<?php
/**
 * Zoho CRM Sync Handler
 *
 * @package HVACCommunityEvents
 */

if (!defined('ABSPATH')) {
    exit;
}

/**
 * Zoho Sync Class
 */
class HVAC_Zoho_Sync {
    
    /**
     * Zoho Auth instance
     *
     * @var HVAC_Zoho_CRM_Auth
     */
    private $auth;
    
    /**
     * Staging mode flag
     *
     * @var bool
     */
    private $is_staging;
    
    /**
     * Constructor
     */
    public function __construct() {
        require_once HVAC_PLUGIN_DIR . 'includes/zoho/class-zoho-crm-auth.php';
        $this->auth = new HVAC_Zoho_CRM_Auth();
        
        // Determine if we're in staging mode
        $site_url = get_site_url();
        $this->is_staging = strpos($site_url, 'upskillhvac.com') === false;
    }
    
    /**
     * Check if sync is allowed
     *
     * @return bool
     */
    private function is_sync_allowed() {
        // Only allow sync on production (upskillhvac.com)
        $site_url = get_site_url();
        return strpos($site_url, 'upskillhvac.com') !== false;
    }
    
    /**
     * Sync events to Zoho Campaigns
     *
     * @return array Sync results
     */
    public function sync_events() {
        $results = array(
            'total' => 0,
            'synced' => 0,
            'failed' => 0,
            'errors' => array(),
            'staging_mode' => $this->is_staging
        );
        
        // Get all published events
        $events = tribe_get_events(array(
            'posts_per_page' => -1,
            'eventDisplay' => 'list',
            'meta_query' => array(
                array(
                    'key' => '_hvac_event_type',
                    'value' => 'trainer',
                    'compare' => '='
                )
            )
        ));
        
        $results['total'] = count($events);
        
        // If staging mode, simulate the sync
        if ($this->is_staging) {
            $results['message'] = 'STAGING MODE: Sync simulation only. No data sent to Zoho.';
            $results['synced'] = $results['total'];
            $results['test_data'] = array();
            
            foreach ($events as $event) {
                $campaign_data = $this->prepare_campaign_data($event);
                $results['test_data'][] = array(
                    'event_id' => $event->ID,
                    'event_title' => get_the_title($event),
                    'zoho_data' => $campaign_data
                );
            }
            
            return $results;
        }
        
        // Production sync
        if (!$this->is_sync_allowed()) {
            $results['errors'][] = 'Sync not allowed on this domain. Only upskillhvac.com can sync to production.';
            return $results;
        }
        
        foreach ($events as $event) {
            try {
                $campaign_data = $this->prepare_campaign_data($event);
                
                // Check if campaign already exists in Zoho
                $search_response = $this->auth->make_api_request('GET', '/crm/v2/Campaigns/search', array(
                    'criteria' => "(Campaign_Name:equals:{$campaign_data['Campaign_Name']})"
                ));
                
                if (!empty($search_response['data'])) {
                    // Update existing campaign
                    $campaign_id = $search_response['data'][0]['id'];
                    $update_response = $this->auth->make_api_request('PUT', "/crm/v2/Campaigns/{$campaign_id}", array(
                        'data' => array($campaign_data)
                    ));
                } else {
                    // Create new campaign
                    $create_response = $this->auth->make_api_request('POST', '/crm/v2/Campaigns', array(
                        'data' => array($campaign_data)
                    ));
                }
                
                $results['synced']++;
                
                // Update event meta with Zoho ID
                if (isset($campaign_id)) {
                    update_post_meta($event->ID, '_zoho_campaign_id', $campaign_id);
                }
                
            } catch (Exception $e) {
                $results['failed']++;
                $results['errors'][] = sprintf('Event %s: %s', $event->ID, $e->getMessage());
            }
        }
        
        return $results;
    }
    
    /**
     * Sync users to Zoho Contacts
     *
     * @return array Sync results
     */
    public function sync_users() {
        $results = array(
            'total' => 0,
            'synced' => 0,
            'failed' => 0,
            'errors' => array(),
            'staging_mode' => $this->is_staging
        );
        
        // Get trainers and attendees
        $users = get_users(array(
            'role__in' => array('trainer', 'trainee'),
            'meta_query' => array(
                'relation' => 'OR',
                array(
                    'key' => '_sync_to_zoho',
                    'value' => '1',
                    'compare' => '='
                ),
                array(
                    'key' => '_sync_to_zoho',
                    'compare' => 'NOT EXISTS'
                )
            )
        ));
        
        $results['total'] = count($users);
        
        // If staging mode, simulate the sync
        if ($this->is_staging) {
            $results['message'] = 'STAGING MODE: Sync simulation only. No data sent to Zoho.';
            $results['synced'] = $results['total'];
            $results['test_data'] = array();
            
            foreach ($users as $user) {
                $contact_data = $this->prepare_contact_data($user);
                $results['test_data'][] = array(
                    'user_id' => $user->ID,
                    'user_email' => $user->user_email,
                    'user_role' => implode(', ', $user->roles),
                    'zoho_data' => $contact_data
                );
            }
            
            return $results;
        }
        
        // Production sync
        if (!$this->is_sync_allowed()) {
            $results['errors'][] = 'Sync not allowed on this domain. Only upskillhvac.com can sync to production.';
            return $results;
        }
        
        foreach ($users as $user) {
            try {
                $contact_data = $this->prepare_contact_data($user);
                
                // Check if contact already exists in Zoho
                $search_response = $this->auth->make_api_request('GET', '/crm/v2/Contacts/search', array(
                    'criteria' => "(Email:equals:{$contact_data['Email']})"
                ));
                
                if (!empty($search_response['data'])) {
                    // Update existing contact
                    $contact_id = $search_response['data'][0]['id'];
                    $update_response = $this->auth->make_api_request('PUT', "/crm/v2/Contacts/{$contact_id}", array(
                        'data' => array($contact_data)
                    ));
                } else {
                    // Create new contact
                    $create_response = $this->auth->make_api_request('POST', '/crm/v2/Contacts', array(
                        'data' => array($contact_data)
                    ));
                    
                    if (!empty($create_response['data'][0]['details']['id'])) {
                        $contact_id = $create_response['data'][0]['details']['id'];
                    }
                }
                
                $results['synced']++;
                
                // Update user meta with Zoho ID
                if (isset($contact_id)) {
                    update_user_meta($user->ID, '_zoho_contact_id', $contact_id);
                }
                
            } catch (Exception $e) {
                $results['failed']++;
                $results['errors'][] = sprintf('User %s: %s', $user->ID, $e->getMessage());
            }
        }
        
        return $results;
    }
    
    /**
     * Sync ticket purchases to Zoho Invoices
     *
     * @return array Sync results
     */
    public function sync_purchases() {
        $results = array(
            'total' => 0,
            'synced' => 0,
            'failed' => 0,
            'errors' => array(),
            'staging_mode' => $this->is_staging
        );
        
        // Get all completed orders
        $orders = wc_get_orders(array(
            'status' => 'completed',
            'limit' => -1,
            'meta_key' => '_tribe_tickets_event_id',
            'meta_compare' => 'EXISTS'
        ));
        
        $results['total'] = count($orders);
        
        // If staging mode, simulate the sync
        if ($this->is_staging) {
            $results['message'] = 'STAGING MODE: Sync simulation only. No data sent to Zoho.';
            $results['synced'] = $results['total'];
            $results['test_data'] = array();
            
            foreach ($orders as $order) {
                $invoice_data = $this->prepare_invoice_data($order);
                $results['test_data'][] = array(
                    'order_id' => $order->get_id(),
                    'order_number' => $order->get_order_number(),
                    'order_total' => $order->get_total(),
                    'zoho_data' => $invoice_data
                );
            }
            
            return $results;
        }
        
        // Production sync
        if (!$this->is_sync_allowed()) {
            $results['errors'][] = 'Sync not allowed on this domain. Only upskillhvac.com can sync to production.';
            return $results;
        }
        
        foreach ($orders as $order) {
            try {
                $invoice_data = $this->prepare_invoice_data($order);
                
                // Check if invoice already exists in Zoho
                $order_number = $order->get_order_number();
                $search_response = $this->auth->make_api_request('GET', '/crm/v2/Invoices/search', array(
                    'criteria' => "(Invoice_Number:equals:{$order_number})"
                ));
                
                if (!empty($search_response['data'])) {
                    // Update existing invoice
                    $invoice_id = $search_response['data'][0]['id'];
                    $update_response = $this->auth->make_api_request('PUT', "/crm/v2/Invoices/{$invoice_id}", array(
                        'data' => array($invoice_data)
                    ));
                } else {
                    // Create new invoice
                    $create_response = $this->auth->make_api_request('POST', '/crm/v2/Invoices', array(
                        'data' => array($invoice_data)
                    ));
                }
                
                $results['synced']++;
                
                // Update order meta with Zoho ID
                if (isset($invoice_id)) {
                    $order->update_meta_data('_zoho_invoice_id', $invoice_id);
                    $order->save();
                }
                
            } catch (Exception $e) {
                $results['failed']++;
                $results['errors'][] = sprintf('Order %s: %s', $order->get_id(), $e->getMessage());
            }
        }
        
        return $results;
    }
    
    /**
     * Prepare campaign data for Zoho
     *
     * @param WP_Post $event Event post object
     * @return array Campaign data
     */
    private function prepare_campaign_data($event) {
        $trainer_id = get_post_meta($event->ID, '_trainer_id', true);
        $trainer = get_user_by('id', $trainer_id);
        $venue = tribe_get_venue($event->ID);
        
        return array(
            'Campaign_Name' => get_the_title($event->ID),
            'Start_Date' => tribe_get_start_date($event->ID, false, 'Y-m-d'),
            'End_Date' => tribe_get_end_date($event->ID, false, 'Y-m-d'),
            'Status' => (tribe_get_end_date($event->ID, false, 'U') < time()) ? 'Completed' : 'Active',
            'Description' => get_the_content(null, false, $event),
            'Type' => 'Training Event',
            'Expected_Revenue' => floatval(get_post_meta($event->ID, '_price', true)),
            'Total_Capacity' => intval(get_post_meta($event->ID, '_stock', true)),
            'Venue' => $venue ? get_the_title($venue) : '',
            'Trainer_Name' => $trainer ? $trainer->display_name : '',
            'Trainer_Email' => $trainer ? $trainer->user_email : '',
            'WordPress_Event_ID' => $event->ID
        );
    }
    
    /**
     * Prepare contact data for Zoho
     *
     * @param WP_User $user User object
     * @return array Contact data
     */
    private function prepare_contact_data($user) {
        $role = in_array('trainer', $user->roles) ? 'Trainer' : 'Trainee';
        
        return array(
            'First_Name' => get_user_meta($user->ID, 'first_name', true),
            'Last_Name' => get_user_meta($user->ID, 'last_name', true),
            'Email' => $user->user_email,
            'Phone' => get_user_meta($user->ID, 'phone_number', true),
            'Title' => get_user_meta($user->ID, 'hvac_professional_title', true),
            'Company' => get_user_meta($user->ID, 'hvac_company_name', true),
            'Lead_Source' => 'HVAC Community Events',
            'Contact_Type' => $role,
            'WordPress_User_ID' => $user->ID,
            'License_Number' => get_user_meta($user->ID, 'hvac_license_number', true),
            'Years_Experience' => get_user_meta($user->ID, 'hvac_years_experience', true),
            'Certification' => get_user_meta($user->ID, 'hvac_certifications', true)
        );
    }
    
    /**
     * Prepare invoice data for Zoho
     *
     * @param WC_Order $order Order object
     * @return array Invoice data
     */
    private function prepare_invoice_data($order) {
        $event_id = $order->get_meta('_tribe_tickets_event_id');
        $event_title = get_the_title($event_id);
        $customer = $order->get_user();
        
        // Get contact ID from Zoho
        $contact_id = null;
        if ($customer) {
            $contact_id = get_user_meta($customer->ID, '_zoho_contact_id', true);
        }
        
        $items = array();
        foreach ($order->get_items() as $item) {
            $items[] = array(
                'Product_Name' => $item->get_name(),
                'Quantity' => $item->get_quantity(),
                'Rate' => $item->get_subtotal() / $item->get_quantity(),
                'Total' => $item->get_total()
            );
        }
        
        return array(
            'Invoice_Number' => $order->get_order_number(),
            'Invoice_Date' => $order->get_date_created()->format('Y-m-d'),
            'Status' => 'Paid',
            'Contact_Name' => $contact_id,
            'Subject' => "Ticket Purchase - {$event_title}",
            'Sub_Total' => $order->get_subtotal(),
            'Tax' => $order->get_total_tax(),
            'Total' => $order->get_total(),
            'Balance' => 0,
            'WordPress_Order_ID' => $order->get_id(),
            'Product_Details' => $items
        );
    }
}
?>