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 {
  mockRecordPrice,
  mockGetPriceHistory,
  mockCompareStores,
  mockGetAnalytics,
} = vi.hoisted(() => ({
  mockRecordPrice: vi.fn(),
  mockGetPriceHistory: vi.fn(),
  mockCompareStores: vi.fn(),
  mockGetAnalytics: vi.fn(),
}));

vi.mock('./medicine-prices.repository.js', () => ({
  MedicinePricesRepository: class {
    create = vi.fn();
    findByMedicine = vi.fn();
    compareStores = vi.fn();
    getLatestForMedicine = vi.fn();
    getAnalytics = vi.fn();
  },
}));

vi.mock('./medicine-prices.service.js', () => ({
  MedicinePricesService: class {
    recordPrice = mockRecordPrice;
    getPriceHistory = mockGetPriceHistory;
    compareStores = mockCompareStores;
    getAnalytics = mockGetAnalytics;
  },
}));

vi.mock('../medicine-products/medicine-products.repository.js', () => ({
  MedicineProductsRepository: class {
    findById = vi.fn();
  },
}));

vi.mock('../stores/stores.repository.js', () => ({
  StoresRepository: class {
    findById = vi.fn();
  },
}));

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 medicinePricesRoutes from './medicine-prices.routes.js';

function makeFakePriceRecord(overrides = {}) {
  return {
    _id: 'pr-1',
    householdId: 'hh1',
    medicineProductId: 'mp-1',
    medicineProductBrand: 'Tylenol',
    medicineId: 'med-1',
    medicineName: 'Acetaminophen',
    storeId: 'st-1',
    storeName: 'Walgreens',
    price: 10,
    currency: 'USD',
    quantity: 100,
    unit: 'tablet',
    pricePerUnit: 0.1,
    date: '2026-01-15T00:00:00.000Z',
    isInsurancePrice: false,
    createdBy: 'kc-1',
    createdAt: '2026-01-15T00:00:00.000Z',
    ...overrides,
  };
}

describe('medicine-prices.routes', () => {
  let app: Awaited<ReturnType<typeof buildTestApp>>;

  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(medicinePricesRoutes);
    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('POST /api/v1/households/:householdId/medicine-prices', () => {
    const validBody = {
      medicineProductId: 'mp-1',
      medicineId: 'med-1',
      storeId: 'st-1',
      price: 10,
      currency: 'USD',
      quantity: 100,
      unit: 'tablet',
      isInsurancePrice: false,
    };

    it('records price and returns 201', async () => {
      mockRecordPrice.mockResolvedValue(makeFakePriceRecord());

      const res = await app.inject({
        method: 'POST',
        url: '/api/v1/households/hh1/medicine-prices',
        headers: authHeaders,
        payload: validBody,
      });

      expect(res.statusCode).toBe(201);
      const body = res.json();
      expect(body._id).toBe('pr-1');
      expect(body.pricePerUnit).toBe(0.1);
    });

    it('passes householdId and userId to service', async () => {
      mockRecordPrice.mockResolvedValue(makeFakePriceRecord());

      await app.inject({
        method: 'POST',
        url: '/api/v1/households/hh1/medicine-prices',
        headers: authHeaders,
        payload: validBody,
      });

      expect(mockRecordPrice).toHaveBeenCalledWith(
        expect.objectContaining({ medicineProductId: 'mp-1' }),
        'hh1',
        'kc-1',
      );
    });

    it('includes notes in response when present', async () => {
      mockRecordPrice.mockResolvedValue(makeFakePriceRecord({ notes: 'insurance price' }));

      const res = await app.inject({
        method: 'POST',
        url: '/api/v1/households/hh1/medicine-prices',
        headers: authHeaders,
        payload: validBody,
      });

      expect(res.statusCode).toBe(201);
      expect(res.json().notes).toBe('insurance price');
    });

    it('returns 400 for missing required fields', async () => {
      const res = await app.inject({
        method: 'POST',
        url: '/api/v1/households/hh1/medicine-prices',
        headers: authHeaders,
        payload: { price: 10 },
      });

      expect(res.statusCode).toBe(400);
    });

    it('handles Date objects in response', async () => {
      mockRecordPrice.mockResolvedValue(makeFakePriceRecord({
        _id: { toString: () => 'pr-obj' },
        date: new Date('2026-01-15T00:00:00.000Z'),
        createdAt: new Date('2026-01-15T00:00:00.000Z'),
      }));

      const res = await app.inject({
        method: 'POST',
        url: '/api/v1/households/hh1/medicine-prices',
        headers: authHeaders,
        payload: validBody,
      });

      expect(res.statusCode).toBe(201);
      const body = res.json();
      expect(body._id).toBe('pr-obj');
      expect(body.date).toBe('2026-01-15T00:00:00.000Z');
    });
  });

  describe('GET /api/v1/households/:householdId/medicine-prices/history/:medicineId', () => {
    it('returns paginated price history', async () => {
      mockGetPriceHistory.mockResolvedValue({
        data: [makeFakePriceRecord()],
        pagination: { cursor: null, hasMore: false },
      });

      const res = await app.inject({
        method: 'GET',
        url: '/api/v1/households/hh1/medicine-prices/history/med-1',
        headers: authHeaders,
      });

      expect(res.statusCode).toBe(200);
      const body = res.json();
      expect(body.data).toHaveLength(1);
      expect(body.pagination.hasMore).toBe(false);
    });

    it('passes query params to service', async () => {
      mockGetPriceHistory.mockResolvedValue({ data: [], pagination: { cursor: null, hasMore: false } });

      await app.inject({
        method: 'GET',
        url: '/api/v1/households/hh1/medicine-prices/history/med-1?storeId=st-1&limit=10',
        headers: authHeaders,
      });

      expect(mockGetPriceHistory).toHaveBeenCalledWith(
        'hh1',
        'med-1',
        expect.objectContaining({ storeId: 'st-1', limit: 10 }),
      );
    });
  });

  describe('GET /api/v1/households/:householdId/medicine-prices/compare/:medicineId', () => {
    it('returns store comparison', async () => {
      mockCompareStores.mockResolvedValue([
        {
          storeId: 'st-1',
          storeName: 'Walgreens',
          latestPrice: 10,
          latestPricePerUnit: 0.1,
          currency: 'USD',
          date: new Date('2026-01-15T00:00:00.000Z'),
          isInsurancePrice: false,
        },
      ]);

      const res = await app.inject({
        method: 'GET',
        url: '/api/v1/households/hh1/medicine-prices/compare/med-1',
        headers: authHeaders,
      });

      expect(res.statusCode).toBe(200);
      const body = res.json();
      expect(body.data).toHaveLength(1);
      expect(body.data[0].storeId).toBe('st-1');
      expect(body.data[0].date).toBe('2026-01-15T00:00:00.000Z');
    });

    it('passes householdId and medicineId to service', async () => {
      mockCompareStores.mockResolvedValue([]);

      await app.inject({
        method: 'GET',
        url: '/api/v1/households/hh1/medicine-prices/compare/med-99',
        headers: authHeaders,
      });

      expect(mockCompareStores).toHaveBeenCalledWith('hh1', 'med-99');
    });
  });

  describe('GET /api/v1/households/:householdId/medicine-prices/analytics', () => {
    it('returns analytics', async () => {
      mockGetAnalytics.mockResolvedValue({
        spendingOverTime: [{ period: '2026-01', total: 50 }],
        topBySpending: [],
        spendingByStore: [],
        priceAlerts: [],
      });

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

      expect(res.statusCode).toBe(200);
      const body = res.json();
      expect(body.spendingOverTime).toHaveLength(1);
      expect(body.spendingOverTime[0].total).toBe(50);
    });

    it('passes period query param to service', async () => {
      mockGetAnalytics.mockResolvedValue({
        spendingOverTime: [],
        topBySpending: [],
        spendingByStore: [],
        priceAlerts: [],
      });

      await app.inject({
        method: 'GET',
        url: '/api/v1/households/hh1/medicine-prices/analytics?period=year',
        headers: authHeaders,
      });

      expect(mockGetAnalytics).toHaveBeenCalledWith(
        'hh1',
        expect.objectContaining({ period: 'year' }),
      );
    });
  });
});