import { INestApplication, ValidationPipe } from '@nestjs/common';
import { Test } from '@nestjs/testing';
import Database from 'better-sqlite3';
import { mkdtempSync } from 'fs';
import { tmpdir } from 'os';
import { join } from 'path';
import request from 'supertest';
import { AppModule } from '../src/app.module';
import { seedDatabase } from '../src/testing/seed';

/** API 端到端测试 — 对应 T-1.3 / T-1.4 E2E。*/
describe('API (e2e)', () => {
  let app: INestApplication;

  beforeAll(async () => {
    const dir = mkdtempSync(join(tmpdir(), 'train-e2e-'));
    const dbPath = join(dir, 'test.db');
    const seedDb = new Database(dbPath);
    seedDatabase(seedDb);
    seedDb.close();
    process.env.DB_PATH = dbPath;
    process.env.APP_DB_PATH = join(dir, 'app.db'); // 可写库（用户等）
    process.env.ADMIN_EMAIL = 'admin@example.com'; // 引导管理员（审核测试）
    process.env.UPLOAD_DIR = join(dir, 'uploads'); // 图片上传目录（隔离）

    const moduleRef = await Test.createTestingModule({
      imports: [AppModule],
    }).compile();
    app = moduleRef.createNestApplication();
    app.useGlobalPipes(new ValidationPipe({ transform: true, whitelist: true }));
    await app.init();
  });

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

  it('GET /api/health', async () => {
    const res = await request(app.getHttpServer()).get('/api/health').expect(200);
    expect(res.body.status).toBe('ok');
    expect(res.body.models).toBe(2);
    expect(res.body.units).toBe(1);
  });

  it('GET /api/categories', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/categories')
      .expect(200);
    expect(Array.isArray(res.body)).toBe(true);
    expect(res.body.length).toBe(3);
  });

  it('GET /api/models 列表+分页', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/models?pageSize=1')
      .expect(200);
    expect(res.body.total).toBe(2);
    expect(res.body.items.length).toBe(1);
  });

  it('GET /api/models 筛选+排序', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/models?sort=max_speed_value&order=desc')
      .expect(200);
    expect(res.body.items[0].model_code).toBe('CR400AF');
  });

  it('GET /api/models 非法参数被拒', async () => {
    await request(app.getHttpServer())
      .get('/api/models?pageSize=99999')
      .expect(400);
  });

  it('GET /api/models/:id 详情', async () => {
    const list = await request(app.getHttpServer()).get('/api/models?q=HXD');
    const id = list.body.items[0].id;
    const res = await request(app.getHttpServer())
      .get(`/api/models/${id}`)
      .expect(200);
    expect(res.body.model_code).toBe('HXD1型');
  });

  it('GET /api/models/:id 不存在 404', async () => {
    await request(app.getHttpServer()).get('/api/models/99999').expect(404);
  });

  it('GET /api/search', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/search?q=CR400')
      .expect(200);
    expect(res.body.results[0].model_code).toBe('CR400AF');
  });

  it('GET /api/units 列表', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/units')
      .expect(200);
    expect(res.body.total).toBe(1);
    expect(res.body.items[0].car_number).toBe('SYJZ-0001');
  });

  // ===== T-2.1 账户体系 =====
  const cred = { email: 'tester@example.com', password: 'secret123', displayName: '测试员' };
  let token = '';

  it('POST /api/auth/register 注册', async () => {
    const res = await request(app.getHttpServer())
      .post('/api/auth/register')
      .send(cred)
      .expect(201);
    expect(res.body.token).toBeTruthy();
    expect(res.body.user.email).toBe('tester@example.com');
    expect(res.body.user.role).toBe('user');
    token = res.body.token;
  });

  it('POST /api/auth/register 重复邮箱 409', async () => {
    await request(app.getHttpServer())
      .post('/api/auth/register')
      .send(cred)
      .expect(409);
  });

  it('POST /api/auth/register 非法输入 400', async () => {
    await request(app.getHttpServer())
      .post('/api/auth/register')
      .send({ email: 'bad', password: '1', displayName: '' })
      .expect(400);
  });

  it('POST /api/auth/login 正确/错误', async () => {
    await request(app.getHttpServer())
      .post('/api/auth/login')
      .send({ email: cred.email, password: cred.password })
      .expect(201);
    await request(app.getHttpServer())
      .post('/api/auth/login')
      .send({ email: cred.email, password: 'wrongpass' })
      .expect(401);
  });

  it('GET /api/auth/me 需要 token', async () => {
    await request(app.getHttpServer()).get('/api/auth/me').expect(401);
    const res = await request(app.getHttpServer())
      .get('/api/auth/me')
      .set('Authorization', `Bearer ${token}`)
      .expect(200);
    expect(res.body.email).toBe('tester@example.com');
  });

  // ===== T-2.2 / T-2.3 编辑·修订（图鉴仅管理员可编辑）=====
  let adminToken = '';

  it('普通用户提交编辑被拒 403（仅管理员可编辑图鉴）', async () => {
    await request(app.getHttpServer())
      .post('/api/models/1/revisions')
      .set('Authorization', `Bearer ${token}`)
      .send({ changes: { usage: '干线货运（实测）' } })
      .expect(403);
  });

  it('未登录提交编辑 401', async () => {
    await request(app.getHttpServer())
      .post('/api/models/1/revisions')
      .send({ changes: { usage: 'x' } })
      .expect(401);
  });

  it('管理员编辑 → 自动通过 + 覆盖生效 + 计分', async () => {
    const reg = await request(app.getHttpServer())
      .post('/api/auth/register')
      .send({ email: 'admin@example.com', password: 'secret123', displayName: '管理员' })
      .expect(201);
    adminToken = reg.body.token;
    expect(reg.body.user.role).toBe('admin');

    const res = await request(app.getHttpServer())
      .post('/api/models/1/revisions')
      .set('Authorization', `Bearer ${adminToken}`)
      .send({ changes: { usage: '干线货运（实测）' }, note: '管理员维护' })
      .expect(201);
    expect(res.body.status).toBe('approved');

    const detail = await request(app.getHttpServer()).get('/api/models/1').expect(200);
    expect(detail.body.usage).toBe('干线货运（实测）');
    expect(detail.body.overridden).toContain('usage');
  });

  it('修订历史可见', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/models/1/revisions')
      .expect(200);
    expect(res.body.length).toBeGreaterThanOrEqual(1);
  });

  it('普通用户访问审核队列 403', async () => {
    await request(app.getHttpServer())
      .get('/api/revisions/pending')
      .set('Authorization', `Bearer ${token}`)
      .expect(403);
  });

  it('管理员编辑模型2立即生效', async () => {
    const res = await request(app.getHttpServer())
      .post('/api/models/2/revisions')
      .set('Authorization', `Bearer ${adminToken}`)
      .send({ changes: { status: '封存' } })
      .expect(201);
    expect(res.body.status).toBe('approved');
    const detail = await request(app.getHttpServer()).get('/api/models/2').expect(200);
    expect(detail.body.status).toBe('封存');
  });

  it('字段白名单外/非法值被拒 400', async () => {
    await request(app.getHttpServer())
      .post('/api/models/1/revisions')
      .set('Authorization', `Bearer ${adminToken}`)
      .send({ changes: { password_hash: 'hack' } })
      .expect(400);
    await request(app.getHttpServer())
      .post('/api/models/1/revisions')
      .set('Authorization', `Bearer ${adminToken}`)
      .send({ changes: { first_year: '99' } })
      .expect(400);
  });

  // ===== T-2.4 荣誉与激励 =====
  it('GET /api/auth/me 含等级与徽章', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/auth/me')
      .set('Authorization', `Bearer ${adminToken}`)
      .expect(200);
    expect(res.body.level).toBeDefined();
    expect(res.body.level.title).toBeTruthy();
    expect(Array.isArray(res.body.badges)).toBe(true);
    expect(res.body.approvedCount).toBeGreaterThanOrEqual(1); // 管理员有被采纳修订
  });

  it('GET /api/leaderboard 含贡献者与头衔', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/leaderboard')
      .expect(200);
    expect(Array.isArray(res.body)).toBe(true);
    expect(res.body[0].rank).toBe(1);
    expect(res.body[0].title).toBeTruthy();
  });

  it('认领词条维护 → 出现在维护者列表', async () => {
    await request(app.getHttpServer())
      .post('/api/models/1/maintainers')
      .set('Authorization', `Bearer ${token}`)
      .expect(201);
    const res = await request(app.getHttpServer())
      .get('/api/models/1/maintainers')
      .expect(200);
    expect(res.body.some((mm: any) => mm.displayName === '测试员')).toBe(true);
  });

  it('未登录认领维护 401', async () => {
    await request(app.getHttpServer())
      .post('/api/models/1/maintainers')
      .expect(401);
  });

  // ===== T-3.1/3.2 论坛 + 词条讨论 =====
  let threadId = 0;

  it('创建帖子并回复', async () => {
    const t = await request(app.getHttpServer())
      .post('/api/threads')
      .set('Authorization', `Bearer ${token}`)
      .send({ board: 'general', title: '大家好啊', body: '第一帖' })
      .expect(201);
    expect(t.body.title).toBe('大家好啊');
    threadId = t.body.id;

    const r = await request(app.getHttpServer())
      .post(`/api/threads/${threadId}/replies`)
      .set('Authorization', `Bearer ${token}`)
      .send({ body: '沙发' })
      .expect(201);
    expect(r.body.reply_count).toBe(1);
    expect(r.body.replies[0].body).toBe('沙发');
  });

  it('帖子列表按板块', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/threads?board=general')
      .expect(200);
    expect(res.body.some((t: any) => t.id === threadId)).toBe(true);
  });

  it('词条讨论：绑定 model_id', async () => {
    await request(app.getHttpServer())
      .post('/api/threads')
      .set('Authorization', `Bearer ${token}`)
      .send({ board: 'entry', modelId: 1, title: 'HXD1 求资料', body: '有铭牌照吗' })
      .expect(201);
    const res = await request(app.getHttpServer())
      .get('/api/threads?modelId=1')
      .expect(200);
    expect(res.body.length).toBeGreaterThanOrEqual(1);
    expect(res.body[0].model_id).toBe(1);
  });

  it('未登录发帖 401，非法输入 400', async () => {
    await request(app.getHttpServer())
      .post('/api/threads')
      .send({ board: 'general', title: 'x', body: 'y' })
      .expect(401);
    await request(app.getHttpServer())
      .post('/api/threads')
      .set('Authorization', `Bearer ${token}`)
      .send({ board: 'general', title: 'a', body: '' })
      .expect(400);
  });

  // ===== T-3.3 打卡（sightings）=====
  it('打卡 → 出现在车型打卡列表与近期动态', async () => {
    const res = await request(app.getHttpServer())
      .post('/api/models/1/sightings')
      .set('Authorization', `Bearer ${token}`)
      .send({ lat: 39.9, lng: 116.4, station: '北京站', carNumber: 'HXD1-0001', description: '清晨拍到' })
      .expect(201);
    expect(res.body.station).toBe('北京站');
    expect(res.body.model_code).toBe('HXD1型');
    expect(res.body.user_name).toBe('测试员');

    const list = await request(app.getHttpServer())
      .get('/api/models/1/sightings')
      .expect(200);
    expect(list.body.length).toBeGreaterThanOrEqual(1);

    const recent = await request(app.getHttpServer())
      .get('/api/sightings/recent')
      .expect(200);
    expect(recent.body[0].model_code).toBe('HXD1型');

    const map = await request(app.getHttpServer()).get('/api/sightings/map').expect(200);
    expect(map.body.some((p: any) => p.station === '北京站')).toBe(true);
  });

  it('未登录打卡 401，非法坐标 400', async () => {
    await request(app.getHttpServer())
      .post('/api/models/1/sightings')
      .send({ lat: 39.9, lng: 116.4 })
      .expect(401);
    await request(app.getHttpServer())
      .post('/api/models/1/sightings')
      .set('Authorization', `Bearer ${token}`)
      .send({ lat: 999, lng: 116.4 })
      .expect(400);
  });

  // ===== T-4.2 族谱 / T-4.3 拍车攻略 =====
  it('GET /api/models/families 按系列聚合', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/models/families')
      .expect(200);
    expect(Array.isArray(res.body)).toBe(true);
    expect(res.body[0].series).toBeDefined();
  });

  it('GET /api/sightings/spots 拍车攻略聚合', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/sightings/spots')
      .expect(200);
    expect(Array.isArray(res.body)).toBe(true);
    // 前面打卡过北京站
    expect(res.body.some((s: any) => s.station === '北京站')).toBe(true);
    expect(res.body[0].models[0].model_code).toBeTruthy();
  });

  // ===== T-5.2 数据大屏 / 开放 API =====
  it('GET /api/stats 概览统计', async () => {
    const res = await request(app.getHttpServer()).get('/api/stats').expect(200);
    expect(res.body.totals.models).toBe(2);
    expect(res.body.byCategory.length).toBeGreaterThan(0);
    expect(Array.isArray(res.body.speedByDecade)).toBe(true);
  });

  it('GET /api/export/models.json 开放数据', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/export/models.json')
      .expect(200);
    expect(res.body.length).toBe(2);
    expect(res.body[0].model_code).toBeTruthy();
  });

  it('GET /api/export/models.csv 导出 CSV', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/export/models.csv')
      .expect(200);
    expect(res.headers['content-type']).toContain('text/csv');
    expect(res.text.split('\n')[0]).toContain('model_code');
  });

  // ===== 共享图库（管理员上传，所有人可看）=====
  const png = Buffer.from(
    'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==',
    'base64',
  );
  let photoId = 0;

  it('普通用户上传照片 403', async () => {
    await request(app.getHttpServer())
      .post('/api/models/1/photos')
      .set('Authorization', `Bearer ${token}`)
      .attach('file', png, 'demo.png')
      .expect(403);
  });

  it('管理员上传照片 → 进入公共图库', async () => {
    const res = await request(app.getHttpServer())
      .post('/api/models/1/photos')
      .set('Authorization', `Bearer ${adminToken}`)
      .field('caption', '管理员示例照片')
      .attach('file', png, 'demo.png')
      .expect(201);
    expect(res.body.url).toMatch(/^\/uploads\/.+\.png$/);
    expect(res.body.caption).toBe('管理员示例照片');
    photoId = res.body.id;

    const list = await request(app.getHttpServer())
      .get('/api/models/1/photos')
      .expect(200);
    expect(list.body.some((p: any) => p.id === photoId)).toBe(true);
    expect(list.body[0].uploaderName).toBe('管理员');
  });

  it('非图片被拒 400', async () => {
    await request(app.getHttpServer())
      .post('/api/models/1/photos')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', Buffer.from('hello'), 'note.txt')
      .expect(400);
  });

  it('管理员删除照片', async () => {
    await request(app.getHttpServer())
      .delete(`/api/photos/${photoId}`)
      .set('Authorization', `Bearer ${adminToken}`)
      .expect(200);
    const list = await request(app.getHttpServer()).get('/api/models/1/photos').expect(200);
    expect(list.body.some((p: any) => p.id === photoId)).toBe(false);
  });

  it('候选照片确认流程', async () => {
    const up = await request(app.getHttpServer())
      .post('/api/models/3/photos')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', png, 'demo.png')
      .expect(201);
    const pid = up.body.id;
    expect(up.body.status).toBe('confirmed');

    // 直接置为候选（模拟取图脚本入库的 candidate）
    const db = new Database(process.env.APP_DB_PATH as string);
    db.prepare("UPDATE photos SET status='candidate' WHERE id=?").run(pid);
    db.close();

    let list = await request(app.getHttpServer()).get('/api/models/3/photos').expect(200);
    expect(list.body.find((p: any) => p.id === pid).status).toBe('candidate');

    await request(app.getHttpServer())
      .post(`/api/photos/${pid}/confirm`)
      .set('Authorization', `Bearer ${adminToken}`)
      .expect(201);

    list = await request(app.getHttpServer()).get('/api/models/3/photos').expect(200);
    expect(list.body.find((p: any) => p.id === pid).status).toBe('confirmed');
  });

  // ===== 封面优先（featured）=====
  it('设为封面：cover_url 优先 featured，其次最小 id；权限受控', async () => {
    // 上传两张确认照片到模型 2
    const a = await request(app.getHttpServer())
      .post('/api/models/2/photos')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', png, 'a.png')
      .expect(201);
    const b = await request(app.getHttpServer())
      .post('/api/models/2/photos')
      .set('Authorization', `Bearer ${adminToken}`)
      .attach('file', png, 'b.png')
      .expect(201);

    // 默认封面 = 最早一张（a）
    const findCover = async () => {
      const res = await request(app.getHttpServer())
        .get('/api/models?pageSize=50')
        .expect(200);
      return res.body.items.find((m: any) => m.id === 2)?.cover_url as string | null;
    };
    const aFile = a.body.url.replace('/uploads/', '');
    const bFile = b.body.url.replace('/uploads/', '');
    expect(await findCover()).toBe(`/uploads/${aFile}`);

    // 普通用户设为封面 403
    await request(app.getHttpServer())
      .post(`/api/photos/${b.body.id}/feature`)
      .set('Authorization', `Bearer ${token}`)
      .expect(403);

    // 管理员把 b 设为封面 → cover_url 切到 b
    const feat = await request(app.getHttpServer())
      .post(`/api/photos/${b.body.id}/feature`)
      .set('Authorization', `Bearer ${adminToken}`)
      .expect(201);
    expect(feat.body.featured).toBe(true);
    expect(feat.body.status).toBe('confirmed');
    expect(await findCover()).toBe(`/uploads/${bFile}`);

    // 改 featured 到 a → 旧 featured 清除，cover 回到 a
    await request(app.getHttpServer())
      .post(`/api/photos/${a.body.id}/feature`)
      .set('Authorization', `Bearer ${adminToken}`)
      .expect(201);
    const photos = await request(app.getHttpServer()).get('/api/models/2/photos').expect(200);
    expect(photos.body.find((p: any) => p.id === a.body.id).featured).toBe(true);
    expect(photos.body.find((p: any) => p.id === b.body.id).featured).toBe(false);
    expect(await findCover()).toBe(`/uploads/${aFile}`);
  });
});