/**
 * Users API Tests – List / Get / Update / Delete (password_hash stripping)
 */
import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import type { FastifyInstance } from 'fastify';
import { SqliteAdapter } from '../src/database/SqliteAdapter.js';
import { createServer } from '../src/server.js';

describe('Users API', () => {
  let app: FastifyInstance;
  let db: SqliteAdapter;
  let testUserId: string;

  beforeAll(async () => {
    db = new SqliteAdapter(':memory:');
    await db.init();
    app = await createServer({ db, port: 0 });
    await app.ready();

    // Create a test user directly via DB (bypassing AuthService)
    const user = db.createUser({
      email: 'test-admin@example.com',
      password_hash: 'fake-hash-for-testing',
      name: 'Test Admin',
      role: 'admin',
    });
    testUserId = user.id;
  });

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

  // ─── List ───────────────────────────────────────────

  describe('GET /api/users', () => {
    it('should list all users', async () => {
      const response = await app.inject({
        method: 'GET',
        url: '/api/users',
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(Array.isArray(body)).toBe(true);
      expect(body.length).toBeGreaterThanOrEqual(2); // default user + test user
    });

    it('should strip password_hash from list responses', async () => {
      const response = await app.inject({
        method: 'GET',
        url: '/api/users',
      });
      const body = JSON.parse(response.body);
      for (const user of body) {
        expect(user.password_hash).toBeUndefined();
      }
    });
  });

  // ─── Get ────────────────────────────────────────────

  describe('GET /api/users/:id', () => {
    it('should get a single user', async () => {
      const response = await app.inject({
        method: 'GET',
        url: `/api/users/${testUserId}`,
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.id).toBe(testUserId);
      expect(body.email).toBe('test-admin@example.com');
      expect(body.name).toBe('Test Admin');
      expect(body.role).toBe('admin');
    });

    it('should strip password_hash from single user response', async () => {
      const response = await app.inject({
        method: 'GET',
        url: `/api/users/${testUserId}`,
      });
      const body = JSON.parse(response.body);
      expect(body.password_hash).toBeUndefined();
    });

    it('should return 404 for non-existent user', async () => {
      const response = await app.inject({
        method: 'GET',
        url: '/api/users/non-existent-id',
      });
      expect(response.statusCode).toBe(404);
    });
  });

  // ─── Update ─────────────────────────────────────────

  describe('PATCH /api/users/:id', () => {
    it('should update user name', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/users/${testUserId}`,
        payload: { name: 'Updated Name' },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.name).toBe('Updated Name');
      expect(body.id).toBe(testUserId);
    });

    it('should update user role', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/users/${testUserId}`,
        payload: { role: 'planer' },
      });
      expect(response.statusCode).toBe(200);
      const body = JSON.parse(response.body);
      expect(body.role).toBe('planer');
    });

    it('should strip password_hash from update response', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/users/${testUserId}`,
        payload: { name: 'Another Name' },
      });
      const body = JSON.parse(response.body);
      expect(body.password_hash).toBeUndefined();
    });

    it('should not update password_hash via PATCH endpoint', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: `/api/users/${testUserId}`,
        payload: { password_hash: 'hacked-hash' },
      });
      expect(response.statusCode).toBe(200);
      // Verify the password_hash was NOT changed in DB
      const dbUser = db.getUser(testUserId);
      expect(dbUser!.password_hash).toBe('fake-hash-for-testing');
    });

    it('should return 404 for non-existent user update', async () => {
      const response = await app.inject({
        method: 'PATCH',
        url: '/api/users/non-existent-id',
        payload: { name: 'New Name' },
      });
      expect(response.statusCode).toBe(404);
    });
  });

  // ─── Delete ─────────────────────────────────────────

  describe('DELETE /api/users/:id', () => {
    it('should delete a user', async () => {
      // Create a user to delete
      const user = db.createUser({
        email: 'delete-me@example.com',
        password_hash: 'temp-hash',
        name: 'Delete Me',
        role: 'planer',
      });

      const response = await app.inject({
        method: 'DELETE',
        url: `/api/users/${user.id}`,
      });
      expect(response.statusCode).toBe(204);

      // Verify it's gone
      const getRes = await app.inject({
        method: 'GET',
        url: `/api/users/${user.id}`,
      });
      expect(getRes.statusCode).toBe(404);
    });

    it('should return 404 for non-existent user delete', async () => {
      const response = await app.inject({
        method: 'DELETE',
        url: '/api/users/non-existent-id',
      });
      expect(response.statusCode).toBe(404);
    });
  });
});