import { test } from 'node:test';
import assert from 'node:assert/strict';
import { EtfScorer } from '../src/screener/scorers/EtfScorer.js';

const rules = {
  gates: { maxExpenseRatio: 0.5 },
  weights: { yield: 2, lowCost: 3 },
  thresholds: { minYield: 1.5, maxExpense: 0.1, minVolume: 500000 },
};

test('rejects ETF with expense ratio above gate', () => {
  const result = EtfScorer.score({ expenseRatio: 0.8, yield: 2.0 }, rules);
  assert.equal(result.label, '🔴 REJECT');
});

test('efficient label for low-cost, high-yield ETF', () => {
  const result = EtfScorer.score({ expenseRatio: 0.03, yield: 2.0, volume: 1000000 }, rules);
  assert.equal(result.label, '🟢 Efficient');
});

test('neutral when yield is below threshold', () => {
  const result = EtfScorer.score({ expenseRatio: 0.03, yield: 0.4, volume: 1000000 }, rules);
  assert.equal(result.label, '🟡 Neutral');
});

test('audit breakdown includes cost, yield, vol keys', () => {
  const result = EtfScorer.score({ expenseRatio: 0.03, yield: 2.0, volume: 1000000 }, rules);
  assert(result.audit.breakdown.cost != null);
  assert(result.audit.breakdown.yield != null);
  assert(result.audit.breakdown.vol != null);
});