// Integration test for user preferences defaultProviders persistence (Step 9)
// Run with: node server/tests/preferences.test.mjs

import fs from 'node:fs';
import path from 'node:path';
import os from 'node:os';

// Create isolated temp DB file
const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'newtube-prefs-test-'));
const dbPath = path.join(tmpDir, 'test.db');
process.env.NEWTUBE_DB_FILE = dbPath;

// Dynamically import DB after setting env
const dbMod = await import('../db.mjs');
const { insertUser, cryptoRandomUUID, upsertPreferences, getPreferencesForApi } = dbMod;

function expect(cond, msg) {
  if (!cond) {
    throw new Error(`Assertion failed: ${msg}`);
  }
}

function logOk(msg) {
  console.log(`✓ ${msg}`);
}

const user = cryptoRandomUUID();
insertUser({ id: user, username: 'prefs-a', email: null, passwordHash: 'x' });

// 1) Fresh user: no defaultProviders yet
let prefs = getPreferencesForApi(user);
expect(prefs && Array.isArray(prefs.defaultProviders) && prefs.defaultProviders.length === 0 || prefs.defaultProviders === null,
  'fresh user has no defaultProviders');
logOk('fresh user defaultProviders empty');

// 2) Save a multi-provider default: round-trip through JSON column
upsertPreferences(user, { defaultProviders: ['yt', 'dm'] });
prefs = getPreferencesForApi(user);
expect(Array.isArray(prefs.defaultProviders) && prefs.defaultProviders.join(',') === 'yt,dm',
  `defaultProviders round-trips (got ${JSON.stringify(prefs.defaultProviders)})`);
logOk('defaultProviders persisted and read back as array');

// 3) Sanitization: unknown ids dropped, case/duplicates handled, JSON string accepted
upsertPreferences(user, { defaultProviders: ['YT', 'zz', 'dm', 'yt'] });
prefs = getPreferencesForApi(user);
expect(prefs.defaultProviders.join(',') === 'yt,dm',
  `unknown ids dropped and deduped (got ${JSON.stringify(prefs.defaultProviders)})`);
logOk('sanitization of provider ids');

// 4) Partial update: patching another field keeps the stored list
upsertPreferences(user, { theme: 'dark' });
prefs = getPreferencesForApi(user);
expect(prefs.theme === 'dark' && prefs.defaultProviders.join(',') === 'yt,dm',
  'partial update preserves defaultProviders');
logOk('partial update preserves list');

// 5) Empty array clears the preference
upsertPreferences(user, { defaultProviders: [] });
prefs = getPreferencesForApi(user);
expect(prefs.defaultProviders === null, 'empty array clears the list');
logOk('empty array clears defaultProviders');

// 6) Other patches still work after clearing
upsertPreferences(user, { language: 'fr' });
prefs = getPreferencesForApi(user);
expect(prefs.language === 'fr' && prefs.defaultProviders === null, 'language patch ok');
logOk('other preference fields unaffected');

console.log('\nAll preferences tests passed.');