// ========================================
// SELECTIVE UTILS - UTILITAIRES MODULAIRES
// Responsabilité: Fonctions utilitaires partagées par tous les modules selective
// Architecture: Helper functions réutilisables et composables
// ========================================

const { logSh } = require('../ErrorReporting');

/**
 * ANALYSEURS DE CONTENU SELECTIVE
 */

/**
 * Analyser qualité technique d'un contenu
 */
function analyzeTechnicalQuality(content, contextualTerms = []) {
  if (!content || typeof content !== 'string') return { score: 0, details: {} };
  
  const analysis = {
    score: 0,
    details: {
      technicalTermsFound: 0,
      technicalTermsExpected: contextualTerms.length,
      genericWordsCount: 0,
      hasSpecifications: false,
      hasDimensions: false,
      contextIntegration: 0
    }
  };
  
  const lowerContent = content.toLowerCase();
  
  // 1. Compter termes techniques présents
  contextualTerms.forEach(term => {
    if (lowerContent.includes(term.toLowerCase())) {
      analysis.details.technicalTermsFound++;
    }
  });
  
  // 2. Détecter mots génériques
  const genericWords = ['produit', 'solution', 'service', 'offre', 'article', 'élément'];
  analysis.details.genericWordsCount = genericWords.filter(word => 
    lowerContent.includes(word)
  ).length;
  
  // 3. Vérifier spécifications techniques
  analysis.details.hasSpecifications = /\b(norme|iso|din|ce)\b/i.test(content);
  
  // 4. Vérifier dimensions/données techniques
  analysis.details.hasDimensions = /\d+\s*(mm|cm|m|%|°|kg|g)\b/i.test(content);
  
  // 5. Calculer score global (0-100)
  const termRatio = contextualTerms.length > 0 ? 
    (analysis.details.technicalTermsFound / contextualTerms.length) * 40 : 20;
  const genericPenalty = Math.min(20, analysis.details.genericWordsCount * 5);
  const specificationBonus = analysis.details.hasSpecifications ? 15 : 0;
  const dimensionBonus = analysis.details.hasDimensions ? 15 : 0;
  const lengthBonus = content.length > 100 ? 10 : 0;
  
  analysis.score = Math.max(0, Math.min(100, 
    termRatio + specificationBonus + dimensionBonus + lengthBonus - genericPenalty
  ));
  
  return analysis;
}

/**
 * Analyser fluidité des transitions
 */
function analyzeTransitionFluidity(content) {
  if (!content || typeof content !== 'string') return { score: 0, details: {} };
  
  const sentences = content.split(/[.!?]+/)
    .map(s => s.trim())
    .filter(s => s.length > 5);
    
  if (sentences.length < 2) {
    return { score: 100, details: { reason: 'Contenu trop court pour analyse transitions' } };
  }
  
  const analysis = {
    score: 0,
    details: {
      sentencesCount: sentences.length,
      connectorsFound: 0,
      repetitiveConnectors: 0,
      abruptTransitions: 0,
      averageSentenceLength: 0,
      lengthVariation: 0
    }
  };
  
  // 1. Analyser connecteurs
  const commonConnectors = ['par ailleurs', 'en effet', 'de plus', 'cependant', 'ainsi', 'donc', 'ensuite'];
  const connectorCounts = {};
  
  commonConnectors.forEach(connector => {
    const matches = (content.match(new RegExp(`\\b${connector}\\b`, 'gi')) || []);
    connectorCounts[connector] = matches.length;
    analysis.details.connectorsFound += matches.length;
    if (matches.length > 1) analysis.details.repetitiveConnectors++;
  });
  
  // 2. Détecter transitions abruptes
  for (let i = 1; i < sentences.length; i++) {
    const sentence = sentences[i].toLowerCase().trim();
    const hasConnector = commonConnectors.some(connector => 
      sentence.startsWith(connector) || sentence.includes(` ${connector} `)
    );
    
    if (!hasConnector && sentence.length > 20) {
      analysis.details.abruptTransitions++;
    }
  }
  
  // 3. Analyser variation de longueur
  const lengths = sentences.map(s => s.split(/\s+/).length);
  analysis.details.averageSentenceLength = lengths.reduce((a, b) => a + b, 0) / lengths.length;
  
  const variance = lengths.reduce((acc, len) => 
    acc + Math.pow(len - analysis.details.averageSentenceLength, 2), 0
  ) / lengths.length;
  analysis.details.lengthVariation = Math.sqrt(variance);
  
  // 4. Calculer score fluidité (0-100)
  const connectorScore = Math.min(30, (analysis.details.connectorsFound / sentences.length) * 100);
  const repetitionPenalty = Math.min(20, analysis.details.repetitiveConnectors * 5);
  const abruptPenalty = Math.min(30, (analysis.details.abruptTransitions / sentences.length) * 50);
  const variationScore = Math.min(20, analysis.details.lengthVariation * 2);
  
  analysis.score = Math.max(0, Math.min(100,
    connectorScore + variationScore - repetitionPenalty - abruptPenalty + 50
  ));
  
  return analysis;
}

/**
 * Analyser cohérence de style
 */
function analyzeStyleConsistency(content, expectedPersonality = null) {
  if (!content || typeof content !== 'string') return { score: 0, details: {} };
  
  const analysis = {
    score: 0,
    details: {
      personalityAlignment: 0,
      toneConsistency: 0,
      vocabularyLevel: 'standard',
      formalityScore: 0,
      personalityWordsFound: 0
    }
  };
  
  // 1. Analyser alignement personnalité
  if (expectedPersonality && expectedPersonality.vocabulairePref) {
    const personalityWords = expectedPersonality.vocabulairePref.toLowerCase().split(',');
    const contentLower = content.toLowerCase();
    
    personalityWords.forEach(word => {
      if (word.trim() && contentLower.includes(word.trim())) {
        analysis.details.personalityWordsFound++;
      }
    });
    
    analysis.details.personalityAlignment = personalityWords.length > 0 ?
      (analysis.details.personalityWordsFound / personalityWords.length) * 100 : 0;
  }
  
  // 2. Analyser niveau vocabulaire
  const technicalWords = content.match(/\b\w{8,}\b/g) || [];
  const totalWords = content.split(/\s+/).length;
  const techRatio = technicalWords.length / totalWords;
  
  if (techRatio > 0.15) analysis.details.vocabularyLevel = 'expert';
  else if (techRatio < 0.05) analysis.details.vocabularyLevel = 'accessible';
  else analysis.details.vocabularyLevel = 'standard';
  
  // 3. Analyser formalité
  const formalIndicators = ['il convient de', 'par conséquent', 'néanmoins', 'toutefois'];
  const casualIndicators = ['du coup', 'sympa', 'cool', 'nickel'];
  
  let formalCount = formalIndicators.filter(indicator => 
    content.toLowerCase().includes(indicator)
  ).length;
  
  let casualCount = casualIndicators.filter(indicator => 
    content.toLowerCase().includes(indicator)
  ).length;
  
  analysis.details.formalityScore = formalCount - casualCount; // Positif = formel, négatif = casual
  
  // 4. Calculer score cohérence (0-100)
  let baseScore = 50;
  
  if (expectedPersonality) {
    baseScore += analysis.details.personalityAlignment * 0.3;
    
    // Ajustements selon niveau technique attendu
    const expectedLevel = expectedPersonality.niveauTechnique || 'standard';
    if (expectedLevel === analysis.details.vocabularyLevel) {
      baseScore += 20;
    } else {
      baseScore -= 10;
    }
  }
  
  // Bonus cohérence tonale
  const sentences = content.split(/[.!?]+/).filter(s => s.length > 10);
  if (sentences.length > 1) {
    baseScore += Math.min(20, analysis.details.lengthVariation || 10);
  }
  
  analysis.score = Math.max(0, Math.min(100, baseScore));
  
  return analysis;
}

/**
 * COMPARATEURS ET MÉTRIQUES
 */

/**
 * Comparer deux contenus et calculer taux amélioration
 */
function compareContentImprovement(original, enhanced, analysisType = 'general') {
  if (!original || !enhanced) return { improvementRate: 0, details: {} };
  
  const comparison = {
    improvementRate: 0,
    details: {
      lengthChange: ((enhanced.length - original.length) / original.length) * 100,
      wordCountChange: 0,
      structuralChanges: 0,
      contentPreserved: true
    }
  };
  
  // 1. Analyser changements structurels
  const originalSentences = original.split(/[.!?]+/).length;
  const enhancedSentences = enhanced.split(/[.!?]+/).length;
  comparison.details.structuralChanges = Math.abs(enhancedSentences - originalSentences);
  
  // 2. Analyser changements de mots
  const originalWords = original.toLowerCase().split(/\s+/).filter(w => w.length > 2);
  const enhancedWords = enhanced.toLowerCase().split(/\s+/).filter(w => w.length > 2);
  comparison.details.wordCountChange = enhancedWords.length - originalWords.length;
  
  // 3. Vérifier préservation du contenu principal
  const originalKeyWords = originalWords.filter(w => w.length > 4);
  const preservedWords = originalKeyWords.filter(w => enhanced.toLowerCase().includes(w));
  comparison.details.contentPreserved = (preservedWords.length / originalKeyWords.length) > 0.7;
  
  // 4. Calculer taux amélioration selon type d'analyse
  switch (analysisType) {
    case 'technical':
      const originalTech = analyzeTechnicalQuality(original);
      const enhancedTech = analyzeTechnicalQuality(enhanced);
      comparison.improvementRate = enhancedTech.score - originalTech.score;
      break;
      
    case 'transitions':
      const originalFluid = analyzeTransitionFluidity(original);
      const enhancedFluid = analyzeTransitionFluidity(enhanced);
      comparison.improvementRate = enhancedFluid.score - originalFluid.score;
      break;
      
    case 'style':
      const originalStyle = analyzeStyleConsistency(original);
      const enhancedStyle = analyzeStyleConsistency(enhanced);
      comparison.improvementRate = enhancedStyle.score - originalStyle.score;
      break;
      
    default:
      // Amélioration générale (moyenne pondérée)
      comparison.improvementRate = Math.min(50, Math.abs(comparison.details.lengthChange) * 0.1 +
        (comparison.details.contentPreserved ? 20 : -20) +
        Math.min(15, Math.abs(comparison.details.wordCountChange)));
  }
  
  return comparison;
}

/**
 * UTILITAIRES DE CONTENU
 */

/**
 * Nettoyer contenu généré par LLM
 */
function cleanGeneratedContent(content, cleaningLevel = 'standard') {
  if (!content || typeof content !== 'string') return content;
  
  let cleaned = content.trim();
  
  // Nettoyage de base
  cleaned = cleaned.replace(/^(voici\s+)?le\s+contenu\s+(amélioré|modifié|réécrit)[:\s]*/gi, '');
  cleaned = cleaned.replace(/^(bon,?\s*)?(alors,?\s*)?(voici\s+)?/gi, '');
  cleaned = cleaned.replace(/^(avec\s+les?\s+)?améliorations?\s*[:\s]*/gi, '');
  
  // Nettoyage formatage
  cleaned = cleaned.replace(/\*\*([^*]+)\*\*/g, '$1'); // Gras markdown → texte normal
  cleaned = cleaned.replace(/\s{2,}/g, ' '); // Espaces multiples
  cleaned = cleaned.replace(/([.!?])\s*([.!?])/g, '$1 '); // Double ponctuation
  
  if (cleaningLevel === 'intensive') {
    // Nettoyage intensif
    cleaned = cleaned.replace(/^\s*[-*+]\s*/gm, ''); // Puces en début de ligne
    cleaned = cleaned.replace(/^(pour\s+)?(ce\s+)?(contenu\s*)?[,:]?\s*/gi, '');
    cleaned = cleaned.replace(/\([^)]*\)/g, ''); // Parenthèses et contenu
  }
  
  // Nettoyage final
  cleaned = cleaned.replace(/^[,.\s]+/, ''); // Début
  cleaned = cleaned.replace(/[,\s]+$/, ''); // Fin
  cleaned = cleaned.trim();
  
  return cleaned;
}

/**
 * Valider contenu selective
 */
function validateSelectiveContent(content, originalContent, criteria = {}) {
  const validation = {
    isValid: true,
    score: 0,
    issues: [],
    suggestions: []
  };
  
  const {
    minLength = 20,
    maxLengthChange = 50, // % de changement maximum
    preserveContent = true,
    checkTechnicalTerms = true
  } = criteria;
  
  // 1. Vérifier longueur
  if (!content || content.length < minLength) {
    validation.isValid = false;
    validation.issues.push('Contenu trop court');
    validation.suggestions.push('Augmenter la longueur du contenu généré');
  } else {
    validation.score += 25;
  }
  
  // 2. Vérifier changements de longueur
  if (originalContent) {
    const lengthChange = Math.abs((content.length - originalContent.length) / originalContent.length) * 100;
    
    if (lengthChange > maxLengthChange) {
      validation.issues.push('Changement de longueur excessif');
      validation.suggestions.push('Réduire l\'intensité d\'amélioration');
    } else {
      validation.score += 25;
    }
    
    // 3. Vérifier préservation du contenu
    if (preserveContent) {
      const preservation = compareContentImprovement(originalContent, content);
      
      if (!preservation.details.contentPreserved) {
        validation.isValid = false;
        validation.issues.push('Contenu original non préservé');
        validation.suggestions.push('Améliorer conservation du sens original');
      } else {
        validation.score += 25;
      }
    }
  }
  
  // 4. Vérifications spécifiques
  if (checkTechnicalTerms) {
    const technicalQuality = analyzeTechnicalQuality(content);
    
    if (technicalQuality.score > 60) {
      validation.score += 25;
    } else if (technicalQuality.score < 30) {
      validation.issues.push('Qualité technique insuffisante');
      validation.suggestions.push('Ajouter plus de termes techniques spécialisés');
    }
  }
  
  // Score final et validation
  validation.score = Math.min(100, validation.score);
  validation.isValid = validation.isValid && validation.score >= 60;
  
  return validation;
}

/**
 * UTILITAIRES TECHNIQUES
 */

/**
 * Chunk array avec gestion intelligente
 */
function chunkArray(array, chunkSize, smartChunking = false) {
  if (!Array.isArray(array)) return [];
  if (array.length <= chunkSize) return [array];
  
  const chunks = [];
  
  if (smartChunking) {
    // Chunking intelligent : éviter de séparer éléments liés
    let currentChunk = [];
    
    for (let i = 0; i < array.length; i++) {
      currentChunk.push(array[i]);
      
      // Conditions de fin de chunk intelligente
      const isChunkFull = currentChunk.length >= chunkSize;
      const isLastElement = i === array.length - 1;
      const nextElementRelated = i < array.length - 1 && 
        array[i].tag && array[i + 1].tag && 
        array[i].tag.includes('FAQ') && array[i + 1].tag.includes('FAQ');
      
      if ((isChunkFull && !nextElementRelated) || isLastElement) {
        chunks.push([...currentChunk]);
        currentChunk = [];
      }
    }
    
    // Ajouter chunk restant si non vide
    if (currentChunk.length > 0) {
      if (chunks.length > 0 && chunks[chunks.length - 1].length + currentChunk.length <= chunkSize * 1.2) {
        // Merger avec dernier chunk si pas trop gros
        chunks[chunks.length - 1].push(...currentChunk);
      } else {
        chunks.push(currentChunk);
      }
    }
  } else {
    // Chunking standard
    for (let i = 0; i < array.length; i += chunkSize) {
      chunks.push(array.slice(i, i + chunkSize));
    }
  }
  
  return chunks;
}

/**
 * Sleep avec logging optionnel
 */
async function sleep(ms, logMessage = null) {
  if (logMessage) {
    logSh(`⏳ ${logMessage} (${ms}ms)`, 'DEBUG');
  }
  
  return new Promise(resolve => setTimeout(resolve, ms));
}

/**
 * Mesurer performance d'opération
 */
function measurePerformance(operationName, startTime = Date.now()) {
  const endTime = Date.now();
  const duration = endTime - startTime;
  
  const performance = {
    operationName,
    startTime,
    endTime,
    duration,
    durationFormatted: formatDuration(duration)
  };
  
  return performance;
}

/**
 * Formater durée en format lisible
 */
function formatDuration(ms) {
  if (ms < 1000) return `${ms}ms`;
  if (ms < 60000) return `${(ms / 1000).toFixed(1)}s`;
  return `${Math.floor(ms / 60000)}m ${Math.floor((ms % 60000) / 1000)}s`;
}

/**
 * GÉNÉRATION SIMPLE (REMPLACE CONTENTGENERATION.JS)
 */

/**
 * Génération simple Claude uniquement (compatible avec l'ancien système)
 */
async function generateSimple(hierarchy, csvData) {
  const { LLMManager } = require('../LLMManager');
  
  logSh(`🔥 Génération simple Claude uniquement`, 'INFO');
  
  if (!hierarchy || Object.keys(hierarchy).length === 0) {
    throw new Error('Hiérarchie vide ou invalide');
  }
  
  const result = {
    content: {},
    stats: {
      processed: 0,
      enhanced: 0,
      duration: 0,
      llmProvider: 'claude'
    }
  };
  
  const startTime = Date.now();
  
  try {
    // Générer chaque élément avec Claude
    for (const [tag, instruction] of Object.entries(hierarchy)) {
      try {
        logSh(`🎯 Génération: ${tag}`, 'DEBUG');
        
        const prompt = `Tu es un expert en rédaction SEO. Tu dois générer du contenu professionnel et naturel.

CONTEXTE:
- Mot-clé principal: ${csvData.mc0}
- Titre principal: ${csvData.t0}
- Personnalité: ${csvData.personality?.nom} (${csvData.personality?.style})

INSTRUCTION SPÉCIFIQUE:
${instruction}

CONSIGNES:
- Contenu naturel et engageant
- Intégration naturelle du mot-clé "${csvData.mc0}"
- Style ${csvData.personality?.style || 'professionnel'}
- Pas de formatage markdown
- Réponse directe sans préambule

RÉPONSE:`;

        const response = await LLMManager.callLLM('claude', prompt, {
          temperature: 0.9,
          maxTokens: 300,
          timeout: 30000
        });
        
        if (response && response.trim()) {
          result.content[tag] = cleanGeneratedContent(response.trim());
          result.stats.processed++;
          result.stats.enhanced++;
        } else {
          logSh(`⚠️ Réponse vide pour ${tag}`, 'WARNING');
          result.content[tag] = `Contenu ${tag} généré automatiquement`;
        }
        
      } catch (error) {
        logSh(`❌ Erreur génération ${tag}: ${error.message}`, 'ERROR');
        result.content[tag] = `Contenu ${tag} - Erreur de génération`;
      }
    }
    
    result.stats.duration = Date.now() - startTime;
    
    logSh(`✅ Génération simple terminée: ${result.stats.enhanced}/${result.stats.processed} éléments (${result.stats.duration}ms)`, 'INFO');
    
    return result;
    
  } catch (error) {
    result.stats.duration = Date.now() - startTime;
    logSh(`❌ Échec génération simple: ${error.message}`, 'ERROR');
    throw error;
  }
}

/**
 * STATISTIQUES ET RAPPORTS
 */

/**
 * Générer rapport amélioration
 */
function generateImprovementReport(originalContent, enhancedContent, layerType = 'general') {
  const report = {
    layerType,
    timestamp: new Date().toISOString(),
    summary: {
      elementsProcessed: 0,
      elementsImproved: 0,
      averageImprovement: 0,
      totalExecutionTime: 0
    },
    details: {
      byElement: [],
      qualityMetrics: {},
      recommendations: []
    }
  };
  
  // Analyser chaque élément
  Object.keys(originalContent).forEach(tag => {
    const original = originalContent[tag];
    const enhanced = enhancedContent[tag];
    
    if (original && enhanced) {
      report.summary.elementsProcessed++;
      
      const improvement = compareContentImprovement(original, enhanced, layerType);
      
      if (improvement.improvementRate > 0) {
        report.summary.elementsImproved++;
      }
      
      report.summary.averageImprovement += improvement.improvementRate;
      
      report.details.byElement.push({
        tag,
        improvementRate: improvement.improvementRate,
        lengthChange: improvement.details.lengthChange,
        contentPreserved: improvement.details.contentPreserved
      });
    }
  });
  
  // Calculer moyennes
  if (report.summary.elementsProcessed > 0) {
    report.summary.averageImprovement = report.summary.averageImprovement / report.summary.elementsProcessed;
  }
  
  // Métriques qualité globales
  const fullOriginal = Object.values(originalContent).join(' ');
  const fullEnhanced = Object.values(enhancedContent).join(' ');
  
  report.details.qualityMetrics = {
    technical: analyzeTechnicalQuality(fullEnhanced),
    transitions: analyzeTransitionFluidity(fullEnhanced), 
    style: analyzeStyleConsistency(fullEnhanced)
  };
  
  // Recommandations
  if (report.summary.averageImprovement < 10) {
    report.details.recommendations.push('Augmenter l\'intensité d\'amélioration');
  }
  
  if (report.details.byElement.some(e => !e.contentPreserved)) {
    report.details.recommendations.push('Améliorer préservation du contenu original');
  }
  
  return report;
}

module.exports = {
  // Analyseurs
  analyzeTechnicalQuality,
  analyzeTransitionFluidity,
  analyzeStyleConsistency,
  
  // Comparateurs
  compareContentImprovement,
  
  // Utilitaires contenu
  cleanGeneratedContent,
  validateSelectiveContent,
  
  // Utilitaires techniques
  chunkArray,
  sleep,
  measurePerformance,
  formatDuration,
  
  // Génération simple (remplace ContentGeneration.js)
  generateSimple,
  
  // Rapports
  generateImprovementReport
};