// ========================================
// FICHIER: PatternBreakingCore.js
// RESPONSABILITÉ: Orchestrateur principal Pattern Breaking
// Niveau 2: Casser les patterns syntaxiques typiques des LLMs
// ========================================

const { logSh } = require('../ErrorReporting');
const { tracer } = require('../trace');
const { varyStructures, splitLongSentences, mergeShorter } = require('./SyntaxVariations');
const { replaceLLMFingerprints, detectLLMPatterns } = require('./LLMFingerprints');
const { humanizeTransitions, replaceConnectors } = require('./NaturalConnectors');

/**
 * CONFIGURATION PAR DÉFAUT PATTERN BREAKING
 */
const DEFAULT_CONFIG = {
  syntaxVariationEnabled: true,
  llmFingerprintReplacement: true,
  naturalConnectorsEnabled: true,
  intensityLevel: 0.5,              // Intensité globale (0-1)
  preserveReadability: true,        // Maintenir lisibilité
  maxModificationsPerElement: 4,    // Limite modifications par élément
  qualityThreshold: 0.6             // Seuil qualité minimum
};

/**
 * ORCHESTRATEUR PRINCIPAL - Pattern Breaking Layer
 * @param {object} content - Contenu généré à traiter
 * @param {object} options - Options de pattern breaking
 * @returns {object} - { content, stats, fallback }
 */
async function applyPatternBreakingLayer(content, options = {}) {
  return await tracer.run('PatternBreakingCore.applyPatternBreakingLayer()', async () => {
    const startTime = Date.now();
    
    await tracer.annotate({
      contentKeys: Object.keys(content).length,
      intensityLevel: options.intensityLevel,
      personality: options.csvData?.personality?.nom
    });

    logSh(`🔧 PATTERN BREAKING - Début traitement`, 'INFO');
    logSh(`   📊 ${Object.keys(content).length} éléments | Intensité: ${options.intensityLevel || DEFAULT_CONFIG.intensityLevel}`, 'DEBUG');

    try {
      // Configuration fusionnée
      const config = { ...DEFAULT_CONFIG, ...options };
      
      // Stats de pattern breaking
      const patternStats = {
        elementsProcessed: 0,
        syntaxModifications: 0,
        llmFingerprintReplacements: 0,
        connectorReplacements: 0,
        totalModifications: 0,
        fallbackUsed: false,
        patternsDetected: 0
      };

      // Contenu traité
      let processedContent = { ...content };

      // ========================================
      // TRAITEMENT PAR ÉLÉMENT
      // ========================================
      for (const [elementKey, elementContent] of Object.entries(content)) {
        await tracer.run(`PatternBreaking.processElement(${elementKey})`, async () => {
          
          logSh(`   🎯 Traitement élément: ${elementKey}`, 'DEBUG');
          
          let currentContent = elementContent;
          let elementModifications = 0;

          try {
            // 1. Détection patterns LLM
            const detectedPatterns = detectLLMPatterns(currentContent);
            patternStats.patternsDetected += detectedPatterns.count;
            
            if (detectedPatterns.count > 0) {
              logSh(`     🔍 ${detectedPatterns.count} patterns LLM détectés: ${detectedPatterns.patterns.slice(0, 3).join(', ')}`, 'DEBUG');
            }

            // 2. Variation syntaxique
            if (config.syntaxVariationEnabled) {
              const syntaxResult = await applySyntaxVariation(currentContent, config);
              currentContent = syntaxResult.content;
              elementModifications += syntaxResult.modifications;
              patternStats.syntaxModifications += syntaxResult.modifications;
              
              logSh(`     📝 Syntaxe: ${syntaxResult.modifications} variations appliquées`, 'DEBUG');
            }

            // 3. Remplacement fingerprints LLM
            if (config.llmFingerprintReplacement && detectedPatterns.count > 0) {
              const fingerprintResult = await applyLLMFingerprints(currentContent, config);
              currentContent = fingerprintResult.content;
              elementModifications += fingerprintResult.modifications;
              patternStats.llmFingerprintReplacements += fingerprintResult.modifications;
              
              logSh(`     🤖 LLM Fingerprints: ${fingerprintResult.modifications} remplacements`, 'DEBUG');
            }

            // 4. Connecteurs naturels
            if (config.naturalConnectorsEnabled) {
              const connectorResult = await applyNaturalConnectors(currentContent, config);
              currentContent = connectorResult.content;
              elementModifications += connectorResult.modifications;
              patternStats.connectorReplacements += connectorResult.modifications;
              
              logSh(`     🔗 Connecteurs: ${connectorResult.modifications} humanisés`, 'DEBUG');
            }

            // 5. Validation qualité
            const qualityCheck = validatePatternBreakingQuality(elementContent, currentContent, config.qualityThreshold);
            
            if (qualityCheck.acceptable) {
              processedContent[elementKey] = currentContent;
              patternStats.elementsProcessed++;
              patternStats.totalModifications += elementModifications;
              
              logSh(`     ✅ Élément traité: ${elementModifications} modifications totales`, 'DEBUG');
            } else {
              // Fallback: garder contenu original
              processedContent[elementKey] = elementContent;
              patternStats.fallbackUsed = true;
              
              logSh(`     ⚠️ Qualité insuffisante, fallback vers contenu original`, 'WARNING');
            }

          } catch (elementError) {
            logSh(`     ❌ Erreur pattern breaking élément ${elementKey}: ${elementError.message}`, 'WARNING');
            processedContent[elementKey] = elementContent; // Fallback
            patternStats.fallbackUsed = true;
          }

        }, { elementKey, originalLength: elementContent?.length });
      }

      // ========================================
      // RÉSULTATS FINAUX
      // ========================================
      const duration = Date.now() - startTime;
      const success = patternStats.elementsProcessed > 0 && !patternStats.fallbackUsed;

      logSh(`🔧 PATTERN BREAKING - Terminé (${duration}ms)`, 'INFO');
      logSh(`   ✅ ${patternStats.elementsProcessed}/${Object.keys(content).length} éléments traités`, 'INFO');
      logSh(`   📊 ${patternStats.syntaxModifications} syntaxe | ${patternStats.llmFingerprintReplacements} fingerprints | ${patternStats.connectorReplacements} connecteurs`, 'INFO');
      logSh(`   🎯 Patterns détectés: ${patternStats.patternsDetected} | Fallback: ${patternStats.fallbackUsed ? 'OUI' : 'NON'}`, 'INFO');

      await tracer.event('Pattern Breaking terminé', {
        success,
        duration,
        stats: patternStats
      });

      return {
        content: processedContent,
        stats: patternStats,
        fallback: patternStats.fallbackUsed,
        duration
      };

    } catch (error) {
      const duration = Date.now() - startTime;
      logSh(`❌ PATTERN BREAKING ÉCHOUÉ (${duration}ms): ${error.message}`, 'ERROR');
      
      await tracer.event('Pattern Breaking échoué', {
        error: error.message,
        duration,
        contentKeys: Object.keys(content).length
      });

      // Fallback complet
      return {
        content,
        stats: { fallbackUsed: true, error: error.message },
        fallback: true,
        duration
      };
    }

  }, { 
    contentElements: Object.keys(content).length,
    intensityLevel: options.intensityLevel 
  });
}

/**
 * APPLICATION VARIATION SYNTAXIQUE
 */
async function applySyntaxVariation(content, config) {
  const syntaxResult = varyStructures(content, config.intensityLevel, {
    preserveReadability: config.preserveReadability,
    maxModifications: Math.floor(config.maxModificationsPerElement / 2)
  });

  return {
    content: syntaxResult.content,
    modifications: syntaxResult.modifications || 0
  };
}

/**
 * APPLICATION REMPLACEMENT LLM FINGERPRINTS
 */
async function applyLLMFingerprints(content, config) {
  const fingerprintResult = replaceLLMFingerprints(content, {
    intensity: config.intensityLevel,
    preserveContext: true,
    maxReplacements: Math.floor(config.maxModificationsPerElement / 2)
  });

  return {
    content: fingerprintResult.content,
    modifications: fingerprintResult.replacements || 0
  };
}

/**
 * APPLICATION CONNECTEURS NATURELS
 */
async function applyNaturalConnectors(content, config) {
  const connectorResult = humanizeTransitions(content, {
    intensity: config.intensityLevel,
    preserveMeaning: true,
    maxReplacements: Math.floor(config.maxModificationsPerElement / 2)
  });

  return {
    content: connectorResult.content,
    modifications: connectorResult.replacements || 0
  };
}

/**
 * VALIDATION QUALITÉ PATTERN BREAKING
 */
function validatePatternBreakingQuality(originalContent, processedContent, qualityThreshold) {
  if (!originalContent || !processedContent) {
    return { acceptable: false, reason: 'Contenu manquant' };
  }

  // Métriques de base
  const lengthDiff = Math.abs(processedContent.length - originalContent.length) / originalContent.length;
  const wordCountOriginal = originalContent.split(/\s+/).length;
  const wordCountProcessed = processedContent.split(/\s+/).length;
  const wordCountDiff = Math.abs(wordCountProcessed - wordCountOriginal) / wordCountOriginal;

  // Vérifications qualité
  const checks = {
    lengthPreserved: lengthDiff < 0.3,          // Pas plus de 30% de différence
    wordCountPreserved: wordCountDiff < 0.2,    // Pas plus de 20% de différence
    noEmpty: processedContent.trim().length > 0, // Pas de contenu vide
    readableStructure: processedContent.includes('.') // Structure lisible
  };

  const passedChecks = Object.values(checks).filter(Boolean).length;
  const score = passedChecks / Object.keys(checks).length;
  
  const acceptable = score >= qualityThreshold;

  logSh(`   🎯 Validation Pattern Breaking: ${acceptable ? 'ACCEPTÉ' : 'REJETÉ'} (score: ${score.toFixed(2)})`, acceptable ? 'DEBUG' : 'WARNING');

  return {
    acceptable,
    score,
    checks,
    reason: acceptable ? 'Qualité acceptable' : 'Score qualité insuffisant'
  };
}

// ============= EXPORTS =============
module.exports = {
  applyPatternBreakingLayer,
  applySyntaxVariation,
  applyLLMFingerprints,
  applyNaturalConnectors,
  validatePatternBreakingQuality,
  DEFAULT_CONFIG
};