<?php if ( ! defined( 'ABSPATH' ) ) exit;

final class NF_Admin_Menus_SystemStatus extends NF_Abstracts_Submenu
{
    public $parent_slug = 'ninja-forms';

    public $menu_slug = 'nf-system-status';

    public $position = 6;

    public function __construct()
    {
        parent::__construct();
    }

    public function get_page_title()
    {
        return esc_html__( 'Get Help', 'ninja-forms' );
    }

    public function get_capability()
    {
        return apply_filters( 'ninja_forms_admin_status_capabilities', $this->capability );
    }

    /**
     * Bytes of a log file read when collecting recent entries.
     *
     * The Error logs section only ever shows the most recent entries, so only
     * the tail of each file is read. Reading whole files exhausted memory and
     * crashed this page on sites with a very large debug log (issue #8149).
     */
    const LOG_READ_BYTES = 262144;

    /** Maximum number of log entries listed. */
    const LOG_ENTRY_LIMIT = 50;

    /** Untranslated default for the oversized-log notice. */
    const OVERSIZED_LOG_NOTICE = 'Note: %1$s is %2$s. Only the most recent entries are shown.';

    /**
     * Collect the recent PHP error entries shown in the Error logs section.
     *
     * @param array $logFiles Candidate log file paths.
     * @return array Log entries, most recent first.
     */
    public function readErrorLog( array $logFiles )
    {
        $errorLog = [];

        foreach ( $this->uniqueLogFiles( $logFiles ) as $logFile ) {
            $lines = preg_split( '/\R/', $this->readLogTail( $logFile ) );

            foreach ( array_reverse( $lines ) as $line ) {
                $line = rtrim( $line );

                // Skip empty lines
                if ( '' === trim( $line ) ) {
                    continue;
                }

                // Only capture warnings and fatal errors
                if ( ! preg_match( '/\[(.*?)\]\s*PHP (Warning|Error|Fatal error|Parse error):/i', $line ) ) {
                    continue;
                }

                $errorLog[] = $line;

                if ( count( $errorLog ) >= self::LOG_ENTRY_LIMIT ) {
                    return $errorLog;
                }
            }
        }

        return $errorLog;
    }

    /**
     * Describe any log file too large to be read in full.
     *
     * @param array       $logFiles Candidate log file paths.
     * @param string|null $format   Translated sprintf format; the untranslated
     *                              default is used when none is supplied.
     * @return array Human readable notices, one per oversized file.
     */
    public function describeOversizedLogs( array $logFiles, $format = null )
    {
        if ( ! is_string( $format ) || '' === $format ) {
            $format = self::OVERSIZED_LOG_NOTICE;
        }

        $notices = [];

        foreach ( $this->uniqueLogFiles( $logFiles ) as $logFile ) {
            $size = filesize( $logFile );

            if ( false === $size || $size <= self::LOG_READ_BYTES ) {
                continue;
            }

            $notices[] = sprintf( $format, $logFile, $this->formatLogSize( $size ) );
        }

        return $notices;
    }

    /**
     * Resolve the candidate log paths to readable files, without duplicates.
     *
     * Several of the candidate locations commonly resolve to the same physical
     * file, which would otherwise be read more than once.
     *
     * @param array $logFiles Candidate log file paths.
     * @return array Existing, readable, de-duplicated paths.
     */
    protected function uniqueLogFiles( array $logFiles )
    {
        $unique = [];

        foreach ( $logFiles as $logFile ) {
            if ( ! is_string( $logFile ) || '' === $logFile ) {
                continue;
            }

            if ( ! file_exists( $logFile ) || ! is_readable( $logFile ) || ! is_file( $logFile ) ) {
                continue;
            }

            $resolved = realpath( $logFile );

            if ( false === $resolved ) {
                $resolved = $logFile;
            }

            $unique[ $resolved ] = $resolved;
        }

        return array_values( $unique );
    }

    /**
     * Read the tail of a log file, never more than self::LOG_READ_BYTES.
     *
     * @param string $logFile Readable log file path.
     * @return string Trailing portion of the file.
     */
    protected function readLogTail( $logFile )
    {
        $handle = @fopen( $logFile, 'rb' );

        if ( false === $handle ) {
            return '';
        }

        $size = filesize( $logFile );

        if ( false !== $size && $size > self::LOG_READ_BYTES ) {
            fseek( $handle, - self::LOG_READ_BYTES, SEEK_END );
            // The seek lands mid-entry; drop that partial line.
            fgets( $handle );
        }

        $tail = '';

        while ( ! feof( $handle ) ) {
            $chunk = fread( $handle, 8192 );

            if ( false === $chunk ) {
                break;
            }

            $tail .= $chunk;
        }

        fclose( $handle );

        return $tail;
    }

    /**
     * Format a file size for display.
     *
     * @param int $bytes
     * @return string
     */
    protected function formatLogSize( $bytes )
    {
        return number_format( $bytes / ( 1024 * 1024 ), 1 ) . ' MB';
    }

    public function display()
    {
        /** @global wpdb $wpdb */
        global $wpdb;

        wp_enqueue_style( 'nf-admin-system-status', Ninja_Forms::$url . 'assets/css/admin-system-status.css' );
        wp_enqueue_script( 'nf-admin-system-status-script', Ninja_Forms::$url . 'assets/js/admin-system-status.js', array( 'jquery' ) );
        wp_enqueue_script( 'jBox', Ninja_Forms::$url . 'assets/js/min/jBox.min.js', array( 'jquery' ), (string) filemtime( Ninja_Forms::$dir . 'assets/js/min/jBox.min.js' ) );
        wp_enqueue_style( 'jBox', Ninja_Forms::$url . 'assets/css/jBox.css', array(), (string) filemtime( Ninja_Forms::$dir . 'assets/css/jBox.css' ) );
        wp_enqueue_style( 'nf-font-awesome', Ninja_Forms::$url . 'assets/css/font-awesome.min.css' );
        
        //PHP locale
        $locale = localeconv();

        if ( is_multisite() ) {
            $multisite = esc_html__( 'Yes', 'ninja-forms' );
        } else {
            $multisite = esc_html__( 'No', 'ninja-forms' );
         }

         //PHP version check
         $php_version = esc_html( phpversion() );
         $php_compatible = ( version_compare( $php_version, '7.4' ) >= 0 ) ? esc_html__( 'Supported', 'ninja-forms' ) : esc_html__( 'Not Supported', 'ninja-forms' );

         //TODO: Possible refactor
         foreach( $locale as $key => $val ){
             if( is_string( $val ) ){
                $data = $key . ': ' . $val . '</br>';
             }
         }

         //WP_DEBUG
         if ( defined('WP_DEBUG') && WP_DEBUG ){
             $debug = esc_html__( 'Yes', 'ninja-forms' );
         } else {
            $debug =  esc_html__( 'No', 'ninja-forms' );
         }

         //WPLANG
         if ( defined( 'WPLANG' ) && WPLANG ) {
            $lang = WPLANG;
         } elseif ( get_locale() ) {
            $lang = get_locale();
         } else {
            $lang = esc_html__( 'Default', 'ninja-forms' );
         }

        //SUHOSIN
        if ( extension_loaded( 'suhosin' ) ) {
            $suhosin =  esc_html__( 'Yes', 'ninja-forms' );
        } else {
            $suhosin =  esc_html__( 'No', 'ninja-forms' );
        }

        //mbstring
        if ( extension_loaded( 'mbstring' ) ) {
            $mbstring = esc_html__( 'Yes', 'ninja-forms' );
        } else {
            $mbstring = esc_html__( 'No', 'ninja-forms' );
        }

        //curl
        if ( extension_loaded( 'curl' ) && function_exists( 'curl_version' ) ) {
            $curl_version = curl_version();
            $curl = esc_html__( 'Version' . ' ' . $curl_version['version'], 'ninja-forms' );
        } else {
            $curl = esc_html__( 'No', 'ninja-forms' );
        }
        
        //max_input_nesting_level check for 5.2.2
        if ( version_compare( PHP_VERSION, '5.2.2', '>' ) ) {
            $max_input_nesting_level = ini_get( 'max_input_nesting_level' );
        } else {
            $max_input_nesting_level = esc_html__( 'Unknown', 'ninja-forms' );
        }
        
        //max_input_vars check for 5.3.8
        if ( version_compare( PHP_VERSION, '5.3.8', '>' ) ) {
            $max_input_vars = ini_get( 'max_input_vars' );
        } else {
            $max_input_vars = esc_html__( 'Unknown', 'ninja-forms' );
        }

        //NF Legacy Submissions check
        if ( Ninja_Forms()->get_setting('load_legacy_submissions') ) {
            $legacy_submissions = esc_html__( 'enabled', 'ninja-forms' );
        } else {
            $legacy_submissions = esc_html__( 'disabled', 'ninja-forms' );
        }

        // NF Opinionated Styles
        $opinionated_styles = Ninja_Forms()->get_setting('opinionated_styles') 
        ? Ninja_Forms()->get_setting('opinionated_styles') 
        : esc_html__( 'None', 'ninja-forms' );

        //Get theme and version information
        $current_theme = wp_get_theme();
        $current_theme_version = wp_get_theme()->get( 'Version' );
        $all_themes = wp_get_themes(); 

        // Extract the theme names
        $theme_names = array();
        foreach ($all_themes as $theme) {
            $theme_names[] = $theme->get('Name');
        }

        // Convert the array of theme names to a string
        $all_installed_themes = implode(', ', $theme_names);

        //Time Zone Check
        //TODO: May need refactored
        $default_timezone = get_option( 'timezone_string' );

        //Check for active plugins
        $active_plugins = (array) get_option( 'active_plugins', array() );

        if ( is_multisite() ) {
            $active_plugins = array_merge( $active_plugins, get_site_option( 'active_sitewide_plugins', array() ) );
        }

        $all_plugins = array();

        foreach ( $active_plugins as $plugin ) {
            $plugin_data    = @get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin );
            $dirname        = dirname( $plugin );
            $version_string = '';

            if ( ! empty( $plugin_data['Name'] ) ) {

                // link the plugin name to the plugin url if available
                $plugin_name = $plugin_data['Name'];
                if ( ! empty( $plugin_data['PluginURI'] ) ) {
                    $plugin_name = '<a href="' . esc_attr( $plugin_data[ 'PluginURI' ] ) . '" title="' . esc_html__( 'Visit plugin homepage' , 'ninja-forms' ) . '">' . $plugin_name . '</a>';
                }

                $all_plugins[] = $plugin_name . ' ' . esc_html__( 'by', 'ninja-forms' ) . ' ' . $plugin_data['Author'] . ' ' . esc_html__( 'version', 'ninja-forms' ) . ' ' . $plugin_data['Version'] . $version_string;
            }
        }

        if ( sizeof( $all_plugins ) == 0 ) {
            $site_wide_plugins = '-';
        } else {
            $site_wide_plugins = implode( ', <br/>', $all_plugins );
        }

        // Check for inactive plugins
        $inactive_plugins = get_plugins();
        $all_inactive_plugins = [];

        foreach ($inactive_plugins as $plugin_file => $plugin_data) {
            if (in_array($plugin_file, $active_plugins, true)) {
                continue;
            }

            $dirname        = dirname($plugin_file);
            $version_string = '';

            if (!empty($plugin_data['Name'])) {
                // link the plugin name to the plugin URL if available
                $plugin_name = $plugin_data['Name'];
                if (!empty($plugin_data['PluginURI'])) {
                    $plugin_name = '<a href="' . esc_attr($plugin_data['PluginURI']) . '" title="' . esc_html__('Visit plugin homepage', 'ninja-forms') . '">' . $plugin_name . '</a>';
                }

                $all_inactive_plugins[] = $plugin_name . ' ' . esc_html__('by', 'ninja-forms') . ' ' . $plugin_data['Author'] . ' ' . esc_html__('version', 'ninja-forms') . ' ' . $plugin_data['Version'] . $version_string;
            }
        }

        if (sizeof($all_inactive_plugins) == 0) {
            $site_wide_inactive_plugins = '-';
        } else {
            $site_wide_inactive_plugins = implode(', <br/>', $all_inactive_plugins);
        }

        $server_ip = '';
        if( array_key_exists( 'SERVER_ADDR', $_SERVER ) )
            $server_ip = $_SERVER[ 'SERVER_ADDR' ];
        elseif( array_key_exists( 'LOCAL_ADDR', $_SERVER ) )
            $server_ip = $_SERVER[ 'LOCAL_ADDR' ];
        $host_name = gethostbyaddr( $server_ip );

        $wp_version = get_bloginfo('version');
        $wp_compatible = ( version_compare( $wp_version, Ninja_Forms::WP_MIN_VERSION ) >= 0 ) ? esc_html__( 'Supported', 'ninja-forms' ) : esc_html__( 'Not Supported', 'ninja-forms' );

        /* 
         * Error log
         */
        // Potential log file locations
        $logFiles = [
            WP_CONTENT_DIR . '/debug.log',
            WP_CONTENT_DIR . '/../debug.log',
            WP_CONTENT_DIR . '/uploads/debug.log',
            ini_get('error_log'), // Check PHP setting for log location
        ];

        $errorLog = $this->readErrorLog( $logFiles );

        if (empty($errorLog)) {
            $errorLog[] = esc_html__( 'No errors found in log files.', 'ninja-forms' );
        }

        $oversizedLogFormat = esc_html__( 'Note: %1$s is %2$s. Only the most recent entries are shown.', 'ninja-forms' );

        foreach ( $this->describeOversizedLogs( $logFiles, $oversizedLogFormat ) as $oversizedLogNotice ) {
            $errorLog[] = $oversizedLogNotice;
        }

        //retrieve old NF error logs
        // $error_log = array();

        // $log = $wpdb->get_results( 'SELECT * FROM `' . $wpdb->prefix . 'nf3_objects` WHERE type = "log" ORDER BY created_at DESC LIMIT 10', ARRAY_A );
        
        // if ( is_array( $log ) && 0 < count( $log ) ) {
        //     foreach ( $log as $error ) {
        //         $error_object = Ninja_Forms()->form()->object( $error[ 'id' ] )->get();
        //         // Make sure we don't have a duplicate message
        //         if ( false === in_array( $error_object->get_setting( 'message' ) ,$error_log ) ) {
        //             $error_log[] = $error_object->get_setting( 'message' );
        //         }
        //     }
        // } else {
        //     $error_log[] = esc_html__( 'None Logged', 'ninja-forms' );
        // }

        $dev_mode = Ninja_Forms()->get_setting('builder_dev_mode' );

        $sql_version_variable = $wpdb->get_row("show variables like 'version'");
        if($sql_version_variable && property_exists($sql_version_variable, 'Value')){
            $sql_version_variable_value = $sql_version_variable->Value;
        } else {
            $sql_version_variable_value = 'unknown';
        }

        /* 
         * Add-ons Comm Statuses
         */
        $addonsWithCommData = [
            "Capsule CRM" => [
                'optionKey' => "nfcapsulecrm_comm_data",
                'pluginSlug' => 'ninja-forms-capsule-crm/ninja-forms-capsule-crm.php'
            ],
            "Elavon" => [
                'optionKey' => "nfelavon_support_data",
                'pluginSlug' => 'ninja-forms-elavon-payment-gateway/ninja-forms-elavon.php'
            ],
            "Insightly CRM" => [
                'optionKey' => "nfinsightlycrm_comm_data",
                'pluginSlug' => 'ninja-forms-insightly-crm/ninja-forms-insightly-crm.php'
            ],
            "Onepage CRM" => [
                'optionKey' => "nfonepagecrm_support_data",
                'pluginSlug' => 'ninja-forms-onepage-crm/ninja-forms-onepage-crm.php'
            ],
            "Pipeline Deals CRM" => [
                'optionKey' => "nfpipelinecrm_support_data",
                'pluginSlug' => 'ninja-forms-pipeline-deals-crm/ninja-forms-pipeline-crm.php'
            ],
            "Salesforce CRM" => [
                'optionKey' => "nfsalesforcecrm_comm_data",
                'pluginSlug' => 'ninja-forms-salesforce-crm/ninja-forms-salesforce-crm.php'
            ],
            "Zoho CRM" => [
                'optionKey' => "nfzohocrm_comm_data",
                'pluginSlug' => 'ninja-forms-zoho-crm/ninja-forms-zoho-crm.php'
            ]
        ];

        $addons_comm_status = [];

        foreach ($addonsWithCommData as $addon_name => $addon_data) {
            $comm_data = get_option($addon_data['optionKey']);

            // Check if the plugin is active
            if (is_plugin_active($addon_data['pluginSlug'])) {
                if ($comm_data !== false) {
                    $addons_comm_status[] = [
                        'name' => $addon_name,
                        'data' => $comm_data
                    ];
                } else {
                    $addons_comm_status[] = [
                        'name' => $addon_name,
                        'data' => "No communication data found."
                    ];
                }
            }
        }

        //Output array
        $environment = array(
            esc_html__( 'Home URL','ninja-forms' ) => home_url(),
            esc_html__( 'Site URL','ninja-forms' ) => site_url(),
            esc_html__( 'Ninja Forms Version','ninja-forms' ) => esc_html( Ninja_Forms::VERSION ),
            esc_html__( 'WP Version','ninja-forms' ) => $wp_version . ' - ' . $wp_compatible,
            esc_html__( 'WP Multisite Enabled','ninja-forms' ) => $multisite,
            esc_html__( 'WP Memory Limit','ninja-forms' ) => WP_MEMORY_LIMIT,
            esc_html__( 'WP Max Upload Size','ninja-forms' ) => size_format( wp_max_upload_size() ),
            esc_html__( 'WP Language', 'ninja-forms' ) => $lang,
            esc_html__( 'WP Default Timezone','ninja-forms' ) => $default_timezone,
            esc_html__( 'WP Debug Mode', 'ninja-forms' ) => $debug,
            esc_html__( 'MySQL Version','ninja-forms' ) => $wpdb->db_version(),
            esc_html__( 'SQL Version Variable','ninja-forms' ) => $sql_version_variable_value,
            esc_html__( 'PHP Version','ninja-forms' ) => $php_version . ' - ' . $php_compatible,
            esc_html__( 'PHP Locale','ninja-forms' ) =>  $data,
            esc_html__( 'PHP Memory Limit','ninja-forms' ) => ini_get( 'memory_limit' ),
            esc_html__( 'PHP Post Max Size','ninja-forms' ) => ini_get( 'post_max_size' ),
            esc_html__( 'Max Input Nesting Level','ninja-forms' ) => $max_input_nesting_level,
            esc_html__( 'PHP Time Limit','ninja-forms' ) => ini_get('max_execution_time'),
            esc_html__( 'PHP Max Input Vars','ninja-forms' ) => $max_input_vars,
            esc_html__( 'Web Server Info','ninja-forms' ) => esc_html( $_SERVER['SERVER_SOFTWARE'] ),
            esc_html__( 'Server IP Address', 'ninja-forms' ) => $server_ip,
            esc_html__( 'Host Name', 'ninja-forms' ) => $host_name,
            esc_html__( 'SMTP','ninja-forms' ) => ini_get('SMTP'),
            esc_html__( 'smtp_port','ninja-forms' ) => ini_get('smtp_port'),
        );
        $php_extensions = array(
            esc_html__( 'CURL Installed','ninja-forms' ) => $curl,
            esc_html__( 'mbstring Installed','ninja-forms' ) => $mbstring,
            esc_html__( 'SUHOSIN Installed','ninja-forms' ) => $suhosin,
        );
        $NF_environment = array(
            esc_html__( 'Ninja Forms DB Version', 'ninja-forms' ) => get_option( 'ninja_forms_db_version' ),
            esc_html__( 'Ninja Forms Gatekeeper', 'ninja-forms' ) => WPN_Helper::get_zuul(),
            esc_html__( 'Ninja Forms "Dev Mode"', 'ninja-forms' ) => ( $dev_mode ) ? esc_html__('Enabled') : esc_html__('Disabled'),
            esc_html__( 'Currency','ninja-forms' ) => Ninja_Forms()->get_setting('currency'),
            esc_html__( 'Date Format','ninja-forms' ) => Ninja_Forms()->get_setting( 'date_format' ),
            esc_html__( 'Opinionated Styles','ninja-forms' ) => $opinionated_styles,
            esc_html__( 'Legacy Submissions','ninja-forms' ) => $legacy_submissions,
        );

        Ninja_Forms::template( 'admin-menu-system-status.html.php', compact( 'environment', 'NF_environment', 'php_extensions', 'site_wide_plugins', 'site_wide_inactive_plugins', 'current_theme', 'current_theme_version', 'all_installed_themes', 'errorLog', 'addons_comm_status' ) );
    }
} // End Class NF_Admin_SystemStatus