process.env.DATABASE_PATH = ':memory:';
process.env.THEMES_DIR = './themes';
process.env.FRONTEND_DIST = './frontend/dist';

import { Test } from '@nestjs/testing';
import { INestApplication, ValidationPipe } from '@nestjs/common';
import { HttpAdapterHost } from '@nestjs/core';
import cookieParser from 'cookie-parser';
import * as express from 'express';
import request from 'supertest';
import { CookieAccessInfo } from 'cookiejar';
import { AppModule } from '../../backend/src/app.module';
import { GlobalExceptionFilter } from '../../backend/src/common/filters/global-exception.filter';
import { DatabaseInitService } from '../../backend/src/database/database-init.service';

describe('Admin route validation (Zod DTOs)', () => {
  let app: INestApplication;
  let adminToken: string;

beforeAll(async () => {
    const moduleRef = await Test.createTestingModule({ imports: [AppModule] }).compile();
    app = moduleRef.createNestApplication();
    app.use(express.json({ limit: '1mb' }));
    app.use(cookieParser());
    app.useGlobalPipes(new ValidationPipe({ whitelist: true, forbidNonWhitelisted: false, transform: true }));
    const httpAdapterHost = app.get(HttpAdapterHost);
    app.useGlobalFilters(new GlobalExceptionFilter(httpAdapterHost));
    await app.init();
    await app.get(DatabaseInitService).init();

    const server = app.getHttpServer();
    await request(server).post('/api/v1/auth/register-first-admin')
      .send({ username: 'admin', password: 'Sup3rSecret!Pass' })
      .expect(201);

    const login = await request(server).post('/api/v1/auth/login')
      .send({ username: 'admin', password: 'Sup3rSecret!Pass' })
      .expect(201);
    adminToken = login.body.accessToken;
  });

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

  async function primeCsrf(): Promise<{ agent: any; csrf: string }> {
    const server = app.getHttpServer();
    const agent = request.agent(server);
    await agent.get('/api/v1/auth/csrf');
    const cookies: any = agent.jar.getCookies(CookieAccessInfo.All);
    return { agent, csrf: cookies.find((c: any) => c.name === 'csrf').value };
  }

  describe('POST /api/v1/admin/users', () => {
    it('rejects missing username with 400', async () => {
      const { agent, csrf } = await primeCsrf();
      const res = await agent.post('/api/v1/admin/users')
        .set('Authorization', `Bearer ${adminToken}`)
        .set('X-CSRF-Token', csrf)
        .send({ password: 'Sup3rSecret!Pass', role: 'player' });
      expect(res.status).toBe(400);
    });

    it('rejects username with invalid characters with 400', async () => {
      const { agent, csrf } = await primeCsrf();
      const res = await agent.post('/api/v1/admin/users')
        .set('Authorization', `Bearer ${adminToken}`)
        .set('X-CSRF-Token', csrf)
        .send({ username: 'bad name!', password: 'Sup3rSecret!Pass', role: 'player' });
      expect(res.status).toBe(400);
    });

    it('rejects weak password with 400', async () => {
      const { agent, csrf } = await primeCsrf();
      const res = await agent.post('/api/v1/admin/users')
        .set('Authorization', `Bearer ${adminToken}`)
        .set('X-CSRF-Token', csrf)
        .send({ username: 'goodname', password: 'short', role: 'player' });
      expect(res.status).toBe(400);
    });

    it('rejects invalid role with 400', async () => {
      const { agent, csrf } = await primeCsrf();
      const res = await agent.post('/api/v1/admin/users')
        .set('Authorization', `Bearer ${adminToken}`)
        .set('X-CSRF-Token', csrf)
        .send({ username: 'goodname', password: 'Sup3rSecret!Pass', role: 'god' });
      expect(res.status).toBe(400);
    });

    it('accepts a well-formed body', async () => {
      const { agent, csrf } = await primeCsrf();
      const res = await agent
        .post('/api/v1/admin/users')
        .set('Authorization', `Bearer ${adminToken}`)
        .set('X-CSRF-Token', csrf)
        .set('Content-Type', 'application/json')
        .send({ username: 'gooduser', password: 'Sup3rSecret!Pass', role: 'player' });
      expect(res.status).toBe(201);
    });
  });

  describe('PATCH /api/v1/admin/users/:id', () => {
    it('rejects a non-UUID id with 400', async () => {
      const { agent, csrf } = await primeCsrf();
      const res = await agent.patch('/api/v1/admin/users/not-a-uuid')
        .set('Authorization', `Bearer ${adminToken}`)
        .set('X-CSRF-Token', csrf)
        .send({ role: 'player' });
      expect(res.status).toBe(400);
    });

    it('rejects an invalid role with 400', async () => {
      const { agent, csrf } = await primeCsrf();
      const res = await agent.patch('/api/v1/admin/users/00000000-0000-0000-0000-000000000000')
        .set('Authorization', `Bearer ${adminToken}`)
        .set('X-CSRF-Token', csrf)
        .send({ role: 'superuser' });
      expect(res.status).toBe(400);
    });
  });

  describe('DELETE /api/v1/admin/users/:id', () => {
    it('rejects a non-UUID id with 400', async () => {
      const { agent, csrf } = await primeCsrf();
      const res = await agent.delete('/api/v1/admin/users/not-a-uuid')
        .set('Authorization', `Bearer ${adminToken}`)
        .set('X-CSRF-Token', csrf);
      expect(res.status).toBe(400);
    });
  });

  describe('GET /api/v1/admin/users?limit=...', () => {
    it('rejects limit > 200 with 400', async () => {
      const res = await request(app.getHttpServer())
        .get('/api/v1/admin/users?limit=999')
        .set('Authorization', `Bearer ${adminToken}`);
      expect(res.status).toBe(400);
    });

    it('rejects limit=0 with 400', async () => {
      const res = await request(app.getHttpServer())
        .get('/api/v1/admin/users?limit=0')
        .set('Authorization', `Bearer ${adminToken}`);
      expect(res.status).toBe(400);
    });

    it('rejects non-numeric limit with 400', async () => {
      const res = await request(app.getHttpServer())
        .get('/api/v1/admin/users?limit=abc')
        .set('Authorization', `Bearer ${adminToken}`);
      expect(res.status).toBe(400);
    });

    it('accepts a valid limit and returns 200', async () => {
      const res = await request(app.getHttpServer())
        .get('/api/v1/admin/users?limit=10')
        .set('Authorization', `Bearer ${adminToken}`);
      expect(res.status).toBe(200);
      expect(Array.isArray(res.body)).toBe(true);
    });
  });
});