<?php
namespace PixelYourSite;

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly.
}


class AjaxHookEventManager {

    public static $DIV_ID_FOR_AJAX_EVENTS = "pys_ajax_events";
    private static $_instance;

    static function addPendingEvent($name,$event) {
        $events = WC()->session->get( 'pys_events', array() );
        $events[$name] = $event;
        WC()->session->set( 'pys_events', $events );
        WC()->session->save_data();
    }

    /**
     * @param $name
     * @param $slug
     * @return mixed|null
     */
    static function getPendingEvent($name,$unset) {
        if ( function_exists( 'WC' ) ) {
            if(!WC()->session) return null;
            $session_data = WC()->session->get_session_data();
            $events = isset( $session_data['pys_events'] ) ? WC()->session->get( 'pys_events', array() ) : array();
            if (isset($events[$name])) {
                $event = $events[$name];
                if ($unset) {
                    unset($events[$name]);
                    WC()->session->set('pys_events', $events);
                    WC()->session->save_data();
                }
                return $event;
            }
            return null;
        }
        return null;
    }

    public static function instance() {

        if ( is_null( self::$_instance ) ) {
            self::$_instance = new self();
        }

        return self::$_instance;

    }

    public function __construct() {

    }

    public function addHooks() {


        if(EventsWoo()->isEnabled()) {

            // use for fb server only because ajax request cause bugs in woo


            if ( PYS()->getOption('woo_add_to_cart_on_button_click')
                && isEventEnabled('woo_add_to_cart_enabled')
            )
            {
                if(PYS()->getOption('woo_add_to_cart_catch_method') == "add_cart_hook") {
                    add_action( 'wp_footer', array( __CLASS__, 'addDivForAjaxPixelEvent')  );
                    add_action( 'woocommerce_add_to_cart',array(__CLASS__, 'trackWooAddToCartEvent'),40, 6);
                    if (wp_doing_ajax()) {
                        add_filter('woocommerce_add_to_cart_fragments', array(__CLASS__, 'addPixelCodeToAddToCartFragment'));
                    } else {
                        add_action("wp_footer",array(__CLASS__, 'printEvent'));
                    }
                } else {
                    add_action( 'woocommerce_after_add_to_cart_button', 'PixelYourSite\EventsManager::setupWooSingleProductData' );
                }


            }
        }


    }


    static function trackWooAddToCartEvent($cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data) {

        if(isset($cart_item_data['woosb_parent_id'])) return; // fix for WPC Product Bundles for WooCommerce (Premium) product

        $is_ajax_request = wp_doing_ajax();
        if( isset( $_REQUEST['action'] ) && $_REQUEST['action'] === 'yith_wacp_add_item_cart') {
            $is_ajax_request = true;
        }

        $standardParams = getStandardParams( $product_id );

        PYS()->getLog()->debug('trackWooAddToCartEvent is_hook_request '.$is_ajax_request);
        $dataList = [];
        // Generate ONE shared eventID for the entire add-to-cart action so that
        // all pixels receive the same ID for server-side deduplication.
        $sharedEventId = EventIdGenerator::guidv4();
        foreach ( PYS()->getRegisteredPixels() as $pixel ) {

			if ( !Consent()->checkConsent( $pixel->getSlug() ) ) {
				continue;
			}

            if( !empty($variation_id)
                && $variation_id > 0
                && (($pixel->getSlug() === 'ga' && !GATags()->getOption( 'woo_variable_as_simple')) ||
                    ($pixel->getSlug() === "facebook" && Facebook\Helpers\isDefaultWooContentIdLogic() && !Facebook()->getOption( 'woo_variable_as_simple') ) ||
                    (!in_array($pixel->getSlug(), ['ga', 'facebook']) && !$pixel->getOption( 'woo_variable_as_simple' ))
                )
            ) {
                $_product_id = $variation_id;
            } else {
                $_product_id = $product_id;
            }


            $event = new SingleEvent('woo_add_to_cart_on_button_click',EventTypes::$STATIC,'woo');
            $event->args = ['productId' => $_product_id,'quantity' => $quantity];
            $event->addPayload(['eventID' => $sharedEventId]);
            $events = $pixel->generateEvents( $event );

            if ( empty($events) ) {
                continue; // event is disabled or not supported for the pixel
            }
            $event = $events[0];

            // add standard params
	        $slug = $pixel->getSlug();
	        if( $slug !== "reddit" ) {
		        $event->addParams($standardParams);
	        }

            // prepare event data
            $eventData = $event->getData();
            $eventData = EventsManager::filterEventParams($eventData,"woo",['event_id'=>$event->getId(),'pixel'=>$pixel->getSlug()]);

            $dataList[$pixel->getSlug()] = $eventData;
            if(!PYS()->is_user_agent_bot()){
                if($pixel->getSlug() === "facebook" && Facebook()->isServerApiEnabled()) {
                    FacebookServer()->sendEventsNow([$event]);
                }

                if($pixel->getSlug() === "pinterest" && Pinterest()->isServerApiEnabled()) {
                    PinterestServer()->sendEventsNow(array($event));
                }
            }

        }
        AjaxHookEventManager::addPendingEvent("woo_add_to_cart_on_button_click",$dataList);
    }

    public static function printEvent() {
        $pixelsEventData = self::getPendingEvent("woo_add_to_cart_on_button_click",true);
        if( !is_null($pixelsEventData) ) {
            PYS()->getLog()->debug('trackWooAddToCartEvent printEvent is footer');
            echo "<div id='pys_late_event' style='display:none' dir='".json_encode($pixelsEventData,JSON_HEX_APOS)."'></div>";
        }
    }

    public  static function addDivForAjaxPixelEvent(){

        echo self::getDivForAjaxPixelEvent();
        ?>
        <script>
            var node = document.getElementsByClassName('woocommerce-message')[0];
            if(node && document.getElementById('pys_late_event')) {
                var messageText = node.textContent.trim();
                if(!messageText) {
                    node.style.display = 'none';
                }
            }
        </script>
        <?php
    }

    public  static function getDivForAjaxPixelEvent($content = ''){
        return "<div id='".self::$DIV_ID_FOR_AJAX_EVENTS."'>" . $content . "</div>";
    }

    public static function addPixelCodeToAddToCarMessage($message, $products, $show_qty) {
        $pixelsEventData = self::getPendingEvent("woo_add_to_cart_on_button_click",true);
        if( !is_null($pixelsEventData) ){
            $message .= "<div id='pys_late_event' dir='".json_encode($pixelsEventData,JSON_HEX_APOS)."'></div>";
        }
        return $message;
    }

    public static function addPixelCodeToAddToCartFragment($fragments) {


        $pixelsEventData = self::getPendingEvent("woo_add_to_cart_on_button_click",true);
        if( !is_null($pixelsEventData) ){
            PYS()->getLog()->debug('addPixelCodeToAddToCartFragment send data with fragment');
            $pixel_code = self::generatePixelCode($pixelsEventData);
            $fragments['#'.self::$DIV_ID_FOR_AJAX_EVENTS] =
                self::getDivForAjaxPixelEvent($pixel_code);
        }

        return $fragments;
    }

    public static function generatePixelCode($pixelsEventData){

        ob_start();
        //$cartHashKey = apply_filters( 'woocommerce_cart_hash_key', 'wc_cart_hash_' . md5( get_current_blog_id() . '_' . get_site_url( get_current_blog_id(), '/' ) . get_template() ) );
        ?>
        <script>
            function pys_getCookie(name) {
                var v = document.cookie.match('(^|;) ?' + name + '=([^;]*)(;|$)');
                return v ? v[2] : null;
            }
            function pys_setCookie(name, value, days) {
                var d = new Date;
                d.setTime(d.getTime() + 24*60*60*1000*days);
                document.cookie = name + "=" + value + ";path=/;expires=" + d.toGMTString();
            }
            var name = 'pysAddToCartFragmentId';
            var cartHash = "<?=WC()->cart->get_cart_hash()?>";

            if(pys_getCookie(name) != cartHash) { // prevent re send event if user update page
                <?php
                // Extract the shared eventID and unique e_id keys from PHP event data (set once
                // in trackWooAddToCartEvent before the pixel loop, so all pixels carry the same UUID).
                $sharedEventId = '';
                $uniqueEIds    = [];
                foreach ($pixelsEventData as $slug => $eventData) {
                    if (empty($sharedEventId) && !empty($eventData['eventID'])) {
                        $sharedEventId = $eventData['eventID'];
                    }
                    $eId = !empty($eventData['custom_event_post_id'])
                            ? $eventData['custom_event_post_id']
                            : ($eventData['e_id'] ?? '');
                    if (!empty($eId) && !in_array($eId, $uniqueEIds, true)) {
                        $uniqueEIds[] = $eId;
                    }
                }
                ?>
                // Use the PHP-generated shared eventID; fall back to a JS token if absent.
                var pys_action_event_id = '<?= esc_js($sharedEventId) ?>' || pys_generate_token();

                <?php if (!empty($uniqueEIds)) : ?>
                // Sync the uniqueId cache once per event type so generateUniqueId()
                // returns the same fresh ID even when ajaxForServerStaticEvent=true.
                if (window.pys && window.pys.setEventUniqueId) {
                    <?php foreach ($uniqueEIds as $eId) : ?>
                    window.pys.setEventUniqueId('<?= esc_js($eId) ?>', pys_action_event_id);
                    <?php endforeach; ?>
                }
                <?php endif; ?>

                <?php foreach ($pixelsEventData as $slug => $eventData) : ?>
                    var pixel = getPixelBySlag('<?= $slug ?>');
                    var event = <?= json_encode($eventData) ?>;
                    event.eventID = pys_action_event_id;
                    pixel.fireEvent(event.name, event);
                <?php endforeach; ?>
                pys_setCookie(name,cartHash,90)
            }
        </script>
        <?php

        $code = ob_get_clean();
        return $code;
    }


}