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 TaskTemplateBody {
  id: string;
  nextDueDate: string;
  active: boolean;
  recurrenceType: string;
  recurrenceDayOfMonth: number | null;
  intervalDays: number | null;
}

describe('TaskTemplates (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  const beekeeperEmail = `task-templates-e2e-beekeeper-${Date.now()}@example.com`;
  const password = 'SuperSecret123!';
  let beekeeperId: string;
  let beekeeperToken: string;
  let templateId: string;

  beforeAll(async () => {
    app = await createTestApp();
    prisma = app.get(PrismaService);

    const passwordHash = await bcrypt.hash(password, 12);
    const beekeeper = await prisma.user.create({
      data: {
        email: beekeeperEmail,
        passwordHash,
        name: 'Beekeeper',
        role: { connect: { key: 'BEEKEEPER' } },
      },
    });
    beekeeperId = beekeeper.id;
    beekeeperToken = (await login(app, beekeeperEmail, password)).accessToken;
  });

  afterAll(async () => {
    if (templateId) {
      const generated = await prisma.task.findMany({
        where: { sourceTemplateId: templateId },
        select: { id: true },
      });
      const generatedIds = generated.map((task) => task.id);
      // Written without a user, so not covered by the userId cleanup below.
      await prisma.auditLog.deleteMany({
        where: { entityType: 'Task', entityId: { in: generatedIds } },
      });
      await prisma.domainEvent.deleteMany({
        where: { aggregateType: 'Task', aggregateId: { in: generatedIds } },
      });
      await prisma.task.deleteMany({ where: { sourceTemplateId: templateId } });
      await prisma.taskTemplate.delete({ where: { id: templateId } });
    }
    await prisma.refreshToken.deleteMany({ where: { userId: beekeeperId } });
    await prisma.auditLog.deleteMany({ where: { userId: beekeeperId } });
    await prisma.user.deleteMany({ where: { id: beekeeperId } });
    await app.close();
  });

  it('rejects a YEARLY template missing recurrenceMonth/recurrenceDayOfMonth', () => {
    return request(app.getHttpServer())
      .post('/api/v1/task-templates')
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .send({ title: 'Jahresinventur', recurrenceType: 'YEARLY' })
      .expect(400);
  });

  it('creates an INTERVAL_DAYS template and computes nextDueDate', async () => {
    const response = await request(app.getHttpServer())
      .post('/api/v1/task-templates')
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .send({
        title: `Fütterung ${Date.now()}`,
        recurrenceType: 'INTERVAL_DAYS',
        intervalDays: 1,
      })
      .expect(201);
    const body = response.body as TaskTemplateBody;
    templateId = body.id;
    expect(body.nextDueDate).toEqual(expect.any(String));
  });

  it('generates a due Task lazily on GET /tasks and advances nextDueDate', async () => {
    const yesterday = new Date();
    yesterday.setUTCDate(yesterday.getUTCDate() - 1);
    await prisma.taskTemplate.update({
      where: { id: templateId },
      data: { nextDueDate: yesterday },
    });

    await request(app.getHttpServer())
      .get('/api/v1/tasks')
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .expect(200);

    const generated = await prisma.task.findMany({
      where: { sourceTemplateId: templateId },
    });
    expect(generated).toHaveLength(1);
    const [generatedTask] = generated;
    expect(generatedTask.createdByUserId).toBeNull();

    const template = await prisma.taskTemplate.findUniqueOrThrow({
      where: { id: templateId },
    });
    expect(template.nextDueDate.getTime()).toBeGreaterThan(yesterday.getTime());

    // Same trail as any other task: an audit entry (by no user - the
    // template made it) and TaskCreated for calendar and webhooks.
    const audit = await prisma.auditLog.findMany({
      where: { entityType: 'Task', entityId: generatedTask.id },
    });
    expect(audit).toEqual([
      expect.objectContaining({ action: 'CREATE', userId: null }),
    ]);
    const events = await prisma.domainEvent.findMany({
      where: { aggregateType: 'Task', aggregateId: generatedTask.id },
    });
    expect(events).toEqual([
      expect.objectContaining({
        type: 'TaskCreated',
        actorUserId: null,
        payload: {
          relatedType: 'GENERAL',
          relatedId: null,
          dueDate: generatedTask.dueDate?.toISOString().slice(0, 10),
        },
      }),
    ]);
  });

  it('creates nothing more for an occurrence already generated', async () => {
    await request(app.getHttpServer())
      .get('/api/v1/tasks')
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .expect(200);

    await expect(
      prisma.task.count({ where: { sourceTemplateId: templateId } }),
    ).resolves.toBe(1);
  });

  it('rejects a recurrence emptied of a field it needs', () => {
    return request(app.getHttpServer())
      .patch(`/api/v1/task-templates/${templateId}`)
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .send({ recurrenceType: 'MONTHLY', recurrenceDayOfMonth: null })
      .expect(400);
  });

  it('clears the interval when switching to a monthly recurrence', async () => {
    const response = await request(app.getHttpServer())
      .patch(`/api/v1/task-templates/${templateId}`)
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .send({
        recurrenceType: 'MONTHLY',
        recurrenceDayOfMonth: 5,
        intervalDays: null,
      })
      .expect(200);
    const body = response.body as TaskTemplateBody;
    expect(body.recurrenceType).toBe('MONTHLY');
    expect(body.recurrenceDayOfMonth).toBe(5);
    expect(body.intervalDays).toBeNull();
    const auditEntry = await prisma.auditLog.findFirst({
      where: {
        entityType: 'TaskTemplate',
        entityId: templateId,
        action: 'UPDATE',
        userId: beekeeperId,
      },
      orderBy: { timestamp: 'desc' },
    });
    expect(auditEntry?.afterData).toEqual(
      expect.objectContaining({ intervalDays: null }),
    );
  });

  it('deactivates a template', async () => {
    const response = await request(app.getHttpServer())
      .post(`/api/v1/task-templates/${templateId}/deactivate`)
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .expect(201);
    expect((response.body as TaskTemplateBody).active).toBe(false);
  });
});