<?php

declare(strict_types=1);

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace Meta\Conversion\Block\Pixel;

use Magento\Framework\Escaper;
use Meta\Conversion\Helper\AAMFieldsExtractorHelper;
use Meta\BusinessExtension\Helper\FBEHelper;
use Meta\Conversion\Helper\MagentoDataHelper;
use Meta\BusinessExtension\Model\System\Config as SystemConfig;
use Magento\Framework\View\Element\Template\Context;
use Magento\Customer\Model\Session as CustomerSession;
use Magento\Checkout\Model\Session as CheckoutSession;

/**
 * @api
 */
class Head extends Common
{
    /**
     * @var AAMFieldsExtractorHelper
     */
    private $aamFieldsExtractorHelper;

    /**
     * @var CustomerSession
     */
    private $customerSession;

    /**
     * Head constructor
     *
     * @param Context $context
     * @param FBEHelper $fbeHelper
     * @param MagentoDataHelper $magentoDataHelper
     * @param SystemConfig $systemConfig
     * @param Escaper $escaper
     * @param CheckoutSession $checkoutSession
     * @param AAMFieldsExtractorHelper $aamFieldsExtractorHelper
     * @param CustomerSession $customerSession
     * @param array $data
     */
    public function __construct(
        Context $context,
        FBEHelper $fbeHelper,
        MagentoDataHelper $magentoDataHelper,
        SystemConfig $systemConfig,
        Escaper $escaper,
        CheckoutSession $checkoutSession,
        AAMFieldsExtractorHelper $aamFieldsExtractorHelper,
        CustomerSession $customerSession,
        array $data = []
    ) {
        parent::__construct(
            $context,
            $fbeHelper,
            $magentoDataHelper,
            $systemConfig,
            $escaper,
            $checkoutSession,
            $data
        );
        $this->aamFieldsExtractorHelper = $aamFieldsExtractorHelper;
        $this->customerSession = $customerSession;
    }

    /**
     * Returns the user data that will be added in the pixel init code
     *
     * @return string
     */
    public function getPixelInitCode()
    {
        $userDataArray = $this->aamFieldsExtractorHelper->getNormalizedUserData($this->getCustomer());

        if ($userDataArray) {
            return json_encode(array_filter($userDataArray), JSON_PRETTY_PRINT | JSON_FORCE_OBJECT);
        }
        return '{}';
    }

    /**
     * Create JS code with the data processing options if required
     * To learn about these options in Meta Pixel, read:
     * https://developers.facebook.com/docs/marketing-apis/data-processing-options
     *
     * @return string
     */
    public function getDataProcessingOptionsJSCode()
    {
        return '';
    }

    /**
     * Create the data processing options passed in the Pixel image tag
     * Read about this options in:
     * https://developers.facebook.com/docs/marketing-apis/data-processing-options
     *
     * @return string
     */
    public function getDataProcessingOptionsImgTag()
    {
        return '';
    }

    /**
     * Get logged in customer
     *
     * @return \Magento\Customer\Model\Customer|null
     */
    public function getCustomer()
    {
        if (!$this->customerSession->isLoggedIn()) {
            return null;
        }

        return $this->customerSession->getCustomer();
    }

    /**
     * Get Event name
     *
     * @return string
     */
    public function getEventToObserveName()
    {
        return 'facebook_businessextension_ssapi_page_view';
    }
}