class GHMS_Install {
    public static function install() {
        self::create_tables();
        self::seed_initial_data();
    }

    private static function create_tables() {
        global $wpdb;
        $charset_collate = $wpdb->get_charset_collate();

        $tables = [
            "CREATE TABLE {$wpdb->prefix}ghms_agricultural_cycles (
                id int(11) NOT NULL AUTO_INCREMENT,
                sub_id int(11) DEFAULT NULL,
                line_id int(11) DEFAULT NULL,
                flower_type_id int(11) DEFAULT NULL,
                start_date date DEFAULT NULL,
                expected_date date DEFAULT NULL,
                harvest_date date DEFAULT NULL,
                status enum('planned','active','completed','aborted') DEFAULT 'planned',
                PRIMARY KEY (id),
                KEY sub_id (sub_id),
                KEY line_id (line_id),
                KEY flower_type_id (flower_type_id)
            ) $charset_collate;",
            
            // Add all other tables from your SQL dump
        ];

        require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
        foreach ($tables as $table) {
            dbDelta($table);
        }
    }
}class GHMS_Tasks {
    public function __construct() {
        add_action('ghms_daily_maintenance', array($this, 'check_scheduled_tasks'));
        add_action('init', array($this, 'schedule_events'));
    }
    
    public function schedule_events() {
        if (!wp_next_scheduled('ghms_daily_maintenance')) {
            wp_schedule_event(time(), 'daily', 'ghms_daily_maintenance');
        }
    }
    
    public function check_scheduled_tasks() {
        $today = current_time('Y-m-d');
        $due_tasks = GHMS_Database::get_instance()->get_tasks_due_on($today);
        
        foreach ($due_tasks as $task) {
            $this->send_task_reminder($task);
        }
    }
    
    private function send_task_reminder($task) {
        $employee = GHMS_Database::get_instance()->get_employee($task->assigned_to);
        $user = get_user_by('id', $employee->user_id);
        
        if ($user) {
            $subject = sprintf(__('Reminder: %s task due today', 'ghms'), $task->task_type);
            $message = sprintf(
                __('Hello %s, you have a %s task scheduled for today. Details: %s', 'ghms'),
                $user->display_name,
                $task->task_type,
                $task->notes
            );
            
            wp_mail($user->user_email, $subject, $message);
        }
    }
}class GHMS_WooCommerce {
    public function __construct() {
        add_action('save_post_product', array($this, 'sync_product_with_ghms'), 10, 3);
        add_action('woocommerce_order_status_changed', array($this, 'handle_order_status_change'), 10, 3);
    }
    
    public function sync_product_with_ghms($post_id, $post, $update) {
        if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;
        if ($post->post_type != 'product') return;
        
        $product = wc_get_product($post_id);
        $flower_type_id = get_post_meta($post_id, '_ghms_flower_type_id', true);
        
        if ($flower_type_id) {
            // Update existing flower type
            GHMS_Database::get_instance()->update_flower_type($flower_type_id, [
                'name' => $product->get_name(),
                'wc_product_id' => $post_id,
                'wc_last_sync' => current_time('mysql')
            ]);
        } else {
            // Create new flower type
            $flower_type_id = GHMS_Database::get_instance()->insert_flower_type([
                'wc_product_id' => $post_id,
                'name' => $product->get_name(),
                'wc_last_sync' => current_time('mysql')
            ]);
            update_post_meta($post_id, '_ghms_flower_type_id', $flower_type_id);
        }
    }
    
    public function handle_order_status_change($order_id, $old_status, $new_status) {
        if ($new_status == 'completed') {
            $order = wc_get_order($order_id);
            
            foreach ($order->get_items() as $item) {
                $product_id = $item->get_product_id();
                $flower_type_id = get_post_meta($product_id, '_ghms_flower_type_id', true);
                
                if ($flower_type_id) {
                    GHMS_Database::get_instance()->record_sale([
                        'flower_type_id' => $flower_type_id,
                        'wc_order_id' => $order_id,
                        'sold_quantity' => $item->get_quantity(),
                        'sale_date' => current_time('mysql')
                    ]);
                }
            }
        }
    }
}<br />
<b>Fatal error</b>:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class GHMS_Core does not have a method &quot;init&quot; in /home4/umifydmy/public_html/wp-includes/class-wp-hook.php:324
Stack trace:
#0 /home4/umifydmy/public_html/wp-includes/class-wp-hook.php(348): WP_Hook-&gt;apply_filters(NULL, Array)
#1 /home4/umifydmy/public_html/wp-includes/plugin.php(517): WP_Hook-&gt;do_action(Array)
#2 /home4/umifydmy/public_html/wp-settings.php(727): do_action('init')
#3 /home4/umifydmy/public_html/wp-config.php(121): require_once('/home4/umifydmy...')
#4 /home4/umifydmy/public_html/wp-load.php(50): require_once('/home4/umifydmy...')
#5 /home4/umifydmy/public_html/wp-blog-header.php(13): require_once('/home4/umifydmy...')
#6 /home4/umifydmy/public_html/index.php(17): require('/home4/umifydmy...')
#7 {main}
  thrown in <b>/home4/umifydmy/public_html/wp-includes/class-wp-hook.php</b> on line <b>324</b><br />