<?php
/**
 * Critical CSS Options page.
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

class autoptimizeCriticalCSSSettings {
    /**
     * Options.
     *
     * @var bool
     */
    private $settings_screen_do_remote_http = true;

    public function __construct()
    {
        $this->settings_screen_do_remote_http = apply_filters( 'autoptimize_settingsscreen_remotehttp', $this->settings_screen_do_remote_http );
        $this->run();
    }

    protected function enabled()
    {
        return apply_filters( 'autoptimize_filter_show_criticalcss_tabs', true );
    }

    public function run()
    {
        if ( $this->enabled() ) {
            add_filter( 'autoptimize_filter_settingsscreen_tabs', array( $this, 'add_critcss_tabs' ), 10, 1 );
            add_action( 'admin_enqueue_scripts', array( $this, 'admin_assets' ) );

            if ( $this->is_multisite_network_admin() && autoptimizeOptionWrapper::is_ao_active_for_network() ) {
                add_action( 'network_admin_menu', array( $this, 'add_critcss_admin_menu' ) );
            } else {
                add_action( 'admin_menu', array( $this, 'add_critcss_admin_menu' ) );
            }

            $criticalcss_ajax = new autoptimizeCriticalCSSSettingsAjax();
        }
    }

    public function add_critcss_tabs( $in )
    {
        $in = array_merge( $in, array( 'ao_critcss' => '⚡ ' . __( 'Critical CSS', 'autoptimize' ) ) );

        return $in;
    }

    public function add_critcss_admin_menu()
    {
        // Register settings.
        register_setting( 'ao_ccss_options_group', 'autoptimize_css_defer_inline' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_rules' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_additional' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_queue' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_viewport' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_finclude' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_rtimelimit' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_noptimize' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_debug' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_key' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_keyst' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_loggedin' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_forcepath' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_deferjquery' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_domain' );
        register_setting( 'ao_ccss_options_group', 'autoptimize_ccss_unloadccss' );

        // And add submenu-page.
        add_submenu_page( null, 'Critical CSS', 'Critical CSS', 'manage_options', 'ao_critcss', array( $this, 'ao_criticalcsssettings_page' ) );
    }

    public function admin_assets( $hook ) {
        // Return if plugin is not hooked.
        if ( 'settings_page_ao_critcss' != $hook && 'admin_page_ao_critcss' != $hook ) {
            return;
        }

        // Stylesheets to add.
        wp_enqueue_style( 'wp-jquery-ui-dialog' );
        wp_enqueue_style( 'ao-tablesorter', plugins_url( 'critcss-inc/css/ao-tablesorter/style.css', __FILE__ ) );
        wp_enqueue_style( 'ao-ccss-admin-css', plugins_url( 'critcss-inc/css/admin_styles.css', __FILE__ ) );

        // Scripts to add.
        wp_enqueue_script( 'jquery-ui-dialog', array( 'jquery' ) );
        wp_enqueue_script( 'md5', plugins_url( 'critcss-inc/js/md5.min.js', __FILE__ ), null, null, true );
        wp_enqueue_script( 'tablesorter', plugins_url( 'critcss-inc/js/jquery.tablesorter.min.js', __FILE__ ), array( 'jquery' ), null, true );
        wp_enqueue_script( 'ao-ccss-admin-license', plugins_url( 'critcss-inc/js/admin_settings.js', __FILE__ ), array( 'jquery' ), null, true );
    }

    public function ao_criticalcsssettings_page()
    {
        // these are not OO yet, simply require for now.
        require_once( 'critcss-inc/admin_settings_rules.php' );
        require_once( 'critcss-inc/admin_settings_queue.php' );
        require_once( 'critcss-inc/admin_settings_key.php' );
        require_once( 'critcss-inc/admin_settings_adv.php' );
        require_once( 'critcss-inc/admin_settings_explain.php' );

        // fetch all options at once and populate them individually explicitely as globals.
        $all_options = autoptimizeCriticalCSSBase::fetch_options();
        foreach ( $all_options as $_option => $_value ) {
            global ${$_option};
            ${$_option} = $_value;
        }
        ?>
        <script>document.title = "Autoptimize: <?php _e( 'Critical CSS', 'autoptimize' ); ?> " + document.title;</script>
        <div class="wrap">
            <div id="autoptimize_main">
                <div id="ao_title_and_button">
                    <h1><?php _e( 'Autoptimize Settings', 'autoptimize' ); ?></h1>
                </div>

                <?php
                // Print AO settings tabs.
                echo autoptimizeConfig::ao_admin_tabs();

                // Make sure dir to write ao_ccss exists and is writable.
                if ( ! is_dir( AO_CCSS_DIR ) ) {
                    $mkdirresp = @mkdir( AO_CCSS_DIR, 0775, true ); // @codingStandardsIgnoreLine
                } else {
                    $mkdirresp = true;
                }

                // Make sure our index.html is there.
                if ( ! is_file( AO_CCSS_DIR . 'index.html' ) ) {
                    $fileresp = file_put_contents( AO_CCSS_DIR . 'index.html', '<html><head><meta name="robots" content="noindex, nofollow"></head><body>Generated by <a href="http://wordpress.org/extend/plugins/autoptimize/" rel="nofollow">Autoptimize</a></body></html>' );
                } else {
                    $fileresp = true;
                }

                // Warn if we could not create those files.
                if ( ( ! $mkdirresp ) || ( ! $fileresp ) ) {
                    ?>
                    <div class="notice-error notice"><p>
                    <?php
                    _e( 'Could not create the required directory. Make sure the webserver can write to the wp-content directory.', 'autoptimize' );
                    ?>
                    </p></div>
                    <?php
                }

                // Check for "inline & defer CSS" being active in Autoptimize.
                if ( ! empty( $ao_ccss_key ) && ! $ao_css_defer ) {
                    if ( empty( $ao_ccss_keyst ) ) {
                        // no keystate so likely in activation-process of CCSS, let's enable "inline & defer CSS" immediately to make things easier!
                        autoptimizeOptionWrapper::update_option( 'autoptimize_css_defer', 'on' );
                        ?>
                        <div class="notice-info notice"><p>
                        <?php
                        _e( "The \"Inline and Defer CSS\" option was activated to allow critical CSS to be used.", 'autoptimize' );
                        ?>
                        </p></div>
                        <?php
                    } else {
                        // we have keystate, so "inline & defer CSS" was probably disable for troubleshooting, warn but let users continue.
                        ?>
                        <div class="notice-warning notice"><p>
                        <?php
                        _e( "Oops! Please <strong>activate the \"Inline and Defer CSS\" option</strong> on Autoptimize's main settings page to ensure critical CSS is used on the front-end.", 'autoptimize' );
                        ?>
                        </p></div>
                        <?php
                    }
                }

                // check if WordPress cron is disabled and warn if so.
                if ( ! empty( $ao_ccss_key ) && defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON && PAnD::is_admin_notice_active( 'i-know-about-disable-cron-forever' ) ) {
                    ?>
                    <div data-dismissible="i-know-about-disable-cron-forever" class="notice-warning notice is-dismissible"><p>
                    <?php
                    _e( 'WordPress cron (for task scheduling) seems to be disabled. Have a look at <a href="https://wordpress.org/plugins/autoptimize-criticalcss/faq/" target="_blank">the FAQ</a> or the info in the Job Queue instructions if all jobs remain in "N" status and no rules are created.', 'autoptimize' );
                    ?>
                    </p></div>
                    <?php
                }

                // warn if it looks as though the queue processing job looks isn't running
                // but store result in transient as to not to have to go through 2 arrays each and every time.
                $_warn_cron = get_transient( 'ao_ccss_cronwarning' );
                if ( ! empty( $ao_ccss_key ) && false === $_warn_cron ) {
                    $_jobs_all_new         = true;
                    $_oldest_job_timestamp = microtime( true ); // now.
                    $_jobs_too_old         = true;

                    // go over queue array.
                    if ( empty( $ao_ccss_queue ) ) {
                        // no jobs, then no warning.
                        $_jobs_all_new = false;
                    } else {
                        foreach ( $ao_ccss_queue as $job ) {
                            if ( $job['jctime'] < $_oldest_job_timestamp ) {
                                // we need to catch the oldest job's timestamp.
                                $_oldest_job_timestamp = $job['jctime'];
                            }

                            if ( 'NEW' !== $job['jqstat'] && 'firstrun' !== $job['ljid'] ) {
                                // we have a non-"NEW" job which is not our pending firstrun job either, break the loop.
                                $_jobs_all_new = false;
                                break;
                            }
                        }
                    }

                    // is the oldest job too old (4h)?
                    if ( $_oldest_job_timestamp > microtime( true ) - 60 * 60 * 4 ) {
                        $_jobs_too_old = false;
                    }

                    if ( $_jobs_all_new && ! $this->ao_ccss_has_autorules() && $_jobs_too_old ) {
                        $_warn_cron            = 'on';
                        $_transient_multiplier = 1; // store for 1 hour.
                    } else {
                        $_warn_cron            = 'off';
                        $_transient_multiplier = 4; // store for 4 hours.
                    }
                    // and set transient.
                    set_transient( 'ao_ccss_cronwarning', $_warn_cron, $_transient_multiplier * HOUR_IN_SECONDS );
                }

                if ( ! empty( $ao_ccss_key ) && 'on' == $_warn_cron && PAnD::is_admin_notice_active( 'i-know-about-cron-1' ) ) {
                    ?>
                    <div data-dismissible="i-know-about-cron-1" class="notice-warning notice is-dismissible"><p>
                    <?php
                    _e( 'It looks like there might be a problem with WordPress cron (task scheduling). Have a look at <a href="https://wordpress.org/plugins/autoptimize-criticalcss/faq/" target="_blank">the FAQ</a> or the info in the Job Queue instructions if all jobs remain in "N" status and no rules are created.', 'autoptimize' );
                    ?>
                    </p></div>
                    <?php
                } elseif ( ! empty( $ao_ccss_key ) && '2' == $ao_ccss_keyst && 'on' != $_warn_cron && ! $this->ao_ccss_has_autorules() ) {
                    ?>
                    <div class="notice-success notice"><p>
                    <?php
                    _e( 'Great, Autoptimize will now automatically start creating new critical CSS rules, you should see those appearing below in the next couple of hours.', 'autoptimize' );
                    echo ' ';
                    _e( 'In the meantime you might want to <strong>edit default rule CSS now</strong>, to avoid all CSS being inlined when no (applicable) rules are found.', 'autoptimize' );
                    ?>
                    </p></div>
                    <?php
                }

                // warn if service is down.
                if ( ! empty( $ao_ccss_key ) && ! empty( $ao_ccss_servicestatus ) && is_array( $ao_ccss_servicestatus ) && 'down' === $ao_ccss_servicestatus['critcss']['status'] ) {
                    ?>
                    <div class="notice-warning notice"><p>
                    <?php
                    _e( 'The critical CSS service has been reported to be down. Although no new rules will be created for now, this does not prevent existing rules from being applied.', 'autoptimize' );
                    ?>
                    </p></div>
                    <?php
                }

                // warn if too many rules (based on length of ao_ccss_rules option) as that might cause issues at e.g. wpengine
                // see https://wpengine.com/support/database-optimization-best-practices/#Autoloaded_Data
                $_raw_rules_length = strlen( get_option( 'autoptimize_ccss_rules', '') );
                if ( $_raw_rules_length > apply_filters( 'autoptimize_ccss_rules_length_warning', 500000 ) ) {
                    ?>
                    <div class="notice-warning notice"><p>
                    <?php
                    _e( 'It looks like the amount of Critical CSS rules is very high, it is recommended to reconfigure Autoptimize (e.g. by manually creating broader rules) to ensure less rules are created.', 'autoptimize' );
                    ?>
                    </p></div>
                    <?php
                }

                // Settings Form.
                ?>
                <form id="settings" method="post" action="options.php">
                    <?php
                    settings_fields( 'ao_ccss_options_group' );

                    // Get API key status.
                    $key = autoptimizeCriticalCSSCore::ao_ccss_key_status( true );

                    if ( $this->is_multisite_network_admin() ) {
                        ?>
                        <ul id="key-panel">
                            <li class="itemDetail">
                            <?php
                                // translators: the placesholder is for a line of code in wp-config.php.
                                echo sprintf( __( '<p>Critical CSS settings cannot be set at network level as critical CSS is specific to each sub-site.</p><p>You can however provide the critical CSS API key for use by all sites by adding this your wp-config.php as %s</p>', 'autoptimize' ), '<br/><code>define(\'AUTOPTIMIZE_CRITICALCSS_API_KEY\', \'eyJhbGmorestringsherexHa7MkOQFtDFkZgLmBLe-LpcHx4\');</code>' );
                            ?>
                            </li>
                        </ul>
                        <?php
                    } else {
                        if ( 'valid' == $key['status'] ) {
                            // If key status is valid, render other panels.
                            // Render rules section.
                            ao_ccss_render_rules();
                            // Render queue section.
                            ao_ccss_render_queue();
                            // Render advanced panel.
                            ao_ccss_render_adv();
                        } else {
                            // But if key is other than valid, add hidden fields to persist settings when submitting form
                            // Show explanation of why and how to get a API key.
                            ao_ccss_render_explain();

                            // Get viewport size.
                            $viewport = autoptimizeCriticalCSSCore::ao_ccss_viewport();

                            // Add hidden fields.
                            echo "<input class='hidden' name='autoptimize_ccss_rules' value='" . $ao_ccss_rules_raw . "'>";
                            echo "<input class='hidden' name='autoptimize_ccss_queue' value='" . $ao_ccss_queue_raw . "'>";
                            echo '<input class="hidden" name="autoptimize_ccss_viewport[w]" value="' . $viewport['w'] . '">';
                            echo '<input class="hidden" name="autoptimize_ccss_viewport[h]" value="' . $viewport['h'] . '">';
                            echo '<input class="hidden" name="autoptimize_ccss_finclude" value="' . $ao_ccss_finclude . '">';
                            echo '<input class="hidden" name="autoptimize_ccss_rtimelimit" value="' . $ao_ccss_rtimelimit . '">';
                            echo '<input class="hidden" name="autoptimize_ccss_debug" value="' . $ao_ccss_debug . '">';
                            echo '<input class="hidden" name="autoptimize_ccss_noptimize" value="' . $ao_ccss_noptimize . '">';
                            echo '<input class="hidden" name="autoptimize_css_defer_inline" value="' . esc_attr( $ao_css_defer_inline ) . '">';
                            echo '<input class="hidden" name="autoptimize_ccss_loggedin" value="' . $ao_ccss_loggedin . '">';
                            echo '<input class="hidden" name="autoptimize_ccss_forcepath" value="' . $ao_ccss_forcepath . '">';
                        }
                        // Render key panel unconditionally.
                        ao_ccss_render_key( $ao_ccss_key, $key['status'], $key['stmsg'], $key['msg'], $key['color'] );
                        ?>
                        <p class="submit left">
                            <input type="submit" class="button-primary" value="<?php _e( 'Save Changes', 'autoptimize' ); ?>" />
                        </p>
                        <?php
                    }
                    ?>
                </form>
                <script>
                jQuery("form#settings").submit(function(){
                    var input = jQuery("#autoptimize_ccss_domain");
                    input.val(rot(input.val(), 13));
                });
                // rot JS from http://stackoverflow.com/a/617685/987044 .
                function rot(domainstring, itype) {
                    return domainstring.toString().replace(/[a-zA-Z]/g, function (letter) {
                        return String.fromCharCode((letter <= 'Z' ? 90 : 122) >= (letter = letter.charCodeAt(0) + itype) ? letter : letter   - 26);
                    });
                }
                </script>
                <form id="importSettingsForm"<?php if ( $this->is_multisite_network_admin() ) { echo ' class="hidden"'; } ?>>
                    <span id="exportSettings" class="button-secondary"><?php _e( 'Export Settings', 'autoptimize' ); ?></span>
                    <input class="button-secondary" id="importSettings" type="button" value="<?php _e( 'Import Settings', 'autoptimize' ); ?>" onclick="upload();return false;" />
                    <input class="button-secondary" id="settingsfile" name="settingsfile" type="file" />
                </form>
                <div id="importdialog"></div>
            </div><!-- /#autoptimize_main -->
        </div><!-- /#wrap -->
        <?php
        if ( ! $this->is_multisite_network_admin() ) {
            // Include debug panel if debug mode is enable.
            if ( $ao_ccss_debug ) {
            ?>
                <div id="debug">
                    <?php
                    // Include debug panel.
                    include( 'critcss-inc/admin_settings_debug.php' );
                    ?>
                </div><!-- /#debug -->
            <?php
            }
            echo '<script>';
            include( 'critcss-inc/admin_settings_rules.js.php' );
            include( 'critcss-inc/admin_settings_queue.js.php' );
            include( 'critcss-inc/admin_settings_impexp.js.php' );
            echo '</script>';
        }
    }

    public static function ao_ccss_has_autorules() {
        static $_has_auto_rules = null;

        if ( null === $_has_auto_rules ) {
            global $ao_ccss_rules;
            $_has_auto_rules = false;
            if ( ! empty( $ao_ccss_rules ) ) {
                foreach ( array( 'types', 'paths' ) as $_typat ) {
                    foreach ( $ao_ccss_rules[ $_typat ] as $rule ) {
                        if ( ! empty( $rule['hash'] ) ) {
                            // we have at least one AUTO job, so all is fine.
                            $_has_auto_rules = true;
                            break;
                        }
                    }
                    if ( $_has_auto_rules ) {
                        break;
                    }
                }
            }
        }

        return $_has_auto_rules;
    }

    public function is_multisite_network_admin() {
        static $_multisite_network_admin = null;

        if ( null === $_multisite_network_admin ) {
            if ( is_multisite() && is_network_admin() ) {
                $_multisite_network_admin = true;
            } else {
                $_multisite_network_admin = false;
            }
        }

        return $_multisite_network_admin;
    }
}