import test from "node:test";
import assert from "node:assert/strict";

import {
  applyBumpsForRace,
  buildRaceFormatConfigFromForm,
  buildRaceSessionsFromWizard,
  generateFinalsForRace,
  generateQualifyingForRace,
  reseedUpcomingQualifying,
} from "../src/event_race_logic.js";
import {
  buildFinalStandings,
  compareNumberSet,
  formatLeaderboardGap,
  getCompetitorSeedMetric,
  getQualifyingPointsValue,
  getSessionLapWindow,
  getSessionTargetMs,
  getSessionTiming,
  isHighPointsTable,
  isUntimedSession,
} from "../src/timing_logic.js";

function createUid() {
  let index = 0;
  return (prefix) => `${prefix}_${++index}`;
}

function createForm(values) {
  const fields = new Map(Object.entries(values));
  return { get: (name) => fields.get(name) ?? null };
}

const normalizeStartMode = (mode) => ["mass", "staggered", "position"].includes(mode) ? mode : "mass";
const chunkArray = (items, size) => {
  const chunks = [];
  for (let index = 0; index < items.length; index += size) {
    chunks.push(items.slice(index, index + size));
  }
  return chunks;
};

test("race format form normalizes limits and preserves participants and teams", () => {
  const event = {
    raceConfig: {
      driverIds: ["driver_1", "driver_2"],
      participantsConfigured: true,
      teams: [{ id: "team_1", name: "Red" }],
    },
  };
  const config = buildRaceFormatConfigFromForm(
    createForm({
      presetId: "club_qualifying",
      qualifyingScoring: "best",
      qualifyingRounds: "0",
      carsPerHeat: "1",
      qualDurationMin: "0",
      qualStartMode: "position",
      qualSeedLapCount: "3",
      qualSeedMethod: "invalid",
      countedQualRounds: "2",
      qualifyingPointsTable: "ifmar",
      qualifyingTieBreak: "best_lap",
      carsPerFinal: "1",
      finalLegs: "3",
      countedFinalLegs: "2",
      finalDurationMin: "5",
      finalStartMode: "staggered",
      followUpSec: "15",
      minLapSec: "11.25",
      maxLapSec: "60.5",
      bumpCount: "1",
      reserveBumpSlots: "on",
      finalsSource: "practice",
    }),
    event,
    { normalizeStartMode, getEventTeams: (item) => item.raceConfig.teams }
  );

  assert.equal(config.qualifyingRounds, 3);
  assert.equal(config.carsPerHeat, 2);
  assert.equal(config.qualDurationMin, 5);
  assert.equal(config.qualSeedMethod, "best_sum");
  assert.equal(config.carsPerFinal, 2);
  assert.equal(config.minLapMs, 11250);
  assert.equal(config.maxLapMs, 60500);
  assert.equal(config.reserveBumpSlots, true);
  assert.equal(config.finalsSource, "practice");
  assert.deepEqual(config.driverIds, ["driver_1", "driver_2"]);
  assert.deepEqual(config.teams, [{ id: "team_1", name: "Red" }]);
});

test("race wizard creates configured practice, qualifying, and endurance sessions", () => {
  const event = {
    id: "event_1",
    raceConfig: {
      driverIds: ["driver_1", "driver_2"],
      qualDurationMin: 6,
      qualStartMode: "staggered",
      qualSeedLapCount: 3,
      qualSeedMethod: "consecutive",
      finalDurationMin: 240,
      followUpSec: 20,
    },
  };
  let sequence = 0;
  const buildRaceSession = (eventId, name, type, durationMin, overrides) => ({
    id: `session_${++sequence}`,
    eventId,
    name,
    type,
    durationMin,
    ...overrides,
  });
  const sessions = buildRaceSessionsFromWizard(
    event,
    {
      createPractice: true,
      practiceSessions: 2,
      createQualifying: true,
      qualifyingRounds: 3,
      createTeamRace: true,
      teamRaceDurationMin: 180,
    },
    { t: (key) => key, buildRaceSession }
  );

  assert.equal(sessions.length, 6);
  assert.deepEqual(sessions.map((session) => session.type), [
    "practice",
    "practice",
    "qualification",
    "qualification",
    "qualification",
    "team_race",
  ]);
  assert.equal(sessions[2].durationMin, 6);
  assert.equal(sessions[2].seedMethod, "consecutive");
  assert.equal(sessions[2].followUpSec, 20);
  assert.equal(sessions[5].durationMin, 180);
  assert.deepEqual(sessions[5].driverIds, ["driver_1", "driver_2"]);
});

test("qualifying generation splits seeded drivers into every configured round", () => {
  const state = { sessions: [] };
  const event = {
    id: "event_1",
    raceConfig: {
      qualifyingRounds: 2,
      carsPerHeat: 3,
      qualDurationMin: 7,
      qualStartMode: "staggered",
      qualSeedLapCount: 2,
      qualSeedMethod: "average",
      followUpSec: 12,
    },
  };
  const standings = Array.from({ length: 7 }, (_, index) => ({
    driverId: `driver_${index + 1}`,
    rank: index + 1,
  }));
  let cleared = false;
  const created = generateQualifyingForRace(event, {
    buildPracticeStandings: () => standings,
    getEventDrivers: () => [],
    state,
    normalizeStartMode,
    normalizeSession: (session) => session,
    uid: createUid(),
    chunkArray,
    clearGeneratedQualifying: () => { cleared = true; },
  });

  assert.equal(cleared, true);
  assert.equal(created, 6);
  assert.deepEqual(state.sessions.map((session) => session.name), ["Q1 H1", "Q2 H1", "Q1 H2", "Q2 H2", "Q1 H3", "Q2 H3"]);
  assert.deepEqual(state.sessions[0].driverIds, ["driver_1", "driver_2", "driver_3"]);
  assert.deepEqual(state.sessions[4].driverIds, ["driver_7"]);
  assert.equal(state.sessions[0].durationMin, 7);
  assert.equal(state.sessions[0].seedMethod, "average");
  assert.equal(state.sessions[0].followUpSec, 12);
});

test("qualifying reseed updates ready auto grids but leaves manual grids locked", () => {
  const sessions = [
    { name: "Q2 H1", type: "qualification", generated: true, status: "ready", driverIds: ["old_1"], manualGridIds: ["old_1"], gridCustomized: false },
    { name: "Q2 H2", type: "qualification", generated: true, status: "ready", driverIds: ["locked"], manualGridIds: ["locked"], gridCustomized: true },
    { name: "Q1 H1", type: "qualification", generated: true, status: "finished", driverIds: ["finished"] },
  ];
  const standings = ["driver_3", "driver_1", "driver_2"].map((driverId, index) => ({ driverId, rank: index + 1 }));
  const result = reseedUpcomingQualifying(
    { id: "event_1", raceConfig: { carsPerHeat: 2 } },
    {
      buildQualifyingStandings: () => standings,
      buildPracticeStandings: () => [],
      getEventDrivers: () => [],
      getSessionsForEvent: () => sessions,
      chunkArray,
    }
  );

  assert.deepEqual(result, { updated: 1, locked: 1 });
  assert.deepEqual(sessions[0].driverIds, ["driver_3", "driver_1"]);
  assert.deepEqual(sessions[1].driverIds, ["locked"]);
  assert.deepEqual(sessions[2].driverIds, ["finished"]);
});

test("final generation reserves bump slots and keeps seeded grid order", () => {
  const state = { sessions: [] };
  const sourceRows = Array.from({ length: 7 }, (_, index) => ({ driverId: `driver_${index + 1}` }));
  const event = {
    id: "event_1",
    raceConfig: {
      finalsSource: "qualifying",
      finalLegs: 2,
      carsPerFinal: 4,
      finalDurationMin: 8,
      finalStartMode: "position",
      followUpSec: 15,
      bumpCount: 1,
      reserveBumpSlots: true,
    },
  };
  const created = generateFinalsForRace(event, {
    buildPracticeStandings: () => [],
    buildQualifyingStandings: () => sourceRows,
    clearGeneratedFinals: () => {},
    state,
    normalizeStartMode,
    normalizeSession: (session) => session,
    uid: createUid(),
    chunkArray,
    t: (key) => key,
  });

  assert.equal(created, 6);
  assert.deepEqual(state.sessions.map((session) => session.name), [
    "A session.final 1",
    "A session.final 2",
    "B session.final 1",
    "B session.final 2",
    "C session.final 1",
    "C session.final 2",
  ]);
  assert.deepEqual(state.sessions[0].driverIds, ["driver_1", "driver_2", "driver_3"]);
  assert.equal(state.sessions[0].reservedBumpSlots, 1);
  assert.equal(state.sessions[4].reservedBumpSlots, 0);
  assert.deepEqual(state.sessions[0].manualGridIds, state.sessions[0].driverIds);
});

test("bump-up promotes lower-main winners into reserved upper-main slots", () => {
  const sessions = [
    { name: "A final 1", type: "final", status: "ready", maxCars: 4, reservedBumpSlots: 1, driverIds: ["a1", "a2", "a3"], manualGridIds: ["a1", "a2", "a3"] },
    { name: "B final 1", type: "final", status: "ready", maxCars: 4, reservedBumpSlots: 1, driverIds: ["b1", "b2", "b3"], manualGridIds: ["b1", "b2", "b3"] },
    { name: "C final 1", type: "final", status: "ready", maxCars: 4, reservedBumpSlots: 0, driverIds: ["c1"] },
  ];
  const standings = [
    { rank: "A1", driverId: "a1" },
    { rank: "B1", driverId: "b1" },
    { rank: "B2", driverId: "b2" },
    { rank: "C1", driverId: "c1" },
  ];
  const applied = applyBumpsForRace(
    { id: "event_1", raceConfig: { bumpCount: 1, carsPerFinal: 4 } },
    { buildFinalStandings: () => standings, getSessionsForEvent: () => sessions }
  );

  assert.equal(applied, 2);
  assert.deepEqual(sessions[0].driverIds, ["a1", "a2", "a3", "b1"]);
  assert.deepEqual(sessions[1].driverIds, ["b1", "b2", "b3", "c1"]);
  assert.equal(sessions[0].reservedBumpSlots, 0);
  assert.equal(sessions[1].reservedBumpSlots, 0);
});

test("session timing handles untimed practice, countdown, and follow-up", () => {
  const getTarget = (session) => getSessionTargetMs(session, { isUntimedSession });

  assert.equal(getTarget({ type: "open_practice", durationMin: 5 }), null);
  assert.equal(getTarget({ type: "final", durationMin: 5 }), 300000);

  const timing = getSessionTiming(
    { type: "final", durationMin: 5, startedAt: 1000, followUpSec: 15, followUpStartedAt: 301000 },
    306000,
    { getSessionTargetMs: getTarget }
  );
  assert.equal(timing.elapsedMs, 305000);
  assert.equal(timing.remainingMs, 0);
  assert.equal(timing.followUpActive, true);
  assert.equal(timing.followUpRemainingMs, 10000);

  const untimed = getSessionTiming({ type: "open_practice", startedAt: 1000 }, 61000, { getSessionTargetMs: getTarget });
  assert.equal(untimed.untimed, true);
  assert.equal(untimed.remainingMs, null);
  assert.equal(untimed.elapsedMs, 60000);
});

test("race lap window and seed metrics enforce timing rules", () => {
  const state = {
    events: [
      { id: "race", mode: "race", raceConfig: { minLapMs: 11000, maxLapMs: 60000 } },
      { id: "track", mode: "track" },
      { id: "invalid", mode: "race", raceConfig: { minLapMs: 20000, maxLapMs: 15000 } },
    ],
  };
  assert.deepEqual(getSessionLapWindow({ eventId: "race" }, { state }), { minLapMs: 11000, maxLapMs: 60000 });
  assert.deepEqual(getSessionLapWindow({ eventId: "invalid" }, { state }), { minLapMs: 20000, maxLapMs: 20000 });
  assert.equal(getSessionLapWindow({ eventId: "track" }, { state }).maxLapMs, Number.POSITIVE_INFINITY);

  const passings = [16000, 21000, 16500, 17000].map((lapMs) => ({ lapMs }));
  const consecutive = getCompetitorSeedMetric(
    { seedBestLapCount: 2, seedMethod: "consecutive" },
    {},
    { getCompetitorPassings: () => passings }
  );
  const best = getCompetitorSeedMetric(
    { seedBestLapCount: 2, seedMethod: "best_sum" },
    {},
    { getCompetitorPassings: () => passings }
  );
  assert.deepEqual(consecutive.laps, [16500, 17000]);
  assert.equal(consecutive.totalMs, 33500);
  assert.deepEqual(best.laps, [16000, 16500]);
  assert.equal(best.totalMs, 32500);
});

test("points tables, tie comparison, and leaderboard gaps remain deterministic", () => {
  assert.equal(getQualifyingPointsValue(2, 8, "rank_low"), 2);
  assert.equal(getQualifyingPointsValue(2, 8, "field_desc"), 7);
  assert.equal(getQualifyingPointsValue(2, 8, "ifmar"), 9);
  assert.equal(isHighPointsTable("rank_low"), false);
  assert.equal(isHighPointsTable("ifmar"), true);
  assert.equal(compareNumberSet([1, 3], [1, 4]), -1);
  assert.equal(compareNumberSet([10, 8], [10, 7], true), -1);

  const t = (key) => key;
  const leader = { key: "leader", laps: 17, comparisonMs: 16000, totalElapsedMs: 301000, distanceToTargetMs: 1000 };
  assert.equal(formatLeaderboardGap(leader, leader, { isFreePractice: true }, { t }), "status.free_practice");
  assert.equal(formatLeaderboardGap({ key: "second", laps: 17, comparisonMs: 16550 }, leader, { isFreePractice: true }, { t }), "+0.550s");
  assert.equal(formatLeaderboardGap({ key: "second", laps: 16, totalElapsedMs: 290000 }, leader, {}, { t }), "+1L");
  assert.equal(
    formatLeaderboardGap(
      { key: "second", laps: 17, totalElapsedMs: 306000, distanceToTargetMs: 6000 },
      leader,
      { useTargetTieBreak: true },
      { t }
    ),
    "+5.000s"
  );
});

test("final standings count the configured best legs per main", () => {
  const sessions = [
    { id: "a1", type: "final", name: "A final 1" },
    { id: "a2", type: "final", name: "A final 2" },
    { id: "a3", type: "final", name: "A final 3" },
    { id: "b1", type: "final", name: "B final 1" },
  ];
  const rowsBySession = {
    a1: [
      { driverId: "driver_1", driverName: "One", totalElapsedMs: 301000 },
      { driverId: "driver_2", driverName: "Two", totalElapsedMs: 302000 },
    ],
    a2: [
      { driverId: "driver_2", driverName: "Two", totalElapsedMs: 300000 },
      { driverId: "driver_1", driverName: "One", totalElapsedMs: 303000 },
    ],
    a3: [
      { driverId: "driver_1", driverName: "One", totalElapsedMs: 299000 },
      { driverId: "driver_2", driverName: "Two", totalElapsedMs: 304000 },
    ],
    b1: [{ driverId: "driver_3", driverName: "Three", totalElapsedMs: 305000 }],
  };
  const standings = buildFinalStandings(
    { id: "event_1", raceConfig: { countedFinalLegs: 2 } },
    { getSessionsForEvent: () => sessions, buildLeaderboard: (session) => rowsBySession[session.id] }
  );

  assert.deepEqual(standings.map((row) => row.rank), ["A1", "A2", "B1"]);
  assert.equal(standings[0].driverId, "driver_1");
  assert.equal(standings[0].score, "2 (1+1+2)");
  assert.equal(standings[1].score, "3 (1+2+2)");
});