import { Locale, LocaleKeywords } from '../types';

/**
 * Keyword Strategy Configuration
 * Defines how keywords should be used across the site
 */

export const keywordStrategy = {
  density: {
    min: 0.5,      // 0.5% minimum keyword density
    max: 2.5,      // 2.5% maximum (avoid keyword stuffing)
    optimal: 1.5   // 1.5% optimal density
  },
  
  placement: {
    title: true,           // Include keyword in page title
    h1: true,              // Include keyword in H1
    h2: true,              // Include in at least one H2
    firstParagraph: true,  // Include in first 100 words
    metaDescription: true, // Include in meta description
    altText: true          // Include in image alt text where relevant
  },
  
  variations: true,        // Use keyword variations/synonyms
  
  // Meta title/descriptions character limits
  metaLimits: {
    titleMin: 30,
    titleMax: 60,
    descriptionMin: 120,
    descriptionMax: 160
  }
};

/**
 * Get keyword usage recommendations for a page
 */
export function getKeywordRecommendations(
  pageType: keyof LocaleKeywords['pages'],
  locale: Locale
): { primary: string[]; secondary: string[]; recommendations: string[] } {
  const recommendations: string[] = [
    `Use primary keywords within first 100 words`,
    `Include at least one primary keyword in H1`,
    `Meta title should be ${keywordStrategy.metaLimits.titleMin}-${keywordStrategy.metaLimits.titleMax} characters`,
    `Meta description should be ${keywordStrategy.metaLimits.descriptionMin}-${keywordStrategy.metaLimits.descriptionMax} characters`,
    `Maintain ${keywordStrategy.density.optimal}% keyword density`,
    `Use keyword variations naturally throughout content`
  ];

  return {
    primary: [], // Will be populated by getKeywords
    secondary: [], // Will be populated by getKeywords
    recommendations
  };
}

export default keywordStrategy;