/**
 * Integration tests for ScreenerController + /health
 * Uses Fastify inject() — no real Yahoo calls, no live server.
 */

import { test } from 'node:test';
import assert from 'node:assert/strict';
import Fastify from 'fastify';
import cors from '@fastify/cors';
import { ScreenerController } from '../server/controllers/screener.controller';
import type { ScreenerEngine } from '../server/services/ScreenerEngine';
import type { ScreenerResult, MarketContext } from '../server/types';

// ── Fixture data ────────────────────────────────────────────────────────────

const MARKET_CTX: MarketContext = {
  sp500Price: 5000,
  riskFreeRate: 4.5,
  vixLevel: 18,
  rateRegime: 'NORMAL',
  volatilityRegime: 'NORMAL',
  benchmarks: { marketPE: 22, techPE: 30, reitYield: 3.5, igSpread: 1.0 },
};

const EMPTY_RESULT: ScreenerResult = {
  STOCK: [],
  ETF: [],
  BOND: [],
  ERROR: [],
  marketContext: MARKET_CTX,
};

// ── Stub ────────────────────────────────────────────────────────────────────

const stubEngine = {
  screenTickers: async (_tickers: string[]) => EMPTY_RESULT,
  getMarketContext: async () => MARKET_CTX,
} as unknown as ScreenerEngine;

// ── App factory ─────────────────────────────────────────────────────────────

async function buildTestApp() {
  const app = Fastify({ logger: false });
  await app.register(cors, { origin: '*' });
  new ScreenerController(stubEngine).register(app);
  app.get('/health', async () => ({ status: 'ok' }));
  await app.ready();
  return app;
}

// ── Tests ────────────────────────────────────────────────────────────────────

test('GET /health → 200 { status: ok }', async () => {
  const app = await buildTestApp();
  const res = await app.inject({ method: 'GET', url: '/health' });
  assert.equal(res.statusCode, 200);
  assert.deepEqual(res.json(), { status: 'ok' });
});

test('POST /api/screen → 200 with STOCK/ETF/BOND/ERROR/marketContext keys', async () => {
  const app = await buildTestApp();
  const res = await app.inject({
    method: 'POST',
    url: '/api/screen',
    payload: { tickers: ['AAPL'] },
  });
  assert.equal(res.statusCode, 200);
  const body = res.json();
  assert.ok(Array.isArray(body.STOCK), 'STOCK should be array');
  assert.ok(Array.isArray(body.ETF), 'ETF should be array');
  assert.ok(Array.isArray(body.BOND), 'BOND should be array');
  assert.ok(Array.isArray(body.ERROR), 'ERROR should be array');
  assert.ok(body.marketContext, 'marketContext should be present');
});

test('POST /api/screen → marketContext has expected shape', async () => {
  const app = await buildTestApp();
  const res = await app.inject({
    method: 'POST',
    url: '/api/screen',
    payload: { tickers: ['MSFT'] },
  });
  const { marketContext } = res.json();
  assert.ok(typeof marketContext.riskFreeRate === 'number');
  assert.ok(typeof marketContext.sp500Price === 'number');
  assert.ok(typeof marketContext.vixLevel === 'number');
  assert.ok(marketContext.benchmarks);
});

test('POST /api/screen with missing tickers → 400', async () => {
  const app = await buildTestApp();
  const res = await app.inject({
    method: 'POST',
    url: '/api/screen',
    payload: {},
  });
  assert.equal(res.statusCode, 400);
});

test('POST /api/screen with empty tickers array → 400', async () => {
  const app = await buildTestApp();
  const res = await app.inject({
    method: 'POST',
    url: '/api/screen',
    payload: { tickers: [] },
  });
  assert.equal(res.statusCode, 400);
});

test('POST /api/screen with too many tickers (>50) → 400', async () => {
  const app = await buildTestApp();
  const res = await app.inject({
    method: 'POST',
    url: '/api/screen',
    payload: { tickers: Array.from({ length: 51 }, (_, i) => `T${i}`) },
  });
  assert.equal(res.statusCode, 400);
});