/**
 * Integration tests for FinanceController
 * Uses Fastify inject() with stub engine, advisor, and in-memory portfolio repo.
 */

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

// ── Stubs ────────────────────────────────────────────────────────────────────

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,
};

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

const stubAdvisor = {
  advise: async () => [],
} as unknown as PortfolioAdvisor;

// In-memory PortfolioRepository stub
function makePortfolioRepo(seed: PortfolioHolding[] = []) {
  const holdings: PortfolioHolding[] = [...seed];
  return {
    exists: () => true,
    read: () => ({ holdings: [...holdings] }),
    upsert: (entry: PortfolioHolding) => {
      const idx = holdings.findIndex((h) => h.ticker === entry.ticker);
      if (idx >= 0) holdings[idx] = entry;
      else holdings.push(entry);
      return entry;
    },
    remove: (ticker: string) => {
      const idx = holdings.findIndex((h) => h.ticker === ticker);
      if (idx === -1) return false;
      holdings.splice(idx, 1);
      return true;
    },
  };
}

function makeEmptyRepo() {
  return {
    exists: () => false,
    read: () => ({ holdings: [] }),
    upsert: () => {},
    remove: () => false,
  };
}

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

async function buildTestApp(repo = makePortfolioRepo()) {
  const app = Fastify({ logger: false });
  await app.register(cors, { origin: '*' });
  new FinanceController(stubEngine, repo as any, stubAdvisor).register(app);
  await app.ready();
  return app;
}

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

test('GET /api/finance/portfolio → 200 with advice and marketContext keys', async () => {
  const app = await buildTestApp();
  const res = await app.inject({ method: 'GET', url: '/api/finance/portfolio' });
  assert.equal(res.statusCode, 200);
  const body = res.json();
  assert.ok(Array.isArray(body.advice), 'advice should be array');
  assert.ok(body.marketContext, 'marketContext should be present');
});

test('GET /api/finance/portfolio with no portfolio.json → 404', async () => {
  const app = await buildTestApp(makeEmptyRepo() as any);
  const res = await app.inject({ method: 'GET', url: '/api/finance/portfolio' });
  assert.equal(res.statusCode, 404);
});

test('GET /api/finance/market-context → 200 with benchmark fields', async () => {
  const app = await buildTestApp();
  const res = await app.inject({ method: 'GET', url: '/api/finance/market-context' });
  assert.equal(res.statusCode, 200);
  const body = res.json();
  assert.ok(typeof body.riskFreeRate === 'number');
  assert.ok(typeof body.sp500Price === 'number');
  assert.ok(body.benchmarks);
});

test('POST /api/finance/holdings → 201 and returns the holding', async () => {
  const app = await buildTestApp();
  const res = await app.inject({
    method: 'POST',
    url: '/api/finance/holdings',
    payload: { ticker: 'AAPL', shares: 10, costBasis: 150, type: 'stock', source: 'Robinhood' },
  });
  assert.equal(res.statusCode, 201);
  const body = res.json();
  assert.equal(body.ticker, 'AAPL');
  assert.equal(body.shares, 10);
});

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

test('POST /api/finance/holdings with missing ticker → 400', async () => {
  const app = await buildTestApp();
  const res = await app.inject({
    method: 'POST',
    url: '/api/finance/holdings',
    payload: { shares: 5 },
  });
  assert.equal(res.statusCode, 400);
});

test('POST /api/finance/holdings with zero shares → 400', async () => {
  const app = await buildTestApp();
  const res = await app.inject({
    method: 'POST',
    url: '/api/finance/holdings',
    payload: { ticker: 'AAPL', shares: 0 },
  });
  assert.equal(res.statusCode, 400);
});

test('POST /api/finance/holdings with invalid type → 400', async () => {
  const app = await buildTestApp();
  const res = await app.inject({
    method: 'POST',
    url: '/api/finance/holdings',
    payload: { ticker: 'AAPL', shares: 5, type: 'options' },
  });
  assert.equal(res.statusCode, 400);
});

test('DELETE /api/finance/holdings/:ticker removes existing holding → 200', async () => {
  const repo = makePortfolioRepo([
    { ticker: 'MSFT', shares: 5, costBasis: 300, type: 'stock', source: 'Manual' },
  ]);
  const app = await buildTestApp(repo);
  const res = await app.inject({ method: 'DELETE', url: '/api/finance/holdings/MSFT' });
  assert.equal(res.statusCode, 200);
  assert.deepEqual(res.json(), { ok: true });
});

test('DELETE /api/finance/holdings/:ticker on missing ticker → 404', async () => {
  const app = await buildTestApp();
  const res = await app.inject({ method: 'DELETE', url: '/api/finance/holdings/NOTHERE' });
  assert.equal(res.statusCode, 404);
});