// Integration: parlay / lines / books routes (Session 28).

const express = require('express');
const request = require('supertest');

// Redis-backed services are mocked at the redis layer.
const mockStore = {};
const mockScan = jest.fn(async () => ['0', []]);
jest.mock('../../src/utils/redis', () => ({
  cacheGet: jest.fn(async (k) => (k in mockStore ? mockStore[k] : null)),
  getRedisClient: () => ({ scan: mockScan, lrange: async () => [], rpush: async () => 1, ltrim: async () => 'OK', expire: async () => 1 }),
  isDegraded: () => false,
}));

function mount(routePath, file) {
  delete require.cache[require.resolve(file)];
  const app = express();
  app.use(express.json());
  app.use(routePath, require(file));
  return app;
}

beforeEach(() => {
  for (const k of Object.keys(mockStore)) delete mockStore[k];
  jest.clearAllMocks();
});

describe('POST /api/parlay/calculate', () => {
  const app = () => mount('/api/parlay', '../../src/routes/parlay');

  test('returns combined odds + grade for valid legs', async () => {
    const res = await request(app()).post('/api/parlay/calculate').send({
      legs: [
        { player: 'A', stat: 'points', odds: 100, grade: 'A', gameId: 'g1' },
        { player: 'B', stat: 'hits', odds: 100, grade: 'A', gameId: 'g2' },
      ],
    });
    expect(res.status).toBe(200);
    expect(res.body.combinedOdds).toBe(300); // 2×2 = 4.0 → +300
    expect(res.body.combinedGrade).toBeDefined();
  });

  test('empty legs → 400', async () => {
    const res = await request(app()).post('/api/parlay/calculate').send({ legs: [] });
    expect(res.status).toBe(400);
  });

  test('suggestions endpoint returns combos', async () => {
    const props = [
      { player: 'A', stat: 'points', odds: -110, grade: 'A', gameId: 'g1' },
      { player: 'B', stat: 'hits', odds: -110, grade: 'A', gameId: 'g2' },
      { player: 'C', stat: 'goals', odds: -110, grade: 'B', gameId: 'g3' },
    ];
    const res = await request(app()).post('/api/parlay/suggestions').send({ props, legs: 3, max: 1 });
    expect(res.status).toBe(200);
    expect(res.body.suggestions).toHaveLength(1);
  });
});

describe('GET /api/lines/:sport/movers', () => {
  const app = () => mount('/api/lines', '../../src/routes/lineMovement');

  test('empty when no snapshots cached', async () => {
    const res = await request(app()).get('/api/lines/mlb/movers');
    expect(res.status).toBe(200);
    expect(res.body.movers).toEqual([]);
  });

  test('unsupported sport → 404', async () => {
    const res = await request(app()).get('/api/lines/cricket/movers');
    expect(res.status).toBe(404);
  });
});

describe('GET /api/books/:sport', () => {
  const app = () => mount('/api/books', '../../src/routes/bookComparison');

  test('returns best lines from cached props', async () => {
    mockStore[`odds:nba:${new Date().toISOString().split('T')[0]}`] = {
      props: [
        {
          player: 'Wemby', stat_type: 'points',
          lines: [
            { book: 'dk', over_odds: -110 },
            { book: 'fd', over_odds: -105 },
          ],
        },
      ],
    };
    const res = await request(app()).get('/api/books/nba');
    expect(res.status).toBe(200);
    expect(res.body.bestLines).toHaveLength(1);
    expect(res.body.bestLines[0].bestBook).toBe('fd');
  });

  test('empty when no cached props', async () => {
    const res = await request(app()).get('/api/books/nba');
    expect(res.status).toBe(200);
    expect(res.body.bestLines).toEqual([]);
  });

  test('unsupported sport → 404', async () => {
    const res = await request(app()).get('/api/books/cricket');
    expect(res.status).toBe(404);
  });
});