<?php
/**
 * Admin helper Functions.
 *
 * This file contains functions needed on the admin screens.
 *
 * @since      0.9.0
 * @package    RankMath
 * @subpackage RankMath\Admin
 * @author     Rank Math <support@rankmath.com>
 */

namespace RankMath\Admin;

use RankMath\KB;
use RankMath\Helper;
use RankMath\Data_Encryption;
use RankMath\Helpers\Security;
use RankMath\Helpers\Param;

defined( 'ABSPATH' ) || exit;

/**
 * Admin_Helper class.
 */
class Admin_Helper {

	/**
	 * Get .htaccess related data.
	 *
	 * @return array
	 */
	public static function get_htaccess_data() {
		if ( ! Helper::is_filesystem_direct() ) {
			return [
				'content'  => '',
				'writable' => false,
			];
		}

		$wp_filesystem = Helper::get_filesystem();
		if ( empty( $wp_filesystem ) ) {
			return;
		}

		$htaccess_file = get_home_path() . '.htaccess';
		return ! $wp_filesystem->exists( $htaccess_file ) ? false : [
			'content'  => $wp_filesystem->get_contents( $htaccess_file ),
			'writable' => $wp_filesystem->is_writable( $htaccess_file ),
		];
	}

	/**
	 * Get tooltip HTML.
	 *
	 * @param string $message Message to show in tooltip.
	 *
	 * @return string
	 */
	public static function get_tooltip( $message ) {
		return '<span class="rank-math-tooltip"><em class="dashicons-before dashicons-editor-help"></em><span>' . $message . '</span></span>';
	}

	/**
	 * Get admin view file.
	 *
	 * @param string $view View filename.
	 *
	 * @return string Complete path to view
	 */
	public static function get_view( $view ) {
		$view = sanitize_key( $view );
		$view = rank_math()->admin_dir() . "views/{$view}.php";

		if ( ! file_exists( $view ) ) {
			Helper::redirect( Helper::get_admin_url() );
			exit;
		}

		return $view;
	}

	/**
	 * Get taxonomies as choices.
	 *
	 * @param array $args (Optional) Arguments passed to filter list.
	 *
	 * @return array|bool
	 */
	public static function get_taxonomies_options( $args = [] ) {
		global $wp_taxonomies;

		$args       = wp_parse_args( $args, [ 'public' => true ] );
		$taxonomies = wp_filter_object_list( $wp_taxonomies, $args, 'and', 'label' );

		return empty( $taxonomies ) ? false : [ 'off' => esc_html__( 'None', 'seo-by-rank-math' ) ] + $taxonomies;
	}

	/**
	 * Registration data get/update.
	 *
	 * @param array|bool|null $data Array of data to save.
	 *
	 * @return array
	 */
	public static function get_registration_data( $data = null ) {
		$row  = 'rank_math_connect_data';
		$keys = [
			'username',
			'email',
			'api_key',
			'plan',
		];

		// Setter.
		if ( ! is_null( $data ) ) {
			if ( false === $data ) {
				update_option( 'rank_math_registration_skip', 1 );
				return delete_option( $row );
			}

			foreach ( $keys as $key ) {
				if ( isset( $data[ $key ] ) ) {
					$data[ $key ] = Data_Encryption::encrypt( $data[ $key ] );
				}
			}

			Helper::remove_notification( 'rank-math-site-url-mismatch' );
			update_option( 'rank_math_registration_skip', 1 );
			$connected = update_option( $row, $data );

			do_action( 'rank_math/connect/account_connected', $data );
			return $connected;
		}

		// Getter.
		$options = Helper::is_plugin_active_for_network() ? get_blog_option( get_main_site_id(), $row, false ) : get_option( $row, false );
		if ( empty( $options ) ) {
			return false;
		}

		foreach ( $keys as $key ) {
			if ( isset( $options[ $key ] ) ) {
				$options[ $key ] = Data_Encryption::decrypt( $options[ $key ] );
			}
		}

		if ( ! self::is_valid_registration( $options ) ) {
			// Delete invalid registration data.
			delete_option( $row );

			// Ask the user to reconnect.
			Helper::add_notification(
				__( 'Unable to validate Rank Math SEO registration data.', 'seo-by-rank-math' ) .
				' <a href="' . esc_url( self::get_activate_url() ) . '">' . __( 'Please try reconnecting.', 'seo-by-rank-math' ) . '</a> ' .
				sprintf(
					/* translators: KB Link */
					__( 'If the issue persists, please try the solution described in our Knowledge Base article: %s', 'seo-by-rank-math' ),
					'<a href="' . KB::get( 'unable-to-encrypt', 'Registration Data' ) . '" target="_blank">' . __( '[3. Unable to Encrypt]', 'seo-by-rank-math' ) . '</a>'
				),
				[ 'type' => 'error' ]
			);

			return false;
		}

		/**
		 * Filter whether we need to check for URL mismatch or not.
		 */
		$do_url_check = apply_filters( 'rank_math/registration/do_url_check', ! get_option( 'rank_math_siteurl_mismatch_notice_dismissed' ) );
		if ( $do_url_check && isset( $options['site_url'] ) && Helper::get_home_url() !== $options['site_url'] ) {
			$message = esc_html__( 'Seems like your site URL has changed since you connected to Rank Math.', 'seo-by-rank-math' ) . ' <a href="' . self::get_activate_url() . '">' . esc_html__( 'Click here to reconnect.', 'seo-by-rank-math' ) . '</a>';
			Helper::add_notification(
				$message,
				[
					'type' => 'warning',
					'id'   => 'rank-math-site-url-mismatch',
				]
			);
		}

		/**
		 * Ensure the site_url is returned if it is absent, as it is required for the Content AI.
		 */
		if ( empty( $options['site_url'] ) ) {
			$options['site_url'] = Helper::get_home_url();
		}

		return $options;
	}

	/**
	 * Check if registration data is valid.
	 *
	 * @param array $data Registration data.
	 *
	 * @return bool
	 */
	public static function is_valid_registration( $data ) {
		if ( empty( $data['username'] ) || empty( $data['email'] ) || empty( $data['api_key'] ) || empty( $data['plan'] ) ) {
			return false;
		}

		if ( ! filter_var( $data['email'], FILTER_VALIDATE_EMAIL ) ) {
			return false;
		}

		if ( strlen( $data['plan'] ) > 32 ) { // This can happen when the decryption fails for some reason.
			return false;
		}

		return true;
	}

	/**
	 * Get user plan.
	 */
	public static function get_user_plan() {
		$data = self::get_registration_data();

		return $data['plan'];
	}

	/**
	 * Is user plan expired.
	 *
	 * @return boolean
	 */
	public static function is_plan_expired() {
		$data = self::get_registration_data();
		if ( ! isset( $data['plan'] ) ) {
			return true;
		}

		return 'free' === $data['plan'];
	}

	/**
	 * Remove registration data and disconnect from RankMath.com.
	 */
	public static function deregister_user() {
		$registered = self::get_registration_data();
		if ( $registered && isset( $registered['username'] ) && isset( $registered['api_key'] ) ) {
			Api::get()->deactivate_site( $registered['username'], $registered['api_key'] );
			self::get_registration_data( false );

			do_action( 'rank_math/deregister_site' );
		}
	}

	/**
	 * Check if current page is media list page.
	 *
	 * @return bool
	 */
	public static function is_media_library() {
		global $pagenow;

		return 'upload.php' === $pagenow;
	}

	/**
	 * Check if current page is post list page.
	 *
	 * @return bool
	 */
	public static function is_post_list() {
		global $pagenow;

		return 'edit.php' === $pagenow;
	}

	/**
	 * Check if current page is post create/edit screen.
	 *
	 * @return bool
	 */
	public static function is_post_edit() {
		global $pagenow;
		return ! Helper::is_ux_builder() && ( 'post.php' === $pagenow || 'post-new.php' === $pagenow );
	}

	/**
	 * Check if current page is term create/edit screen.
	 *
	 * @return bool
	 */
	public static function is_term_edit() {
		global $pagenow;

		return 'term.php' === $pagenow || 'edit-tags.php' === $pagenow;
	}

	/**
	 * Check if current page is term create/term listing.
	 *
	 * @return bool
	 */
	public static function is_term_listing() {
		global $pagenow;

		return 'edit-tags.php' === $pagenow;
	}

	/**
	 * Check if current page is user create/edit screen.
	 *
	 * @return bool
	 */
	public static function is_user_edit() {
		global $pagenow;

		return 'profile.php' === $pagenow || 'user-edit.php' === $pagenow;
	}

	/**
	 * Check if current page is user or term create/edit screen.
	 *
	 * @return bool
	 */
	public static function is_term_profile_page() {
		global $pagenow;

		return self::is_term_edit() || self::is_user_edit();
	}

	/**
	 * Get product activation URL.
	 *
	 * @param string $redirect_to Redirecto url.
	 *
	 * @return string Activate URL.
	 */
	public static function get_activate_url( $redirect_to = null ) {
		if ( empty( $redirect_to ) ) {
			$redirect_to = Security::add_query_arg_raw(
				[
					'page'  => 'rank-math',
					'view'  => 'help',
					'nonce' => wp_create_nonce( 'rank_math_register_product' ),
				],
				( is_multisite() && is_plugin_active_for_network( plugin_basename( RANK_MATH_FILE ) ) ) ? network_admin_url( 'admin.php' ) : admin_url( 'admin.php' )
			);
		} else {
			$redirect_to = Security::add_query_arg_raw(
				[
					'nonce' => wp_create_nonce( 'rank_math_register_product' ),
				],
				$redirect_to
			);
		}

		$args = [
			'site' => rawurlencode( home_url() ),
			'r'    => rawurlencode( $redirect_to ),
		];

		return apply_filters(
			'rank_math/license/activate_url',
			Security::add_query_arg_raw( $args, RANK_MATH_SITE_URL . '/auth' ),
			$args
		);
	}

	/**
	 * Check if page is set as Homepage.
	 *
	 * @since 1.0.42
	 *
	 * @return boolean
	 */
	public static function is_home_page() {
		$front_page = (int) get_option( 'page_on_front' );

		if ( Helper::is_divi_frontend_editor() ) {
			$p = get_post();
			return ! empty( $p->ID ) && $p->ID === $front_page;
		}

		return $front_page && self::is_post_edit() && (int) Param::get( 'post' ) === $front_page;
	}

	/**
	 * Check if page is set as Posts Page.
	 *
	 * @since 1.0.43
	 *
	 * @return boolean
	 */
	public static function is_posts_page() {
		$posts_page = (int) get_option( 'page_for_posts' );

		return $posts_page && self::is_post_edit() && (int) Param::get( 'post' ) === $posts_page;
	}

	/**
	 * Get Trends icon <svg> element.
	 *
	 * @return string
	 */
	public static function get_trends_icon_svg() {
		return '<svg viewBox="0 0 610 610"><path d="M18.85,446,174.32,290.48l58.08,58.08L76.93,504a14.54,14.54,0,0,1-20.55,0L18.83,466.48a14.54,14.54,0,0,1,0-20.55Z" style="fill:#4285f4"/><path d="M242.65,242.66,377.59,377.6l-47.75,47.75a14.54,14.54,0,0,1-20.55,0L174.37,290.43l47.75-47.75A14.52,14.52,0,0,1,242.65,242.66Z" style="fill:#ea4335"/><polygon points="319.53 319.53 479.26 159.8 537.34 217.88 377.61 377.62 319.53 319.53" style="fill:#fabb05"/><path d="M594.26,262.73V118.61h0a16.94,16.94,0,0,0-16.94-16.94H433.2a16.94,16.94,0,0,0-12,28.92L565.34,274.71h0a16.94,16.94,0,0,0,28.92-12Z" style="fill:#34a853"/><rect width="610" height="610" style="fill:none"/></svg>';
	}

	/**
	 * Check if siteurl & home options are both valid URLs.
	 *
	 * @return boolean
	 */
	public static function is_site_url_valid() {
		return (bool) filter_var( get_option( 'siteurl' ), FILTER_VALIDATE_URL ) && (bool) filter_var( get_option( 'home' ), FILTER_VALIDATE_URL );
	}

	/**
	 * Maybe show notice about invalid siteurl.
	 */
	public static function maybe_show_invalid_siteurl_notice() {
		if ( ! self::is_site_url_valid() ) {
			?>
			<p class="notice notice-warning notice-alt notice-connect-disabled">
				<?php
				printf(
					// Translators: 1 is "WordPress Address (URL)", 2 is "Site Address (URL)", 3 is a link to the General Settings, with "WordPress General Settings" as anchor text.
					esc_html__( 'Rank Math cannot be connected because your site URL doesn\'t appear to be a valid URL. If the domain name contains special characters, please make sure to use the encoded version in the %1$s &amp; %2$s fields on the %3$s page.', 'seo-by-rank-math' ),
					'<strong>' . esc_html__( 'WordPress Address (URL)', 'seo-by-rank-math' ) . '</strong>',
					'<strong>' . esc_html__( 'Site Address (URL)', 'seo-by-rank-math' ) . '</strong>',
					'<a href="' . esc_url( admin_url( 'options-general.php' ) ) . '">' . esc_html__( 'WordPress General Settings', 'seo-by-rank-math' ) . '</a>'
				);
				?>
			</p>
			<?php
		}
	}
}
