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 { CsrfMiddleware } from '../../backend/src/common/middleware/csrf.middleware';
import { ConfigService } from '@nestjs/config';
import { initDb } from './db-helper';

describe('POST /api/v1/auth/change-password', () => {
  let app: INestApplication;

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

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

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

  async function buildLoggedInAgent(): Promise<any> {
    const server = app.getHttpServer();
    const agent = request.agent(server);
    await agent.get('/api/v1/auth/csrf');
    const cookies: any = agent.jar.getCookies(CookieAccessInfo.All);
    const csrf = cookies.find((c: any) => c.name === 'csrf');
    const res = await agent
      .post('/api/v1/auth/login')
      .set('X-CSRF-Token', csrf.value)
      .send({ username: 'admin', password: 'Sup3rSecret!Pass' })
      .expect(201);
    (agent as any).accessToken = res.body.accessToken as string;
    return agent;
  }

  it('rejects unauthenticated requests (CSRF or auth guard)', async () => {
    const res = await request(app.getHttpServer())
      .post('/api/v1/auth/change-password')
      .send({ oldPassword: 'x', newPassword: 'Abcdefg1!Xyz', confirmNewPassword: 'Abcdefg1!Xyz' });
    expect([401, 403]).toContain(res.status);
  });

  it('rejects when new and confirm do not match (VALIDATION_FAILED or PASSWORDS_DO_NOT_MATCH)', async () => {
    const agent = await buildLoggedInAgent();
    const csrf = (agent.jar.getCookies(CookieAccessInfo.All) as any).find((c: any) => c.name === 'csrf');
    const res = await agent
      .post('/api/v1/auth/change-password')
      .set('Authorization', `Bearer ${agent.accessToken}`)
      .set('X-CSRF-Token', csrf.value)
      .send({ oldPassword: 'Sup3rSecret!Pass', newPassword: 'NewSecret!Pass1', confirmNewPassword: 'Different1!Pass' });
    expect(res.status).toBe(400);
    expect(['PASSWORDS_DO_NOT_MATCH', 'VALIDATION_FAILED']).toContain(res.body.code);
  });

  it('rejects when old password is wrong (INVALID_OLD_PASSWORD)', async () => {
    const agent = await buildLoggedInAgent();
    const csrf = (agent.jar.getCookies(CookieAccessInfo.All) as any).find((c: any) => c.name === 'csrf');
    await agent
      .post('/api/v1/auth/change-password')
      .set('Authorization', `Bearer ${agent.accessToken}`)
      .set('X-CSRF-Token', csrf.value)
      .send({ oldPassword: 'WrongOld!Pass1', newPassword: 'NewSecret!Pass1', confirmNewPassword: 'NewSecret!Pass1' })
      .expect(401)
      .expect((r) => {
        expect(r.body.code).toBe('INVALID_OLD_PASSWORD');
      });
  });

  it('rejects when new password is too weak (PASSWORD_POLICY)', async () => {
    const agent = await buildLoggedInAgent();
    const csrf = (agent.jar.getCookies(CookieAccessInfo.All) as any).find((c: any) => c.name === 'csrf');
    await agent
      .post('/api/v1/auth/change-password')
      .set('Authorization', `Bearer ${agent.accessToken}`)
      .set('X-CSRF-Token', csrf.value)
      .send({ oldPassword: 'Sup3rSecret!Pass', newPassword: 'short', confirmNewPassword: 'short' })
      .expect(400)
      .expect((r) => {
        expect(r.body.code).toBe('PASSWORD_POLICY');
      });
  });
});