<?php

/**
 * Site Settings Configuration
 * Loads site settings from SQLite database
 */

// Initialize default values
$SiteName = 'Infopump';
$SubName = 'A bibliographic display system';
$SiteURL = '';

try {
    // Establish database connection
    $sitesettings = new SQLite3('settings.sqlite', SQLITE3_OPEN_READONLY);
    $sitesettings->enableExceptions(true);
    
    // Fetch all settings in a single query for efficiency
    $stmt = $sitesettings->prepare('SELECT id, description FROM site WHERE id IN (1, 2, 3) ORDER BY id');
    $result = $stmt->execute();
    
    // Process results
    $settings = [];
    while ($row = $result->fetchArray(SQLITE3_ASSOC)) {
        $settings[(int)$row['id']] = $row['description'];
    }
    
    // Assign settings to variables with validation
    if (isset($settings[1]) && !empty(trim($settings[1]))) {
        $SiteName = htmlspecialchars(trim($settings[1]), ENT_QUOTES, 'UTF-8');
    }
    
    if (isset($settings[2]) && !empty(trim($settings[2]))) {
        $SubName = htmlspecialchars(trim($settings[2]), ENT_QUOTES, 'UTF-8');
    }
    
    if (isset($settings[3]) && !empty(trim($settings[3]))) {
        // Validate and sanitize URL
        $url = trim($settings[3]);
        // Remove trailing slash for consistency
        $url = rtrim($url, '/');
        // Basic URL validation
        if (filter_var($url, FILTER_VALIDATE_URL)) {
            $SiteURL = htmlspecialchars($url, ENT_QUOTES, 'UTF-8');
        } else {
            error_log("Invalid site URL in settings: " . $url);
        }
    }
    
    // Close database connection
    $sitesettings->close();
    
} catch (Exception $e) {
    // Log error but continue with default values
    error_log("Settings database error: " . $e->getMessage());
    
    // Ensure variables are set even if database fails
    if (!isset($SiteName)) $SiteName = 'Infopump';
    if (!isset($SubName)) $SubName = 'A bibliographic display system';
    if (!isset($SiteURL)) $SiteURL = '';
}

// Verify all required settings are defined
if (empty($SiteName) || empty($SubName)) {
    error_log("Critical site settings are missing or empty");
}

?>