Analytics & Optimization Agent

async analyzeVideoPerformance(videoId) {
  this.logger.info(`Analyzing performance for video: ${videoId}`);
  
  // Get video details
  const videoDetails = await this.getVideoDetails(videoId);
  
  // Get analytics data
  const analytics = await this.getVideoAnalytics(videoId);
  
  // Analyze thumbnail performance
  const thumbnailMetrics = await this.analyzeThumbnailPerformance(videoId);
  
  // Analyze title and SEO performance
  const seoMetrics = await this.analyzeSEOPerformance(videoDetails, analytics);
  
  // Generate insights and recommendations
  const insights = await this.generateInsights(
    videoDetails, analytics, thumbnailMetrics, seoMetrics
  );
  
  const performanceReport = {
    videoId,
    videoDetails,
    analytics,
    thumbnailMetrics,
    seoMetrics,
    insights,
    performance: this.calculatePerformanceScore(analytics),
    analyzedAt: new Date().toISOString()
  };
  
  // Store in performance data
  this.performanceData.set(videoId, performanceReport);
  
  // Save to database
  await this.db.saveAnalyticsReport(performanceReport);
  
  this.logger.info(`Analysis complete. Performance score: ${performanceReport.performance.score}/100`);
  return performanceReport;
}

async getVideoAnalytics(videoId) {
  const endDate = new Date().toISOString().split('T')[0];
  const startDate = new Date(Date.now() - 30 * 24 * 60 * 60 * 1000)
    .toISOString().split('T')[0];
  
  try {
    // Get various analytics metrics
    const [
      viewsData,
      watchTimeData,
      demographicsData,
      trafficSourcesData,
      deviceData
    ] = await Promise.all([
      this.getViewsAnalytics(videoId, startDate, endDate),
      this.getWatchTimeAnalytics(videoId, startDate, endDate),
      this.getDemographicsAnalytics(videoId, startDate, endDate),
      this.getTrafficSourcesAnalytics(videoId, startDate, endDate),
      this.getDeviceAnalytics(videoId, startDate, endDate)
    ]);
    
    return {
      period: { startDate, endDate },
      views: viewsData,
      watchTime: watchTimeData,
      demographics: demographicsData,
      trafficSources: trafficSourcesData,
      devices: deviceData,
      engagement: await this.calculateEngagementMetrics(videoId)
    };
  } catch (error) {
    this.logger.error(`Failed to get analytics for ${videoId}:`, error);
    return this.getSimulatedAnalytics(videoId);
  }
}

calculatePerformanceScore(analytics) {
  let score = 0;
  let maxScore = 0;
  
  // Views score (30 points max)
  const viewsScore = Math.min(30, (analytics.views.totalViews / 10000) * 30);
  score += viewsScore;
  maxScore += 30;
  
  // Retention score (25 points max)
  const retentionScore = (analytics.watchTime.averageViewPercentage / 100) * 25;
  score += retentionScore;
  maxScore += 25;
  
  // Engagement score (25 points max)
  const engagementScore = Math.min(25, analytics.engagement.engagementRate * 5);
  score += engagementScore;
  maxScore += 25;
  
  // CTR score (20 points max)
  const ctrScore = Math.min(20, analytics.views.averageCTR * 2);
  score += ctrScore;
  maxScore += 20;
  
  const finalScore = Math.round((score / maxScore) * 100);
  
  return {
    score: finalScore,
    breakdown: {
      views: Math.round(viewsScore),
      retention: Math.round(retentionScore),
      engagement: Math.round(engagementScore),
      ctr: Math.round(ctrScore)
    },
    grade: this.getPerformanceGrade(finalScore)
  };
}

async generateInsights(videoDetails, analytics, thumbnailMetrics, seoMetrics) {
  const insights = [];
  
  // Performance insights
  if (analytics.views.totalViews > 10000) {
    insights.push({
      type: 'success',
      category: 'views',
      message: 'Video is performing above average in terms of views',
      impact: 'high'
    });
  } else if (analytics.views.totalViews < 1000) {
    insights.push({
      type: 'warning',
      category: 'views',
      message: 'Video views are below expected threshold',
      impact: 'high',
      recommendation: 'Consider promoting the video or optimizing SEO'
    });
  }
  
  // Retention insights
  if (analytics.watchTime.averageViewPercentage > 50) {
    insights.push({
      type: 'success',
      category: 'retention',
      message: 'Excellent audience retention rate',
      impact: 'medium'
    });
  } else if (analytics.watchTime.averageViewPercentage < 30) {
    insights.push({
      type: 'critical',
      category: 'retention',
      message: 'Poor audience retention - viewers are dropping off early',
      impact: 'high',
      recommendation: 'Review content structure and pacing'
    });
  }
  
  // Thumbnail insights
  if (thumbnailMetrics.clickThroughRate > 8) {
    insights.push({
      type: 'success',
      category: 'thumbnail',
      message: 'Thumbnail is highly effective at driving clicks',
      impact: 'high'
    });
  } else if (thumbnailMetrics.clickThroughRate < 3) {
    insights.push({
      type: 'warning',
      category: 'thumbnail',
      message: 'Thumbnail may not be compelling enough',
      impact: 'high',
      recommendation: 'Consider A/B testing different thumbnail designs'
    });
  }
  
  // SEO insights
  if (seoMetrics.overallSEOScore > 80) {
    insights.push({
      type: 'success',
      category: 'seo',
      message: 'Video is well-optimized for search',
      impact: 'medium'
    });
  } else if (seoMetrics.overallSEOScore < 50) {
    insights.push({
      type: 'warning',
      category: 'seo',
      message: 'SEO optimization needs improvement',
      impact: 'medium',
      recommendation: 'Optimize title, description, and tags'
    });
  }
  
  return insights;
}

async analyzeSEOPerformance(videoDetails, analytics) {
  const title = videoDetails.title;
  const description = videoDetails.description;
  const tags = videoDetails.tags;
  
  // Analyze title effectiveness
  const titleScore = this.scoreTitleEffectiveness(title, analytics.views.totalViews);
  
  // Analyze description optimization
  const descriptionScore = this.scoreDescriptionOptimization(description);
  
  // Analyze tag relevance
  const tagScore = this.scoreTagRelevance(tags, title);
  
  // Search performance
  const searchPerformance = this.analyzeSearchPerformance(analytics.trafficSources);
  
  return {
    titleScore,
    descriptionScore,
    tagScore,
    searchPerformance,
    overallSEOScore: Math.round((titleScore + descriptionScore + tagScore) / 3),
    recommendations: this.generateSEORecommendations(
      titleScore, descriptionScore, tagScore, searchPerformance
    )
  };
}

async analyzeThumbnailPerformance(videoId) {
  try {
    const response = await this.youtubeAnalytics.reports.query({
      ids: 'channel==MINE',
      startDate: new Date(Date.now() - 7 * 24 * 60 * 60 * 1000).toISOString().split('T')[0],
      endDate: new Date().toISOString().split('T')[0],
      metrics: 'impressions,impressionClickThroughRate',
      filters: `video==${videoId}`
    });
    
    const data = response.data.rows?.[0] || [0, 0];
    const ctr = data[1] || 0;
    
    return {
      impressions: data[0] || 0,
      clickThroughRate: ctr,
      ctrQuality: this.assessCTRQuality(ctr),
      recommendations: this.generateThumbnailRecommendations(ctr)
    };
  } catch (error) {
    return {
      impressions: 0,
      clickThroughRate: 0,
      ctrQuality: 'unknown',
      recommendations: ['Unable to analyze thumbnail performance']
    };
  }
}

async getRecentAnalytics(days = 7) {
  const recentReports = Array.from(this.performanceData.values())
    .filter(report => {
      const reportDate = new Date(report.analyzedAt);
      const cutoffDate = new Date(Date.now() - days * 24 * 60 * 60 * 1000);
      return reportDate > cutoffDate;
    })
    .sort((a, b) => new Date(b.analyzedAt) - new Date(a.analyzedAt));
  
  return {
    totalVideos: recentReports.length,
    averagePerformanceScore: this.calculateAverageScore(recentReports),
    topPerformers: recentReports.slice(0, 5),
    insights: this.generateChannelInsights(recentReports)
  };
}