Best FullStory Digital Experience Analytics Phone Validation API & Email Verification Integration 2025

// Enhanced FullStory integration with 1lookup validation
// Initialize FullStory
window['_fs_debug'] = false;
window['_fs_host'] = 'fullstory.com';
window['_fs_script'] = 'edge.fullstory.com/s/fs.js';
window['_fs_org'] = 'YOUR_FULLSTORY_ORG_ID';
window['_fs_namespace'] = 'FS';

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  if (e in m) {if(m.console && m.console.log) { m.console.log('FullStory namespace conflict. Please set window["_fs_namespace"].');} return;}
  g=m[e]=function(a,b,s){g.q?g.q.push([a,b,s]):g._api(a,b,s);};g.q=[];
  o=n.createElement(t);o.async=1;o.crossOrigin='anonymous';o.src='https://'+_fs_script;
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  g.identify=function(i,v,s){g(l,{uid:i},s);if(v)g(l,v,s)};g.event=function(i,v,s){g('event',{n:i,p:v},s)};
  g.anonymize=function(){g.identify(!!0)};
  g.shutdown=function(){g("rec",!1)};g.restart=function(){g("rec",!0)};
  g.log = function(a,b){g("log",[a,b])};
  g.consent=function(a){g("consent",!arguments.length||a)};
  g.identifyAccount=function(i,v){o='account';v=v||{};v.acctId=i;g(o,v)};
  g.clearUserCookie=function(){};
  g.setVars=function(n, p){g('setVars',[n,p]);};
  g._w={};y='XMLHttpRequest';g._w[y]=m[y];y='fetch';g._w[y]=m[y];
  if(m[y])m[y]=function(){return g._w[y].apply(this,arguments)};
  g._v="1.3.0";
})(window,document,window['_fs_namespace'],'script','user');

// Enhanced user identification with contact validation
window.identifyFullStoryUserWithValidation = async function(userId, userProperties) {
  try {
    // Validate user contact information if present
    if (userProperties.email || userProperties.phone) {
      const validationData = await validateUserContactForFullStory({
        phone: userProperties.phone,
        email: userProperties.email
      });
      
      // Enhance user properties with validation results
      const enhancedProperties = {
        ...userProperties,
        // Phone validation properties
        phone_validation_status: validationData.phone?.is_valid ? 'valid' : 'invalid',
        phone_carrier: validationData.phone?.carrier_details?.name || '',
        phone_line_type: validationData.phone?.carrier_details?.type || '',
        phone_country: validationData.phone?.location_details?.country || '',
        phone_region: validationData.phone?.location_details?.region || '',
        phone_risk_level: validationData.phone?.risk_assessment?.risk_level || '',
        // Email validation properties
        email_validation_status: validationData.email?.is_valid ? 'valid' : 'invalid',
        email_deliverability: validationData.email?.deliverability?.status || '',
        email_domain_type: validationData.email?.domain_details?.type || '',
        email_risk_level: validationData.email?.risk_assessment?.risk_level || '',
        // Digital experience specific enhancements
        user_quality_score: calculateDXUserQualityScore(validationData),
        user_quality_tier: determineDXUserTier(validationData),
        is_verified_user: isVerifiedDXUser(validationData),
        session_validation_timestamp: new Date().toISOString(),
        // FullStory-specific properties
        fullstory_user_validation_version: '2025.1',
        dx_research_segment: determineDXResearchSegment(validationData),
        session_replay_priority: calculateSessionPriority(validationData)
      };
      
      // Identify user with enhanced properties in FullStory
      FS.identify(userId, enhancedProperties);
      
      // Set custom user vars for advanced segmentation
      FS.setVars('user', {
        contactQuality: enhancedProperties.user_quality_score,
        userTier: enhancedProperties.user_quality_tier,
        validationStatus: enhancedProperties.is_verified_user ? 'verified' : 'unverified',
        sessionPriority: enhancedProperties.session_replay_priority
      });
      
      // Track validation event for digital experience analytics
      FS.event('User Contact Validated', {
        validation_type: 'dx_enhancement',
        phone_valid: validationData.phone?.is_valid,
        email_valid: validationData.email?.is_valid,
        quality_score: enhancedProperties.user_quality_score
      });
      
    } else {
      // Standard identification without validation
      FS.identify(userId, userProperties);
    }
    
  } catch (error) {
    console.error('FullStory user validation error:', error);
    // Fallback to standard identification
    FS.identify(userId, {
      ...userProperties,
      validation_error: true,
      validation_error_message: error.message
    });
  }
};

// Contact validation function optimized for digital experience
async function validateUserContactForFullStory(contactData) {
  const response = await fetch('https://app.1lookup.io/api/v1/validate', {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer YOUR_1LOOKUP_API_KEY',
      'Content-Type': 'application/json',
      'X-Integration': 'fullstory-dx'
    },
    body: JSON.stringify({
      ...contactData,
      include_carrier_details: true,
      include_location_details: true,
      include_risk_assessment: true,
      dx_context: true
    })
  });
  
  if (!response.ok) {
    throw new Error(`DX validation failed: ${response.status}`);
  }
  
  return await response.json();
}

// Calculate DX-specific user quality score
function calculateDXUserQualityScore(validationData) {
  let score = 0;
  
  // Email scoring for digital experience
  if (validationData.email?.is_valid) score += 40;
  if (validationData.email?.deliverability?.status === 'deliverable') score += 15;
  
  // Phone scoring for digital experience
  if (validationData.phone?.is_valid) score += 35;
  if (validationData.phone?.risk_assessment?.risk_level === 'low') score += 10;
  
  return Math.min(100, score);
}

// Determine digital experience user tier
function determineDXUserTier(validationData) {
  const qualityScore = calculateDXUserQualityScore(validationData);
  
  if (qualityScore >= 80) return 'premium_dx_user';
  if (qualityScore >= 60) return 'high_value_dx_user';
  if (qualityScore >= 40) return 'standard_dx_user';
  return 'basic_dx_user';
}

// Calculate session replay priority based on user quality
function calculateSessionPriority(validationData) {
  const qualityScore = calculateDXUserQualityScore(validationData);
  
  if (qualityScore >= 80) return 'high';
  if (qualityScore >= 60) return 'medium';
  return 'standard';
}

// Enhanced FullStory server-side integration with contact validation
const axios = require('axios');

class FullStoryDXEnhancer {
  constructor(fullstoryOrgId, lookupApiKey) {
    this.fullstoryOrgId = fullstoryOrgId;
    this.lookupApiKey = lookupApiKey;
    this.sessionCache = new Map();
  }
  
  async enhanceSessionWithValidation(sessionId, userId, sessionData, userContext) {
    try {
      // Validate user contact information
      const userValidation = await this.validateUserForDX(userContext);
      
      // Calculate session quality metrics
      const sessionQuality = this.calculateSessionQuality(sessionData, userValidation);
      
      // Enhanced session context
      const enhancedSessionContext = {
        session_id: sessionId,
        user_id: userId,
        // User validation context
        user_quality_score: userValidation.quality_score,
        user_verification_level: userValidation.verification_level,
        contact_validation_status: userValidation.contact_status,
        user_authenticity_score: userValidation.authenticity_score,
        // Session quality metrics
        session_quality_score: sessionQuality.overall_score,
        session_reliability: sessionQuality.reliability,
        session_value_tier: sessionQuality.value_tier,
        is_high_value_session: sessionQuality.is_high_value,
        // Digital experience insights
        dx_interaction_quality: sessionQuality.interaction_quality,
        user_engagement_score: sessionQuality.engagement_score,
        session_conversion_potential: sessionQuality.conversion_potential,
        // Geographic and behavioral context
        user_geographic_region: userValidation.region,
        device_trust_score: sessionQuality.device_trust,
        session_anomaly_score: sessionQuality.anomaly_score,
        // FullStory-specific context
        session_replay_priority: sessionQuality.replay_priority,
        funnel_analysis_weight: sessionQuality.funnel_weight,
        experience_optimization_value: sessionQuality.optimization_value
      };
      
      // Send enhanced context to FullStory via API or custom vars
      await this.updateFullStorySession(sessionId, enhancedSessionContext);
      
      // Track session enhancement analytics
      await this.trackSessionEnhancementAnalytics(sessionId, sessionQuality, userValidation);
      
      // Cache enhanced session data
      this.sessionCache.set(sessionId, enhancedSessionContext);
      
      return enhancedSessionContext;
      
    } catch (error) {
      console.error('FullStory session enhancement error:', error);
      
      // Track error but continue session recording
      return {
        session_id: sessionId,
        enhancement_error: true,
        error_details: error.message
      };
    }
  }
  
  async validateUserForDX(userContext) {
    try {
      const contactData = {
        phone: userContext.phone,
        email: userContext.email
      };
      
      if (!contactData.phone && !contactData.email) {
        return this.getDefaultDXValidation();
      }
      
      const response = await axios.post('https://app.1lookup.io/api/v1/validate', contactData, {
        headers: {
          'Authorization': `Bearer ${this.lookupApiKey}`,
          'Content-Type': 'application/json',
          'X-Integration': 'fullstory-server'
        }
      });
      
      const validation = response.data;
      
      return {
        quality_score: this.calculateDXQualityScore(validation),
        verification_level: this.getDXVerificationLevel(validation),
        contact_status: this.getDXContactStatus(validation),
        authenticity_score: this.calculateDXAuthenticity(validation),
        phone_verified: validation.phone?.is_valid,
        email_verified: validation.email?.is_valid,
        fraud_risk_level: validation.fraud_risk_level,
        region: validation.phone?.location_details?.region,
        country: validation.phone?.location_details?.country
      };
      
    } catch (error) {
      console.error('DX user validation error:', error);
      return this.getDefaultDXValidation();
    }
  }
  
  calculateSessionQuality(sessionData, userValidation) {
    let overallScore = 0;
    let reliability = 0;
    let interactionQuality = 0;
    
    // Base score from user validation
    const userQuality = userValidation.quality_score || 0;
    overallScore = userQuality * 0.4; // 40% weight from user quality
    
    // Session behavioral indicators
    const sessionMetrics = this.analyzeDXSessionBehavior(sessionData);
    overallScore += sessionMetrics.behavior_score * 0.3; // 30% from behavior
    
    // User verification impact
    if (userValidation.phone_verified) overallScore += 15;
    if (userValidation.email_verified) overallScore += 15;
    
    // Calculate reliability score
    reliability = this.calculateDXSessionReliability(userValidation, sessionMetrics);
    
    // Calculate interaction quality
    interactionQuality = this.calculateDXInteractionQuality(
      sessionMetrics, 
      userValidation
    );
    
    // Determine session value tier
    const valueTier = this.determineDXSessionValueTier(overallScore, reliability);
    
    return {
      overall_score: Math.min(100, overallScore),
      reliability: Math.min(100, reliability),
      value_tier: valueTier,
      is_high_value: overallScore >= 70 && reliability >= 80,
      interaction_quality: Math.min(100, interactionQuality),
      engagement_score: sessionMetrics.engagement_score,
      conversion_potential: this.calculateConversionPotential(userValidation, sessionMetrics),
      device_trust: this.calculateDXDeviceTrust(sessionData, userValidation),
      anomaly_score: this.calculateDXSessionAnomalyScore(sessionMetrics),
      replay_priority: this.calculateReplayPriority(overallScore, sessionMetrics),
      funnel_weight: this.calculateFunnelWeight(userValidation),
      optimization_value: this.calculateOptimizationValue(overallScore, sessionMetrics)
    };
  }
  
  async updateFullStorySession(sessionId, enhancedContext) {
    // Use FullStory's server API to enhance session data
    // This would typically involve setting custom user vars or session properties
    try {
      // Example: Update user properties via FullStory API
      const fullstoryApiUrl = `https://api.fullstory.com/v1/sessions/${sessionId}/properties`;
      
      await axios.put(fullstoryApiUrl, {
        sessionProperties: {
          userQualityScore: enhancedContext.user_quality_score,
          sessionQuality: enhancedContext.session_quality_score,
          verificationLevel: enhancedContext.user_verification_level,
          replayPriority: enhancedContext.session_replay_priority
        }
      }, {
        headers: {
          'Authorization': `Bearer YOUR_FULLSTORY_API_TOKEN`,
          'Content-Type': 'application/json'
        }
      });
      
    } catch (error) {
      console.error('FullStory session update error:', error);
      // Continue without failing the enhancement
    }
  }
}

// Advanced session replay prioritization with user quality intelligence
class FullStorySessionPrioritizer {
  constructor(lookupApiKey) {
    this.lookupApiKey = lookupApiKey;
    this.sessionQueue = new Map();
    this.priorityThresholds = {
      critical: 85,
      high: 70,
      medium: 50,
      low: 0
    };
  }
  
  async prioritizeSessionReplay(sessionId, userId, sessionMetrics, userContext) {
    try {
      // Get or validate user quality data
      const userValidation = await this.getUserValidationForSession(userId, userContext);
      
      // Calculate comprehensive session priority
      const sessionPriority = this.calculateComprehensiveSessionPriority(
        sessionMetrics,
        userValidation
      );
      
      // Enhanced session replay context
      const enhancedSessionData = {
        session_id: sessionId,
        user_id: userId,
        // Priority and quality metrics
        priority_score: sessionPriority.overall_score,
        priority_tier: sessionPriority.tier,
        replay_urgency: sessionPriority.urgency,
        analysis_importance: sessionPriority.importance,
        // User quality context
        user_quality_score: userValidation.quality_score,
        user_verification_status: userValidation.verification_status,
        user_authenticity_level: userValidation.authenticity_level,
        contact_validation_confidence: userValidation.confidence,
        // Session characteristics
        session_type: sessionPriority.session_type,
        interaction_depth: sessionPriority.interaction_depth,
        conversion_indicators: sessionPriority.conversion_indicators,
        friction_points: sessionPriority.friction_points,
        // Experience optimization value
        optimization_potential: sessionPriority.optimization_potential,
        research_value: sessionPriority.research_value,
        bug_detection_likelihood: sessionPriority.bug_likelihood,
        // Quality and trust indicators
        session_authenticity: sessionPriority.authenticity,
        data_reliability: sessionPriority.reliability,
        analysis_confidence: sessionPriority.analysis_confidence
      };
      
      // Apply session replay tags based on priority
      const replayTags = this.generateSessionReplayTags(sessionPriority, userValidation);
      
      // Update FullStory with enhanced session context
      FS.setVars('session', {
        priorityScore: enhancedSessionData.priority_score,
        priorityTier: enhancedSessionData.priority_tier,
        userQuality: enhancedSessionData.user_quality_score,
        optimizationPotential: enhancedSessionData.optimization_potential
      });
      
      // Apply replay tags for filtering and analysis
      replayTags.forEach(tag => {
        FS.event('Session Tag', { tag: tag });
      });
      
      // Track session prioritization analytics
      FS.event('Session Prioritized', {
        session_id: sessionId,
        priority_score: sessionPriority.overall_score,
        priority_tier: sessionPriority.tier,
        user_quality: userValidation.quality_score,
        optimization_value: sessionPriority.optimization_potential
      });
      
      // Queue session for appropriate analysis workflow
      this.queueSessionForAnalysis(sessionId, enhancedSessionData);
      
      return enhancedSessionData;
      
    } catch (error) {
      console.error('Session prioritization error:', error);
      return this.getDefaultSessionPriority(sessionId);
    }
  }
  
  calculateComprehensiveSessionPriority(sessionMetrics, userValidation) {
    let overallScore = 0;
    let urgency = 'standard';
    let importance = 'medium';
    
    // User quality contribution (30%)
    const userQuality = userValidation.quality_score || 0;
    overallScore += userQuality * 0.3;
    
    // Session behavioral contribution (40%)
    const behaviorScore = this.calculateSessionBehaviorScore(sessionMetrics);
    overallScore += behaviorScore * 0.4;
    
    // Business value contribution (30%)
    const businessValue = this.calculateBusinessValueScore(sessionMetrics, userValidation);
    overallScore += businessValue * 0.3;
    
    // Determine priority tier
    let tier = 'low';
    if (overallScore >= this.priorityThresholds.critical) tier = 'critical';
    else if (overallScore >= this.priorityThresholds.high) tier = 'high';
    else if (overallScore >= this.priorityThresholds.medium) tier = 'medium';
    
    // Calculate urgency based on session characteristics
    urgency = this.calculateSessionUrgency(sessionMetrics, userValidation);
    
    // Calculate importance based on optimization potential
    importance = this.calculateSessionImportance(sessionMetrics, userValidation);
    
    return {
      overall_score: Math.min(100, overallScore),
      tier: tier,
      urgency: urgency,
      importance: importance,
      session_type: this.classifySessionType(sessionMetrics),
      interaction_depth: this.calculateInteractionDepth(sessionMetrics),
      conversion_indicators: this.detectConversionIndicators(sessionMetrics),
      friction_points: this.identifyFrictionPoints(sessionMetrics),
      optimization_potential: this.calculateOptimizationPotential(sessionMetrics, userValidation),
      research_value: this.calculateResearchValue(sessionMetrics, userValidation),
      bug_likelihood: this.calculateBugDetectionLikelihood(sessionMetrics),
      authenticity: this.calculateSessionAuthenticity(userValidation, sessionMetrics),
      reliability: this.calculateSessionReliability(userValidation, sessionMetrics),
      analysis_confidence: this.calculateAnalysisConfidence(userValidation, sessionMetrics)
    };
  }
  
  calculateSessionBehaviorScore(sessionMetrics) {
    let score = 0;
    
    // Session duration scoring
    const duration = sessionMetrics.duration || 0;
    if (duration > 300) score += 25; // 5+ minutes
    else if (duration > 120) score += 15; // 2+ minutes
    else if (duration > 30) score += 10; // 30+ seconds
    
    // Interaction depth scoring
    const interactions = sessionMetrics.interactions || 0;
    if (interactions > 20) score += 25; // High interaction
    else if (interactions > 10) score += 15; // Medium interaction
    else if (interactions > 3) score += 10; // Basic interaction
    
    // Page depth scoring
    const pageViews = sessionMetrics.page_views || 0;
    if (pageViews > 5) score += 20; // Deep navigation
    else if (pageViews > 2) score += 15; // Multi-page
    else if (pageViews > 1) score += 10; // Some navigation
    
    // Error and friction indicators
    if (sessionMetrics.has_errors) score += 30; // Errors are high priority
    if (sessionMetrics.has_rage_clicks) score += 25; // Rage clicks indicate friction
    if (sessionMetrics.form_abandonment) score += 20; // Form issues
    
    return Math.min(100, score);
  }
  
  generateSessionReplayTags(sessionPriority, userValidation) {
    const tags = [];
    
    // Priority tags
    tags.push(`priority-${sessionPriority.tier}`);
    tags.push(`urgency-${sessionPriority.urgency}`);
    
    // User quality tags
    const qualityTier = userValidation.quality_score >= 80 ? 'high' :
                        userValidation.quality_score >= 60 ? 'medium' : 'low';
    tags.push(`user-quality-${qualityTier}`);
    
    // Verification status tags
    if (userValidation.phone_verified) tags.push('phone-verified');
    if (userValidation.email_verified) tags.push('email-verified');
    
    // Session type tags
    tags.push(`session-type-${sessionPriority.session_type}`);
    
    // Business value tags
    if (sessionPriority.optimization_potential >= 80) tags.push('high-optimization-potential');
    if (sessionPriority.research_value >= 75) tags.push('high-research-value');
    if (sessionPriority.bug_likelihood >= 70) tags.push('potential-bug');
    
    // Geographic tags
    if (userValidation.country) {
      tags.push(`country-${userValidation.country.toLowerCase()}`);
    }
    
    return tags;
  }
  
  queueSessionForAnalysis(sessionId, sessionData) {
    // Queue sessions based on priority for different analysis workflows
    const queueKey = `${sessionData.priority_tier}-${Date.now()}`;
    
    this.sessionQueue.set(queueKey, {
      session_id: sessionId,
      priority_tier: sessionData.priority_tier,
      priority_score: sessionData.priority_score,
      analysis_type: this.determineAnalysisType(sessionData),
      queued_at: new Date().toISOString(),
      expected_analysis_time: this.estimateAnalysisTime(sessionData)
    });
    
    // Trigger appropriate analysis workflow
    this.triggerAnalysisWorkflow(sessionData);
  }
}

// Advanced conversion funnel analysis with user quality intelligence
class FullStoryFunnelAnalyzer {
  constructor(fullstoryOrgId, lookupApiKey) {
    this.fullstoryOrgId = fullstoryOrgId;
    this.lookupApiKey = lookupApiKey;
    this.funnelCache = new Map();
    this.qualitySegments = {
      premium: { min: 80, max: 100 },
      high: { min: 60, max: 79 },
      standard: { min: 40, max: 59 },
      basic: { min: 0, max: 39 }
    };
  }
  
  async analyzeFunnelWithUserQuality(funnelId, funnelSteps, timeframe) {
    try {
      // Get funnel session data from FullStory
      const funnelSessions = await this.getFunnelSessionData(funnelId, timeframe);
      
      // Enhance sessions with user validation data
      const enhancedSessions = await this.enhanceSessionsWithValidation(funnelSessions);
      
      // Perform quality-segmented funnel analysis
      const segmentedAnalysis = await this.performSegmentedFunnelAnalysis(
        enhancedSessions,
        funnelSteps
      );
      
      // Calculate optimization opportunities
      const optimizationOpportunities = this.identifyOptimizationOpportunities(
        segmentedAnalysis
      );
      
      // Generate comprehensive funnel insights
      const funnelInsights = {
        funnel_id: funnelId,
        analysis_timeframe: timeframe,
        total_sessions: enhancedSessions.length,
        // Quality segment breakdown
        quality_segments: segmentedAnalysis.segments,
        overall_conversion_rates: segmentedAnalysis.conversion_rates,
        quality_weighted_conversion: segmentedAnalysis.weighted_conversion,
        // Step-by-step analysis
        step_analysis: segmentedAnalysis.step_breakdown,
        friction_points: segmentedAnalysis.friction_points,
        quality_based_friction: segmentedAnalysis.quality_friction,
        // Optimization insights
        optimization_opportunities: optimizationOpportunities,
        recommended_actions: this.generateActionRecommendations(segmentedAnalysis),
        expected_impact: this.calculateExpectedImpact(optimizationOpportunities),
        // Data quality metrics
        analysis_confidence: segmentedAnalysis.confidence_score,
        data_reliability: segmentedAnalysis.reliability_score
      };
      
      // Track funnel analysis event in FullStory
      FS.event('Funnel Analysis Completed', {
        funnel_id: funnelId,
        total_sessions: funnelInsights.total_sessions,
        overall_conversion: segmentedAnalysis.conversion_rates.overall,
        quality_weighted_conversion: segmentedAnalysis.weighted_conversion,
        optimization_opportunities: optimizationOpportunities.length
      });
      
      return funnelInsights;
      
    } catch (error) {
      console.error('Funnel analysis error:', error);
      return { error: error.message, funnel_id: funnelId };
    }
  }
  
  async enhanceSessionsWithValidation(sessions) {
    const enhancedSessions = [];
    
    for (const session of sessions) {
      try {
        // Extract user contact information from session
        const userContact = this.extractContactFromSession(session);
        
        if (userContact.phone || userContact.email) {
          // Validate user contact
          const validation = await this.validateSessionUser(userContact);
          
          // Enhance session with validation data
          const enhancedSession = {
            ...session,
            // User quality metrics
            user_quality_score: this.calculateSessionUserQuality(validation),
            user_quality_segment: this.determineQualitySegment(validation),
            user_verification_status: this.getSessionVerificationStatus(validation),
            // Contact validation details
            phone_validated: validation.phone?.is_valid,
            email_validated: validation.email?.is_valid,
            contact_risk_level: this.getSessionContactRisk(validation),
            // Behavioral quality indicators
            session_authenticity: this.calculateSessionAuthenticity(validation, session),
            interaction_reliability: this.calculateInteractionReliability(validation, session),
            conversion_potential: this.calculateSessionConversionPotential(validation, session),
            // Geographic and demographic context
            user_country: validation.phone?.location_details?.country,
            user_region: validation.phone?.location_details?.region,
            carrier_type: validation.phone?.carrier_details?.type
          };
          
          enhancedSessions.push(enhancedSession);
        } else {
          // Add session without validation
          enhancedSessions.push({
            ...session,
            user_quality_score: 0,
            user_quality_segment: 'unverified',
            user_verification_status: 'no_contact_info'
          });
        }
        
      } catch (error) {
        console.error('Session enhancement error:', error);
        // Add session with error flag
        enhancedSessions.push({
          ...session,
          validation_error: true,
          user_quality_score: 0,
          user_quality_segment: 'error'
        });
      }
    }
    
    return enhancedSessions;
  }
  
  performSegmentedFunnelAnalysis(enhancedSessions, funnelSteps) {
    const segments = {};
    const stepBreakdown = {};
    const frictionPoints = [];
    
    // Initialize segments
    Object.keys(this.qualitySegments).forEach(segment => {
      segments[segment] = {
        name: segment,
        sessions: [],
        conversion_rate: 0,
        step_completion_rates: {},
        friction_points: []
      };
    });
    
    // Segment sessions by quality
    enhancedSessions.forEach(session => {
      const segment = session.user_quality_segment;
      if (segments[segment]) {
        segments[segment].sessions.push(session);
      }
    });
    
    // Analyze each segment
    Object.keys(segments).forEach(segmentKey => {
      const segment = segments[segmentKey];
      
      if (segment.sessions.length > 0) {
        // Calculate segment conversion rates
        segment.conversion_rate = this.calculateSegmentConversionRate(
          segment.sessions,
          funnelSteps
        );
        
        // Calculate step completion rates for segment
        segment.step_completion_rates = this.calculateStepCompletionRates(
          segment.sessions,
          funnelSteps
        );
        
        // Identify segment-specific friction points
        segment.friction_points = this.identifySegmentFrictionPoints(
          segment.sessions,
          funnelSteps
        );
      }
    });
    
    // Calculate overall metrics
    const overallConversionRate = this.calculateOverallConversionRate(enhancedSessions, funnelSteps);
    const qualityWeightedConversion = this.calculateQualityWeightedConversion(segments);
    
    // Identify cross-segment friction points
    const crossSegmentFriction = this.identifyCrossSegmentFriction(segments, funnelSteps);
    
    return {
      segments: segments,
      conversion_rates: {
        overall: overallConversionRate,
        by_segment: Object.keys(segments).reduce((acc, key) => {
          acc[key] = segments[key].conversion_rate;
          return acc;
        }, {})
      },
      weighted_conversion: qualityWeightedConversion,
      step_breakdown: this.generateStepBreakdown(segments, funnelSteps),
      friction_points: crossSegmentFriction,
      quality_friction: this.analyzeQualityBasedFriction(segments),
      confidence_score: this.calculateAnalysisConfidence(enhancedSessions),
      reliability_score: this.calculateAnalysisReliability(segments)
    };
  }
  
  identifyOptimizationOpportunities(segmentedAnalysis) {
    const opportunities = [];
    
    // Analyze high-quality user friction
    const premiumSegment = segmentedAnalysis.segments.premium;
    const highSegment = segmentedAnalysis.segments.high;
    
    if (premiumSegment.friction_points.length > 0) {
      opportunities.push({
        type: 'premium_user_friction',
        priority: 'high',
        description: 'Address friction points affecting premium quality users',
        affected_segment: 'premium',
        friction_points: premiumSegment.friction_points,
        estimated_impact: this.estimateImpact(premiumSegment, 'high'),
        recommended_actions: this.generateFrictionActions(premiumSegment.friction_points)
      });
    }
    
    // Analyze conversion rate gaps between segments
    const conversionGap = premiumSegment.conversion_rate - segmentedAnalysis.segments.standard.conversion_rate;
    if (conversionGap > 0.15) { // 15% gap
      opportunities.push({
        type: 'quality_conversion_gap',
        priority: 'medium',
        description: 'Significant conversion rate gap between user quality segments',
        gap_percentage: conversionGap * 100,
        optimization_potential: this.calculateGapOptimizationPotential(conversionGap),
        recommended_actions: ['Analyze premium user paths', 'Apply insights to standard users']
      });
    }
    
    // Analyze step-specific opportunities
    segmentedAnalysis.step_breakdown.forEach(step => {
      if (step.quality_variance > 0.2) { // 20% variance between segments
        opportunities.push({
          type: 'step_quality_variance',
          priority: 'medium',
          step_name: step.name,
          description: `High variance in completion rates across quality segments for ${step.name}`,
          variance: step.quality_variance,
          recommended_actions: [`Optimize ${step.name} for all user segments`]
        });
      }
    });
    
    return opportunities;
  }
}