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';

interface StockBody {
  summary: {
    initial: number;
    withdrawn: number;
    consumed: number;
    remaining: number;
  };
  movements: { type: string; quantity: number; notes: string | null }[];
}

interface LotBody {
  id: string;
  remainingCount: number;
  usedIn: { quantity: number; productionBatch: { id: string } }[];
}

interface BatchBody {
  id: string;
  inputs: { quantity: number; rawMaterialLot: { id: string } }[];
}

/**
 * Raw material lots (wax, propolis) and their consumption in production:
 * creating a production batch books the inputs off the raw lots in the same
 * transaction, never more than is left; deleting a mistaken batch gives the
 * material back as its own movement.
 */
describe('Raw materials and production (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  const suffix = `${Date.now()}-${Math.round(Math.random() * 1e6)}`;
  const password = 'SuperSecret123!';
  let token: string;
  let waxId: string;
  let propolisId: string;
  let productId: string;
  let batchId: string;

  const server = () => app.getHttpServer();
  const auth = (req: request.Test) =>
    req.set('Authorization', `Bearer ${token}`);

  async function stockOf(lotId: string): Promise<StockBody> {
    const response = await auth(
      request(server()).get(`/api/v1/raw-material-lots/${lotId}/stock`),
    ).expect(200);
    return response.body as StockBody;
  }

  beforeAll(async () => {
    app = await createTestApp();
    prisma = app.get(PrismaService);
    await prisma.user.create({
      data: {
        email: `raw-beekeeper-${suffix}@example.com`,
        passwordHash: await bcrypt.hash(password, 12),
        name: 'Beekeeper',
        role: { connect: { key: 'BEEKEEPER' } },
      },
    });
    token = (await login(app, `raw-beekeeper-${suffix}@example.com`, password))
      .accessToken;

    const createLot = async (kind: string, lot: string, grams: number) => {
      const response = await auth(
        request(server()).post('/api/v1/raw-material-lots'),
      )
        .send({
          kind,
          lotNumber: `${lot}-${suffix}`,
          date: '2026-06-01',
          quantity: grams,
        })
        .expect(201);
      return (response.body as LotBody).id;
    };
    waxId = await createLot('BEESWAX', 'W', 1000);
    propolisId = await createLot('PROPOLIS', 'P', 200);

    const product = await prisma.product.create({
      data: {
        name: `Propolis-Salbe ${suffix}`,
        kind: 'MANUFACTURED',
        shopCategory: 'PROPOLIS',
      },
    });
    productId = product.id;
  });

  afterAll(async () => {
    await app.close();
  });

  it('books the raw material when a production batch is made from it', async () => {
    const response = await auth(
      request(server()).post('/api/v1/production-batches'),
    )
      .send({
        productId,
        lotNumber: `S-${suffix}`,
        date: '2026-06-10',
        quantity: 20,
        inputs: [
          { rawMaterialLotId: waxId, quantity: 300 },
          { rawMaterialLotId: propolisId, quantity: 50 },
        ],
      })
      .expect(201);
    const batch = response.body as BatchBody;
    batchId = batch.id;

    expect(batch.inputs).toHaveLength(2);
    expect((await stockOf(waxId)).summary).toMatchObject({
      consumed: 300,
      remaining: 700,
    });
    expect((await stockOf(propolisId)).summary.remaining).toBe(150);

    const wax = await auth(
      request(server()).get(`/api/v1/raw-material-lots/${waxId}`),
    ).expect(200);
    expect(
      (wax.body as LotBody).usedIn.map((u) => u.productionBatch.id),
    ).toEqual([batchId]);
  });

  it('refuses a production batch that needs more raw material than is left - and creates nothing', async () => {
    await auth(request(server()).post('/api/v1/production-batches'))
      .send({
        productId,
        lotNumber: `S2-${suffix}`,
        date: '2026-06-11',
        quantity: 10,
        inputs: [{ rawMaterialLotId: waxId, quantity: 800 }],
      })
      .expect(400);
    expect(
      await prisma.productionBatch.count({
        where: { lotNumber: `S2-${suffix}` },
      }),
    ).toBe(0);
    expect((await stockOf(waxId)).summary.remaining).toBe(700);
  });

  it('withdraws raw material like any other stock', async () => {
    const response = await auth(
      request(server()).post(`/api/v1/raw-material-lots/${waxId}/withdrawals`),
    )
      .send({ quantity: 100, reason: 'SONSTIGES', notes: 'Wachstücher' })
      .expect(201);
    expect((response.body as StockBody).summary).toMatchObject({
      withdrawn: 100,
      consumed: 300,
      remaining: 600,
    });
  });

  it('gives the raw material back when a mistaken production batch is deleted', async () => {
    await auth(
      request(server()).delete(`/api/v1/production-batches/${batchId}`),
    ).expect(200);

    const wax = await stockOf(waxId);
    expect(wax.summary).toMatchObject({ consumed: 0, remaining: 900 });
    expect(wax.movements.some((m) => m.notes?.startsWith('Rückgabe'))).toBe(
      true,
    );
    expect((await stockOf(propolisId)).summary.remaining).toBe(200);
  });

  it('keeps a raw lot with movements as history', async () => {
    await auth(
      request(server()).delete(`/api/v1/raw-material-lots/${waxId}`),
    ).expect(409);
  });
});