import { afterEach, beforeEach, expect, it, vi } from 'vitest';
import type { GameEvent, TelemetryPlayerStats } from '../../src/lib/telemetry.js';
import { newFixture, type Fixture } from '../helpers/fixture.js';

let fixture: Fixture;
let received = 0;
const server = 't5_zombie_theater_1';
const player = (
    guid = '2741626',
    stats: Partial<TelemetryPlayerStats> = {}
): TelemetryPlayerStats => ({
    guid,
    name: 'JoshWright',
    kills: 0,
    headshots: 0,
    downs: 0,
    revives: 0,
    score: 0,
    ...stats
});

beforeEach(async () => {
    vi.resetModules();
    received = 0;
    fixture = await newFixture([server, 't6_zombie_town_1', 't6_zombie_farm_1']);
    const { seedServerRegistry } = await import('../../src/lib/server/fleet/servers.js');
    await seedServerRegistry();
});
afterEach(async () => fixture.cleanup());

const emptyProfile = {
    stats: {
        highestRound: 0,
        kills: 0,
        roundsSurvived: 0,
        headshots: 0,
        revives: 0,
        downs: 0,
        gamesPlayed: 0,
        gamesCompleted: 0,
        bestKills: 0,
        bestScore: 0
    },
    records: null,
    maps: [],
    matches: [],
    matchesTotal: 0,
    offset: 0,
    limit: 25
};

async function report(
    event: GameEvent['event'],
    round = 0,
    players = [player()],
    source = server,
    map = 'zombie_theater'
) {
    const { saveTelemetry } = await import('../../src/lib/server/fleet/telemetry.js');
    const receivedAt = new Date(Date.UTC(2026, 8, 18, 20, 0, received++)).toISOString();
    saveTelemetry(
        event === 'game_start'
            ? {
                  event,
                  server: source,
                  map,
                  players: players.map(({ name, guid }) => ({ name, guid })),
                  receivedAt
              }
            : { event, server: source, map, round, players, receivedAt }
    );
}

async function matches() {
    const { db } = await import('../../src/lib/server/db/index.js');
    return db().prepare('SELECT * FROM leaderboard_matches ORDER BY id').all() as Array<{
        id: number;
        game: string;
        map: string;
        map_key: string;
        map_name: string;
        status: string;
        highest_round: number;
        start_observed: number;
    }>;
}

it('keeps report revisions stable during a match and invalidates completed data and renamed players', async () => {
    const { db, closeDb } = await import('../../src/lib/server/db/index.js');
    const revision = () =>
        (
            db()
                .prepare("SELECT revision FROM report_revisions WHERE topic='leaderboard'")
                .get() as { revision: number }
        ).revision;
    await report('game_start');
    const started = revision();
    for (let round = 1; round <= 30; round++) {
        await report('round_change', round, [player(undefined, { kills: round * 10 })]);
        await report('heartbeat', round);
    }
    expect(revision()).toBe(started);
    await report('game_end', 30);
    expect(revision()).toBeGreaterThan(started);
    const completed = revision();
    db().prepare('UPDATE leaderboard_players SET last_seen_at=?').run('2026-10-06T12:00:00.000Z');
    expect(revision()).toBe(completed);
    db().prepare("UPDATE leaderboard_players SET name='Renamed'").run();
    expect(revision()).toBe(completed + 1);
    db().prepare('UPDATE leaderboard_match_players SET kills=kills+1').run();
    expect(revision()).toBe(completed + 2);
    closeDb();
    const reopened = revision();
    db().prepare('DELETE FROM leaderboard_matches').run();
    expect(revision()).toBeGreaterThan(reopened);
});

it.each([
    ['t5', server, 'zombie_theater'],
    ['t6', 't6_zombie_town_1', 'zm_transit']
])(
    'loads a known %s player before qualification and refreshes cached profiles after game end',
    async (game, source, map) => {
        const { load } =
            await import('../../src/routes/leaderboard/players/[guid]/+page.server.js');
        const request = {
            params: { guid: player().guid },
            url: new URL(
                `http://localhost/leaderboard/players/${player().guid}?game=${game}&offset=999`
            )
        };
        const send = (event: GameEvent['event'], round = 0) =>
            report(event, round, [player(undefined, { kills: 20 })], source, map);

        await expect(load(request)).rejects.toMatchObject({ status: 404 });
        await send('game_start');
        const started = await load(request);
        expect(started).toMatchObject({
            profile: { ...emptyProfile, guid: player().guid, name: player().name },
            scope: { entry: null }
        });
        expect(started.profile.firstSeen).toBe('2026-09-18T20:00:00.000Z');
        expect(started.profile.lastSeen).toBe(started.profile.firstSeen);
        await send('game_end', 1);
        expect((await load(request)).profile).toMatchObject(emptyProfile);
        await send('game_start');
        await send('heartbeat', 2);
        expect((await load(request)).profile).toMatchObject(emptyProfile);
        await send('game_end', 2);
        const completed = await load(request);
        expect(completed).toMatchObject({
            profile: {
                stats: { highestRound: 2, kills: 20, gamesPlayed: 1 },
                records: { highestRound: { value: 2 } },
                matchesTotal: 1,
                offset: 0
            },
            scope: { entry: { rank: 1, kills: 20 } }
        });
        await send('game_start');
        await send('heartbeat', 10);
        expect((await load(request)).profile.stats).toEqual(completed.profile.stats);
    }
);

it('publishes round 2 or higher games only after game end, preserving early stats and excluding round 1 departures', async () => {
    const { getLeaderboard } = await import('../../src/lib/server/fleet/leaderboard.js');
    const { getPlayerProfile } = await import('../../src/lib/server/fleet/player-profile.js');
    const { serverMatchHistory } = await import('../../src/lib/server/fleet/match-history.js');
    const departed = player('round-one-only', { kills: 5 });
    await report('game_start', 0, [player(), departed]);
    await report('round_change', 1, [player(undefined, { kills: 6, score: 1000 }), departed]);
    expect(getLeaderboard()).toMatchObject({
        entries: [],
        maps: [],
        total: 0,
        summary: { players: 0, matches: 0, kills: 0 }
    });
    expect(getPlayerProfile(player().guid)).toMatchObject(emptyProfile);
    expect(serverMatchHistory()).toEqual({ total: 0, matches: [], maps: [], page: 1, limit: 25 });
    await report('round_change', 2, [player(undefined, { kills: 6, score: 500 })]);
    expect(getLeaderboard()).toMatchObject({
        entries: [],
        maps: [],
        total: 0,
        summary: { players: 0, matches: 0, kills: 0 }
    });
    expect(getPlayerProfile(player().guid)).toMatchObject(emptyProfile);
    expect(serverMatchHistory()).toMatchObject({ total: 1, matches: [{ status: 'active' }] });
    expect(getPlayerProfile(departed.guid)).toMatchObject(emptyProfile);
    await report('game_end', 2, [player(undefined, { kills: 10 })]);
    const board = getLeaderboard();
    const profile = getPlayerProfile(player().guid);
    const history = serverMatchHistory();
    expect(board).toMatchObject({
        total: 1,
        entries: [
            expect.objectContaining({
                highestRound: 2,
                kills: 10,
                bestScore: 1000,
                roundsSurvived: 1,
                gamesPlayed: 1,
                gamesCompleted: 1
            })
        ],
        summary: { players: 1, matches: 1, kills: 10 }
    });
    expect(getPlayerProfile(departed.guid)).toMatchObject(emptyProfile);
    expect(history).toMatchObject({
        total: 1,
        matches: [{ startPlayers: 2, uniquePlayers: 2, durationMs: 3000, finalRound: 2 }]
    });
    await report('game_start');
    await report('game_end', 1, [player(undefined, { kills: 5000 })]);
    await report('game_start', 0, []);
    await report('game_end', 1, []);
    const { closeDb } = await import('../../src/lib/server/db/index.js');
    closeDb();
    expect(getLeaderboard()).toEqual(board);
    // Identity timestamps still reflect live presence, but gameplay records do not change.
    expect(getPlayerProfile(player().guid)).toMatchObject({
        stats: profile!.stats,
        maps: profile!.maps,
        matches: profile!.matches
    });
    expect(serverMatchHistory()).toEqual(history);
    const { GET } = await import('../../src/routes/api/matches/+server.js');
    expect(await GET({ url: new URL('http://localhost/api/matches?limit=1') }).json()).toEqual({
        ...history,
        limit: 1
    });
    const { GET: serverGET } =
        await import('../../src/routes/api/servers/[name]/matches/+server.js');
    expect(
        await serverGET({
            params: { name: server },
            url: new URL('http://localhost/?limit=1')
        }).json()
    ).toEqual({ ...history, limit: 1 });
});

it('records server match counts, unique rejoins, duration, and final round durably', async () => {
    await report('game_start', 0, [player('a'), player('b')]);
    await report('round_change', 2, [player('b'), player('c')]);
    await report('heartbeat', 2, [player('a'), player('c')]);
    await report('game_end', 7, [player('c')]);
    await report('game_end', 7, [player('c')]);
    const { closeDb } = await import('../../src/lib/server/db/index.js');
    closeDb();
    const { serverMatchHistory } = await import('../../src/lib/server/fleet/match-history.js');
    expect(serverMatchHistory(server)).toMatchObject({
        total: 1,
        matches: [
            expect.objectContaining({
                status: 'completed',
                startPlayers: 2,
                uniquePlayers: 3,
                endPlayers: 1,
                durationMs: 3000,
                finalRound: 7,
                endedAt: '2026-09-18T20:00:03.000Z'
            })
        ]
    });
    expect(serverMatchHistory('other')).toEqual({
        total: 0,
        matches: [],
        maps: [],
        page: 1,
        limit: 25
    });
});

it('preserves unknown boundaries and distinguishes empty rosters from missing observations', async () => {
    await report('heartbeat', 5);
    await report('game_end', 6, []);
    await report('game_start', 0, []);
    await report('round_change', 2);
    await report('game_start');
    await report('round_change', 2);
    const { serverMatchHistory } = await import('../../src/lib/server/fleet/match-history.js');
    expect(serverMatchHistory(server).matches).toEqual([
        expect.objectContaining({
            status: 'active',
            startPlayers: 1,
            endPlayers: null,
            durationMs: null,
            finalRound: null,
            endedAt: null
        }),
        expect.objectContaining({
            status: 'interrupted',
            startPlayers: 0,
            endPlayers: null,
            durationMs: null,
            finalRound: null,
            endedAt: null
        }),
        expect.objectContaining({
            status: 'completed',
            startPlayers: null,
            uniquePlayers: 1,
            endPlayers: 0,
            durationMs: null,
            finalRound: 6
        })
    ]);
    const { GET } = await import('../../src/routes/api/servers/[name]/matches/+server.js');
    const response = GET({ params: { name: server }, url: new URL('http://localhost/?limit=1') });
    const body = await response.json();
    expect(body.total).toBe(3);
    expect(body.matches).toHaveLength(1);
    expect(
        GET({ params: { name: server }, url: new URL('http://localhost/?limit=-1') }).status
    ).toBe(400);
});

it('lists global matches newest first across servers with totals and ending timestamps', async () => {
    await report('game_start');
    await report('game_end', 8);
    await report('game_start', 0, [player()], 't6_zombie_town_1', 'zm_transit');
    await report('round_change', 2, [player()], 't6_zombie_town_1', 'zm_transit');
    const { GET } = await import('../../src/routes/api/matches/+server.js');
    const all = await GET({ url: new URL('http://localhost/api/matches') }).json();
    expect(all.total).toBe(2);
    expect(all.matches).toEqual([
        expect.objectContaining({ server: 't6_zombie_town_1', endedAt: null }),
        expect.objectContaining({ server, endedAt: '2026-09-18T20:00:01.000Z' })
    ]);
    const limited = await GET({ url: new URL('http://localhost/api/matches?limit=1') }).json();
    expect(limited.total).toBe(2);
    expect(limited.matches).toEqual([all.matches[0]]);
    expect(GET({ url: new URL('http://localhost/api/matches?limit=0') }).status).toBe(400);
});

async function records(guid = '2741626') {
    const { db } = await import('../../src/lib/server/db/index.js');
    return db()
        .prepare('SELECT * FROM leaderboard_match_players WHERE guid = ? ORDER BY match_id')
        .all(guid) as Array<{
        match_id: number;
        guid: string;
        highest_round: number;
        rounds_survived: number;
        kills: number;
        headshots: number;
        downs: number;
        revives: number;
        best_score: number;
        completed: number;
        present: number;
    }>;
}

it('refreshes stats during a round without adding rounds or completing the match', async () => {
    await report('game_start');
    await report('round_change', 30, [player(undefined, { kills: 100 })]);
    await report('heartbeat', 30, [player(undefined, { kills: 150 })]);
    await report('heartbeat', 30, [player(undefined, { kills: 150 })]);
    expect(await matches()).toEqual([
        expect.objectContaining({ status: 'active', highest_round: 30 })
    ]);
    expect(await records()).toEqual([
        expect.objectContaining({ kills: 150, rounds_survived: 29, completed: 0 })
    ]);
    await report('game_end', 30);
    await report('heartbeat', 30);
    expect((await matches()).map((match) => match.status)).toEqual(['completed', 'active']);
});

it('refreshes the last report for identical heartbeats without changing participation or completed results', async () => {
    const { serverMatchHistory } = await import('../../src/lib/server/fleet/match-history.js');
    await report('game_start');
    await report('heartbeat', 5, [player(undefined, { kills: 100 })]);
    const participants = await records();
    received += 120;
    await report('heartbeat', 5, [player(undefined, { kills: 100 })]);
    expect(await matches()).toHaveLength(1);
    expect(await records()).toEqual(participants);
    expect(serverMatchHistory(server).matches[0]).toMatchObject({
        status: 'active',
        lastReportedAt: '2026-09-18T20:02:02.000Z'
    });
    await report('game_end', 5);
    const completed = serverMatchHistory(server).matches[0];
    await report('game_end', 5);
    expect(serverMatchHistory(server).matches[0]).toEqual(completed);
});

it('starts a new match when an identical heartbeat follows an interrupted match', async () => {
    await report('heartbeat', 5);
    const { db } = await import('../../src/lib/server/db/index.js');
    db()
        .prepare("UPDATE leaderboard_matches SET status='interrupted', ended_at=last_received_at")
        .run();
    const interrupted = (await matches())[0];
    await report('heartbeat', 5);
    expect(await matches()).toEqual([
        interrupted,
        expect.objectContaining({ status: 'active', highest_round: 5, start_observed: 0 })
    ]);
});

it('persists independent stat high-water marks without adding cumulative snapshots or retries', async () => {
    await report('game_start');
    await report('round_change', 1);
    const first = player(undefined, {
        kills: 100,
        headshots: 60,
        downs: 2,
        revives: 3,
        score: 5000
    });
    await report('round_change', 3, [first]);
    await report('round_change', 3, [first]);
    await report('round_change', 4, [
        player(undefined, {
            kills: 120,
            headshots: 55,
            downs: 1,
            revives: 5,
            score: 1000
        })
    ]);
    await report('game_end', 4, [
        player(undefined, {
            kills: 125,
            headshots: 62,
            downs: 3,
            revives: 5,
            score: 2000
        })
    ]);
    expect(await matches()).toHaveLength(1);
    expect(await records()).toEqual([
        expect.objectContaining({
            highest_round: 4,
            rounds_survived: 3,
            kills: 125,
            headshots: 62,
            downs: 3,
            revives: 5,
            best_score: 5000,
            completed: 1
        })
    ]);
});

it('combines the same GUID into one profile and ranking across games', async () => {
    await report('round_change', 8, [player(undefined, { kills: 111 })]);
    await report('game_end', 8, [player(undefined, { kills: 120, name: 'New name' })]);
    await report('game_start');
    await report('game_end', 2, [player(undefined, { kills: 20, name: 'Latest name' })]);
    await report(
        'game_end',
        5,
        [player(undefined, { kills: 200, name: 'Other game' })],
        't6_zombie_town_1',
        'zm_transit'
    );
    const { db, closeDb } = await import('../../src/lib/server/db/index.js');
    expect(
        db().prepare('SELECT game, guid, name FROM leaderboard_players ORDER BY game').all()
    ).toEqual([
        { game: 't5', guid: '2741626', name: 'Latest name' },
        { game: 't6', guid: '2741626', name: 'Other game' }
    ]);
    expect((await records()).map((row) => row.kills)).toEqual([120, 20, 200]);
    expect(
        db()
            .prepare(
                `SELECT SUM(p.rounds_survived) AS total FROM leaderboard_match_players p
        JOIN leaderboard_matches m ON m.id = p.match_id WHERE m.game = 't5' AND p.guid = ?`
            )
            .get('2741626')
    ).toEqual({ total: 1 });
    closeDb();
    const { getPlayerProfile } = await import('../../src/lib/server/fleet/player-profile.js');
    const { getLeaderboard } = await import('../../src/lib/server/fleet/leaderboard.js');
    const profile = getPlayerProfile(player().guid)!;
    expect(profile).toMatchObject({
        guid: player().guid,
        name: 'Other game',
        firstSeen: '2026-09-18T20:00:00.000Z',
        lastSeen: '2026-09-18T20:00:04.000Z',
        stats: {
            gamesPlayed: 3,
            gamesCompleted: 3,
            kills: 340,
            highestRound: 8,
            bestKills: 200,
            roundsSurvived: 1
        }
    });
    expect(profile.matches.map((match) => match.game)).toEqual(['t6', 't5', 't5']);
    const board = getLeaderboard();
    expect(board).toMatchObject({ total: 1, summary: { players: 1, matches: 3, kills: 340 } });
    expect(board.entries).toEqual([
        expect.objectContaining({
            ...profile.stats,
            guid: player().guid,
            name: profile.name,
            rank: 1
        })
    ]);
    expect(getLeaderboard({ game: 't5' }).entries).toEqual([
        expect.objectContaining({
            guid: player().guid,
            name: 'Other game',
            kills: 140,
            gamesPlayed: 2
        })
    ]);
    expect(getLeaderboard({ game: 't6' }).entries).toEqual([
        expect.objectContaining({
            guid: player().guid,
            name: 'Other game',
            kills: 200,
            gamesPlayed: 1
        })
    ]);
    await report('game_start', 0, [player(undefined, { name: 'Live name' })]);
    expect(getPlayerProfile(player().guid)).toMatchObject({
        name: 'Live name',
        lastSeen: '2026-09-18T20:00:05.000Z',
        stats: profile.stats,
        maps: profile.maps,
        matches: profile.matches
    });
    expect(getLeaderboard().entries).toEqual([
        expect.objectContaining({ ...profile.stats, name: 'Live name' })
    ]);
});

it('credits the highest round but only observed survival for a late join or a return after an absent roster', async () => {
    await report('game_start');
    await report('round_change', 2);
    await report('round_change', 3, []);
    const late = player('4229696', { name: 'Late player' });
    await report('round_change', 5, [player(), late]);
    await report('round_change', 6, [late, player()]);
    await report('game_end', 6, [player()]);
    expect(await records()).toEqual([
        expect.objectContaining({
            highest_round: 6,
            rounds_survived: 2,
            completed: 1
        })
    ]);
    expect(await records(late.guid)).toEqual([
        expect.objectContaining({
            highest_round: 6,
            rounds_survived: 1,
            completed: 0,
            present: 0
        })
    ]);
});

it('credits the highest round without inventing survival before the first midgame snapshot', async () => {
    await report('round_change', 8, [player(undefined, { kills: 111 })]);
    expect(await records()).toEqual([
        expect.objectContaining({ highest_round: 8, rounds_survived: 0, kills: 111 })
    ]);
    await report('round_change', 10, [player(undefined, { kills: 160 })]);
    await report('game_end', 10, [player(undefined, { kills: 170 })]);
    expect(await records()).toEqual([
        expect.objectContaining({ highest_round: 10, rounds_survived: 2, completed: 1 })
    ]);
    expect(await matches()).toEqual([
        expect.objectContaining({ start_observed: 0, status: 'completed' })
    ]);
});

it('keeps disconnected player records while completing only the final roster', async () => {
    const { getLeaderboard } = await import('../../src/lib/server/fleet/leaderboard.js');
    const { getPlayerProfile } = await import('../../src/lib/server/fleet/player-profile.js');
    const other = player('4229696', { kills: 40, name: 'Other player' });
    await report('game_start', 0, [player(), other]);
    await report('round_change', 4, [player(undefined, { kills: 80 }), other]);
    expect(getLeaderboard()).toMatchObject({ entries: [], total: 0 });
    expect(getPlayerProfile(other.guid)).toMatchObject(emptyProfile);
    await report('game_end', 5, [player(undefined, { kills: 100 })]);
    expect(await records(other.guid)).toEqual([
        expect.objectContaining({ kills: 40, highest_round: 4, rounds_survived: 3, completed: 0 })
    ]);
    expect(await records()).toEqual([
        expect.objectContaining({ kills: 100, highest_round: 5, rounds_survived: 4, completed: 1 })
    ]);
    expect(getLeaderboard()).toMatchObject({
        total: 2,
        summary: { matches: 1, players: 2, kills: 140 }
    });
    expect(getPlayerProfile(other.guid)).toMatchObject({
        stats: { kills: 40, highestRound: 4, roundsSurvived: 3, gamesPlayed: 1, gamesCompleted: 0 },
        matches: [{ status: 'completed', completed: 0 }]
    });
});

it.each([
    [server, 'zombie_theater', 't5'],
    ['t6_zombie_town_1', 'zm_transit', 't6']
])('does not count same-round departures as games played on %s', async (source, map, game) => {
    const { getLeaderboard } = await import('../../src/lib/server/fleet/leaderboard.js');
    const { getPlayerProfile } = await import('../../src/lib/server/fleet/player-profile.js');
    const departed = player('departed', { kills: 10 });
    const advanced = player('advanced', { kills: 20 });
    const finished = player('finished', { kills: 30 });
    await report('game_start', 0, [], source, map);
    await report('heartbeat', 5, [departed, advanced], source, map);
    await report('heartbeat', 5, [player(departed.guid, { kills: 15 }), advanced], source, map);
    await report('heartbeat', 5, [advanced], source, map);
    await report('round_change', 6, [advanced, finished], source, map);
    await report('game_end', 6, [finished], source, map);

    const { closeDb } = await import('../../src/lib/server/db/index.js');
    closeDb();
    const board = getLeaderboard({ game });
    expect(board.entries.find((entry) => entry.guid === departed.guid)).toMatchObject({
        gamesPlayed: 0,
        gamesCompleted: 0,
        kills: 15,
        highestRound: 5,
        averageKills: null,
        averageRounds: null,
        completionRate: null
    });
    expect(board.entries.find((entry) => entry.guid === advanced.guid)).toMatchObject({
        gamesPlayed: 1,
        gamesCompleted: 0
    });
    expect(board.entries.find((entry) => entry.guid === finished.guid)).toMatchObject({
        gamesPlayed: 1,
        gamesCompleted: 1
    });
    const profile = getPlayerProfile(departed.guid)!;
    expect(profile).toMatchObject({
        stats: { gamesPlayed: 0, kills: 15 },
        maps: [{ gamesPlayed: 0, kills: 15 }],
        matchesTotal: 1,
        matches: [{ kills: 15, completed: 0 }],
        records: { bestKills: { value: 15 } }
    });
    expect(
        getLeaderboard({ game, map: profile.maps[0].key, metric: 'gamesPlayed' }).entries
    ).toContainEqual(expect.objectContaining({ guid: departed.guid, gamesPlayed: 0 }));
    expect(
        getPlayerProfile(departed.guid, 0, { game, map: profile.maps[0].key })?.matchesTotal
    ).toBe(1);
});

it('starts separate matches for game starts, map changes, round resets, and new rounds after an end', async () => {
    await report('game_start');
    await report('round_change', 5, [player(undefined, { kills: 50 })]);
    await report('game_start');
    await report('round_change', 2, [player(undefined, { kills: 20 })]);
    await report('round_change', 3, [player(undefined, { kills: 30 })], server, 'zombie_moon');
    await report('round_change', 1, [player(undefined, { kills: 10 })], server, 'zombie_moon');
    await report('game_end', 1, [player(undefined, { kills: 15 })], server, 'zombie_moon');
    await report('round_change', 1, [player(undefined, { kills: 5 })], server, 'zombie_moon');
    expect((await matches()).map((row) => [row.status, row.highest_round])).toEqual([
        ['interrupted', 5],
        ['interrupted', 2],
        ['interrupted', 3],
        ['completed', 1],
        ['active', 1]
    ]);
    expect((await records()).map((row) => row.kills)).toEqual([50, 20, 30, 15, 5]);
});

it('deduplicates consecutive start and end retries even with new receipt timestamps and reordered players', async () => {
    const other = player('4229696');
    await report('game_start', 0, [player(), other]);
    await report('game_start', 0, [other, player()]);
    await report('round_change', 3, [player(), other]);
    await report('game_end', 3, [player(), other]);
    await report('game_end', 3, [other, player()]);
    expect(await matches()).toHaveLength(1);
    expect(await records()).toEqual([
        expect.objectContaining({ rounds_survived: 2, completed: 1 })
    ]);
});

it('rejects a GUID repeated in the same telemetry roster before it can double-count participation', async () => {
    const { parseGameEvent } = await import('../../src/lib/telemetry.js');
    const snapshot = player(undefined, { kills: 100, headshots: 50 });
    for (const event of ['game_start', 'round_change', 'game_end']) {
        expect(() =>
            parseGameEvent({
                event,
                server,
                map: 'zombie_theater',
                round: 5,
                players: [snapshot, snapshot]
            })
        ).toThrow(/guid must be unique/);
    }
});

it('keeps T6 location variants distinct when they share the same engine map', async () => {
    await report('game_end', 8, [player()], 't6_zombie_town_1', 'zm_transit');
    await report('game_end', 12, [player()], 't6_zombie_farm_1', 'zm_transit');
    const rows = await matches();
    expect(rows.map((row) => row.game)).toEqual(['t6', 't6']);
    expect(rows.map((row) => row.map)).toEqual(['zm_transit', 'zm_transit']);
    expect(new Set(rows.map((row) => row.map_key)).size).toBe(2);
    expect(rows.map((row) => row.map_name)).toEqual(['Town Survival', 'Farm Survival']);
});

it('retains historical records across app restarts and server removal', async () => {
    await report('game_start');
    await report('round_change', 4, [player(undefined, { kills: 100 })]);
    const { db, closeDb } = await import('../../src/lib/server/db/index.js');
    closeDb();
    await report('game_end', 5, [player(undefined, { kills: 150 })]);
    db().prepare('DELETE FROM servers WHERE name = ?').run(server);
    closeDb();
    expect(await records()).toEqual([
        expect.objectContaining({ kills: 150, rounds_survived: 4, completed: 1 })
    ]);
    expect(await matches()).toHaveLength(1);
});

it('backfills valid saved telemetry once while skipping malformed and legacy snapshots', async () => {
    const { db, closeDb } = await import('../../src/lib/server/db/index.js');
    const receivedAt = '2026-09-18T20:01:39.729Z';
    const saved = {
        event: 'round_change',
        server,
        map: 'zombie_theater',
        round: 8,
        players: [player(undefined, { kills: 111, headshots: 61 })],
        receivedAt
    };
    const insert = db().prepare(
        'INSERT INTO server_telemetry (server, round, players, received_at, payload) VALUES (?, ?, ?, ?, ?)'
    );
    insert.run(server, 8, 1, receivedAt, JSON.stringify(saved));
    insert.run('t6_zombie_town_1', 99, 4, receivedAt, '{malformed');
    insert.run('t6_zombie_farm_1', 99, 4, receivedAt, null);
    db().prepare("DELETE FROM settings WHERE key = 'leaderboard_v1'").run();
    db().pragma('user_version = 0');
    closeDb();
    expect(await matches()).toEqual([
        expect.objectContaining({ highest_round: 8, start_observed: 0 })
    ]);
    expect(await records()).toEqual([
        expect.objectContaining({ kills: 111, headshots: 61, rounds_survived: 0 })
    ]);
    expect(db().prepare("SELECT value FROM settings WHERE key = 'leaderboard_v1'").get()).toEqual({
        value: '1'
    });
    closeDb();
    await report('round_change', 9, [player(undefined, { kills: 150, headshots: 80 })]);
    closeDb();
    expect(await matches()).toHaveLength(1);
    expect(await records()).toEqual([
        expect.objectContaining({ kills: 150, headshots: 80, rounds_survived: 1 })
    ]);
});

it('keeps deleted match identities and starts a separate match when the server name is reused', async () => {
    const { db, closeDb } = await import('../../src/lib/server/db/index.js');
    const { seedServerRegistry } = await import('../../src/lib/server/fleet/servers.js');
    const { serverMatchHistory } = await import('../../src/lib/server/fleet/match-history.js');
    const { getPlayerProfile } = await import('../../src/lib/server/fleet/player-profile.js');
    await report('heartbeat', 8, [player(undefined, { kills: 120 })]);
    const original = serverMatchHistory(server).matches[0];
    db().prepare('DELETE FROM servers WHERE name = ?').run(server);
    await seedServerRegistry();
    // Even the same report bytes must belong to the replacement's own match.
    await report('heartbeat', 8, [player(undefined, { kills: 120 })]);
    closeDb();
    const history = serverMatchHistory(server).matches;
    expect(history).toHaveLength(2);
    expect(history.find((match) => match.id === original.id)).toMatchObject({
        server,
        server_deleted_at: expect.any(String),
        status: 'interrupted'
    });
    expect(history.find((match) => match.id !== original.id)).toMatchObject({
        server,
        server_deleted_at: null,
        status: 'active'
    });
    expect(getPlayerProfile(player().guid)).toMatchObject(emptyProfile);
    await report('game_end', 8, [player(undefined, { kills: 120 })]);
    const profile = getPlayerProfile(player().guid)!;
    expect(profile.stats).toMatchObject({ gamesPlayed: 1, kills: 120 });
    expect(profile.matches).toEqual([
        expect.objectContaining({
            id: history.find((match) => match.id !== original.id)!.id,
            server_deleted_at: null,
            status: 'completed'
        })
    ]);
});

it('does not fabricate players for an empty match', async () => {
    await report('game_start', 0, []);
    await report('game_end', 0, []);
    expect(await records()).toEqual([]);
    expect(await matches()).toEqual([
        expect.objectContaining({ highest_round: 0, status: 'completed' })
    ]);
});

it('rolls back history if writing the latest scoreboard fails', async () => {
    const { db } = await import('../../src/lib/server/db/index.js');
    db().exec(`CREATE TRIGGER reject_scoreboard BEFORE INSERT ON server_telemetry
        BEGIN SELECT RAISE(ABORT, 'scoreboard write failed'); END`);
    await expect(report('round_change', 8, [player(undefined, { kills: 111 })])).rejects.toThrow(
        'scoreboard write failed'
    );
    expect(await records()).toEqual([]);
    expect(await matches()).toEqual([]);
    expect(db().prepare('SELECT COUNT(*) AS count FROM leaderboard_players').get()).toEqual({
        count: 0
    });
});