<?php
/**
 * Database Connection Test
 * Tests basic database connectivity and query functionality
 */

require_once __DIR__ . '/../../src/Database.php';

echo "Database Connection Test\n";
echo "========================\n\n";

try {
    // Test 1: Database connection
    echo "Test 1: Database Connection\n";
    $db = Database::getInstance();
    echo "✓ PASS: Database connection successful\n\n";

    // Test 2: Count published theses
    echo "Test 2: Count Published Theses\n";
    $count = $db->countPublishedTheses();
    if ($count >= 0) {
        echo "✓ PASS: Found {$count} published theses\n\n";
    } else {
        throw new Exception("Invalid count returned");
    }

    // Test 3: Get published theses
    echo "Test 3: Get Published Theses\n";
    $theses = $db->getPublishedTheses(5, 0);
    if (is_array($theses)) {
        echo "✓ PASS: Retrieved " . count($theses) . " theses\n\n";
    } else {
        throw new Exception("Invalid theses array returned");
    }

    // Test 4: Get single thesis (if any exist)
    if (count($theses) > 0) {
        echo "Test 4: Get Single Thesis\n";
        $first = $theses[0];
        $thesis = $db->getThesisById($first['id']);
        
        if ($thesis && isset($thesis['id'])) {
            echo "✓ PASS: Successfully retrieved thesis #{$first['id']}\n";
            echo "  Title: " . $thesis['title'] . "\n";
            echo "  Author(s): " . ($thesis['authors'] ?? 'N/A') . "\n";
            echo "  Year: " . $thesis['year'] . "\n\n";
        } else {
            throw new Exception("Failed to retrieve thesis by ID");
        }
    }

    echo "✅ All database tests passed!\n";
    return true;

} catch (Exception $e) {
    echo "❌ FAIL: " . $e->getMessage() . "\n";
    return false;
}