import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import Fastify from 'fastify';
import { fastifyAwilixPlugin } from '@fastify/awilix';
import { serializerCompiler, validatorCompiler } from 'fastify-type-provider-zod';

vi.mock('jose', () => ({
  createRemoteJWKSet: vi.fn(() => 'mock-jwks'),
  jwtVerify: vi.fn().mockResolvedValue({
    payload: {
      sub: 'kc-1',
      email: 'test@example.com',
      preferred_username: 'testuser',
      realm_access: { roles: ['member'] },
      householdIds: ['hh1'],
    },
    protectedHeader: { alg: 'RS256' },
    key: {},
  }),
}));

const {
  mockFindByUser,
  mockFindAllByUser,
  mockDeactivateAllForUser,
  mockCreate,
} = vi.hoisted(() => ({
  mockFindByUser: vi.fn(),
  mockFindAllByUser: vi.fn(),
  mockDeactivateAllForUser: vi.fn(),
  mockCreate: vi.fn(),
}));

vi.mock('./nutrition-target.repository.js', () => ({
  NutritionTargetRepository: class {
    findByUser = mockFindByUser;
    findAllByUser = mockFindAllByUser;
    deactivateAllForUser = mockDeactivateAllForUser;
    create = mockCreate;
  },
}));

vi.mock('../users/users.repository.js', () => ({
  UsersRepository: class {
    findByKeycloakId = vi.fn().mockResolvedValue({ householdIds: ['hh1'] });
    upsertFromToken = vi.fn().mockResolvedValue({ householdIds: ['hh1'] });
  },
}));

import authPlugin from '../../plugins/auth.plugin.js';
import householdPlugin from '../../plugins/household.plugin.js';
import usersRoutes from '../users/users.routes.js';
import nutritionTargetRoutes from './nutrition-target.routes.js';

function makeTarget(overrides = {}) {
  return {
    _id: 'target-1',
    userId: 'kc-1',
    householdId: 'hh1',
    dailyCalories: 2000,
    proteinG: 150,
    carbsG: 200,
    fatG: 67,
    isActive: true,
    createdAt: new Date().toISOString(),
    updatedAt: new Date().toISOString(),
    ...overrides,
  };
}

describe('nutrition-target.routes', () => {
  let app: any;

  async function buildTestApp() {
    const instance = Fastify({ logger: false });
    instance.setValidatorCompiler(validatorCompiler);
    instance.setSerializerCompiler(serializerCompiler);
    await instance.register(fastifyAwilixPlugin, {
      disposeOnClose: true,
      disposeOnResponse: true,
      strictBooleanEnforced: true,
    });
    await instance.register(authPlugin);
    await instance.register(householdPlugin);
    await instance.register(usersRoutes);
    await instance.register(nutritionTargetRoutes);
    await instance.ready();
    return instance;
  }

  const authHeaders = { authorization: 'Bearer valid-token' };

  beforeEach(async () => {
    vi.clearAllMocks();
    app = await buildTestApp();
  });

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

  describe('GET /api/v1/households/:householdId/nutrition-targets', () => {
    it('returns the active target if found', async () => {
      mockFindByUser.mockResolvedValue(makeTarget());

      const res = await app.inject({
        method: 'GET',
        url: '/api/v1/households/hh1/nutrition-targets',
        headers: authHeaders,
      });

      expect(res.statusCode).toBe(200);
      const body = res.json();
      expect(body.dailyCalories).toBe(2000);
      expect(body.isActive).toBe(true);
    });

    it('returns a message object if no target is set', async () => {
      mockFindByUser.mockResolvedValue(null);

      const res = await app.inject({
        method: 'GET',
        url: '/api/v1/households/hh1/nutrition-targets',
        headers: authHeaders,
      });

      expect(res.statusCode).toBe(200);
      expect(res.json().message).toBe('No active targets defined');
    });
  });

  describe('GET /api/v1/households/:householdId/nutrition-targets/history', () => {
    it('returns historical targets', async () => {
      mockFindAllByUser.mockResolvedValue([makeTarget({ isActive: false }), makeTarget()]);

      const res = await app.inject({
        method: 'GET',
        url: '/api/v1/households/hh1/nutrition-targets/history',
        headers: authHeaders,
      });

      expect(res.statusCode).toBe(200);
      const body = res.json();
      expect(body).toHaveLength(2);
    });
  });

  describe('POST /api/v1/households/:householdId/nutrition-targets', () => {
    it('creates target and returns it', async () => {
      mockCreate.mockImplementation((data) => Promise.resolve({ ...data, _id: 'new-id', createdAt: new Date(), updatedAt: new Date() }));

      const res = await app.inject({
        method: 'POST',
        url: '/api/v1/households/hh1/nutrition-targets',
        headers: { ...authHeaders, 'content-type': 'application/json' },
        body: JSON.stringify({
          dailyCalories: 1800,
          proteinG: 135,
          carbsG: 180,
          fatG: 60,
        }),
      });

      expect(res.statusCode).toBe(201);
      const body = res.json();
      expect(body.dailyCalories).toBe(1800);
      expect(body.isActive).toBe(true); // auto activated
    });
  });

  describe('POST /api/v1/households/:householdId/nutrition-targets/presets', () => {
    it('returns calculated splits', async () => {
      const res = await app.inject({
        method: 'POST',
        url: '/api/v1/households/hh1/nutrition-targets/presets',
        headers: { ...authHeaders, 'content-type': 'application/json' },
        body: JSON.stringify({
          calories: 2000,
          strategy: 'loss',
        }),
      });

      expect(res.statusCode).toBe(200);
      const body = res.json();
      // Loss is 40% protein (200g), 30% carbs (150g), 30% fat (67g)
      expect(body.dailyCalories).toBe(2000);
      expect(body.proteinG).toBe(200);
    });
  });
});