import { ServiceNowInstance } from "../ServiceNowInstance.js";
import { SyslogRecord, SyslogAppScopeRecord, SyslogFormatOptions, SyslogTailOptions } from './SyslogRecord.js';
/**
 * SyslogReader class for querying and tailing ServiceNow syslog tables
 * Supports encoded query strings, formatted table output, and file export
 */
export declare class SyslogReader {
    private readonly SYSLOG_TABLE;
    private readonly SYSLOG_APP_SCOPE_TABLE;
    private _logger;
    private _tableAPI;
    private _processorRequest;
    private _instance;
    private _tailInterval?;
    private _lastFetchedSysId?;
    private _lastSequence?;
    private _isTailing;
    constructor(instance: ServiceNowInstance);
    /**
     * Query the syslog table with an encoded query string
     * @param encodedQuery ServiceNow encoded query string (e.g., "levelSTARTSWITHerror^ORDERBYDESCsys_created_on")
     * @param limit Maximum number of records to return (default: 100)
     * @returns Promise<SyslogRecord[]> Array of syslog records
     */
    querySyslog(encodedQuery?: string, limit?: number): Promise<SyslogRecord[]>;
    /**
     * Query the syslog_app_scope table with an encoded query string
     * @param encodedQuery ServiceNow encoded query string
     * @param limit Maximum number of records to return (default: 100)
     * @returns Promise<SyslogAppScopeRecord[]> Array of syslog_app_scope records
     */
    querySyslogAppScope(encodedQuery?: string, limit?: number): Promise<SyslogAppScopeRecord[]>;
    /**
     * Format syslog records as a table for console output
     * @param records Array of syslog records
     * @param options Formatting options
     * @returns string Formatted table as string
     */
    formatAsTable(records: (SyslogRecord | SyslogAppScopeRecord)[], options?: SyslogFormatOptions): string;
    /**
     * Build ASCII table from rows
     * @param rows Array of row data
     * @param colWidths Column widths
     * @param hasHeader Whether first row is header
     * @returns Formatted table string
     */
    private buildAsciiTable;
    /**
     * Pad string to specified width
     * @param str String to pad
     * @param width Target width
     * @returns Padded string
     */
    private padString;
    /**
     * Format and print syslog records to console
     * @param records Array of syslog records
     * @param options Formatting options
     */
    printTable(records: (SyslogRecord | SyslogAppScopeRecord)[], options?: SyslogFormatOptions): void;
    /**
     * Save syslog records to a file
     * @param records Array of syslog records
     * @param filePath Path to save the file
     * @param format Output format ('json', 'csv', 'table')
     * @param append Whether to append to existing file (default: false)
     */
    saveToFile(records: (SyslogRecord | SyslogAppScopeRecord)[], filePath: string, format?: 'json' | 'csv' | 'table', append?: boolean): Promise<void>;
    /**
     * Tail syslog in real-time (like tail -f)
     * @param tableName Table to tail ('syslog' or 'syslog_app_scope')
     * @param options Tail options including query, interval, and callbacks
     */
    startTailing(tableName?: 'syslog' | 'syslog_app_scope', options?: SyslogTailOptions): Promise<void>;
    /**
     * Tail ServiceNow logs using the ChannelAjax logtail processor
     * This is more efficient than polling the table API as it uses sequence numbers
     * @param options Tail options including interval and callbacks
     */
    startTailingWithChannelAjax(options?: Omit<SyslogTailOptions, 'query' | 'initialLimit'>): Promise<void>;
    /**
     * Fetch logs from the ChannelAjax logtail processor
     * @returns Array of log tail items
     */
    private fetchLogsFromChannelAjax;
    /**
     * Parse XML response from ChannelAjax logtail
     * @param xmlData XML string from response
     * @returns Parsed LogTailResponse
     */
    private parseLogTailXml;
    /**
     * Format a LogTailItem for console output
     * @param item Log tail item
     * @returns Formatted string
     */
    private formatLogTailItem;
    /**
     * Convert LogTailItem to SyslogRecord format
     * @param item Log tail item
     * @returns SyslogRecord
     */
    private logTailItemToSyslogRecord;
    /**
     * Save text content to a file
     * @param content Text content to save
     * @param filePath File path
     * @param append Whether to append
     */
    private saveTextToFile;
    /**
     * Stop tailing logs
     */
    stopTailing(): void;
    /**
     * Check if currently tailing
     */
    get isTailing(): boolean;
    /**
     * Format records as CSV
     * @param records Array of records
     * @returns CSV string
     */
    private formatAsCSV;
    /**
     * Format date based on format option
     * @param dateString ISO date string
     * @param format Date format option
     * @returns Formatted date string
     */
    private formatDate;
    /**
     * Get relative time string (e.g., "2 minutes ago")
     * @param date Date object
     * @returns Relative time string
     */
    private getRelativeTime;
    /**
     * Colorize log level for console output
     * @param level Log level
     * @returns Colorized level string
     */
    private colorizeLevel;
    /**
     * Truncate string to maximum length
     * @param str String to truncate
     * @param maxLength Maximum length
     * @returns Truncated string
     */
    private truncateString;
}