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 ImportRowBody {
  row: number;
  status: 'created' | 'skipped' | 'error';
  message?: string;
  id?: string;
}

interface ImportReportBody {
  entity: string;
  totalRows: number;
  created: number;
  skipped: number;
  errors: number;
  rows: ImportRowBody[];
}

function csvFile(content: string) {
  return Buffer.from(content, 'utf-8');
}

describe('Import (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  const adminEmail = `import-e2e-admin-${Date.now()}@example.com`;
  const staffEmail = `import-e2e-staff-${Date.now()}@example.com`;
  const password = 'SuperSecret123!';
  let adminId: string;
  let staffId: string;
  let adminToken: string;
  let staffToken: string;
  let apiaryId: string;
  const apiaryName = `Import-Stand-${Date.now()}`;

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

    const passwordHash = await bcrypt.hash(password, 12);
    const admin = await prisma.user.create({
      data: {
        email: adminEmail,
        passwordHash,
        name: 'Import E2E Admin',
        legacyRole: 'ADMIN',
        role: { connect: { key: 'ADMIN' } },
      },
    });
    adminId = admin.id;
    const staff = await prisma.user.create({
      data: {
        email: staffEmail,
        passwordHash,
        name: 'Import E2E Staff',
        legacyRole: 'STAFF',
        role: { connect: { key: 'STAFF' } },
      },
    });
    staffId = staff.id;
    adminToken = (await login(app, adminEmail, password)).accessToken;
    staffToken = (await login(app, staffEmail, password)).accessToken;

    const apiary = await prisma.apiary.create({ data: { name: apiaryName } });
    apiaryId = apiary.id;
  });

  afterAll(async () => {
    await prisma.colony.deleteMany({ where: { apiaryId } });
    await prisma.apiary.deleteMany({ where: { id: apiaryId } });
    await prisma.apiary.deleteMany({
      where: { name: { startsWith: 'CSV-Bienenstand-' } },
    });
    await prisma.queen.deleteMany({
      where: { code: { startsWith: 'CSV-Q-' } },
    });
    await prisma.refreshToken.deleteMany({
      where: { userId: { in: [adminId, staffId] } },
    });
    await prisma.auditLog.deleteMany({
      where: { userId: { in: [adminId, staffId] } },
    });
    await prisma.user.deleteMany({ where: { id: { in: [adminId, staffId] } } });
    await app.close();
  });

  it('rejects a non-admin', () => {
    return request(app.getHttpServer())
      .post('/api/v1/import/apiaries')
      .set('Authorization', `Bearer ${staffToken}`)
      .attach('file', csvFile('name\nTest'), {
        filename: 'apiaries.csv',
        contentType: 'text/csv',
      })
      .expect(403);
  });

  it('rejects a file without a .csv extension', () => {
    return request(app.getHttpServer())
      .post('/api/v1/import/apiaries')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', csvFile('name\nTest'), {
        filename: 'apiaries.txt',
        contentType: 'text/plain',
      })
      .expect(400);
  });

  it('imports apiaries, reporting one created and one validation error', async () => {
    const csv = `name,location\nCSV-Bienenstand-${Date.now()},Garten\n,Ohne Namen`;
    const response = await request(app.getHttpServer())
      .post('/api/v1/import/apiaries')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', csvFile(csv), {
        filename: 'apiaries.csv',
        contentType: 'text/csv',
      })
      .expect(201);
    const report = response.body as ImportReportBody;
    expect(report.entity).toBe('apiaries');
    expect(report.totalRows).toBe(2);
    expect(report.created).toBe(1);
    expect(report.errors).toBe(1);
    expect(report.rows[1].status).toBe('error');
  });

  it('imports colonies, resolving the apiary by name and skipping duplicate codes on re-import', async () => {
    const code = `CSV-V-${Date.now()}`;
    const csv = `code,apiaryName,colonyType\n${code},${apiaryName},PRODUCTION_COLONY`;

    const firstResponse = await request(app.getHttpServer())
      .post('/api/v1/import/colonies')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', csvFile(csv), {
        filename: 'colonies.csv',
        contentType: 'text/csv',
      })
      .expect(201);
    const firstReport = firstResponse.body as ImportReportBody;
    expect(firstReport.created).toBe(1);

    const secondResponse = await request(app.getHttpServer())
      .post('/api/v1/import/colonies')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', csvFile(csv), {
        filename: 'colonies.csv',
        contentType: 'text/csv',
      })
      .expect(201);
    const secondReport = secondResponse.body as ImportReportBody;
    expect(secondReport.created).toBe(0);
    expect(secondReport.skipped).toBe(1);
  });

  it('reports an error when the referenced apiary is unknown', async () => {
    const csv = `code,apiaryName,colonyType\nCSV-V-Unknown,Nicht Vorhanden,PRODUCTION_COLONY`;
    const response = await request(app.getHttpServer())
      .post('/api/v1/import/colonies')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', csvFile(csv), {
        filename: 'colonies.csv',
        contentType: 'text/csv',
      })
      .expect(201);
    const report = response.body as ImportReportBody;
    expect(report.errors).toBe(1);
    expect(report.rows[0].message).toContain('nicht gefunden');
  });

  it('imports queens', async () => {
    const code = `CSV-Q-${Date.now()}`;
    const csv = `code,breed\n${code},Carnica`;
    const response = await request(app.getHttpServer())
      .post('/api/v1/import/queens')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', csvFile(csv), {
        filename: 'queens.csv',
        contentType: 'text/csv',
      })
      .expect(201);
    const report = response.body as ImportReportBody;
    expect(report.created).toBe(1);
  });
});