<?php

namespace WPaaS;

if ( ! defined( 'ABSPATH' ) ) {

	exit;

}

final class Hotfixes {

	/**
	 * Instance of the API.
	 *
	 * @var API_Interface
	 */
	private $api;

	/**
	 * Class constructor.
	 */
	public function __construct( API_Interface $api ) {

		$this->api = $api;

		/**
		 * Define the WP101 API key from the WPaaS config.
		 */
		if ( ! defined( 'GD_WP101_API_KEY' ) ) {

			define( 'GD_WP101_API_KEY', Plugin::config( 'wp101_key' ) );

		}

		/**
		 * WP Popular Posts.
		 *
		 * This makes it perform much better especially on high traffic sites.
		 */
		add_filter( 'wpp_data_sampling', '__return_true' );

		/**
		 * Limit Login Attempts.
		 */
		add_filter( 'pre_update_option_limit_login_lockouts', [ $this, 'clean_limit_login_attempts' ], PHP_INT_MAX );
		add_filter( 'pre_update_option_limit_login_retries_valid', [ $this, 'clean_limit_login_attempts' ], PHP_INT_MAX );
		add_filter( 'pre_update_option_limit_login_retries', [ $this, 'clean_limit_login_attempts' ], PHP_INT_MAX );
		add_filter( 'pre_update_option_limit_login_logged', [ $this, 'clean_limit_login_attempts' ], PHP_INT_MAX );

		/**
		 * Jetpack.
		 */
		if ( Plugin::is_staging_site() ) {

			// Prevent identity crisis from triggering on staging sites.
			add_filter( 'jetpack_has_identity_crisis', '__return_false', PHP_INT_MAX );

		}

		// Use Photon CDN for images when module is active.
		add_action( 'plugins_loaded', function () {

			if ( class_exists( 'Jetpack' ) && \Jetpack::is_module_active( 'photon' ) ) {

				add_filter( 'wpaas_cdn_file_ext', function ( $file_ext ) {

					return array_diff( $file_ext, [ 'gif', 'jpeg', 'jpg', 'png' ] );

				} );

			}

		} );

		// Hide the Jetpack updates screen nag.
		add_filter( 'option_jetpack_options', [ $this, 'remove_jetpack_nag' ], PHP_INT_MAX );

		/**
		 * Disable sslverify for remote requests on non-production environments.
		 */
		add_filter(
			'http_request_args',
			function( array $args ) {

				if ( ! Plugin::is_env( 'prod' ) ) {

					$args['sslverify'] = false;

				}

				return $args;

			},
			PHP_INT_MAX
		);

		/**
		 * Override the GEM API base URL on non-production environments.
		 */
		if ( ! Plugin::is_env( 'prod' ) ) {

			add_filter(
				'gem_api_base_url',
				function( $url ) {

					return sprintf( 'https://gem.%s-godaddy.com/', Plugin::get_env() );

				},
				PHP_INT_MAX
			);

		}

		/**
		 * WP-Cron.
		 */
		if ( defined( 'WP_CLI' ) && WP_CLI ) {

			$this->blacklist_cron_event_hooks();

		}

		$this->add_cron_restrictions();

		/**
		 * Remove the author credit from GoDaddy themes for other brands.
		 */
		if ( ! Plugin::is_gd() ) {

			add_filter( 'primer_author_credit', '__return_false' );
			add_filter( 'primer_show_site_identity_settings', '__return_false' );

		}

		/**
		 * Change the terms of service URL depending on the brand.
		 */
		$tos_urls = [
			'gd'       => 'https://www.godaddy.com/agreements/showdoc.aspx?pageid=Hosting_SA',
			'mt'       => 'https://mediatemple.net/legal/terms-of-service/',
			'reseller' => sprintf(
				'https://www.secureserver.net/agreements/showdoc.aspx?pageid=Hosting_SA&prog_id=%d',
				Plugin::reseller_id()
			),
		];

		$tos_url = Plugin::use_brand_value( $tos_urls );

		if ( $tos_url ) {

			$return_tos_url = function() use ( $tos_url ) { return $tos_url; };

			add_filter( 'stock_photos_tos_url', $return_tos_url );

		}

		/**
		 * Set default options for LLAR.
		 */
		add_action( 'plugins_loaded', function () {

			if ( ! defined( 'LLA_PLUGIN_DIR' ) ) {

				return;

			}

			if ( null === get_option( 'limit_login_gdpr', null ) ) {

				update_option( 'limit_login_gdpr', 1 );

			}

			if ( null === get_option( 'limit_login_whitelist_usernames', null ) ) {

				$user = get_users(
					[
						'role'   => 'administrator',
						'number' => 1,
					]
				);

				update_option( 'limit_login_whitelist_usernames', [ $user[0]->data->user_login ] );

			}

		} );

		/**
		 * Sucuri Scanner plugin.
		 */
		add_filter( 'sucuriscan_sitecheck_details_hosting', function () {

			$labels = [
				'gd' => __( 'GoDaddy', 'gd-system-plugin' ),
				'mt' => __( 'Media Temple', 'gd-system-plugin' ),
			];

			return Plugin::use_brand_value( $labels, __( 'Managed WordPress', 'gd-system-plugin' ) );

		} );

		/**
		 * Set default CDN URL in Autoptimize plugin settings.
		 */
		add_action( 'plugins_loaded', function () {

			if ( ! defined( 'AUTOPTIMIZE_PLUGIN_VERSION' ) ) {

				return;

			}

			add_filter( 'option_autoptimize_cdn_url', function ( $value ) {

				return ( ! $value && CDN::is_enabled( true ) && CDN::get_base_url() ) ? CDN::get_base_url() : $value;

			} );

		} );

		/**
		 * Direct PHP upgrade URL for core.
		 *
		 * See: https://core.trac.wordpress.org/changeset/44815
		 */
		add_filter( 'wp_direct_php_update_url', function ( $direct_update_url ) {

			// MT cannot change PHP.
			if ( ! Plugin::is_mt() ) {

				$direct_update_url = Plugin::account_url( 'changephp' );

			}

			return $direct_update_url;

		} );

		/**
		 * Prevent temp domain from redirecting to primary domain when debugging.
		 */
		if ( 1 === (int) filter_input( INPUT_GET, 'gddebug' ) ) {

			remove_filter( 'template_redirect', 'redirect_canonical' );

		}

		/**
		 * Filter the HMT service key before the bundled Worker is loaded.
		 */
		add_action( 'wpaas_before_bundled_plugins_loaded', function () {

			add_filter( 'option_mwp_service_key', function ( $value ) {

				return defined( 'GD_HMT_SERVICE_KEY' ) ? GD_HMT_SERVICE_KEY : $value;

			}, PHP_INT_MAX );

		} );

		/**
		 * Tell the API to refresh blog title when the blogname option changes.
		 *
		 * Note: Should not fire when changed via WP-CLI.
		 */
		add_action( 'update_option_blogname', function ( $old_value, $new_value ) {

			if ( ! Plugin::is_wp_cli() && $old_value !== $new_value ) {

				$this->api->refresh_blog_title( $new_value );

			}

		}, PHP_INT_MAX, 2 );

	}

	/**
	 * Hide the Jetpack updates screen nag.
	 *
	 * @filter option_jetpack_options
	 *
	 * @param  array $options
	 *
	 * @return array
	 */
	public function remove_jetpack_nag( $options ) {

		if ( $options && empty( $options['hide_jitm']['manage'] ) || 'hide' !== $options['hide_jitm']['manage'] ) {

			$options['hide_jitm']['manage'] = 'hide';

		}

		return $options;

	}

	/**
	 * Clean up options for Limit Login Attempts.
	 *
	 * On very active sites these can become massive
	 * arrays that turn into massive strings and break
	 * MySQL because of packet size limitations.
	 *
	 * @filter pre_update_option_limit_login_lockouts
	 * @filter pre_update_option_limit_login_retries_valid
	 * @filter pre_update_option_limit_login_retries
	 * @filter pre_update_option_limit_login_logged
	 *
	 * @param  array|null $value
	 *
	 * @return array
	 */
	public function clean_limit_login_attempts( $value ) {

		if ( is_null( $value ) ) {

			return [];

		}

		if ( count( $value ) < 250 ) {

			return $value;

		}

		$sorting_func = function( $a, $b ) {

			if ( is_array( $b ) ) {

				if ( count( $a ) === count( $b ) ) {

					return 0;

				}

				return ( count( $a ) < count( $b ) ) ? - 1 : 1;

			}

			if ( $a === $b ) {

				return 0;

			}

			return ( $a < $b ) ? -1 : 1;

		};

		uasort( $value, $sorting_func );

		return array_slice( $value, -200 );

	}

	/**
	 * Blacklist cron event hooks.
	 *
	 * Note: Should only run when using WP-CLI.
	 */
	private function blacklist_cron_event_hooks() {

		global $wpdb, $wpaas_cron_event_temp_blacklist;

		$blacklist = [
			'wp_version_check',
		];

		// Get temporary blacklist transients
		$transients = (array) $wpdb->get_results(
			"SELECT
			option_name,
			option_value
			FROM {$wpdb->options}
			WHERE option_name
			LIKE '_transient_wpaas_skip_cron_%';"
		);

		// Scrub array of key prefixes and expired transients
		foreach ( $transients as $key => $transient ) {

			$transients[ $key ]->option_name = preg_filter( '/^_transient_/', '', $transient->option_name );

			if ( false === get_transient( $transient->option_name ) ) {

				unset( $transients[ $key ] );

			}

		}

		// Store in global, used by 'cron event wpaas reset' subcommand
		$wpaas_cron_event_temp_blacklist = array_combine(
			wp_list_pluck( $transients, 'option_name', true ),
			wp_list_pluck( $transients, 'option_value', true )
		);

		// Merge temporary blacklist into core blacklist
		$blacklist = array_merge( $blacklist, array_values( $wpaas_cron_event_temp_blacklist ) );

		// Remove blacklisted events from the crons array
		add_filter(
			'option_cron',
			function( $crons ) use ( $blacklist ) {

				if ( ! $crons ) {

					return $crons;

				}

				foreach ( (array) $crons as $timestamp => $events ) {

					foreach ( (array) $events as $hook => $event ) {

						if ( in_array( $hook, $blacklist, true ) ) {

							unset( $crons[ $timestamp ][ $hook ] );

						}

					}

					if ( ! $events ) {

						unset( $crons[ $timestamp ] );

					}

				}

				return (array) $crons;

			},
			PHP_INT_MAX
		);

	}

	/**
	 * Implement WPaaS restrictions on cron events
	 *
	 * since @NEXT
	 */
	private function add_cron_restrictions() {

		/**
		 * If the wp_version_check cron was ever scheduled before
		 * we unschedule it since we are on a managed platform.
		 */
		if ( false !== wp_next_scheduled( 'wp_version_check' ) ) {

			wp_clear_scheduled_hook( 'wp_version_check' );

		}

		add_filter(
			'schedule_event',
			function ( $event ) {

				$blacklisted_hooks = [
					'wp_version_check',
					'wp_maybe_auto_update',
				];

				if ( ! isset( $event->hook ) || in_array( $event->hook, $blacklisted_hooks, true ) ) {

					return false;

				}

				return $event;

			}
		);

	}

}