import { INestApplication } from '@nestjs/common';
import * as fs from 'node:fs/promises';
import * as path from 'node:path';
import { App } from 'supertest/types';
import { PrismaService } from '../src/prisma/prisma.service';
import { AutomationService } from '../src/automation/automation.service';
import { BackupBundle, BackupService } from '../src/backup/backup.service';
import { createTestApp } from './utils/create-test-app';

type Row = Record<string, unknown>;

// Fixtures plus whole-database exports of the shared test database - well
// beyond the 5 s default when other specs run alongside.
const ROUND_TRIP_TIMEOUT_MS = 60_000;

// Wipe order: every row before the rows it references.
const SECTIONS_CHILD_FIRST = [
  'batchMovement',
  'productionInput',
  'shopStockRequest',
  'productionBatch',
  'rawMaterialLot',
  'bottlingBatch',
  'honeyBatchContainerAllocation',
  'honeyBatch',
  'storageContainer',
  'extraction',
  'harvest',
  'veterinaryMedicineMovement',
  'treatment',
  'veterinaryMedicineLot',
  'veterinaryMedicine',
  'complianceAcknowledgement',
  'authorityNotice',
  'complianceSettings',
  'colony',
  'apiaryRestriction',
  'apiary',
  'product',
  'automationSequence',
  'calendarSyncOutboxEntry',
] as const;
type Section = (typeof SECTIONS_CHILD_FIRST)[number];

// AutomationSequence has no id of its own.
function identity(row: Row): string {
  return typeof row.id === 'string'
    ? row.id
    : `${String(row.triggerType)}|${String(row.scope)}`;
}

/**
 * Export -> loss -> import against the real database: production, raw
 * material, stock ledger, number sequence and calendar-sync rows come back
 * exactly as exported, which also proves the import writes every parent
 * before the rows that reference it. Only this spec's own rows are wiped and
 * re-imported, so specs running alongside never see their data rewritten.
 */
describe('Backup round trip (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  let backup: BackupService;
  const suffix = `${Date.now()}-${Math.round(Math.random() * 1e6)}`;
  const own: Record<Section, Set<string>> = Object.fromEntries(
    SECTIONS_CHILD_FIRST.map((section) => [section, new Set<string>()]),
  ) as Record<Section, Set<string>>;
  let userId: string;
  let exported: Record<Section, Row[]>;

  const remember = <T extends { id: string }>(section: Section, row: T): T => {
    own[section].add(row.id);
    return row;
  };

  function ownRows(bundle: BackupBundle): Record<Section, Row[]> {
    return Object.fromEntries(
      SECTIONS_CHILD_FIRST.map((section) => [
        section,
        ((bundle.data[section] ?? []) as Row[]).filter((row) =>
          own[section].has(identity(row)),
        ),
      ]),
    ) as Record<Section, Row[]>;
  }

  beforeAll(async () => {
    app = await createTestApp();
    prisma = app.get(PrismaService);
    backup = app.get(BackupService);
    // Makes sure the number-format rules exist (the sequence references one).
    await app.get(AutomationService).findAll();

    const user = await prisma.user.create({
      data: {
        email: `backup-${suffix}@example.com`,
        passwordHash: 'not-used-for-login',
        name: 'Backup',
        role: { connect: { key: 'BEEKEEPER' } },
      },
    });
    userId = user.id;
    const day = new Date('2026-07-01T00:00:00.000Z');

    const apiary = remember(
      'apiary',
      await prisma.apiary.create({ data: { name: `Stand ${suffix}` } }),
    );
    const harvest = remember(
      'harvest',
      await prisma.harvest.create({
        data: { apiaryId: apiary.id, userId, date: day },
      }),
    );
    const extraction = remember(
      'extraction',
      await prisma.extraction.create({ data: { date: day, userId } }),
    );
    const container = remember(
      'storageContainer',
      await prisma.storageContainer.create({ data: { code: `E-${suffix}` } }),
    );
    const honeyBatch = remember(
      'honeyBatch',
      await prisma.honeyBatch.create({
        data: { batchNumber: `H-${suffix}`, extractionId: extraction.id },
      }),
    );
    remember(
      'honeyBatchContainerAllocation',
      await prisma.honeyBatchContainerAllocation.create({
        data: {
          honeyBatchId: honeyBatch.id,
          storageContainerId: container.id,
          amount: 25,
        },
      }),
    );
    const honey = remember(
      'product',
      await prisma.product.create({ data: { name: `Honig ${suffix}` } }),
    );
    const candle = remember(
      'product',
      await prisma.product.create({
        data: {
          name: `Kerze ${suffix}`,
          kind: 'MANUFACTURED',
          shopCategory: 'KERZEN',
        },
      }),
    );
    const bottling = remember(
      'bottlingBatch',
      await prisma.bottlingBatch.create({
        data: {
          honeyBatchId: honeyBatch.id,
          productId: honey.id,
          date: day,
          jarSize: 500,
          jarCount: 10,
          totalAmount: 5,
          bestBeforeDate: new Date('2028-07-01T00:00:00.000Z'),
          lotNumber: `L-${suffix}`,
          userId,
        },
      }),
    );
    const wax = remember(
      'rawMaterialLot',
      await prisma.rawMaterialLot.create({
        data: {
          kind: 'BEESWAX',
          lotNumber: `W-${suffix}`,
          date: day,
          quantity: 1000,
          apiaryId: apiary.id,
          harvestId: harvest.id,
          userId,
        },
      }),
    );
    const production = remember(
      'productionBatch',
      await prisma.productionBatch.create({
        data: {
          productId: candle.id,
          lotNumber: `K-${suffix}`,
          date: day,
          quantity: 12,
          userId,
        },
      }),
    );
    remember(
      'productionInput',
      await prisma.productionInput.create({
        data: {
          productionBatchId: production.id,
          rawMaterialLotId: wax.id,
          quantity: 300,
        },
      }),
    );
    const shopRequest = remember(
      'shopStockRequest',
      await prisma.shopStockRequest.create({
        data: {
          externalId: `order-${suffix}`,
          kind: 'SALE',
          bottlingBatchId: bottling.id,
          quantity: 2,
          apiKeyId: 'key-not-in-backup',
        },
      }),
    );
    for (const data of [
      {
        bottlingBatchId: bottling.id,
        type: 'SHOP_SALE' as const,
        quantity: -2,
        shopRequestId: shopRequest.id,
        apiKeyId: 'key-not-in-backup',
      },
      {
        rawMaterialLotId: wax.id,
        type: 'CONSUMPTION' as const,
        quantity: -300,
        userId,
      },
      {
        productionBatchId: production.id,
        type: 'WITHDRAWAL' as const,
        quantity: -1,
        reason: 'EIGENBEDARF' as const,
        userId,
      },
    ]) {
      remember('batchMovement', await prisma.batchMovement.create({ data }));
    }
    // T6: catalogue, pack, a treatment booked from it, the ledger rows, the
    // authority notice, the restriction and the acknowledgement.
    const colony = remember(
      'colony',
      await prisma.colony.create({
        data: {
          code: `B-${suffix}`,
          apiaryId: apiary.id,
          colonyType: 'PRODUCTION_COLONY',
        },
      }),
    );
    const medicine = remember(
      'veterinaryMedicine',
      await prisma.veterinaryMedicine.create({
        data: { name: `Mittel ${suffix}`, unit: 'ML', withdrawalPeriodDays: 0 },
      }),
    );
    const medicineLot = remember(
      'veterinaryMedicineLot',
      await prisma.veterinaryMedicineLot.create({
        data: {
          medicineId: medicine.id,
          purchasedOn: day,
          quantity: 100,
          supplier: 'Lieferant',
          userId,
        },
      }),
    );
    const treatment = remember(
      'treatment',
      await prisma.treatment.create({
        data: {
          colonyId: colony.id,
          userId,
          date: day,
          product: `Mittel ${suffix}`,
          medicineId: medicine.id,
          medicineLotId: medicineLot.id,
          doseQuantity: 5,
        },
      }),
    );
    remember(
      'veterinaryMedicineMovement',
      await prisma.veterinaryMedicineMovement.create({
        data: {
          lotId: medicineLot.id,
          type: 'TREATMENT',
          quantity: -5,
          treatmentId: treatment.id,
          userId,
        },
      }),
    );
    remember(
      'veterinaryMedicineMovement',
      await prisma.veterinaryMedicineMovement.create({
        data: {
          lotId: medicineLot.id,
          type: 'DISPOSAL',
          quantity: -2,
          reason: 'Abgelaufen',
          userId,
        },
      }),
    );
    remember(
      'apiaryRestriction',
      await prisma.apiaryRestriction.create({
        data: {
          apiaryId: apiary.id,
          disease: 'Test',
          startsOn: day,
          createdByUserId: userId,
        },
      }),
    );
    remember(
      'authorityNotice',
      await prisma.authorityNotice.create({
        data: {
          kind: 'TSK_REPORT',
          year: 2098,
          referenceDate: day,
          countedAt: day,
          snapshot: { version: 1, totalLiving: 1 },
          totalColonies: 1,
          openKey: `TSK_REPORT:2098:${suffix}`,
          createdByUserId: userId,
        },
      }),
    );
    remember(
      'complianceAcknowledgement',
      await prisma.complianceAcknowledgement.create({
        data: {
          itemKey: 'backup-test',
          subjectId: suffix,
          fingerprint: 'abc',
          note: 'Geprüft und in Ordnung',
          userId,
        },
      }),
    );
    remember(
      'complianceSettings',
      await prisma.complianceSettings.create({
        data: { id: `backup-${suffix}`, registrationNumber: 'R-1' },
      }),
    );
    const sequence = await prisma.automationSequence.create({
      data: {
        triggerType: 'RAW_MATERIAL_LOT_NUMBER_FORMAT',
        scope: `backup-${suffix}`,
        value: 41,
      },
    });
    own.automationSequence.add(identity(sequence));
    remember(
      'calendarSyncOutboxEntry',
      await prisma.calendarSyncOutboxEntry.create({
        data: {
          sourceType: 'TASK',
          sourceId: `backup-${suffix}`,
          status: 'SYNCED',
          graphEventId: `graph-${suffix}`,
        },
      }),
    );
  }, ROUND_TRIP_TIMEOUT_MS);

  afterAll(async () => {
    // The T6 rows reference users and colonies of this spec: remove them,
    // children first, so the shared database does not collect compliance data.
    for (const section of [
      'veterinaryMedicineMovement',
      'treatment',
      'veterinaryMedicineLot',
      'veterinaryMedicine',
      'complianceAcknowledgement',
      'authorityNotice',
      'complianceSettings',
      'apiaryRestriction',
    ] as const) {
      const delegate = prisma[section] as unknown as {
        deleteMany(args: { where: { id: { in: string[] } } }): Promise<unknown>;
      };
      await delegate.deleteMany({ where: { id: { in: [...own[section]] } } });
    }
    await app.close();
  });

  it(
    'exports the production, raw material and stock ledger tables',
    async () => {
      exported = ownRows(await backup.exportAll());

      for (const section of SECTIONS_CHILD_FIRST) {
        expect({ section, count: exported[section].length }).toEqual({
          section,
          count: own[section].size,
        });
      }
    },
    ROUND_TRIP_TIMEOUT_MS,
  );

  it(
    'restores every one of those rows exactly after they were lost',
    async () => {
      for (const section of SECTIONS_CHILD_FIRST) {
        if (section === 'automationSequence') {
          await prisma.automationSequence.deleteMany({
            where: { scope: `backup-${suffix}` },
          });
          continue;
        }
        const delegate = prisma[section] as unknown as {
          deleteMany(args: {
            where: { id: { in: string[] } };
          }): Promise<unknown>;
        };
        await delegate.deleteMany({ where: { id: { in: [...own[section]] } } });
      }
      expect(
        await prisma.batchMovement.count({
          where: { id: { in: [...own.batchMovement] } },
        }),
      ).toBe(0);

      await backup.importAll(
        {
          version: 3,
          exportedAt: new Date().toISOString(),
          data: exported,
        },
        userId,
        { trusted: true },
      );

      const where = (section: Section) => ({
        where: { id: { in: [...own[section]] } },
      });
      expect({
        productionBatch: await prisma.productionBatch.count(
          where('productionBatch'),
        ),
        rawMaterialLot: await prisma.rawMaterialLot.count(
          where('rawMaterialLot'),
        ),
        productionInput: await prisma.productionInput.count(
          where('productionInput'),
        ),
        shopStockRequest: await prisma.shopStockRequest.count(
          where('shopStockRequest'),
        ),
        batchMovement: await prisma.batchMovement.count(where('batchMovement')),
        honeyBatchContainerAllocation:
          await prisma.honeyBatchContainerAllocation.count(
            where('honeyBatchContainerAllocation'),
          ),
        automationSequence: await prisma.automationSequence.count({
          where: { scope: `backup-${suffix}` },
        }),
        calendarSyncOutboxEntry: await prisma.calendarSyncOutboxEntry.count(
          where('calendarSyncOutboxEntry'),
        ),
        veterinaryMedicine: await prisma.veterinaryMedicine.count(
          where('veterinaryMedicine'),
        ),
        veterinaryMedicineLot: await prisma.veterinaryMedicineLot.count(
          where('veterinaryMedicineLot'),
        ),
        treatmentWithPack: await prisma.treatment.count({
          ...where('treatment'),
          where: {
            id: { in: [...own.treatment] },
            medicineLotId: { not: null },
          },
        }),
        veterinaryMedicineMovement:
          await prisma.veterinaryMedicineMovement.count(
            where('veterinaryMedicineMovement'),
          ),
        apiaryRestriction: await prisma.apiaryRestriction.count(
          where('apiaryRestriction'),
        ),
        authorityNotice: await prisma.authorityNotice.count(
          where('authorityNotice'),
        ),
        complianceAcknowledgement: await prisma.complianceAcknowledgement.count(
          where('complianceAcknowledgement'),
        ),
        complianceSettings: await prisma.complianceSettings.count(
          where('complianceSettings'),
        ),
      }).toEqual({
        productionBatch: 1,
        rawMaterialLot: 1,
        productionInput: 1,
        shopStockRequest: 1,
        batchMovement: 3,
        honeyBatchContainerAllocation: 1,
        automationSequence: 1,
        calendarSyncOutboxEntry: 1,
        veterinaryMedicine: 1,
        veterinaryMedicineLot: 1,
        treatmentWithPack: 1,
        veterinaryMedicineMovement: 2,
        apiaryRestriction: 1,
        authorityNotice: 1,
        complianceAcknowledgement: 1,
        complianceSettings: 1,
      });
      expect(ownRows(await backup.exportAll())).toEqual(exported);
    },
    ROUND_TRIP_TIMEOUT_MS,
  );

  it('adds rows from an unsealed file but never rewrites existing ones or takes ledger entries', async () => {
    const existing = await prisma.apiary.create({
      data: { name: `Bestand ${suffix}` },
    });
    const addedId = `apiary-added-${suffix}`;
    const forgedId = `forged-movement-${suffix}`;

    const summary = await backup.importFile(
      {
        version: 2,
        exportedAt: '2026-01-01T00:00:00.000Z',
        data: {
          apiary: [
            { id: existing.id, name: 'Überschrieben' },
            { id: addedId, name: `Ergänzt ${suffix}` },
          ],
          batchMovement: [
            {
              id: forgedId,
              productionBatchId: [...own.productionBatch][0],
              type: 'CORRECTION',
              quantity: 1000,
            },
          ],
        },
      },
      userId,
    );

    expect(summary).toEqual(
      expect.objectContaining({ sealed: false, skipped: ['batchMovement'] }),
    );
    expect(
      (await prisma.apiary.findUniqueOrThrow({ where: { id: existing.id } }))
        .name,
    ).toBe(`Bestand ${suffix}`);
    expect(
      (await prisma.apiary.findUniqueOrThrow({ where: { id: addedId } })).name,
    ).toBe(`Ergänzt ${suffix}`);
    expect(
      await prisma.batchMovement.findUnique({ where: { id: forgedId } }),
    ).toBeNull();
  });

  it('takes no T6 compliance table from an unsealed file and reports them', async () => {
    const medicineId = `medicine-forged-${suffix}`;
    const noticeId = `notice-forged-${suffix}`;

    const summary = await backup.importFile(
      {
        version: 2,
        exportedAt: '2026-01-01T00:00:00.000Z',
        data: {
          veterinaryMedicine: [
            { id: medicineId, name: 'Gefälscht', unit: 'ML' },
          ],
          authorityNotice: [
            {
              id: noticeId,
              kind: 'REGISTRATION',
              referenceDate: '2026-01-01T00:00:00.000Z',
              countedAt: '2026-01-01T00:00:00.000Z',
              snapshot: {},
              totalColonies: 1,
            },
          ],
        },
      },
      userId,
    );

    expect([...(summary.skipped ?? [])].sort()).toEqual([
      'authorityNotice',
      'veterinaryMedicine',
    ]);
    expect(
      await prisma.veterinaryMedicine.findUnique({ where: { id: medicineId } }),
    ).toBeNull();
    expect(
      await prisma.authorityNotice.findUnique({ where: { id: noticeId } }),
    ).toBeNull();
  });

  it('removes the file a restored document row replaced', async () => {
    const directory = path.join(
      path.resolve(process.env.DOCUMENTS_STORAGE_PATH ?? './uploads'),
      'colony',
    );
    await fs.mkdir(directory, { recursive: true });
    const oldFile = path.join(directory, `backup-e2e-${suffix}.pdf`);
    await fs.writeFile(oldFile, '%PDF-1.4 old');
    const document = await prisma.document.create({
      data: {
        entityType: 'COLONY',
        entityId: `colony-${suffix}`,
        fileName: 'alt.pdf',
        mimeType: 'application/pdf',
        sizeBytes: 12,
        storagePath: oldFile,
      },
    });

    await backup.importAll(
      {
        version: 3,
        exportedAt: new Date().toISOString(),
        data: {
          document: [
            {
              id: document.id,
              entityType: 'COLONY',
              entityId: `colony-${suffix}`,
              fileName: 'neu.pdf',
              mimeType: 'application/pdf',
              sizeBytes: 12,
              contentBase64: Buffer.from('%PDF-1.4 new').toString('base64'),
            },
          ],
        },
      },
      userId,
      { trusted: true },
    );

    const restored = await prisma.document.findUniqueOrThrow({
      where: { id: document.id },
    });
    expect(restored.storagePath).not.toBe(oldFile);
    await expect(fs.readFile(restored.storagePath, 'utf8')).resolves.toBe(
      '%PDF-1.4 new',
    );
    await expect(fs.access(oldFile)).rejects.toThrow();
    await fs.unlink(restored.storagePath);
  });
});