/**
 * Document Template Service
 *
 * Handles document formatting with knowledge-base template headers
 * and status emoji mapping.
 */
import { type DocumentMetadata, type DocumentStatus, type DocumentType } from '../types/document.types.js';
export declare class DocumentTemplateService {
    private readonly logger;
    /**
     * Format content with standard knowledge-base header
     */
    formatWithHeader(content: string, metadata: DocumentMetadata): string;
    /**
     * Normalize header line endings to ensure double spaces for Markdown line breaks
     * Use this when content already has a header that should be preserved
     */
    normalizeHeaderLineEndings(content: string): string;
    /**
     * Normalize all metadata line endings throughout the entire content body
     * This ensures **Key**: Value lines render with proper line breaks in Markdown preview
     */
    normalizeContentLineEndings(content: string): string;
    /**
     * Build the standard header block
     * Note: Double spaces at end of lines create Markdown line breaks
     */
    private buildHeader;
    /**
     * Remove existing header from content if present
     */
    private removeExistingHeader;
    /**
     * Get status emoji for document status
     */
    getStatusEmoji(status: DocumentStatus): string;
    /**
     * Get default title for document type
     */
    getDefaultTitle(type: DocumentType): string;
    /**
     * Create default metadata for a new document
     */
    createDefaultMetadata(type: DocumentType, purpose: string): DocumentMetadata;
    /**
     * Update metadata for an existing document
     */
    updateMetadata(existing: DocumentMetadata, updates?: Partial<DocumentMetadata>): DocumentMetadata;
    /**
     * Markdown formatting prefixes that indicate structural lines
     */
    private static readonly MARKDOWN_PREFIXES;
    /**
     * Check if a line is a formatting marker or structural syntax (not actual content)
     */
    private isFormattingLine;
    /**
     * Check if line is markdown formatting
     */
    private isMarkdownFormatting;
    /**
     * Check if line is JSON structural syntax
     */
    private isJsonStructural;
    /**
     * Try to extract meaningful text from JSON content
     */
    private extractFromJson;
    /**
     * Extract purpose from content if not provided
     */
    extractPurpose(content: string, type: DocumentType): string;
    /**
     * Get default purpose for document type
     */
    private getDefaultPurpose;
    /**
     * Truncate text at a sentence boundary up to maxLength
     * Ensures we don't cut off mid-sentence
     */
    private truncateAtSentence;
}
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