/**
 * Generic RequestFormatterService for handling complex prompt objects.
 * - Removes domain-specific dependencies (no book-specific fields)
 * - Supports flexible extraction and formatting of nested request structures
 */
export declare class RequestFormatterService {
    /**
     * Format user message based on the prompt type and use case template.
     * Handles strings directly and formats objects into structured sections.
     */
    static formatUserMessage(prompt: any, templateFunction: (formattedPrompt: string) => string, useCaseName: string): string;
    /**
     * Validate that a prompt is not empty
     */
    static isValidPrompt(prompt: any): boolean;
    /**
     * Extract context information from various prompt formats (generic)
     */
    static extractContext(prompt: any): any | null;
    /**
     * Extract user instruction from various prompt formats (generic)
     */
    static extractInstruction(prompt: any): string;
    /**
     * Backward-compat alias for extractInstruction()
     */
    static extractUserInstruction(prompt: any): string;
    /**
     * Create a structured prompt object from simple inputs
     */
    static createStructuredPrompt(instruction: string, context?: any): object;
    /**
     * Merge multiple prompt components into a single formatted prompt string
     */
    static mergePromptComponents(components: Array<string | object>): string;
    /**
     * Sanitize prompt content to remove potentially problematic characters
     */
    static sanitizePrompt(prompt: string): string;
    /**
     * Get statistics about a prompt
     */
    static getPromptStats(prompt: any): {
        type: 'string' | 'object' | 'unknown';
        charCount: number;
        wordCount: number;
        hasContext: boolean;
        isValid: boolean;
    };
    /**
     * Extract data from various prompt formats (context + instruction + raw)
     */
    private static extractPromptData;
    /**
     * Build formatted prompt string from extracted data using FlatFormatter for context
     */
    private static buildFormattedPrompt;
    /**
     * Format a context object using FlatFormatter
     */
    private static formatContext;
    /**
     * Format a raw prompt object that doesn't match expected structure
     */
    private static formatRawPrompt;
    /**
     * Extract text content from various object structures (used by stats/merge fallbacks)
     */
    private static extractTextFromObject;
}
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