import { INestApplication } from '@nestjs/common';
import * as bcrypt from 'bcryptjs';
import request from 'supertest';
import { App } from 'supertest/types';
import { PrismaService } from '../src/prisma/prisma.service';
import { createTestApp } from './utils/create-test-app';
import { login } from './utils/api';
import { drainDomainEvents } from './utils/domain-events';

/**
 * Regression tests for data-integrity rules that cut across modules:
 * repeated requests, concurrent quantity bookings, colony/queen state
 * transitions and duplicate automation tasks.
 */
describe('Data integrity (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  const suffix = `${Date.now()}-${Math.round(Math.random() * 1e6)}`;
  const email = `integrity-e2e-${suffix}@example.com`;
  const password = 'SuperSecret123!';
  let token: string;
  let userId: string;
  let apiaryId: string;

  const server = () => app.getHttpServer();
  const auth = () => ({ Authorization: `Bearer ${token}` });

  async function createColony(
    code: string,
    status: 'ACTIVE' | 'QUEENLESS' | 'WEAK' = 'ACTIVE',
  ) {
    return prisma.colony.create({
      data: {
        code: `${code}-${suffix}`,
        apiaryId,
        colonyType: 'PRODUCTION_COLONY',
        status,
      },
    });
  }

  async function createHoneyBatch(amount: number) {
    const extraction = await prisma.extraction.create({
      data: { date: new Date(), userId },
    });
    return prisma.honeyBatch.create({
      data: {
        batchNumber: `HB-${suffix}-${Math.round(Math.random() * 1e9)}`,
        extractionId: extraction.id,
        amount,
        initialAmount: amount,
      },
    });
  }

  function bottle(honeyBatchId: string, jarCount: number) {
    return request(server())
      .post('/api/v1/bottling-batches')
      .set(auth())
      .send({
        honeyBatchId,
        date: '2026-08-01T00:00:00.000Z',
        bestBeforeDate: '2028-08-01T00:00:00.000Z',
        jarSize: 500,
        jarCount,
        lotNumber: `L-${suffix}-${Math.round(Math.random() * 1e9)}`,
      });
  }

  beforeAll(async () => {
    app = await createTestApp();
    prisma = app.get(PrismaService);
    const user = await prisma.user.create({
      data: {
        email,
        passwordHash: await bcrypt.hash(password, 12),
        name: 'Integrity',
        role: { connect: { key: 'ADMIN' } },
      },
    });
    userId = user.id;
    token = (await login(app, email, password)).accessToken;
    apiaryId = (
      await prisma.apiary.create({ data: { name: `Integrity ${suffix}` } })
    ).id;
  });

  afterAll(async () => {
    // The events this file's requests recorded (all by its own user) and
    // the follow-up events their handlers recorded under the same
    // correlation id - other e2e files share the database.
    if (userId) {
      const correlationIds = (
        await prisma.domainEvent.findMany({
          where: { actorUserId: userId },
          select: { correlationId: true },
          distinct: ['correlationId'],
        })
      ).map((event) => event.correlationId);
      await prisma.domainEvent.deleteMany({
        where: { correlationId: { in: correlationIds } },
      });
    }
    await app.close();
  });

  describe('Idempotency-Key', () => {
    it('stores a repeated inspection only once and replays the first response', async () => {
      const colony = await createColony('IDEM');
      const key = `idem-${suffix}-inspection-0001`;
      const body = {
        colonyId: colony.id,
        date: '2026-07-01T00:00:00.000Z',
        queenSeen: false,
        eggsPresent: false,
      };

      const first = await request(server())
        .post('/api/v1/inspections')
        .set(auth())
        .set('Idempotency-Key', key)
        .send(body)
        .expect(201);
      const second = await request(server())
        .post('/api/v1/inspections')
        .set(auth())
        .set('Idempotency-Key', key)
        .send(body)
        .expect(201);

      expect((second.body as { id: string }).id).toBe(
        (first.body as { id: string }).id,
      );
      expect(
        await prisma.inspection.count({ where: { colonyId: colony.id } }),
      ).toBe(1);
      await drainDomainEvents(app, [(first.body as { id: string }).id]);
      // The automation fired once, not once per delivery attempt.
      expect(
        await prisma.suggestion.count({
          where: { colonyId: colony.id, source: 'RULE' },
        }),
      ).toBe(1);
    });

    it('rejects a key reused for a different endpoint', async () => {
      const colony = await createColony('IDEM2');
      const key = `idem-${suffix}-crossuse-0001`;
      await request(server())
        .post('/api/v1/inspections')
        .set(auth())
        .set('Idempotency-Key', key)
        .send({ colonyId: colony.id, date: '2026-07-01T00:00:00.000Z' })
        .expect(201);
      await request(server())
        .post('/api/v1/feedings')
        .set(auth())
        .set('Idempotency-Key', key)
        .send({
          colonyId: colony.id,
          date: '2026-07-01T00:00:00.000Z',
          feedType: 'SUGAR_WATER',
          amount: 2,
          unit: 'l',
        })
        .expect(409);
    });

    it('ignores the header on endpoints that did not opt in, storing nothing', async () => {
      const key = `idem-${suffix}-not-opted-in`;
      await request(server())
        .post('/api/v1/apiaries')
        .set(auth())
        .set('Idempotency-Key', key)
        .send({ name: `Opt-out ${suffix}` })
        .expect(201);
      expect(
        await prisma.idempotencyRecord.count({ where: { userId, key } }),
      ).toBe(0);
    });

    it('rejects a malformed key', () => {
      return request(server())
        .post('/api/v1/inspections')
        .set(auth())
        .set('Idempotency-Key', 'short')
        .send({})
        .expect(400);
    });

    it('releases the key when the request failed, so a corrected retry works', async () => {
      const colony = await createColony('IDEM3');
      const key = `idem-${suffix}-retry-00001`;
      await request(server())
        .post('/api/v1/inspections')
        .set(auth())
        .set('Idempotency-Key', key)
        .send({ colonyId: colony.id })
        .expect(400);
      await request(server())
        .post('/api/v1/inspections')
        .set(auth())
        .set('Idempotency-Key', key)
        .send({ colonyId: colony.id, date: '2026-07-01T00:00:00.000Z' })
        .expect(201);
    });
  });

  describe('Bottling quantities', () => {
    it('never over-books a honey batch under concurrent bottlings', async () => {
      const honeyBatch = await createHoneyBatch(10);
      // Each takes 6 kg of 10 kg - only one of them may succeed.
      const results = await Promise.all([
        bottle(honeyBatch.id, 12),
        bottle(honeyBatch.id, 12),
      ]);
      const statuses = results.map((r) => r.status).sort();
      expect(statuses).toEqual([201, 400]);
      const after = await prisma.honeyBatch.findUniqueOrThrow({
        where: { id: honeyBatch.id },
      });
      expect(after.amount).toBeCloseTo(4, 3);
      const bookings = await prisma.batchMovement.findMany({
        where: { honeyBatchId: honeyBatch.id },
      });
      expect(bookings.map((booking) => booking.quantity)).toEqual([-6000]);
    });

    it('gives the amount back when a bottling is removed', async () => {
      const honeyBatch = await createHoneyBatch(5);
      const created = await bottle(honeyBatch.id, 3).expect(201);
      await request(server())
        .delete(
          `/api/v1/bottling-batches/${(created.body as { id: string }).id}`,
        )
        .set(auth())
        .expect(200);
      const after = await prisma.honeyBatch.findUniqueOrThrow({
        where: { id: honeyBatch.id },
      });
      expect(after.amount).toBeCloseTo(5, 3);
    });
  });

  describe('Stock movements', () => {
    it('refuses an outgoing movement larger than the stock', async () => {
      const item = await prisma.stockItem.create({
        data: {
          name: `Gläser ${suffix}`,
          category: 'CONSUMABLE',
          unit: 'Stk',
          quantity: 5,
        },
      });
      await request(server())
        .post(`/api/v1/stock-items/${item.id}/movements`)
        .set(auth())
        .send({ type: 'OUT', quantity: 6 })
        .expect(400);
      const after = await prisma.stockItem.findUniqueOrThrow({
        where: { id: item.id },
      });
      expect(after.quantity).toBe(5);
    });

    it('proposes only one open reorder while the item stays below minimum', async () => {
      const item = await prisma.stockItem.create({
        data: {
          name: `Deckel ${suffix}`,
          category: 'CONSUMABLE',
          unit: 'Stk',
          quantity: 10,
          minThreshold: 8,
        },
      });
      for (const quantity of [3, 1, 1]) {
        await request(server())
          .post(`/api/v1/stock-items/${item.id}/movements`)
          .set(auth())
          .send({ type: 'OUT', quantity })
          .expect(201);
      }
      expect(
        await prisma.suggestion.count({
          where: {
            relatedId: item.id,
            ruleKey: 'STOCK_ITEM_LOW',
            status: 'OPEN',
          },
        }),
      ).toBe(1);
    });
  });

  describe('Colony transitions', () => {
    it('lets a queenless colony be united with another colony', async () => {
      const survivor = await createColony('SURV');
      const queenless = await createColony('QL', 'QUEENLESS');
      await request(server())
        .post(`/api/v1/colonies/${survivor.id}/merge`)
        .set(auth())
        .send({ mergedColonyIds: [queenless.id] })
        .expect(201);
      const merged = await prisma.colony.findUniqueOrThrow({
        where: { id: queenless.id },
      });
      expect(merged.status).toBe('MERGED');
    });

    it('lets a weak colony be moved to another apiary', async () => {
      const weak = await createColony('WEAK', 'WEAK');
      const otherApiary = await prisma.apiary.create({
        data: { name: `Other ${suffix}` },
      });
      await request(server())
        .post(`/api/v1/colonies/${weak.id}/move`)
        .set(auth())
        .send({ apiaryId: otherApiary.id })
        .expect(201);
    });

    it('refuses to merge a colony into itself', async () => {
      const colony = await createColony('SELF');
      await request(server())
        .post(`/api/v1/colonies/${colony.id}/merge`)
        .set(auth())
        .send({ mergedColonyIds: [colony.id] })
        .expect(400);
      const after = await prisma.colony.findUniqueOrThrow({
        where: { id: colony.id },
      });
      expect(after.status).toBe('ACTIVE');
    });

    it('refuses to dissolve a colony that is already dissolved', async () => {
      const colony = await createColony('DISS');
      await request(server())
        .post(`/api/v1/colonies/${colony.id}/dissolve`)
        .set(auth())
        .expect(201);
      await request(server())
        .post(`/api/v1/colonies/${colony.id}/dissolve`)
        .set(auth())
        .expect(409);
    });
  });

  describe('Queen assignment', () => {
    it('moves a queen between colonies and leaves the old colony queenless', async () => {
      const colonyA = await createColony('QA');
      const colonyB = await createColony('QB', 'QUEENLESS');
      const queen = await prisma.queen.create({
        data: { code: `Q-${suffix}` },
      });

      await request(server())
        .post(`/api/v1/queens/${queen.id}/assign-colony`)
        .set(auth())
        .send({ colonyId: colonyA.id })
        .expect(201);
      await request(server())
        .post(`/api/v1/queens/${queen.id}/assign-colony`)
        .set(auth())
        .send({ colonyId: colonyB.id })
        .expect(201);

      const a = await prisma.colony.findUniqueOrThrow({
        where: { id: colonyA.id },
      });
      const b = await prisma.colony.findUniqueOrThrow({
        where: { id: colonyB.id },
      });
      expect(a.currentQueenId).toBeNull();
      expect(a.status).toBe('QUEENLESS');
      expect(b.currentQueenId).toBe(queen.id);
      expect(b.status).toBe('ACTIVE');
      const openHistory = await prisma.queenColonyHistory.findMany({
        where: { queenId: queen.id, endDate: null },
      });
      expect(openHistory.map((h) => h.colonyId)).toEqual([colonyB.id]);
    });

    it('refuses to assign a queen to a dissolved colony', async () => {
      const colony = await createColony('QD');
      await prisma.colony.update({
        where: { id: colony.id },
        data: { status: 'DISSOLVED' },
      });
      const queen = await prisma.queen.create({
        data: { code: `QD-${suffix}` },
      });
      await request(server())
        .post(`/api/v1/queens/${queen.id}/assign-colony`)
        .set(auth())
        .send({ colonyId: colony.id })
        .expect(409);
    });
  });

  describe('Tasks', () => {
    it('keeps the first completion when a task is completed twice', async () => {
      const created = await request(server())
        .post('/api/v1/tasks')
        .set(auth())
        .send({ title: `Doppelklick ${suffix}` })
        .expect(201);
      const id = (created.body as { id: string }).id;
      const first = await request(server())
        .post(`/api/v1/tasks/${id}/complete`)
        .set(auth())
        .expect(201);
      const second = await request(server())
        .post(`/api/v1/tasks/${id}/complete`)
        .set(auth())
        .expect(201);
      expect((second.body as { completedAt: string }).completedAt).toBe(
        (first.body as { completedAt: string }).completedAt,
      );
      // Announced once: a second TaskCompleted would send the webhook twice.
      await expect(
        prisma.domainEvent.count({
          where: { aggregateId: id, type: 'TaskCompleted' },
        }),
      ).resolves.toBe(1);
    });

    it('announces a completion once when two requests complete a task at the same time', async () => {
      const created = await request(server())
        .post('/api/v1/tasks')
        .set(auth())
        .send({ title: `Gleichzeitig erledigt ${suffix}` })
        .expect(201);
      const id = (created.body as { id: string }).id;

      const [first, second] = await Promise.all([
        request(server())
          .post(`/api/v1/tasks/${id}/complete`)
          .set(auth())
          .expect(201),
        request(server())
          .post(`/api/v1/tasks/${id}/complete`)
          .set(auth())
          .expect(201),
      ]);

      expect((second.body as { completedAt: string }).completedAt).toBe(
        (first.body as { completedAt: string }).completedAt,
      );
      await expect(
        prisma.domainEvent.count({
          where: { aggregateId: id, type: 'TaskCompleted' },
        }),
      ).resolves.toBe(1);
      await expect(
        prisma.auditLog.count({
          where: { entityType: 'Task', entityId: id, action: 'UPDATE' },
        }),
      ).resolves.toBe(1);
    });

    it('announces a completion once when an edit into DONE and "Erledigt" arrive at the same time', async () => {
      const created = await request(server())
        .post('/api/v1/tasks')
        .set(auth())
        .send({ title: `Bearbeitet und erledigt ${suffix}` })
        .expect(201);
      const id = (created.body as { id: string }).id;

      const [edited, completed] = await Promise.all([
        request(server())
          .patch(`/api/v1/tasks/${id}`)
          .set(auth())
          .send({ status: 'DONE' })
          .expect(200),
        request(server())
          .post(`/api/v1/tasks/${id}/complete`)
          .set(auth())
          .expect(201),
      ]);

      expect((edited.body as { completedAt: string }).completedAt).toBe(
        (completed.body as { completedAt: string }).completedAt,
      );
      await expect(
        prisma.domainEvent.count({
          where: { aggregateId: id, type: 'TaskCompleted' },
        }),
      ).resolves.toBe(1);
    });

    it('clears completedAt when a done task is reopened', async () => {
      const created = await request(server())
        .post('/api/v1/tasks')
        .set(auth())
        .send({ title: `Wieder offen ${suffix}` })
        .expect(201);
      const id = (created.body as { id: string }).id;
      await request(server())
        .post(`/api/v1/tasks/${id}/complete`)
        .set(auth())
        .expect(201);
      const reopened = await request(server())
        .patch(`/api/v1/tasks/${id}`)
        .set(auth())
        .send({ status: 'OPEN' })
        .expect(200);
      expect(
        (reopened.body as { completedAt: string | null }).completedAt,
      ).toBeNull();
    });

    it('gives a task generated from a recurring template its due date', async () => {
      const dueDate = new Date('2026-01-15T00:00:00.000Z');
      const template = await prisma.taskTemplate.create({
        data: {
          title: `Wiederkehrend ${suffix}`,
          recurrenceType: 'INTERVAL_DAYS',
          intervalDays: 7,
          nextDueDate: dueDate,
        },
      });
      await request(server()).get('/api/v1/tasks').set(auth()).expect(200);
      const generated = await prisma.task.findMany({
        where: { sourceTemplateId: template.id },
      });
      // Months of missed weekly occurrences collapse into one reminder
      // instead of a pile of stale duplicates.
      expect(generated).toHaveLength(1);
      expect(generated[0].dueDate).not.toBeNull();
      const refreshed = await prisma.taskTemplate.findUniqueOrThrow({
        where: { id: template.id },
      });
      expect(refreshed.nextDueDate.getTime()).toBeGreaterThan(Date.now());
      // One TaskCreated carrying that due date, so the calendar entry and
      // the webhook follow the generated task like any other.
      const events = await prisma.domainEvent.findMany({
        where: { aggregateType: 'Task', aggregateId: generated[0].id },
      });
      expect(events).toEqual([
        expect.objectContaining({
          type: 'TaskCreated',
          actorUserId: null,
          payload: expect.objectContaining({
            dueDate: generated[0].dueDate?.toISOString().slice(0, 10),
          }) as unknown,
        }),
      ]);
    });
  });

  describe('Input plausibility', () => {
    it('rejects an inspection rating outside the 1–5 scale', async () => {
      const colony = await createColony('SCALE');
      await request(server())
        .post('/api/v1/inspections')
        .set(auth())
        .send({
          colonyId: colony.id,
          date: '2026-07-01T00:00:00.000Z',
          gentleness: 9,
        })
        .expect(400);
    });

    it('rejects a harvest whose net weight exceeds its gross weight', async () => {
      const colony = await createColony('HW');
      await request(server())
        .post('/api/v1/harvests')
        .set(auth())
        .send({
          apiaryId,
          colonyIds: [colony.id],
          date: '2026-07-01T00:00:00.000Z',
          grossWeight: 20,
          netWeight: 25,
        })
        .expect(400);
    });

    it('rejects a harvest listing the same colony twice', async () => {
      const colony = await createColony('HD');
      await request(server())
        .post('/api/v1/harvests')
        .set(auth())
        .send({
          apiaryId,
          colonyIds: [colony.id, colony.id],
          date: '2026-07-01T00:00:00.000Z',
        })
        .expect(400);
    });
  });
});