<?php

/**
 * Helper trait for context.
 *
 * @package WooCommerce\PayPalCommerce\Button\Helper
 */
declare (strict_types=1);
namespace WooCommerce\PayPalCommerce\Button\Helper;

use WooCommerce\PayPalCommerce\ApiClient\Entity\OrderStatus;
trait ContextTrait
{
    /**
     * Initializes context preconditions like is_cart() and is_checkout().
     *
     * @return void
     */
    protected function init_context(): void
    {
        if (!apply_filters('woocommerce_paypal_payments_block_classic_compat', \true)) {
            return;
        }
        /**
         * Activate is_checkout() on woocommerce/classic-shortcode checkout blocks.
         *
         * @psalm-suppress MissingClosureParamType
         */
        add_filter('woocommerce_is_checkout', function ($is_checkout) {
            if ($is_checkout) {
                return $is_checkout;
            }
            if (has_block('woocommerce/classic-shortcode')) {
                $classic_block = $this->find_classic_shortcode_block();
                $type = $classic_block['attrs']['shortcode'] ?? '';
                return $type === 'checkout';
            }
            return $is_checkout;
        });
        // Activate is_cart() on woocommerce/classic-shortcode cart blocks.
        if (!is_cart() && is_callable('wc_maybe_define_constant')) {
            if (has_block('woocommerce/classic-shortcode')) {
                $classic_block = $this->find_classic_shortcode_block();
                $type = $classic_block['attrs']['shortcode'] ?? '';
                if ($type !== 'checkout') {
                    // There is no 'cart' type, the attribute is just missing.
                    wc_maybe_define_constant('WOOCOMMERCE_CART', \true);
                }
            }
        }
    }
    /**
     * Returns the parsed data of the classic shortcode block, or null if missing on the current page.
     * Slower than has_block( 'woocommerce/classic-shortcode' )
     *
     * @return array<string, mixed>|null
     */
    protected function find_classic_shortcode_block(): ?array
    {
        $post = get_the_content();
        if (!$post) {
            return null;
        }
        $blocks = parse_blocks($post);
        foreach ($blocks as $block) {
            if ($block['blockName'] === 'woocommerce/classic-shortcode') {
                return $block;
            }
        }
        return null;
    }
    /**
     * Checks WC is_checkout() + WC checkout ajax requests.
     */
    private function is_checkout(): bool
    {
        if (is_checkout()) {
            return \true;
        }
        if ($this->is_checkout_ajax()) {
            return \true;
        }
        return \false;
    }
    /**
     * Checks if performing the WC checkout ajax requests.
     */
    private function is_checkout_ajax(): bool
    {
        /**
         * The filter returning whether to detect WC checkout ajax requests.
         */
        if (!apply_filters('ppcp_check_ajax_checkout', \true)) {
            return \false;
        }
        $wc_ajax = $this->wc_ajax_endpoint_name();
        return in_array($wc_ajax, array('update_order_review'), \true);
    }
    /**
     * Checks WC is_cart() + WC cart ajax requests.
     */
    private function is_cart(): bool
    {
        if (is_cart()) {
            return \true;
        }
        if ($this->is_cart_ajax()) {
            return \true;
        }
        return \false;
    }
    /**
     * Checks if performing the WC cart ajax requests.
     */
    private function is_cart_ajax(): bool
    {
        /**
         * The filter returning whether to detect WC checkout ajax requests.
         */
        if (!apply_filters('ppcp_check_ajax_cart', \true)) {
            return \false;
        }
        $wc_ajax = $this->wc_ajax_endpoint_name();
        return in_array($wc_ajax, array('update_shipping_method'), \true);
    }
    /**
     * Returns the current WC ajax endpoint name or an empty string if not in ajax.
     */
    private function wc_ajax_endpoint_name(): string
    {
        // phpcs:ignore WordPress.Security
        $wc_ajax = $_GET['wc-ajax'] ?? '';
        if (!is_string($wc_ajax)) {
            return '';
        }
        return $wc_ajax;
    }
    /**
     * The current context.
     *
     * @return string
     */
    protected function context(): string
    {
        // Default context.
        $context = 'mini-cart';
        switch (\true) {
            case $this->is_cart_ajax():
                $context = 'cart';
                break;
            case $this->is_checkout_ajax() && !$this->is_paypal_continuation():
                $context = 'checkout';
                break;
            case is_product() || wc_post_content_has_shortcode('product_page'):
                // Do this check here instead of reordering outside conditions.
                // In order to have more control over the context.
                if ($this->is_checkout() && !$this->is_paypal_continuation()) {
                    $context = 'checkout';
                } else {
                    $context = 'product';
                }
                break;
            // has_block may not work if called too early, such as during the block registration.
            case has_block('woocommerce/cart'):
                $context = 'cart-block';
                break;
            case $this->is_cart():
                $context = 'cart';
                break;
            case is_checkout_pay_page():
                $context = 'pay-now';
                break;
            case has_block('woocommerce/checkout'):
                $context = 'checkout-block';
                break;
            case $this->is_checkout() && !$this->is_paypal_continuation():
                $context = 'checkout';
                break;
            case $this->is_add_payment_method_page():
                $context = 'add-payment-method';
                break;
            case $this->is_block_editor():
                $context = 'block-editor';
                break;
        }
        return apply_filters('woocommerce_paypal_payments_context', $context);
    }
    /**
     * The current location.
     *
     * @return string
     */
    protected function location(): string
    {
        $context = $this->context();
        if ($context !== 'mini-cart') {
            return $context;
        }
        if (is_shop() || is_product_category()) {
            return 'shop';
        }
        if (is_front_page()) {
            return 'home';
        }
        return '';
    }
    /**
     * Checks if PayPal payment was already initiated (on the product or cart pages).
     *
     * @return bool
     */
    private function is_paypal_continuation(): bool
    {
        /**
         * Cannot guarantee that initialized in all places where this trait is used,
         * the Psalm checks seem to work weird and sometimes ignore missing property.
         *
         * @psalm-suppress RedundantPropertyInitializationCheck
         */
        if (!isset($this->session_handler)) {
            return \false;
        }
        /**
         * Property is already defined in trait consumers.
         *
         * @psalm-suppress UndefinedThisPropertyFetch
         */
        $order = $this->session_handler->order();
        if (!$order) {
            return \false;
        }
        if (!$order->status()->is(OrderStatus::APPROVED) && !$order->status()->is(OrderStatus::COMPLETED)) {
            return \false;
        }
        $source = $order->payment_source();
        if ($source && $source->name() === 'card') {
            return \false;
            // Ignore for DCC.
        }
        if ('card' === $this->session_handler->funding_source()) {
            return \false;
            // Ignore for card buttons.
        }
        return \true;
    }
    /**
     * Checks whether current page is Add payment method.
     *
     * @return bool
     */
    private function is_add_payment_method_page(): bool
    {
        /**
         * Needed for WordPress `query_vars`.
         *
         * @psalm-suppress InvalidGlobal
         */
        global $wp;
        $page_id = wc_get_page_id('myaccount');
        return $page_id && is_page($page_id) && isset($wp->query_vars['add-payment-method']);
    }
    /**
     * Checks whether this user is changing the payment method for a subscription.
     *
     * @return bool
     */
    private function is_subscription_change_payment_method_page(): bool
    {
        // phpcs:disable WordPress.Security.NonceVerification
        if (isset($_GET['change_payment_method'])) {
            return wcs_is_subscription(wc_clean(wp_unslash($_GET['change_payment_method'])));
        }
        return \false;
    }
    /**
     * Checks if it is the block editor page.
     */
    protected function is_block_editor(): bool
    {
        if (!function_exists('get_current_screen')) {
            return \false;
        }
        $screen = get_current_screen();
        return $screen && $screen->is_block_editor();
    }
    /**
     * Checks if is WooCommerce Settings Payments tab screen (/wp-admin/admin.php?page=wc-settings&tab=checkout).
     *
     * @return bool
     */
    protected function is_wc_settings_payments_tab(): bool
    {
        // phpcs:disable WordPress.Security.NonceVerification
        if (!is_admin() || isset($_GET['section'])) {
            return \false;
        }
        $page = wc_clean(wp_unslash($_GET['page'] ?? ''));
        $tab = wc_clean(wp_unslash($_GET['tab'] ?? ''));
        // phpcs:enable WordPress.Security.NonceVerification
        return $page === 'wc-settings' && $tab === 'checkout';
    }
}
