<?php

/**
 * Handle Embed Donation Form Route
 *
 * @package Give/Coontroller
 * @since 2.7.0
 */

namespace Give\Controller;

use Give\Form\LoadTemplate;
use Give\Form\Template;
use Give\Helpers\Form\Template as FormTemplateUtils;
use Give\Helpers\Form\Template\Utils\Frontend as FrontendFormTemplateUtils;
use Give\Helpers\Form\Utils as FormUtils;
use Give\Helpers\Frontend\ConfirmDonation;
use Give\Helpers\Frontend\Shortcode as ShortcodeUtils;
use Give\Helpers\Utils;
use Give\Session\SessionDonation\DonationAccessor;
use Give_Notices;
use WP_Post;

defined('ABSPATH') || exit;

/**
 * Form class.
 *
 * @since 2.7.0
 */
class Form
{

    /**
     * Initialize
     *
     * @since 2.7.0
     */
    public function init()
    {
        add_action('wp', [$this, 'loadTemplateOnFrontend'], 11, 0);
        add_action('admin_init', [$this, 'loadTemplateOnAjaxRequest']);
        add_action('init', [$this, 'embedFormRedirectURIHandler'], 1);
        add_action('template_redirect', [$this, 'loadReceiptView'], 1);
        add_action('give_before_single_form_summary', [$this, 'handleSingleDonationFormPage'], 0);
    }

    /**
     * Load form template on frontend.
     *
     * @since 2.7.0
     */
    public function loadTemplateOnFrontend()
    {
        if (FormUtils::isProcessingForm()) {
            $this->loadTemplate();

            add_action('template_redirect', [$this, 'loadDonationFormView'], 1);
        }
    }

    /**
     * Load receipt view.
     *
     * @since 2.7.0
     */
    public function loadReceiptView()
    {
        // Do not handle legacy donation form.
        if (FormUtils::isLegacyForm()) {
            return;
        }

        // Handle success page.
        if (FormUtils::isViewingFormReceipt() && ! FormUtils::isLegacyForm()) {
            /* @var Template $formTemplate */
            $formTemplate = Give()->templates->getTemplate();

            if (FormUtils::inIframe() || ($formTemplate->openSuccessPageInIframe && FormUtils::isProcessingForm())) {
                // Set header.
                nocache_headers();
                header('HTTP/1.1 200 OK');

                // Show donation processing template.
                if (ConfirmDonation::isConfirming()) {
                    $session = new DonationAccessor();
                    $donationId = $session->getDonationId();

                    /**
                     * Fire the action hook.
                     *
                     * If developer wants to verify payment before showing receipt then use `give_handle_donation_confirm` action hook to verify donation.
                     * Developer can access query parameters return by payment gateway. for example
                     * $session = new DonationAccessor();
                     * $session->getByKey( "postDataFor{$paymentGatewayId}" )
                     *
                     * @since 2.7.0
                     *
                     * @param int $donationId
                     */
                    do_action('give_handle_donation_confirmation', $donationId);

                    ConfirmDonation::removePostedDataFromDonationSession();

                    // Load payment processing view only if donation is in pending status.
                    if ('pending' === get_post_status($donationId)) {
                        include GIVE_PLUGIN_DIR . 'src/Views/Form/defaultFormDonationProcessing.php';
                        exit();
                    }
                }

                // Render receipt with in iframe.
                include $formTemplate->getReceiptView();
                exit();
            }

            // Render receipt on success page in iframe.
            add_filter('the_content', [$this, 'showReceiptInIframeOnSuccessPage'], 1);
        }
    }

    /**
     * Load donation form view.
     *
     * @since 2.7.0
     * @since 2.16.2 Co-locate $formTemplate with related conditional and usage.
     * @global WP_Post $post
     */
    public function loadDonationFormView()
    {
        // Handle failed donation error.
        if (FormUtils::canShowFailedDonationError()) {
            add_action('give_pre_form', [$this, 'setFailedTransactionError']);
        }

        // Handle donation form.
        if (FormUtils::isViewingForm()) {
            /* @var Template $formTemplate */
            $formTemplate = Give()->templates->getTemplate();

            // Set header.
            nocache_headers();
            header('HTTP/1.1 200 OK');

            include $formTemplate->getFormView();
            exit();
        }
    }

    /**
     * Show failed transaction error on donation form.
     *
     * @since 2.7.0
     */
    public function setFailedTransactionError()
    {
        Give_Notices::print_frontend_notice(
            Give()->templates->getTemplate(FormTemplateUtils::getActiveID())->getFailedDonationMessage(),
            true,
            'error'
        );
    }

    /**
     * Handle receipt shortcode on success page
     *
     * @since 2.7.0
     *
     * @param string $content
     *
     * @return string
     */
    public function showReceiptInIframeOnSuccessPage($content)
    {
        $receiptShortcode = ShortcodeUtils::getReceiptShortcodeFromConfirmationPage();
        $content = str_replace($receiptShortcode, give_form_shortcode([]), $content);

        return $content;
    }

    /**
     * Load form template
     *
     * @since 2.7.0
     * @return LoadTemplate
     */
    private function loadTemplate()
    {
        $templateLoader = new LoadTemplate();
        $templateLoader->init();

        return $templateLoader;
    }

    /**
     * Load form template on ajax request.
     *
     * @since 2.7.0
     */
    public function loadTemplateOnAjaxRequest()
    {
        if (FormUtils::isProcessingGiveActionOnAjax() && ! FormUtils::isLegacyForm()) {
            $this->loadTemplate();
        }
    }

    /**
     * Handle donor redirect when process donations.
     *
     * This function handle donor redirect when process donation with offsite checkout and on-site checkout.
     * Donor will immediately redirect to success page aka receipt page for on-site payment process. That means success page remain same (as set in admin settings).
     * For offsite checkout donor will redirect to embed form parent page. A query parameter will be add to url giveDonationAction=showReceipt to handle further cases.
     *
     * @since 2.7.0
     */
    public function embedFormRedirectURIHandler()
    {
        if (FormUtils::isProcessingForm()) {
            add_filter('give_get_success_page_uri', [self::class, 'editSuccessPageURI']);
            add_filter('give_get_failed_transaction_uri', [self::class, 'editFailedPageURI']);
            add_filter('give_send_back_to_checkout', [$this, 'handlePrePaymentProcessingErrorRedirect']);
            add_filter('wp_redirect', [$this, 'handleOffSiteCheckoutRedirect']);
        }
    }

    /**
     * Return current page aka embed form parent url as success page.
     *
     * @since 2.7.0
     *
     * @param string $url
     *
     * @return string
     */
    public static function editSuccessPageURI($url)
    {
        /* @var Template $template */
        $template = Give()->templates->getTemplate();

        return $template->openSuccessPageInIframe ?
            FormUtils::createSuccessPageURL(Utils::switchRequestedURL($url, FormUtils::getIframeParentURL())) :
            $url;
    }

    /**
     * Return current page aka embed form parent url as failed page.
     *
     * @since 2.7.0
     *
     * @param string $url
     *
     * @return string
     */
    public static function editFailedPageURI($url)
    {
        /* @var Template $template */
        $template = Give()->templates->getTemplate(FormTemplateUtils::getActiveID());

        return $template->openFailedPageInIframe ?
            FormUtils::createFailedPageURL(Utils::switchRequestedURL($url, FormUtils::getIframeParentURL())) :
            $url;
    }

    /**
     * Handle pre payment processing redirect.
     *
     * These redirects mainly happen when donation form data is not valid.
     *
     * @since 2.7.0
     * @since 2.9.6 Adds giveDonationFormInIframe query param to url
     *
     * @param string $redirect
     *
     * @return string
     */
    public function handlePrePaymentProcessingErrorRedirect($redirect)
    {
        $redirect = add_query_arg(
            [
                'showDonationProcessingError' => 1,
                'giveDonationFormInIframe' => 1,
            ],
            $redirect
        );

        $url = explode('?', $redirect, 2);
        $url[0] = Give()->routeForm->getURL(get_post_field('post_name', absint($_REQUEST['give-form-id'])));

        return implode('?', $url);
    }

    /**
     * Handle offsite payment checkout.
     *
     * In case of offsite checkout, this function will load a intermediate template to redirect embed parent page.
     *
     * @since 2.7.0
     *
     * @param string $location
     *
     * @return mixed
     */
    public function handleOffSiteCheckoutRedirect($location)
    {
        /* @var Template $template */
        $template = Give()->templates->getTemplate();

        // Exit if redirect is on same website.
        if (0 === strpos($location, home_url())) {
            if (FormUtils::isIframeParentSuccessPageURL($location)) {
                $location = FormUtils::getSuccessPageURL();
                $location = Utils::removeDonationAction($location);

                // Open link in window?
                if ( ! $template->openSuccessPageInIframe) {
                    $this->openLinkInWindow($location);
                }

                return $location;
            }

            if (FormUtils::isIframeParentFailedPageURL($location)) {
                $location = add_query_arg(
                    ['showFailedDonationError' => 1],
                    $template->getFailedPageURL(FrontendFormTemplateUtils::getFormId())
                );
                $location = Utils::removeDonationAction($location);

                // Open link in window?
                if ( ! $template->openFailedPageInIframe) {
                    $this->openLinkInWindow(FormUtils::getLegacyFailedPageURL());
                }

                return $location;
            }

            // Add comment here.
            if (
                ( ! $template->openSuccessPageInIframe && 0 === strpos($location, FormUtils::getSuccessPageURL())) ||
                ( ! $template->openFailedPageInIframe && 0 === strpos($location, FormUtils::getLegacyFailedPageURL()))
            ) {
                $this->openLinkInWindow($location);
            }

            return $location;
        }

        $this->openLinkInWindow($location);
    }

    /**
     * Handle link opening in window instead of iframe.
     *
     * @since 2.7.0
     *
     * @param string $location
     */
    private function openLinkInWindow($location)
    {
        include GIVE_PLUGIN_DIR . 'src/Views/Form/defaultRedirectHandlerTemplate.php';
        exit();
    }

    /**
     * Handle single donation form page.
     *
     * @since 2.7.0
     */
    public function handleSingleDonationFormPage()
    {
        // Exit if current form is legacy
        if (FormUtils::isLegacyForm()) {
            return;
        }

        // Disable sidebar.
        add_action('give_get_option_form_sidebar', [$this, 'disableLegacyDonationFormSidebar']);

        // Remove title.
        remove_action('give_single_form_summary', 'give_template_single_title', 5);

        // Remove donation form renderer.
        remove_action('give_single_form_summary', 'give_get_donation_form', 10);

        add_action('give_single_form_summary', [$this, 'renderFormOnSingleDonationFormPage'], 10);
    }

    /**
     * Return 'disabled' as donation form sidebar status.
     *
     * @since 2.7.0
     * @return string
     */
    public function disableLegacyDonationFormSidebar()
    {
        return 'disabled';
    }

    /**
     * This function handle donation form style for single donation page.
     *
     * Note: it will render style on basis on selected form template.
     *
     * @since 2.7.0
     */
    public function renderFormOnSingleDonationFormPage()
    {
        echo give_form_shortcode([]);
    }
}
