import assert from 'node:assert/strict';
import { after, before, describe, it } from 'node:test';
import { startTestDatabase, type TestDatabase } from './harness.js';

type Imports = typeof import('../src/services/imports.js');
type Credits = typeof import('../src/services/credits.js');
type Db = typeof import('../src/db.js');

let database: TestDatabase;
let imports: Imports;
let credits: Credits;
let db: Db;
let ctx: { actorId: number; actorName: string };

const CSV = [
  'Bestellnummer;Steam-ID;Spielername;Produkt;Kaufdatum',
  'A-1001;76561198000000001;Rabe;CC-Paket Gross;2025-01-15',
  'A-1002;76561198000000002;Fuchs;Redesign Gutschein;2025-01-16',
  'A-1003;76561198000000001;Rabe;Spielerfarbe Blau;2025-01-17',
  'A-1004;76561198000000003;Dachs;CC-Paket Klein;2025-01-18',
].join('\n');

const MAPPING = {
  playerKey: 'Steam-ID',
  playerName: 'Spielername',
  product: 'Produkt',
  orderId: 'Bestellnummer',
  purchasedAt: 'Kaufdatum',
  createMissingPlayers: true,
};

before(async () => {
  database = await startTestDatabase(54332);
  process.env.DATABASE_URL = database.url;
  process.env.SESSION_SECRET = 'test-secret-that-is-long-enough-000000';
  process.env.NODE_ENV = 'test';

  db = await import('../src/db.js');
  imports = await import('../src/services/imports.js');
  credits = await import('../src/services/credits.js');

  const user = await db.prisma.user.create({
    data: { username: 'importeur', passwordHash: 'x', role: 'ADMIN' },
  });
  ctx = { actorId: user.id, actorName: user.username };

  await db.prisma.productMapping.createMany({
    data: [
      { matchPattern: 'cc-paket', target: 'CC_PACKAGE', priority: 10 },
      { matchPattern: 'redesign', target: 'REDESIGN_PACKAGE', priority: 20 },
      { matchPattern: 'spielerfarbe', target: 'IGNORE', priority: 30 },
    ],
  });
});

after(async () => {
  await db.prisma.$disconnect();
  await database.stop();
});

describe('Datei einlesen', () => {
  it('erkennt Semikolon als Trennzeichen', () => {
    const parsed = imports.parseUpload('export.csv', Buffer.from(CSV, 'utf8'));

    assert.equal(parsed.rows.length, 4);
    assert.deepEqual(parsed.columns, [
      'Bestellnummer',
      'Steam-ID',
      'Spielername',
      'Produkt',
      'Kaufdatum',
    ]);
  });

  it('liest auch JSON-Listen', () => {
    const json = JSON.stringify([{ order: 'B-1', product: 'CC-Paket', user: '765' }]);
    const parsed = imports.parseUpload('export.json', Buffer.from(json, 'utf8'));

    assert.equal(parsed.rows.length, 1);
    assert.equal(parsed.rows[0]?.product, 'CC-Paket');
  });

  it('weist eine leere Datei ab', () => {
    assert.throws(() => imports.parseUpload('leer.csv', Buffer.from('', 'utf8')));
  });
});

describe('Vorschau und Buchung', () => {
  it('ordnet jede Zeile ihrem Plan zu', async () => {
    const parsed = imports.parseUpload('export.csv', Buffer.from(CSV, 'utf8'));
    const importId = await imports.createImport('export.csv', parsed, ctx);

    const summary = await imports.applyMapping(importId, MAPPING, ctx);

    assert.equal(summary.CREATE_PLAYER_AND_BOOK, 3, 'drei neue Spieler mit gueltigem Produkt');
    assert.equal(summary.SKIP_IGNORED, 1, 'die Spielerfarbe wird ignoriert');
    assert.equal(summary.SKIP_DUPLICATE, 0);
  });

  it('bucht CC-Pakete mit beiden Guthaben und legt Spieler an', async () => {
    const parsed = imports.parseUpload('export.csv', Buffer.from(CSV, 'utf8'));
    const importId = await imports.createImport('lauf1.csv', parsed, ctx);
    await imports.applyMapping(importId, MAPPING, ctx);

    const result = await imports.commitImport(importId, ctx);

    assert.equal(result.booked, 3);
    assert.equal(result.createdPlayers, 3);

    const rabe = await db.prisma.player.findUniqueOrThrow({
      where: { steamId: '76561198000000001' },
    });
    const balances = await credits.getBalances(rabe.id);

    assert.equal(balances.CC, 1, 'CC-Paket gibt einen CC');
    assert.equal(balances.REDESIGN_PAID, 1, 'und das inklusive Redesign');

    const fuchs = await db.prisma.player.findUniqueOrThrow({
      where: { steamId: '76561198000000002' },
    });
    const fuchsBalances = await credits.getBalances(fuchs.id);

    assert.equal(fuchsBalances.CC, 0, 'ein Redesign-Paket gibt keinen CC');
    assert.equal(fuchsBalances.REDESIGN_PAID, 1);
  });

  it('bucht dieselbe Bestell-ID kein zweites Mal', async () => {
    const parsed = imports.parseUpload('export.csv', Buffer.from(CSV, 'utf8'));
    const importId = await imports.createImport('lauf2.csv', parsed, ctx);

    const summary = await imports.applyMapping(importId, MAPPING, ctx);

    assert.equal(summary.SKIP_DUPLICATE, 3, 'alle bereits gebuchten Bestellungen');
    assert.equal(summary.BOOK, 0);
    assert.equal(summary.CREATE_PLAYER_AND_BOOK, 0);

    await assert.rejects(
      () => imports.commitImport(importId, ctx),
      (error: Error & { code?: string }) => error.code === 'NOTHING_TO_BOOK',
    );
  });

  it('erkennt Dubletten auch innerhalb einer Datei', async () => {
    const doubled = [
      'Bestellnummer;Steam-ID;Produkt',
      'C-1;76561198000000009;CC-Paket',
      'C-1;76561198000000009;CC-Paket',
    ].join('\n');

    const parsed = imports.parseUpload('doppelt.csv', Buffer.from(doubled, 'utf8'));
    const importId = await imports.createImport('doppelt.csv', parsed, ctx);

    const summary = await imports.applyMapping(
      importId,
      {
        playerKey: 'Steam-ID',
        product: 'Produkt',
        orderId: 'Bestellnummer',
        createMissingPlayers: true,
      },
      ctx,
    );

    assert.equal(summary.CREATE_PLAYER_AND_BOOK, 1);
    assert.equal(summary.SKIP_DUPLICATE, 1);
  });

  it('ueberspringt unbekannte Spieler, wenn sie nicht angelegt werden sollen', async () => {
    const csv = ['Bestellnummer;Steam-ID;Produkt', 'D-1;76561198000009999;CC-Paket'].join('\n');
    const parsed = imports.parseUpload('fremd.csv', Buffer.from(csv, 'utf8'));
    const importId = await imports.createImport('fremd.csv', parsed, ctx);

    const summary = await imports.applyMapping(
      importId,
      {
        playerKey: 'Steam-ID',
        product: 'Produkt',
        orderId: 'Bestellnummer',
        createMissingPlayers: false,
      },
      ctx,
    );

    assert.equal(summary.SKIP_NO_PLAYER, 1);
  });

  it('ein abgeschlossener Import laesst sich nicht erneut buchen', async () => {
    const csv = ['Bestellnummer;Steam-ID;Produkt', 'E-1;76561198000000001;CC-Paket'].join('\n');
    const parsed = imports.parseUpload('nochmal.csv', Buffer.from(csv, 'utf8'));
    const importId = await imports.createImport('nochmal.csv', parsed, ctx);
    await imports.applyMapping(
      importId,
      { playerKey: 'Steam-ID', product: 'Produkt', orderId: 'Bestellnummer', createMissingPlayers: false },
      ctx,
    );
    await imports.commitImport(importId, ctx);

    await assert.rejects(
      () => imports.commitImport(importId, ctx),
      (error: Error & { code?: string }) => error.code === 'NOT_PENDING',
    );
  });
});