process.env.ENGINE2_ENABLED = 'true';

const mockAnalyze = jest.fn();
jest.mock('../../src/services/adapters/openRouterAdapter', () => ({
  configured: () => true,
  analyze: (...args) => mockAnalyze(...args),
  getUsage: () => ({ requestsToday: 0, requestsRemaining: 1000 }),
}));

const mockUpdates = [];
jest.mock('../../src/utils/supabase', () => ({
  getSupabaseServiceClient: () => ({
    from() {
      const proxy = {
        update(patch) {
          mockUpdates.push(patch);
          return {
            eq() { return Promise.resolve({ error: null }); },
          };
        },
      };
      return proxy;
    },
  }),
}));

const engine2 = require('../../src/services/intelligence/engine2');

beforeEach(() => {
  engine2.clearQueue();
  mockAnalyze.mockReset();
  mockUpdates.length = 0;
});

function sampleContext(overrides = {}) {
  return {
    player_name: 'Jalen Brunson',
    team: 'NYK',
    sport: 'nba',
    direction: 'over',
    line: 26.5,
    stat_type: 'points',
    home_team: 'NYK',
    away_team: 'BOS',
    game_date: '2026-06-08',
    engine1_grade: 'A-',
    engine1_factors: ['l5_avg', 'opp_rank_stat', 'home_away'],
    features: { l5_avg: 30.4, l20_avg: 26.1, home_away: 1.0 },
    trap: { composite: 0.18, recommendation: 'proceed', signals: {} },
    consistency: { consistency: 'reliable', cv: 0.18, score: 0.7 },
    recentGames: [
      { date: '2026-06-05', value: 32, opponent: 'BOS', home: true },
      { date: '2026-06-03', value: 28, opponent: 'MIA', home: false },
    ],
    ...overrides,
  };
}

describe('engine2 — eligibility', () => {
  test('queues A/B tier grades', () => {
    engine2.queueAnalysis('g1', sampleContext({ engine1_grade: 'A-' }));
    engine2.queueAnalysis('g2', sampleContext({ engine1_grade: 'B+' }));
    expect(engine2.getQueueSize()).toBe(2);
  });

  test('SKIPS C/D/F grades', () => {
    engine2.queueAnalysis('c1', sampleContext({ engine1_grade: 'C' }));
    engine2.queueAnalysis('d1', sampleContext({ engine1_grade: 'D' }));
    engine2.queueAnalysis('f1', sampleContext({ engine1_grade: 'F' }));
    expect(engine2.getQueueSize()).toBe(0);
  });

  test('respects ENGINE2_ENABLED=false', () => {
    process.env.ENGINE2_ENABLED = 'false';
    jest.resetModules();
    const fresh = require('../../src/services/intelligence/engine2');
    fresh.queueAnalysis('g3', sampleContext({ engine1_grade: 'A' }));
    expect(fresh.getQueueSize()).toBe(0);
    process.env.ENGINE2_ENABLED = 'true';
  });
});

describe('engine2 — prompt construction', () => {
  test('buildPrompt includes player, features, traps, and recent games', () => {
    const prompt = engine2.__internals.buildPrompt(sampleContext());
    expect(prompt).toContain('Jalen Brunson');
    expect(prompt).toContain('PROP: over 26.5 points');
    expect(prompt).toContain('l5_avg');
    expect(prompt).toContain('Trap composite: 0.18');
    expect(prompt).toContain('cv=0.18');
  });

  test('prompt never contains the literal string "VYNDR"', () => {
    const prompt = engine2.__internals.buildPrompt(sampleContext());
    expect(prompt).not.toMatch(/VYNDR/);
  });
});

describe('engine2 — response parsing', () => {
  test('parseResponse handles raw JSON', () => {
    const r = engine2.__internals.parseResponse('{"grade":"A","confidence":0.7,"narrative":"..."}');
    expect(r.grade).toBe('A');
  });

  test('parseResponse handles markdown fenced JSON', () => {
    const r = engine2.__internals.parseResponse('Here you go:\n```json\n{"grade":"B"}\n```');
    expect(r.grade).toBe('B');
  });

  test('parseResponse extracts JSON from chatty preamble', () => {
    const r = engine2.__internals.parseResponse('Sure! Here is the analysis: {"grade":"B+","confidence":0.6}');
    expect(r.grade).toBe('B+');
  });

  test('parseResponse returns null when no JSON found', () => {
    expect(engine2.__internals.parseResponse('no json here')).toBeNull();
    expect(engine2.__internals.parseResponse(null)).toBeNull();
  });
});

describe('engine2 — validation', () => {
  test('rejects unknown grade values', () => {
    expect(engine2.__internals.validateAnalysis({
      grade: 'AAA', confidence: 0.7, narrative: 'x',
    })).toBeNull();
  });

  test('rejects out-of-range confidence', () => {
    expect(engine2.__internals.validateAnalysis({
      grade: 'A', confidence: 1.5, narrative: 'x',
    })).toBeNull();
  });

  test('rejects empty narrative', () => {
    expect(engine2.__internals.validateAnalysis({
      grade: 'A', confidence: 0.7, narrative: '',
    })).toBeNull();
  });

  test('truncates narrative + concern + key_factor to caps', () => {
    const out = engine2.__internals.validateAnalysis({
      grade: 'A',
      confidence: 0.7,
      narrative: 'x'.repeat(800),
      trap_concern: 'y'.repeat(500),
      key_factor: 'z'.repeat(300),
      agrees_with_engine1: true,
    });
    expect(out.narrative.length).toBe(500);
    expect(out.trap_concern.length).toBe(300);
    expect(out.key_factor.length).toBe(200);
  });

  test('passes explicit null grade through', () => {
    const out = engine2.__internals.validateAnalysis({ grade: null, reason: 'not enough data' });
    expect(out).toEqual({ grade: null, reason: 'not enough data' });
  });
});

describe('engine2 — processQueue', () => {
  test('processes queued analysis, persists to grade_history', async () => {
    mockAnalyze.mockResolvedValue({
      response: JSON.stringify({
        grade: 'A',
        confidence: 0.78,
        agrees_with_engine1: true,
        narrative: 'Brunson trending up + weak D matchup + rested.',
        trap_concern: null,
        key_factor: 'opp_rank_stat',
      }),
      modelUsed: 'deepseek/deepseek-chat',
      latencyMs: 4200,
    });
    engine2.queueAnalysis('grade-1', sampleContext());
    const summary = await engine2.processQueue();
    expect(summary).toMatchObject({ processed: 1, succeeded: 1, failed: 0 });
    expect(mockUpdates).toHaveLength(1);
    expect(mockUpdates[0].engine2_grade).toBe('A');
    expect(mockUpdates[0].engine2_confidence).toBe(0.78);
    expect(mockUpdates[0].engine2_model).toBe('deepseek/deepseek-chat');
  });

  test('records failures without crashing', async () => {
    mockAnalyze.mockResolvedValue(null); // adapter unavailable
    engine2.queueAnalysis('grade-2', sampleContext());
    const summary = await engine2.processQueue();
    expect(summary).toMatchObject({ processed: 1, succeeded: 0, failed: 1 });
  });

  test('respects BATCH_SIZE — leaves remaining items for next call', async () => {
    mockAnalyze.mockResolvedValue({
      response: JSON.stringify({ grade: 'A', confidence: 0.7, agrees_with_engine1: true, narrative: 'x' }),
      modelUsed: 'deepseek/deepseek-chat',
      latencyMs: 100,
    });
    // Queue more than BATCH_SIZE items.
    for (let i = 0; i < engine2.__internals.BATCH_SIZE + 3; i += 1) {
      engine2.queueAnalysis(`g-${i}`, sampleContext());
    }
    const summary = await engine2.processQueue();
    expect(summary.processed).toBe(engine2.__internals.BATCH_SIZE);
    expect(summary.remaining).toBe(3);
  });
});