import type { FilterRule } from './log-filter.service.js';
export interface LogFormatterOptions {
    noColor: boolean;
}
export interface HeaderConfig {
    filterRules: FilterRule[];
    host: string;
    interval: number;
    output?: string;
}
export declare class LogFormatterService {
    private noColor;
    constructor(options: LogFormatterOptions);
    /**
     * Format the header display for log tailing.
     * Returns an array of lines to output.
     */
    formatHeader(config: HeaderConfig): string[];
    /**
     * Format a single log entry for display.
     * Returns an array of lines to output.
     */
    formatLog(log: Record<string, unknown>, count: number): string[];
    /**
     * Highlight keywords in text using the provided formatter function.
     * Uses word-boundary matching to avoid partial matches.
     */
    highlightKeywords(text: string, keywords: string[], formatter: (text: string) => string): string;
}
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