/**
 * Content Analyzer for SEO
 *
 * Analyzes WordPress content for SEO optimization opportunities including
 * readability scoring, keyword analysis, content structure evaluation,
 * and technical SEO factors.
 *
 * @since 2.7.0
 */
import type { WordPressPost } from "../../../types/wordpress.js";
import type { SEOAnalysisResult, SEOToolParams } from "../../../types/seo.js";
/**
 * Content analyzer for SEO evaluation
 */
export declare class ContentAnalyzer {
    private logger;
    private config;
    /**
     * Analyze post content for SEO factors
     *
     * @param post - WordPress post data
     * @param params - Analysis parameters
     * @returns Comprehensive SEO analysis
     */
    analyzePost(post: WordPressPost, params: SEOToolParams): Promise<SEOAnalysisResult>;
    /**
     * Extract text content from WordPress post
     *
     * @param post - WordPress post
     * @returns Combined content string
     * @private
     */
    private extractContent;
    /**
     * Strip HTML tags and return plain text
     *
     * @param html - HTML content
     * @returns Plain text
     * @private
     */
    private stripHtml;
    /**
     * Calculate comprehensive content metrics
     *
     * @param plainText - Plain text content
     * @param htmlContent - Original HTML content
     * @param params - Analysis parameters
     * @returns SEO metrics
     * @private
     */
    private calculateMetrics;
    /**
     * Generate SEO recommendations based on analysis
     *
     * @param post - WordPress post
     * @param metrics - Calculated metrics
     * @param params - Analysis parameters
     * @returns Array of recommendations
     * @private
     */
    private generateRecommendations;
    /**
     * Analyze focus keyword usage
     *
     * @param plainText - Plain text content
     * @param keyword - Focus keyword
     * @returns Keyword analysis
     * @private
     */
    private analyzeKeywords;
    /**
     * Analyze content structure
     *
     * @param htmlContent - HTML content
     * @returns Structure analysis
     * @private
     */
    private analyzeStructure;
    private getWords;
    private getSentences;
    private countSyllables;
    private calculateFleschReadingEase;
    private calculateFleschKincaidGrade;
    private calculateKeywordDensity;
    private countHeadings;
    private countLinks;
    private countImages;
    private findSemanticKeywords;
    private checkHeadingHierarchy;
    private getCurrentDomain;
    private calculateOverallScore;
    private getScoreStatus;
}
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