toHaveBeenCalledWith("ev-B", db);
  });

  it("does NOT mark windows complete when markComplete is false", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: null },
      ],
      scoringEvents: [{ id: "ev-A", sportsSeasonId: "ss-A", tournamentId: "t-1" }],
      seasonParticipants: [
        { id: "sp-AA", sportsSeasonId: "ss-A", participantId: "cp-A", name: "A" },
      ],
    });
    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(undefined);

    await syncTournamentResults("t-1", { markComplete: false });

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

  // -------------------------------------------------------------------------
  // Test 8: League recalculation per synced window
  // -------------------------------------------------------------------------

  it("recalculates affected leagues once per cleanly-synced window", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: null },
      ],
      scoringEvents: [
        { id: "ev-A", sportsSeasonId: "ss-A", tournamentId: "t-1", name: "Major A" },
        { id: "ev-B", sportsSeasonId: "ss-B", tournamentId: "t-1", name: "Major B" },
      ],
      seasonParticipants: [
        { id: "sp-AA", sportsSeasonId: "ss-A", participantId: "cp-A", name: "A" },
        { id: "sp-BA", sportsSeasonId: "ss-B", participantId: "cp-A", name: "A" },
      ],
    });
    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);
    vi.mocked(completeScoringEvent).mockResolvedValue(undefined as never);
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(undefined);

    await syncTournamentResults("t-1");

    expect(recalculateAffectedLeagues).toHaveBeenCalledTimes(2);
    expect(recalculateAffectedLeagues).toHaveBeenCalledWith("ss-A", undefined, {
      eventId: "ev-A",
      eventName: "Major A",
      skipDiscord: false,
    });
    expect(recalculateAffectedLeagues).toHaveBeenCalledWith("ss-B", undefined, {
      eventId: "ev-B",
      eventName: "Major B",
      skipDiscord: false,
    });
  });

  // -------------------------------------------------------------------------
  // Test 9: skipEventId excludes the primary window
  // -------------------------------------------------------------------------

  it("skips the primary window when skipEventId is given", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: null },
      ],
      scoringEvents: [
        { id: "ev-PRIMARY", sportsSeasonId: "ss-P", tournamentId: "t-1" },
        { id: "ev-SIBLING", sportsSeasonId: "ss-S", tournamentId: "t-1" },
      ],
      seasonParticipants: [
        { id: "sp-PA", sportsSeasonId: "ss-P", participantId: "cp-A", name: "A" },
        { id: "sp-SA", sportsSeasonId: "ss-S", participantId: "cp-A", name: "A" },
      ],
    });
    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);
    vi.mocked(completeScoringEvent).mockResolvedValue(undefined as never);
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(undefined);

    const report = await syncTournamentResults("t-1", {
      skipEventId: "ev-PRIMARY",
    });

    expect(report.windowsSynced).toBe(1);
    expect(processQualifyingEvent).toHaveBeenCalledTimes(1);
    expect(processQualifyingEvent).toHaveBeenCalledWith("ev-SIBLING", db, {
      skipNotifications: false,
      canonicalTieCountByPlacement: expect.any(Map),
    });
    // No event_results written for the skipped primary window.
    expect(
      state.eventResults.some((r) => r.scoringEventId === "ev-PRIMARY")
    ).toBe(false);
  });
});

// ---------------------------------------------------------------------------
// syncMajorFromPrimaryEvent: bracket/CS2 majors promote primary results to
// canonical tournament_results, then fan out to siblings (primary skipped).
// ---------------------------------------------------------------------------

describe("syncMajorFromPrimaryEvent", () => {
  it("promotes primary event_results to canonical and fans out to siblings", async () => {
    const state = seedBasicState({
      scoringEvents: [
        { id: "ev-PRIMARY", sportsSeasonId: "ss-P", tournamentId: "t-1", name: "Major" },
        { id: "ev-SIBLING", sportsSeasonId: "ss-S", tournamentId: "t-1", name: "Major" },
      ],
      seasonParticipants: [
        { id: "sp-PA", sportsSeasonId: "ss-P", participantId: "cp-A", name: "A" },
        { id: "sp-PB", sportsSeasonId: "ss-P", participantId: "cp-B", name: "B" },
        { id: "sp-SA", sportsSeasonId: "ss-S", participantId: "cp-A", name: "A" },
        { id: "sp-SB", sportsSeasonId: "ss-S", participantId: "cp-B", name: "B" },
      ],
    });
    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);
    vi.mocked(completeScoringEvent).mockResolvedValue(undefined as never);
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(undefined);

    vi.mocked(getScoringEventById).mockResolvedValue({
      id: "ev-PRIMARY",
      sportsSeasonId: "ss-P",
      tournamentId: "t-1",
      name: "Major",
    } as never);

    // Primary window's derived results: cp-A 1st, cp-B 2nd.
    vi.mocked(getEventResults).mockResolvedValue([
      {
        placement: 1,
        rawScore: "1",
        notParticipating: false,
        seasonParticipantId: "sp-PA",
        seasonParticipant: { participantId: "cp-A" },
      },
      {
        placement: 2,
        rawScore: "2",
        notParticipating: false,
        seasonParticipantId: "sp-PB",
        seasonParticipant: { participantId: "cp-B" },
      },
    ] as never);

    // upsertTournamentResult writes into our fake canonical table so the
    // subsequent syncTournamentResults can read them back.
    vi.mocked(upsertTournamentResult).mockImplementation(
      async (data: { tournamentId: string; participantId: string; placement?: number | null; rawScore?: string | null }) => {
        state.tournamentResults.push({
          tournamentId: data.tournamentId,
          participantId: data.participantId,
          placement: data.placement ?? null,
          rawScore: data.rawScore ?? null,
        });
        return data as never;
      }
    );

    const report = await syncMajorFromPrimaryEvent("ev-PRIMARY");

    // Two canonical results promoted from the primary.
    expect(upsertTournamentResult).toHaveBeenCalledTimes(2);
    expect(state.tournamentResults).toHaveLength(2);

    // Only the sibling window is synced (primary is skipped).
    expect(report.windowsSynced).toBe(1);
    expect(
      state.eventResults.some((r) => r.scoringEventId === "ev-PRIMARY")
    ).toBe(false);
    const sib = state.eventResults.filter((r) => r.scoringEventId === "ev-SIBLING");
    expect(sib.find((r) => r.seasonParticipantId === "sp-SA")?.placement).toBe(1);
    expect(sib.find((r) => r.seasonParticipantId === "sp-SB")?.placement).toBe(2);

    // In-progress fan-out: siblings are NOT marked complete by default.
    expect(completeScoringEvent).not.toHaveBeenCalled();
  });

  it("splits mirror QP by the bracket's structural tie span, not the canonical row count (R16 in progress)", async () => {
    // Tennis R16 in progress: two R16 matches are decided (losers cp-L1/cp-L2 land
    // final at 9th) and two players (cp-F1/cp-F2) won their R32 match and are still
    // "floored" at the R16 tier (also placement 9). So only FOUR players sit at
    // placement 9 right now — the canonical row-count is 4, which would wrongly
    // split 9th–16th four ways (→ 2 QP). The R16 tier structurally spans 8 slots,
    // so every window must split (2+2+2+2+1+1+1+1)/8 = 1.5. This asserts the map
    // handed to each mirror's processQualifyingEvent carries the structural span (8),
    // not the live count (4).
    const state = seedBasicState({
      scoringEvents: [
        {
          id: "ev-PRIMARY",
          sportsSeasonId: "ss-P",
          tournamentId: "t-1",
          name: "Wimbledon",
        },
        {
          id: "ev-MIRROR",
          sportsSeasonId: "ss-M",
          tournamentId: "t-1",
          name: "Wimbledon",
        },
      ],
      seasonParticipants: [
        { id: "sp-ML1", sportsSeasonId: "ss-M", participantId: "cp-L1", name: "L1" },
        { id: "sp-MF1", sportsSeasonId: "ss-M", participantId: "cp-F1", name: "F1" },
      ],
      // Primary bracket state. R32 wins establish the "floored at R16" players;
      // decided R16 matches establish the final 9th-place losers and the QF-floored
      // winners (placement 5).
      playoffMatches: [
        {
          scoringEventId: "ev-PRIMARY",
          round: "Round of 32",
          winnerId: "cp-F1",
          loserId: "cp-out1",
          participant1Id: "cp-F1",
          participant2Id: "cp-out1",
        },
        {
          scoringEventId: "ev-PRIMARY",
          round: "Round of 32",
          winnerId: "cp-F2",
          loserId: "cp-out2",
          participant1Id: "cp-F2",
          participant2Id: "cp-out2",
        },
        {
          scoringEventId: "ev-PRIMARY",
          round: "Round of 16",
          winnerId: "cp-W1",
          loserId: "cp-L1",
          participant1Id: "cp-W1",
          participant2Id: "cp-L1",
        },
        {
          scoringEventId: "ev-PRIMARY",
          round: "Round of 16",
          winnerId: "cp-W2",
          loserId: "cp-L2",
          participant1Id: "cp-W2",
          participant2Id: "cp-L2",
        },
      ],
    });
    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);
    vi.mocked(completeScoringEvent).mockResolvedValue(undefined as never);
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(undefined);

    vi.mocked(getScoringEventById).mockResolvedValue({
      id: "ev-PRIMARY",
      sportsSeasonId: "ss-P",
      tournamentId: "t-1",
      name: "Wimbledon",
      bracketTemplateId: "tennis_128",
    } as never);

    // Primary window's derived results (what processQualifyingBracketEvent wrote):
    // four players at placement 9 (2 final losers + 2 floored), two at placement 5.
    vi.mocked(getEventResults).mockResolvedValue(
      [
        ["sp-PL1", "cp-L1", 9],
        ["sp-PL2", "cp-L2", 9],
        ["sp-PF1", "cp-F1", 9],
        ["sp-PF2", "cp-F2", 9],
        ["sp-PW1", "cp-W1", 5],
        ["sp-PW2", "cp-W2", 5],
      ].map(([seasonParticipantId, participantId, placement]) => ({
        placement,
        rawScore: null,
        notParticipating: false,
        seasonParticipantId,
        seasonParticipant: { participantId },
      })) as never
    );

    vi.mocked(upsertTournamentResult).mockImplementation(
      async (data: {
        tournamentId: string;
        participantId: string;
        placement?: number | null;
        rawScore?: string | null;
      }) => {
        state.tournamentResults.push({
          tournamentId: data.tournamentId,
          participantId: data.participantId,
          placement: data.placement ?? null,
          rawScore: data.rawScore ?? null,
        });
        return data as never;
      }
    );

    await syncMajorFromPrimaryEvent("ev-PRIMARY", { markComplete: false });

    // Sanity: only four canonical rows sit at placement 9 (the live count is 4).
    expect(
      state.tournamentResults.filter((r) => r.placement === 9)
    ).toHaveLength(4);

    // The mirror window was scored with the STRUCTURAL span, not the row count.
    const mirrorCall = (processQualifyingEvent as Mock).mock.calls.find(
      (c) => c[0] === "ev-MIRROR"
    );
    expect(mirrorCall).toBeDefined();
    if (!mirrorCall) return;
    const tieMap = mirrorCall[2].canonicalTieCountByPlacement as Map<number, number>;
    expect(tieMap.get(9)).toBe(8); // R16 tier spans 8, not the 4 rows currently there
    expect(tieMap.get(5)).toBe(4); // QF tier spans 4
  });

  it("fans a non-scoring-round elimination out to each mirror window (translated to its own season_participant id)", async () => {
    // The reported bug: a player knocked out in a non-scoring round earns no QP, so
    // canonical promotion skips them (null placement) and the mirror can't detect the
    // knockout locally. The primary passes its eliminated season_participant id
    // (sp-PX) down; syncMajorFromPrimaryEvent must translate it to the canonical
    // participant (cp-X) and each mirror window must re-translate to ITS own
    // season_participant (sp-MX) before handing it to processQualifyingEvent.
    const state = seedBasicState({
      scoringEvents: [
        { id: "ev-PRIMARY", sportsSeasonId: "ss-P", tournamentId: "t-1", name: "Wimbledon" },
        { id: "ev-MIRROR", sportsSeasonId: "ss-M", tournamentId: "t-1", name: "Wimbledon" },
      ],
      seasonParticipants: [
        // Placed finalist, present on both windows.
        { id: "sp-PA", sportsSeasonId: "ss-P", participantId: "cp-A", name: "A" },
        { id: "sp-MA", sportsSeasonId: "ss-M", participantId: "cp-A", name: "A" },
        // Knocked-out player: different season_participant row per window, same
        // canonical participant cp-X.
        { id: "sp-PX", sportsSeasonId: "ss-P", participantId: "cp-X", name: "X" },
        { id: "sp-MX", sportsSeasonId: "ss-M", participantId: "cp-X", name: "X" },
      ],
    });
    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);
    vi.mocked(completeScoringEvent).mockResolvedValue(undefined as never);
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(undefined);

    vi.mocked(getScoringEventById).mockResolvedValue({
      id: "ev-PRIMARY",
      sportsSeasonId: "ss-P",
      tournamentId: "t-1",
      name: "Wimbledon",
    } as never);

    // Primary derived results promote only the PLACED player. cp-X (the non-scoring
    // loser) has no placement and is not promoted to canonical — exactly why the
    // mirror needs the elimination threaded separately.
    vi.mocked(getEventResults).mockResolvedValue([
      {
        placement: 1,
        rawScore: "1",
        notParticipating: false,
        seasonParticipantId: "sp-PA",
        seasonParticipant: { participantId: "cp-A" },
      },
    ] as never);

    vi.mocked(upsertTournamentResult).mockImplementation(
      async (data: { tournamentId: string; participantId: string; placement?: number | null; rawScore?: string | null }) => {
        state.tournamentResults.push({
          tournamentId: data.tournamentId,
          participantId: data.participantId,
          placement: data.placement ?? null,
          rawScore: data.rawScore ?? null,
        });
        return data as never;
      }
    );

    await syncMajorFromPrimaryEvent("ev-PRIMARY", {
      newlyEliminatedParticipantIds: new Set(["sp-PX"]),
    });

    const mirrorCall = (processQualifyingEvent as Mock).mock.calls.find(
      (c) => c[0] === "ev-MIRROR"
    );
    expect(mirrorCall).toBeDefined();
    if (!mirrorCall) return;
    const eliminated = mirrorCall[2].newlyEliminatedParticipantIds as Set<string>;
    // cp-X → the MIRROR's own season_participant id, not the primary's.
    expect([...eliminated]).toEqual(["sp-MX"]);
  });

  it("throws when the primary event is not linked to a tournament", async () => {
    const db = makeFakeDb(seedBasicState());
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(getScoringEventById).mockResolvedValue({
      id: "ev-X",
      sportsSeasonId: "ss-X",
      tournamentId: null,
      name: "Standalone",
    } as never);

    await expect(syncMajorFromPrimaryEvent("ev-X")).rejects.toThrow(
      /not linked to a tournament/
    );
  });
});

// ---------------------------------------------------------------------------
// Regression: review fixes #1 (recalc failure counts) and #2 (stale removal)
// ---------------------------------------------------------------------------

describe("syncTournamentResults — recalc failure & stale removal", () => {
  it("counts a league-recalc failure as a failed window (so status can't show completed)", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: null },
      ],
      scoringEvents: [{ id: "ev-1", sportsSeasonId: "ss-1", tournamentId: "t-1" }],
      seasonParticipants: [
        { id: "sp-A", sportsSeasonId: "ss-1", participantId: "cp-A", name: "A" },
      ],
    });
    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);
    vi.mocked(completeScoringEvent).mockResolvedValue(undefined as never);
    vi.mocked(recalculateAffectedLeagues).mockRejectedValue(new Error("recalc boom"));

    const report = await syncTournamentResults("t-1");

    expect(report.windowsFailed).toBe(1);
    expect(report.failures.some((f) => f.error.includes("League recalc failed"))).toBe(true);
  });

  it("resets a previously-placed participant to filler when dropped from canonical", async () => {
    const state = seedBasicState({
      tournamentResults: [
        { tournamentId: "t-1", participantId: "cp-A", placement: 1, rawScore: "10" },
      ],
      scoringEvents: [{ id: "ev-1", sportsSeasonId: "ss-1", tournamentId: "t-1" }],
      seasonParticipants: [
        { id: "sp-A", sportsSeasonId: "ss-1", participantId: "cp-A", name: "A" },
      ],
    });
    const db = makeFakeDb(state);
    vi.mocked(database).mockReturnValue(db as never);
    vi.mocked(processQualifyingEvent).mockResolvedValue(undefined);
    vi.mocked(completeScoringEvent).mockResolvedValue(undefined as never);
    vi.mocked(recalculateAffectedLeagues).mockResolvedValue(undefined);

    await syncTournamentResults("t-1");
    expect(state.eventResults.find((r) => r.seasonParticipantId === "sp-A")?.placement).toBe(1);

    // Correction: cp-A is removed from the canonical results entirely.
    state.tournamentResults.length = 0;
    await syncTournamentResults("t-1");

    const row = state.eventResults.find((r) => r.seasonParticipantId === "sp-A");
    expect(row?.placement).toBeNull();
    expect(row?.rawScore).toBeNull();
    expect(row?.qualifyingPointsAwarded).toBe("0");
  });
});