<?php
/**
 * Host compatibility helpers (generic, opt-in).
 *
 * @package AgentdeskSiteOperations
 */

defined( 'ABSPATH' ) || exit;

/**
 * Behind a TLS-terminating reverse proxy, PHP may see plain HTTP. When the site
 * owner opts in with define( 'AGENTDESK_TRUST_PROXY', true ), normalise the HTTPS
 * flag from the standard forwarding headers so is_ssl() and cookie/nonce logic
 * agree. Off by default so a client cannot spoof HTTPS over plain HTTP.
 */
add_action(
	'plugins_loaded',
	function () {
		if ( ! defined( 'AGENTDESK_TRUST_PROXY' ) || ! AGENTDESK_TRUST_PROXY ) {
			return;
		}
		if ( ! empty( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) && 'https' === strtolower( sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) ) ) ) {
			$_SERVER['HTTPS'] = 'on';
		}
		if ( ! empty( $_SERVER['HTTP_X_FORWARDED_SSL'] ) && 'on' === strtolower( sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_FORWARDED_SSL'] ) ) ) ) {
			$_SERVER['HTTPS'] = 'on';
		}
	},
	0
);

/**
 * Never let a proxy/CDN cache MCP REST responses (they carry per-session data).
 */
add_filter(
	'rest_pre_serve_request',
	function ( $served, $result, $request, $server ) {
		// Only touch this plugin's own routes; never alter caching for other plugins.
		$route = ( $request instanceof WP_REST_Request ) ? (string) $request->get_route() : '';
		if ( 0 !== strpos( ltrim( $route, '/' ), AGENTDESK_REST_NAMESPACE ) ) {
			return $served;
		}

		if ( ! headers_sent() ) {
			header( 'Cache-Control: no-cache, no-store, must-revalidate, max-age=0' );
			header( 'Pragma: no-cache' );
		}
		return $served;
	},
	10,
	4
);

/**
 * WooCommerce "coming soon" mode blanks the Elementor preview iframe; exclude the
 * editor/preview requests so the canvas renders for Woo + Elementor users.
 */
add_filter(
	'woocommerce_coming_soon_exclude',
	function ( $is_excluded ) {
		if ( isset( $_GET['elementor-preview'] ) || isset( $_GET['elementor_library'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			return true;
		}
		return $is_excluded;
	},
	20
);