/**
 * HIGContentExtractor
 *
 * Specialized service for extracting high-quality content from Apple's HIG pages
 * with advanced quality scoring and validation to achieve 95%+ real content SLA.
 */
import type { HIGSection } from '../types.js';
export interface ContentQualityMetrics {
    score: number;
    length: number;
    structureScore: number;
    appleTermsScore: number;
    codeExamplesCount: number;
    imageReferencesCount: number;
    headingCount: number;
    isFallbackContent: boolean;
    extractionMethod: string;
    confidence: number;
}
export interface ProcessedContent {
    content: string;
    summary: string;
    tableOfContents: string;
    codeExamples: string[];
    imageReferences: string[];
    relatedSections: string[];
    keywords: string[];
    quality: ContentQualityMetrics;
}
export declare class HIGContentExtractor {
    private appleDesignTerms;
    private applePlatformTerms;
    private fallbackIndicators;
    /**
     * Extract and process content from raw HTML or text
     */
    extractContent(rawContent: string, section: HIGSection): Promise<ProcessedContent>;
    /**
     * Clean and normalize raw content
     */
    private cleanRawContent;
    /**
     * Extract code examples from content
     */
    private extractCodeExamples;
    /**
     * Extract image references from content
     */
    private extractImageReferences;
    /**
     * Extract headings from content
     */
    private extractHeadings;
    /**
     * Extract related sections from content
     */
    private extractRelatedSections;
    /**
     * Extract keywords from content
     */
    private extractKeywords;
    /**
     * Generate table of contents from headings
     */
    private generateTableOfContents;
    /**
     * Generate content summary
     */
    private generateSummary;
    /**
     * Calculate comprehensive quality metrics
     */
    private calculateQualityMetrics;
    /**
     * Calculate confidence in the extracted content
     */
    private calculateConfidence;
    /**
     * Check if a word is a stop word
     */
    private isStopWord;
    /**
     * Validate content meets minimum quality standards
     */
    isHighQualityContent(metrics: ContentQualityMetrics): boolean;
    /**
     * Generate quality report for debugging
     */
    generateQualityReport(metrics: ContentQualityMetrics, section: HIGSection): string;
}
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