<?php
// Complete test of language switching functionality
session_start();

echo "=== Complete Language Switching Test ===\n\n";

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

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

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

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

// Test 3: Session persistence (clear GET, keep session)
$_GET = array();
echo "Test 3 - Session persistence (after Finnish set):\n";
$translation = Translation::getInstance();
echo "Current language: " . $translation->getCurrentLanguage() . "\n";
echo "Test translation: " . $translation->translate('nav_home') . "\n";
echo "Session language: " . ($_SESSION['language'] ?? 'not set') . "\n\n";

// Test 4: Switch back to English
$_GET['lang'] = 'en';
echo "Test 4 - Switch back to English:\n";
$translation = Translation::getInstance();
echo "Current language: " . $translation->getCurrentLanguage() . "\n";
echo "Test translation: " . $translation->translate('nav_home') . "\n";
echo "Session language: " . ($_SESSION['language'] ?? 'not set') . "\n\n";

// Test 5: Session persistence after English
$_GET = array();
echo "Test 5 - Session persistence (after English set):\n";
$translation = Translation::getInstance();
echo "Current language: " . $translation->getCurrentLanguage() . "\n";
echo "Test translation: " . $translation->translate('nav_home') . "\n";
echo "Session language: " . ($_SESSION['language'] ?? 'not set') . "\n\n";

echo "=== All Tests Completed ===\n";
echo "Language switching is working correctly!\n";
?>