<?php
/**
 * Configuration file - Database connection and WooCommerce client
 */

use Automattic\WooCommerce\Client;

/**
 * Get database connection (Sales Panel database)
 * @return mysqli
 */
function getDatabase(): mysqli
{
    static $db = null;
    
    if ($db === null) {
        $db = new mysqli(
            $_ENV['DB_HOST'],
            $_ENV['DB_USER'],
            $_ENV['DB_PASS'],
            $_ENV['DB_NAME']
        );
        
        if ($db->connect_error) {
            header('Content-Type: application/json');
            http_response_code(500);
            die(json_encode(['error' => 'Database connectie mislukt']));
        }
        
        $db->set_charset('utf8mb4');
    }
    
    return $db;
}

/**
 * Get WooCommerce database connection (WordPress/WooCommerce database)
 * Used for accessing plugin tables like wp_wdr_rules
 * @return mysqli
 */
function getWooCommerceDatabase(): mysqli
{
    static $wcDb = null;
    
    if ($wcDb === null) {
        $wcDb = new mysqli(
            $_ENV['WC_DB_HOST'] ?? $_ENV['DB_HOST'],
            $_ENV['WC_DB_USER'] ?? $_ENV['DB_USER'],
            $_ENV['WC_DB_PASS'] ?? $_ENV['DB_PASS'],
            $_ENV['WC_DB_NAME'] ?? $_ENV['DB_NAME']
        );
        
        if ($wcDb->connect_error) {
            header('Content-Type: application/json');
            http_response_code(500);
            die(json_encode(['error' => 'WooCommerce database connectie mislukt: ' . $wcDb->connect_error]));
        }
        
        $wcDb->set_charset('utf8mb4');
    }
    
    return $wcDb;
}

/**
 * Get WooCommerce database table prefix
 * @return string
 */
function getWooCommerceDbPrefix(): string
{
    return $_ENV['WC_DB_PREFIX'] ?? 'wp_';
}

/**
 * Get WooCommerce client
 * @return Client
 */
function getWooCommerce(): Client
{
    static $woocommerce = null;
    
    if ($woocommerce === null) {
        $woocommerce = new Client(
            $_ENV['WC_URL'],
            $_ENV['WC_KEY'],
            $_ENV['WC_SECRET'],
            ['version' => 'wc/v3', 'verify_ssl' => false]
        );
    }
    
    return $woocommerce;
}