<?php
// Start session
session_start();

require_once 'includes/config.php';
require_once 'includes/translation.php';

// Simulate different scenarios
echo "=== Testing Language Switching ===\n\n";

// Test 1: Default language (no session, no GET param)
$_SESSION = array(); // Clear session
$_GET = array(); // Clear GET params

$translation = Translation::getInstance();
echo "Test 1 - Default: " . $translation->getCurrentLanguage() . "\n";
echo "Session language: " . ($_SESSION['language'] ?? 'not set') . "\n\n";

// Test 2: Language parameter in URL
$_GET['lang'] = 'fi';
$translation = Translation::getInstance(); // Fresh instance
echo "Test 2 - With GET lang=fi: " . $translation->getCurrentLanguage() . "\n";
echo "Session language: " . ($_SESSION['language'] ?? 'not set') . "\n\n";

// Test 3: Session persistence
$_GET = array(); // Clear GET params
$translation = Translation::getInstance(); // Fresh instance
echo "Test 3 - Session persistence: " . $translation->getCurrentLanguage() . "\n";
echo "Session language: " . ($_SESSION['language'] ?? 'not set') . "\n\n";

// Test 4: Test translation
echo "Test 4 - Translation test:\n";
echo "English 'nav_home': " . $translation->translate('nav_home') . "\n";
echo "Finnish 'nav_home': " . $translation->translate('nav_home') . "\n\n";

// Test 5: Language switcher
echo "Test 5 - Language switcher HTML:\n";
echo $translation->getLanguageSwitcher('test.php') . "\n";
?>