'use strict';

// QA-B5-02 regression: the SimpleFIN bank-tracking `unpaid_this_month` metric must
// only count bills that actually occur in the requested month — annual / off-month
// quarterly bills should not inflate it (same occurrence gate as Tracker/Summary).
const test = require('node:test');
const assert = require('node:assert/strict');
const os = require('node:os');
const path = require('node:path');
const fs = require('node:fs');

const dbPath = path.join(os.tmpdir(), `bill-tracker-summary-bt-test-${process.pid}.sqlite`);
process.env.DB_PATH = dbPath;

const { getDb, closeDb } = require('../db/database');

function callSummary(userId, year, month) {
  const router = require('../routes/summary');
  const layer = router.stack.find(item => item.route?.path === '/' && item.route.methods.get);
  assert.ok(layer, 'GET /api/summary route should exist');
  const handler = layer.route.stack[0].handle;
  return new Promise((resolve) => {
    const req = { query: { year: String(year), month: String(month) }, user: { id: userId, role: 'user' } };
    const res = {
      statusCode: 200,
      status(code) { this.statusCode = code; return this; },
      json(data) { resolve({ status: this.statusCode, data }); },
    };
    handler(req, res);
  });
}

test('bank-tracking unpaid_this_month excludes bills not due this month (QA-B5-02)', async () => {
  const db = getDb();
  const userId = db.prepare(
    "INSERT INTO users (username, password_hash, role, active) VALUES ('bt-user', 'x', 'user', 1)",
  ).run().lastInsertRowid;

  const insertBill = db.prepare(`
    INSERT INTO bills (user_id, name, due_day, billing_cycle, cycle_type, cycle_day, expected_amount, active)
    VALUES (?, ?, ?, ?, ?, ?, ?, 1)
  `);
  // Due every June (query month): counts.
  insertBill.run(userId, 'Monthly Bill', 15, 'monthly', 'monthly', null, 10000); // $100
  // Annual, anchored to January: NOT due in June — must be excluded.
  insertBill.run(userId, 'Annual Bill', 1, 'annually', 'annual', '1', 50000); // $500

  // Enable bank tracking pointed at a financial account with a balance.
  const acctId = db.prepare(`
    INSERT INTO financial_accounts (user_id, name, org_name, account_type, balance, available_balance, monitored)
    VALUES (?, 'Checking', 'Test Bank', 'checking', 200000, 200000, 1)
  `).run(userId).lastInsertRowid;
  const setSetting = db.prepare('INSERT INTO user_settings (user_id, key, value) VALUES (?, ?, ?)');
  setSetting.run(userId, 'bank_tracking_enabled', 'true');
  setSetting.run(userId, 'bank_tracking_account_id', String(acctId));

  const { data } = await callSummary(userId, 2026, 6); // June 2026

  assert.ok(data.bank_tracking, 'bank_tracking summary should be present when enabled');
  // Only the $100 monthly bill is due in June; the $500 annual bill (Jan) is excluded.
  assert.equal(data.bank_tracking.unpaid_this_month, 100);
});

test.after(() => {
  closeDb();
  for (const suffix of ['', '-wal', '-shm']) {
    try { fs.rmSync(dbPath + suffix); } catch { /* ignore */ }
  }
});