const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const os = require('node:os');
const path = require('node:path');

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

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

function createUser(db, suffix) {
  return db.prepare(`
    INSERT INTO users (username, password_hash, role, active, email, created_at, updated_at)
    VALUES (?, 'x', 'user', 1, ?, datetime('now'), datetime('now'))
  `).run(`subscription-user-${suffix}`, `subscription-user-${suffix}@local`).lastInsertRowid;
}

function createTransaction(db, userId, overrides = {}) {
  return db.prepare(`
    INSERT INTO transactions
      (user_id, source_type, account_id, posted_date, amount, currency, description, payee, match_status, ignored)
    VALUES (?, 'manual', ?, ?, ?, 'USD', ?, ?, 'unmatched', 0)
  `).run(
    userId,
    overrides.account_id || null,
    overrides.posted_date || new Date().toISOString().slice(0, 10),
    overrides.amount ?? -1599,
    overrides.description || 'NETFLIX.COM',
    overrides.payee || 'NETFLIX.COM',
  ).lastInsertRowid;
}

function createAccount(db, userId, monitored = true) {
  const sourceId = db.prepare(`
    INSERT INTO data_sources (user_id, type, provider, name, status)
    VALUES (?, 'provider_sync', 'simplefin', 'SimpleFIN', 'active')
  `).run(userId).lastInsertRowid;

  return db.prepare(`
    INSERT INTO financial_accounts
      (user_id, data_source_id, provider_account_id, name, currency, monitored)
    VALUES (?, ?, ?, 'Checking', 'USD', ?)
  `).run(userId, sourceId, `acct-${sourceId}`, monitored ? 1 : 0).lastInsertRowid;
}

test.after(() => {
  closeDb();
  for (const suffix of ['', '-wal', '-shm']) {
    fs.rmSync(`${dbPath}${suffix}`, { force: true });
  }
});

test('known catalog services appear as high-confidence subscription recommendations', () => {
  const db = getDb();
  const userId = createUser(db, 'recommendation');
  const accountId = createAccount(db, userId, true);
  createTransaction(db, userId, { account_id: accountId });

  const recommendations = getSubscriptionRecommendations(db, userId);
  const netflix = recommendations.find(item => item.catalog_match?.name === 'Netflix');

  assert.ok(netflix, 'Netflix catalog match should be recommended from one known charge');
  assert.equal(netflix.subscription_type, 'streaming');
  assert.equal(netflix.confidence >= 90, true);
  assert.deepEqual(netflix.accounts, ['Checking']);
  assert.match(netflix.reasons.join(' '), /Matches known service: Netflix/);
});

test('subscription transaction search annotates known catalog matches', () => {
  const db = getDb();
  const userId = createUser(db, 'search');
  const transactionId = createTransaction(db, userId, {
    description: 'NETFLIX.COM 866-579-7172',
    payee: 'NETFLIX.COM',
  });

  const matches = searchSubscriptionTransactions(db, userId, { q: 'netflix', limit: 10 });
  const match = matches.find(item => item.id === transactionId);

  assert.ok(match, 'transaction should be returned by subscription search');
  assert.equal(match.is_known_subscription, true);
  assert.equal(match.catalog_match.name, 'Netflix');
  assert.equal(match.catalog_match.subscription_type, 'streaming');
});

test('Claude.ai catalog seed matches Anthropic transaction descriptors', () => {
  const db = getDb();
  const userId = createUser(db, 'claude');
  const transactionId = createTransaction(db, userId, {
    description: 'ANTHROPIC CLAUDE PRO',
    payee: 'ANTHROPIC',
    amount: -2000,
  });

  const matches = searchSubscriptionTransactions(db, userId, { q: 'anthropic', limit: 10 });
  const match = matches.find(item => item.id === transactionId);

  assert.ok(match, 'Anthropic transaction should be returned by subscription search');
  assert.equal(match.is_known_subscription, true);
  assert.equal(match.catalog_match.name, 'Claude.ai');
  assert.equal(match.catalog_match.subscription_type, 'software');
});

test('subscription recommendations and search ignore unmonitored SimpleFIN accounts', () => {
  const db = getDb();
  const userId = createUser(db, 'unmonitored');
  const accountId = createAccount(db, userId, false);
  const transactionId = createTransaction(db, userId, {
    account_id: accountId,
    description: 'NETFLIX.COM 866-579-7172',
    payee: 'NETFLIX.COM',
  });

  const recommendations = getSubscriptionRecommendations(db, userId);
  assert.equal(recommendations.some(item => item.catalog_match?.name === 'Netflix'), false);

  const matches = searchSubscriptionTransactions(db, userId, { q: 'netflix', limit: 10 });
  assert.equal(matches.some(item => item.id === transactionId), false);
});