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

let fixture: Fixture;
let handle: Database.Database;
const clock = '2026-10-17T12:00:00.000Z';
const server = 't5_zombie_theater_1';

beforeEach(async () => {
    vi.resetModules();
    vi.useFakeTimers({ toFake: ['Date'] });
    vi.setSystemTime(new Date(clock));
    fixture = await newFixture([server]);
    const { seedServerRegistry } = await import('../../src/lib/server/fleet/servers.js');
    await seedServerRegistry();
    const { db } = await import('../../src/lib/server/db/index.js');
    handle = db();
    handle
        .prepare(
            `INSERT INTO auth_users(id,username,display_name,password_hash,role,created_at,updated_at)
            VALUES('moderator','moderator','moderator','unused','moderator',0,0)`
        )
        .run();
});

afterEach(async () => {
    vi.useRealTimers();
    await fixture.cleanup();
});

async function mutate(input: Record<string, unknown>) {
    const { mutateModeration } = await import('../../src/lib/server/moderation/actions.js');
    return mutateModeration('moderator', { idempotencyKey: randomUUID(), ...input });
}

async function detail(id: string) {
    const { moderationCaseDetail } = await import('../../src/lib/server/moderation/cases.js');
    return moderationCaseDetail('moderator', id);
}

async function create(overrides: Record<string, unknown> = {}) {
    return mutate({
        op: 'create-case',
        game: 't5',
        guid: '123',
        title: 'Review archived conversation',
        ...overrides
    });
}

async function archive(messages: Array<{ guid?: string; message: string }>) {
    const { saveTelemetry } = await import('../../src/lib/server/fleet/telemetry.js');
    const { matchChatTimeline } = await import('../../src/lib/server/fleet/chat.js');
    saveTelemetry({
        server,
        map: 'zombie_theater',
        event: 'game_start',
        players: [{ guid: '123', name: 'Subject' }],
        receivedAt: clock
    });
    const { id: matchId } = handle.prepare('SELECT id FROM leaderboard_matches').get() as {
        id: number;
    };
    const insert = handle.prepare('INSERT INTO match_chat VALUES(?,?,?,?)');
    for (const [index, message] of messages.entries())
        insert.run(
            matchId,
            `message-${index}`,
            1,
            JSON.stringify({
                type: 'message',
                context: { realTime: null, matchElapsedMs: null, round: null },
                message: {
                    time: '1:01',
                    guid: message.guid ?? '123',
                    slot: message.guid ? 2 : 1,
                    player: message.guid ? 'Witness' : 'Subject',
                    message: message.message
                }
            })
        );
    return { matchId, entries: matchChatTimeline(matchId) };
}

it('rejects a witness-only selection, foreign archive IDs and another game without changing a case', async () => {
    const { matchId, entries } = await archive([
        { message: 'Subject statement' },
        { guid: '456', message: 'Witness reply' }
    ]);
    const { id } = await create();
    const before = await detail(id);
    for (const messageIds of [
        [entries[1].messageId],
        [`${matchId + 1}:message-0:1`],
        [entries[0].messageId, `${matchId + 1}:message-1:1`]
    ])
        await expect(
            mutate({ op: 'attach-evidence', id, revision: 1, evidence: { matchId, messageIds } })
        ).rejects.toMatchObject({ status: expect.any(Number) });
    expect(await detail(id)).toEqual(before);

    const other = await create({ game: 't6' });
    await expect(
        mutate({
            op: 'attach-evidence',
            id: other.id,
            revision: 1,
            evidence: { matchId, messageIds: [entries[0].messageId] }
        })
    ).rejects.toMatchObject({ status: 404 });
    expect((await detail(other.id)).case).toMatchObject({ revision: 1, evidence: [] });
});

it('allows a new witness reply alongside an attached subject and deduplicates later selections', async () => {
    const { matchId, entries } = await archive([
        { message: 'Subject statement' },
        { guid: '456', message: 'Witness reply' }
    ]);
    const [subjectId, witnessId] = entries.map((entry) => entry.messageId!);
    const { id } = await create();
    await mutate({
        op: 'attach-evidence',
        id,
        revision: 1,
        evidence: { matchId, messageIds: [subjectId], contextBefore: 0, contextAfter: 0 }
    });
    const request = {
        op: 'attach-evidence',
        id,
        revision: 2,
        evidence: {
            matchId,
            messageIds: [witnessId, subjectId, witnessId],
            contextBefore: 0,
            contextAfter: 0
        },
        idempotencyKey: randomUUID()
    };
    await mutate(request);
    await mutate(request);
    const attached = await detail(id);
    expect(attached.case.revision).toBe(3);
    expect(attached.case.evidence).toHaveLength(2);
    const snapshot = JSON.parse(attached.case.evidence[1].snapshot!);
    expect(snapshot.selectedMessageIds).toEqual([witnessId]);
    expect(snapshot.highlightedMessageIds).toEqual([subjectId]);
    expect(snapshot.entries.map((entry: { messageId: string }) => entry.messageId)).toEqual([
        subjectId,
        witnessId
    ]);
    expect(snapshot.entries[1].message.guid).toBe('456');
    await mutate({ ...request, revision: 3, idempotencyKey: randomUUID() });
    expect(await detail(id)).toEqual(attached);
});

it('validates selection and context bounds and rolls back opening a case with invalid evidence', async () => {
    const { matchId, entries } = await archive([{ message: 'Subject statement' }]);
    const messageId = entries[0].messageId!;
    const invalid = [
        { messageIds: [] },
        { messageIds: Array.from({ length: 101 }, () => messageId) },
        { messageIds: [messageId], contextBefore: -1 },
        { messageIds: [messageId], contextAfter: 21 },
        { messageIds: [messageId], contextBefore: 1.5 },
        { messageIds: [messageId], contextAfter: '3' }
    ];
    for (const evidence of invalid)
        await expect(create({ evidence: { matchId, ...evidence } })).rejects.toMatchObject({
            status: 400
        });
    expect(handle.prepare('SELECT COUNT(*) AS count FROM moderation_cases').get()).toEqual({
        count: 0
    });
    expect(handle.prepare('SELECT COUNT(*) AS count FROM moderation_events').get()).toEqual({
        count: 0
    });
    expect(handle.prepare('SELECT COUNT(*) AS count FROM moderation_requests').get()).toEqual({
        count: 0
    });
});

it('rolls back a legacy bulk attachment if the case reaches its evidence limit partway through', async () => {
    const { matchId } = await archive([
        { message: 'Repeated statement' },
        { message: 'Repeated statement' },
        { message: 'Repeated statement' }
    ]);
    const { id } = await create();
    const insert = handle.prepare('INSERT INTO moderation_evidence VALUES(?,?,?,?,?,?,?,?)');
    for (let index = 0; index < 99; index++)
        insert.run(
            randomUUID(),
            id,
            `Note ${index}`,
            'Staff note',
            null,
            'moderator',
            'moderator',
            clock
        );
    const before = await detail(id);
    const idempotencyKey = randomUUID();
    await expect(
        mutate({
            op: 'attach-evidence',
            id,
            revision: 1,
            evidence: { matchId, message: 'Repeated statement' },
            idempotencyKey
        })
    ).rejects.toMatchObject({ status: 409 });
    expect(await detail(id)).toEqual(before);
    expect(
        handle
            .prepare('SELECT COUNT(*) AS count FROM moderation_requests WHERE request_key=?')
            .get(idempotencyKey)
    ).toEqual({ count: 0 });
});