// ========================================
// FICHIER: NaturalConnectors.js
// RESPONSABILITÉ: Humanisation des connecteurs et transitions
// Remplacement connecteurs formels par versions naturelles
// ========================================

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

/**
 * CONNECTEURS FORMELS LLM À HUMANISER
 */
const FORMAL_CONNECTORS = {
  // Connecteurs trop formels/académiques
  formal: [
    { connector: 'par ailleurs', alternatives: ['aussi', 'également', 'de plus', 'en plus'], suspicion: 0.75 },
    { connector: 'en outre', alternatives: ['de plus', 'également', 'aussi', 'en plus'], suspicion: 0.80 },
    { connector: 'de surcroît', alternatives: ['de plus', 'aussi', 'en plus'], suspicion: 0.85 },
    { connector: 'qui plus est', alternatives: ['en plus', 'et puis', 'aussi'], suspicion: 0.80 },
    { connector: 'par conséquent', alternatives: ['donc', 'alors', 'du coup', 'résultat'], suspicion: 0.70 },
    { connector: 'en conséquence', alternatives: ['donc', 'alors', 'du coup'], suspicion: 0.75 },
    { connector: 'néanmoins', alternatives: ['mais', 'pourtant', 'cependant', 'malgré ça'], suspicion: 0.65 },
    { connector: 'toutefois', alternatives: ['mais', 'pourtant', 'cependant'], suspicion: 0.70 }
  ],

  // Débuts de phrases formels
  formalStarts: [
    { phrase: 'il convient de noter que', alternatives: ['notons que', 'remarquons que', 'précisons que'], suspicion: 0.90 },
    { phrase: 'il est important de souligner que', alternatives: ['soulignons que', 'notons que', 'précisons que'], suspicion: 0.85 },
    { phrase: 'il est à noter que', alternatives: ['notons que', 'signalons que', 'précisons que'], suspicion: 0.80 },
    { phrase: 'il convient de préciser que', alternatives: ['précisons que', 'ajoutons que', 'notons que'], suspicion: 0.75 },
    { phrase: 'dans ce contexte', alternatives: ['ici', 'dans ce cas', 'alors'], suspicion: 0.70 }
  ],

  // Transitions artificielles
  artificialTransitions: [
    { phrase: 'abordons maintenant', alternatives: ['passons à', 'voyons', 'parlons de'], suspicion: 0.75 },
    { phrase: 'examinons à présent', alternatives: ['voyons', 'regardons', 'passons à'], suspicion: 0.80 },
    { phrase: 'intéressons-nous désormais à', alternatives: ['voyons', 'parlons de', 'passons à'], suspicion: 0.85 },
    { phrase: 'penchons-nous sur', alternatives: ['voyons', 'regardons', 'parlons de'], suspicion: 0.70 }
  ]
};

/**
 * CONNECTEURS NATURELS PAR CONTEXTE
 */
const NATURAL_CONNECTORS_BY_CONTEXT = {
  // Selon le ton/registre souhaité
  casual: ['du coup', 'alors', 'et puis', 'aussi', 'en fait'],
  conversational: ['bon', 'eh bien', 'donc', 'alors', 'et puis'],
  technical: ['donc', 'ainsi', 'alors', 'par là', 'de cette façon'],
  commercial: ['donc', 'alors', 'ainsi', 'de plus', 'aussi']
};

/**
 * HUMANISATION CONNECTEURS ET TRANSITIONS - FONCTION PRINCIPALE
 * @param {string} text - Texte à humaniser
 * @param {object} options - Options { intensity, preserveMeaning, maxReplacements }
 * @returns {object} - { content, replacements, details }
 */
function humanizeTransitions(text, options = {}) {
  if (!text || text.trim().length === 0) {
    return { content: text, replacements: 0 };
  }

  const config = {
    intensity: 0.6,
    preserveMeaning: true,
    maxReplacements: 4,
    tone: 'casual', // casual, conversational, technical, commercial
    ...options
  };

  logSh(`🔗 Humanisation connecteurs: intensité ${config.intensity}, ton ${config.tone}`, 'DEBUG');

  let modifiedText = text;
  let totalReplacements = 0;
  const replacementDetails = [];

  try {
    // 1. Remplacer connecteurs formels
    const connectorsResult = replaceFormalConnectors(modifiedText, config);
    modifiedText = connectorsResult.content;
    totalReplacements += connectorsResult.replacements;
    replacementDetails.push(...connectorsResult.details);

    // 2. Humaniser débuts de phrases
    if (totalReplacements < config.maxReplacements) {
      const startsResult = humanizeFormalStarts(modifiedText, config);
      modifiedText = startsResult.content;
      totalReplacements += startsResult.replacements;
      replacementDetails.push(...startsResult.details);
    }

    // 3. Remplacer transitions artificielles
    if (totalReplacements < config.maxReplacements) {
      const transitionsResult = replaceArtificialTransitions(modifiedText, config);
      modifiedText = transitionsResult.content;
      totalReplacements += transitionsResult.replacements;
      replacementDetails.push(...transitionsResult.details);
    }

    // 4. Ajouter variabilité contextuelle
    if (totalReplacements < config.maxReplacements) {
      const contextResult = addContextualVariability(modifiedText, config);
      modifiedText = contextResult.content;
      totalReplacements += contextResult.replacements;
      replacementDetails.push(...contextResult.details);
    }

    logSh(`🔗 Connecteurs humanisés: ${totalReplacements} remplacements effectués`, 'DEBUG');

  } catch (error) {
    logSh(`❌ Erreur humanisation connecteurs: ${error.message}`, 'WARNING');
    return { content: text, replacements: 0, details: [] };
  }

  return {
    content: modifiedText,
    replacements: totalReplacements,
    details: replacementDetails
  };
}

/**
 * REMPLACEMENT CONNECTEURS FORMELS
 */
function replaceFormalConnectors(text, config) {
  let modified = text;
  let replacements = 0;
  const details = [];

  FORMAL_CONNECTORS.formal.forEach(connector => {
    if (replacements >= Math.floor(config.maxReplacements / 2)) return;

    const regex = new RegExp(`\\b${connector.connector}\\b`, 'gi');
    const matches = modified.match(regex);
    
    if (matches && Math.random() < (config.intensity * connector.suspicion)) {
      // Choisir alternative selon contexte/ton
      const availableAlts = connector.alternatives;
      const contextualAlts = NATURAL_CONNECTORS_BY_CONTEXT[config.tone] || [];
      
      // Préférer alternatives contextuelles si disponibles
      const preferredAlts = availableAlts.filter(alt => contextualAlts.includes(alt));
      const finalAlts = preferredAlts.length > 0 ? preferredAlts : availableAlts;
      
      const chosen = finalAlts[Math.floor(Math.random() * finalAlts.length)];
      
      const beforeText = modified;
      modified = modified.replace(regex, chosen);
      
      if (modified !== beforeText) {
        replacements++;
        details.push({
          original: connector.connector,
          replacement: chosen,
          type: 'formal_connector',
          suspicion: connector.suspicion
        });
        
        logSh(`     🔄 Connecteur formalisé: "${connector.connector}" → "${chosen}"`, 'DEBUG');
      }
    }
  });

  return { content: modified, replacements, details };
}

/**
 * HUMANISATION DÉBUTS DE PHRASES FORMELS
 */
function humanizeFormalStarts(text, config) {
  let modified = text;
  let replacements = 0;
  const details = [];

  FORMAL_CONNECTORS.formalStarts.forEach(start => {
    if (replacements >= Math.floor(config.maxReplacements / 3)) return;

    const regex = new RegExp(start.phrase, 'gi');
    
    if (modified.match(regex) && Math.random() < (config.intensity * start.suspicion)) {
      const alternative = start.alternatives[Math.floor(Math.random() * start.alternatives.length)];
      
      const beforeText = modified;
      modified = modified.replace(regex, alternative);
      
      if (modified !== beforeText) {
        replacements++;
        details.push({
          original: start.phrase,
          replacement: alternative,
          type: 'formal_start',
          suspicion: start.suspicion
        });
        
        logSh(`     🚀 Début formalisé: "${start.phrase}" → "${alternative}"`, 'DEBUG');
      }
    }
  });

  return { content: modified, replacements, details };
}

/**
 * REMPLACEMENT TRANSITIONS ARTIFICIELLES
 */
function replaceArtificialTransitions(text, config) {
  let modified = text;
  let replacements = 0;
  const details = [];

  FORMAL_CONNECTORS.artificialTransitions.forEach(transition => {
    if (replacements >= Math.floor(config.maxReplacements / 4)) return;

    const regex = new RegExp(transition.phrase, 'gi');
    
    if (modified.match(regex) && Math.random() < (config.intensity * transition.suspicion * 0.8)) {
      const alternative = transition.alternatives[Math.floor(Math.random() * transition.alternatives.length)];
      
      const beforeText = modified;
      modified = modified.replace(regex, alternative);
      
      if (modified !== beforeText) {
        replacements++;
        details.push({
          original: transition.phrase,
          replacement: alternative,
          type: 'artificial_transition',
          suspicion: transition.suspicion
        });
        
        logSh(`     🌉 Transition artificialisée: "${transition.phrase}" → "${alternative}"`, 'DEBUG');
      }
    }
  });

  return { content: modified, replacements, details };
}

/**
 * AJOUT VARIABILITÉ CONTEXTUELLE
 */
function addContextualVariability(text, config) {
  let modified = text;
  let replacements = 0;
  const details = [];

  // Connecteurs génériques à contextualiser selon le ton
  const genericPatterns = [
    { from: /\bet puis\b/g, contextual: true },
    { from: /\bdone\b/g, contextual: true },
    { from: /\bainsi\b/g, contextual: true }
  ];

  const contextualReplacements = NATURAL_CONNECTORS_BY_CONTEXT[config.tone] || NATURAL_CONNECTORS_BY_CONTEXT.casual;

  genericPatterns.forEach(pattern => {
    if (replacements >= 2) return;

    if (pattern.contextual && Math.random() < (config.intensity * 0.4)) {
      const matches = modified.match(pattern.from);
      
      if (matches && contextualReplacements.length > 0) {
        const replacement = contextualReplacements[Math.floor(Math.random() * contextualReplacements.length)];
        
        // Éviter remplacements identiques
        if (replacement !== matches[0]) {
          const beforeText = modified;
          modified = modified.replace(pattern.from, replacement);
          
          if (modified !== beforeText) {
            replacements++;
            details.push({
              original: matches[0],
              replacement,
              type: 'contextual_variation',
              suspicion: 0.4
            });
            
            logSh(`     🎯 Variation contextuelle: "${matches[0]}" → "${replacement}"`, 'DEBUG');
          }
        }
      }
    }
  });

  return { content: modified, replacements, details };
}

/**
 * DÉTECTION CONNECTEURS FORMELS DANS TEXTE
 */
function detectFormalConnectors(text) {
  if (!text || text.trim().length === 0) {
    return { count: 0, connectors: [], suspicionScore: 0 };
  }

  const detectedConnectors = [];
  let totalSuspicion = 0;

  // Vérifier tous les types de connecteurs formels
  Object.values(FORMAL_CONNECTORS).flat().forEach(item => {
    const searchTerm = item.connector || item.phrase;
    const regex = new RegExp(`\\b${searchTerm}\\b`, 'gi');
    const matches = text.match(regex);
    
    if (matches) {
      detectedConnectors.push({
        connector: searchTerm,
        count: matches.length,
        suspicion: item.suspicion,
        alternatives: item.alternatives
      });
      
      totalSuspicion += item.suspicion * matches.length;
    }
  });

  const wordCount = text.split(/\s+/).length;
  const suspicionScore = wordCount > 0 ? totalSuspicion / wordCount : 0;

  logSh(`🔍 Connecteurs formels détectés: ${detectedConnectors.length} (score: ${suspicionScore.toFixed(3)})`, 'DEBUG');

  return {
    count: detectedConnectors.length,
    connectors: detectedConnectors.map(c => c.connector),
    detailedConnectors: detectedConnectors,
    suspicionScore,
    recommendation: suspicionScore > 0.03 ? 'humanize' : 'minimal_changes'
  };
}

/**
 * ANALYSE DENSITÉ CONNECTEURS FORMELS
 */
function analyzeConnectorFormality(text) {
  const detection = detectFormalConnectors(text);
  const sentences = text.split(/[.!?]+/).filter(s => s.trim().length > 0);
  
  const density = detection.count / sentences.length;
  const formalityLevel = density > 0.4 ? 'high' : density > 0.2 ? 'medium' : 'low';
  
  return {
    connectorsCount: detection.count,
    sentenceCount: sentences.length,
    density,
    formalityLevel,
    suspicionScore: detection.suspicionScore,
    recommendation: formalityLevel === 'high' ? 'extensive_humanization' : 
                    formalityLevel === 'medium' ? 'selective_humanization' : 'minimal_humanization'
  };
}

// ============= EXPORTS =============
module.exports = {
  humanizeTransitions,
  replaceFormalConnectors,
  humanizeFormalStarts,
  replaceArtificialTransitions,
  addContextualVariability,
  detectFormalConnectors,
  analyzeConnectorFormality,
  FORMAL_CONNECTORS,
  NATURAL_CONNECTORS_BY_CONTEXT
};