import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import type Database from 'better-sqlite3';
import { newFixture, type Fixture } from '../helpers/fixture.js';

let fixture: Fixture;
beforeEach(async () => { vi.resetModules(); fixture = await newFixture([]); });
afterEach(async () => { await fixture.cleanup(); });

function seed(handle: Database.Database, id: number, players: number | null, options: {
    guid?: string; round?: number; game?: string; map?: string; mapName?: string; status?: string; hasStats?: number;
} = {}) {
    const { guid = 'ace', round = 20, game = 't5', map = 'theater', mapName = 'Kino Der Toten', status = 'completed', hasStats = 1 } = options;
    const timestamp = new Date(Date.UTC(2026, 9, 1, 0, id)).toISOString();
    handle.prepare(`INSERT INTO leaderboard_matches
        (id,server,game,map,map_key,map_name,started_at,ended_at,last_received_at,status,start_players,highest_round,last_event,last_fingerprint)
        VALUES (?,'removed-server',?,?,?,?,?,?,?,?,?,?,'game_end','fixture')`)
        .run(id, game, map, `${game}:${map}`, mapName, timestamp, timestamp, timestamp, status, players, round);
    handle.prepare(`INSERT OR IGNORE INTO leaderboard_players(game,guid,name,first_seen_at,last_seen_at) VALUES(?,?,?,?,?)`)
        .run(game, guid, guid, timestamp, timestamp);
    handle.prepare(`INSERT INTO leaderboard_match_players
        (match_id,guid,highest_round,kills,best_score,rounds_survived,has_stats,completed,first_seen_at,last_seen_at)
        VALUES(?,?,?,100,1000,?, ?,1,?,?)`).run(id, guid, round, round, hasStats, timestamp, timestamp);
}

describe('leaderboard starting-player scopes', () => {
    it('separates each squad and its cache, with unknown starts available only in All players', async () => {
        const { db } = await import('../../src/lib/server/db/index.js');
        seed(db(), 1, null);
        for (const players of [1, 2, 3, 4] as const) seed(db(), players + 1, players, { round: players < 3 ? 20 : players * 10 });
        seed(db(), 6, 1, { guid: 'blake', round: 30 });
        seed(db(), 7, 2, { guid: 'blake', round: 10 });
        seed(db(), 8, null, { guid: 'legacy', round: 99 });
        const { getLeaderboard, getPlayerLeaderboardEntry } = await import('../../src/lib/server/fleet/leaderboard.js');
        const all = getLeaderboard();
        expect(all).toMatchObject({ total: 3, summary: { matches: 8, highestRound: 99 } });
        for (const players of [1, 2, 3, 4, 2, 1] as const) {
            const board = getLeaderboard({ players });
            expect(board.summary.matches).toBe(players < 3 ? 2 : 1);
            expect(board.entries.some(entry => entry.guid === 'legacy')).toBe(false);
            const ace = board.entries.find(entry => entry.guid === 'ace')!;
            expect(ace.gamesPlayed).toBe(1);
            expect(ace.rank).toBe(players === 1 ? 2 : 1);
            // All three equal-valued records must come from this squad, not
            // the earlier unknown-start or solo match with matching values.
            for (const record of Object.values(ace.records)) expect(record.matchId).toBe(players + 1);
            expect(getPlayerLeaderboardEntry('ace', { players })).toEqual(ace);
        }
        expect(getLeaderboard()).toEqual(all);
    });

    it('filters profile history and rank while keeping explicitly lifetime records intact', async () => {
        const { db } = await import('../../src/lib/server/db/index.js');
        for (let id = 1; id <= 30; id++) seed(db(), id, 2);
        seed(db(), 31, 1, { round: 40 }); seed(db(), 32, null, { round: 99 });
        const { getPlayerProfile } = await import('../../src/lib/server/fleet/player-profile.js');
        const lifetime = getPlayerProfile('ace')!;
        const first = getPlayerProfile('ace', 0, { players: 2 })!;
        const last = getPlayerProfile('ace', 999, { players: 2, map: 't5:theater', game: 't5' })!;
        expect(first).toMatchObject({ matchesTotal: 30, offset: 0 }); expect(first.matches).toHaveLength(25);
        expect(last).toMatchObject({ matchesTotal: 30, offset: 25 }); expect(last.matches).toHaveLength(5);
        expect(new Set([...first.matches, ...last.matches].map(match => match.id))).toEqual(new Set(Array.from({ length: 30 }, (_, i) => i + 1)));
        expect(first.stats).toEqual(lifetime.stats); expect(first.records).toEqual(lifetime.records); expect(first.maps).toEqual(lifetime.maps);
        expect(getPlayerProfile('ace', 25, { players: 4 })).toMatchObject({ matchesTotal: 0, matches: [], offset: 0, stats: lifetime.stats });
        const { load } = await import('../../src/routes/leaderboard/players/[guid]/+page.server.js');
        const scoped = await load({ params: { guid: 'ace' }, url: new URL('http://localhost/leaderboard/players/ace?players=2&map=t5%3Atheater') });
        expect(scoped).toMatchObject({ profile: { matchesTotal: 30, stats: { gamesPlayed: 32, highestRound: 99 } },
            scope: { players: '2', entry: { gamesPlayed: 30, highestRound: 20, records: { highestRound: { matchId: 1 } } } } });
    });

    it('keeps API absent-map searches global while filtering all contributions by the selected squad', async () => {
        const { db } = await import('../../src/lib/server/db/index.js');
        seed(db(), 1, 2); seed(db(), 2, 2, { map: 'moon', mapName: 'Moon' }); seed(db(), 3, null, { round: 99 });
        const { GET } = await import('../../src/routes/api/leaderboard/+server.js');
        expect(await (await GET({ url: new URL('http://localhost/api/leaderboard?players=2') })).json())
            .toMatchObject({ summary: { matches: 2, highestRound: 20 }, entries: [{ gamesPlayed: 2 }] });
        expect(await (await GET({ url: new URL('http://localhost/api/leaderboard') })).json())
            .toMatchObject({ summary: { matches: 3, highestRound: 99 } });
        for (const players of ['0', '5', '', '2.0', '-1', 'two', '01']) {
            const response = await GET({ url: new URL(`http://localhost/api/leaderboard?players=${players}`) });
            expect(response.status).toBe(400);
        }
        const { load } = await import('../../src/routes/leaderboard/players/[guid]/+page.server.js');
        await expect(load({ params: { guid: 'ace' }, url: new URL('http://localhost/leaderboard/players/ace?players=5') }))
            .rejects.toMatchObject({ status: 400 });
    });
});