smartui-migration-tool/lib/simple-commands/ai-code-analyzer.js

Enterprise-grade CLI tool for migrating visual testing platforms to LambdaTest SmartUI

const { Command, Flags } = require('@oclif/core');
const chalk = require('chalk');
const fs = require('fs-extra');
const path = require('path');
const glob = require('glob');

class AICodeAnalyzer extends Command {
  static description = 'AI-powered code analysis with machine learning insights and predictions';

  static flags = {
    path: Flags.string({
      char: 'p',
      description: 'Path to analyze (default: current directory)',
      default: process.cwd()
    }),
    include: Flags.string({
      char: 'i',
      description: 'File patterns to include (comma-separated)',
      default: '**/*.{js,ts,jsx,tsx,py,java,cs}'
    }),
    exclude: Flags.string({
      char: 'e',
      description: 'File patterns to exclude (comma-separated)',
      default: 'node_modules/**,dist/**,build/**,*.min.js'
    }),
    analysis: Flags.string({
      char: 'a',
      description: 'Type of analysis to perform',
      options: ['performance', 'security', 'quality', 'maintainability', 'all'],
      default: 'all'
    }),
    model: Flags.string({
      char: 'm',
      description: 'AI model to use for analysis',
      options: ['gpt-4', 'claude-3', 'local', 'ensemble'],
      default: 'ensemble'
    }),
    confidence: Flags.integer({
      char: 'c',
      description: 'Minimum confidence threshold (0-100)',
      default: 70
    }),
    output: Flags.string({
      char: 'o',
      description: 'Output file for analysis results',
      default: 'ai-analysis.json'
    }),
    verbose: Flags.boolean({
      char: 'v',
      description: 'Enable verbose output',
      default: false
    }),
    interactive: Flags.boolean({
      char: 'I',
      description: 'Enable interactive mode for detailed analysis',
      default: false
    })
  };

  async run() {
    const { flags } = await this.parse(AICodeAnalyzer);
    
    console.log(chalk.blue.bold('\n🤖 AI-Powered Code Analyzer'));
    console.log(chalk.gray(`Analyzing code with ${flags.model} model for ${flags.analysis} analysis...\n`));

    try {
      // Create AI analyzer
      const analyzer = this.createAIAnalyzer(flags.model);
      
      // Find files to analyze
      const files = await this.findFiles(flags);
      
      // Perform AI analysis
      const results = await this.performAIAnalysis(files, flags, analyzer);
      
      // Display results
      this.displayResults(results, flags.verbose);
      
      // Save results
      await this.saveResults(results, flags.output);
      console.log(chalk.green(`\n✅ Analysis results saved to: ${flags.output}`));
      
      // Interactive mode
      if (flags.interactive) {
        await this.startInteractiveMode(results, analyzer);
      }
      
    } catch (error) {
      console.error(chalk.red(`\n❌ Error during AI analysis: ${error.message}`));
      this.exit(1);
    }
  }

  createAIAnalyzer(model) {
    return {
      // Performance Analysis
      analyzePerformance: async (code, context) => {
        const insights = [];
        
        // Detect performance anti-patterns
        if (code.includes('for (let i = 0; i < array.length; i++)')) {
          insights.push({
            type: 'performance',
            severity: 'medium',
            confidence: 85,
            issue: 'Inefficient loop condition',
            description: 'Loop condition is evaluated on every iteration',
            suggestion: 'Cache array.length in a variable before the loop',
            impact: 'Reduces unnecessary property access',
            code: 'for (let i = 0, len = array.length; i < len; i++)'
          });
        }
        
        // Detect memory leaks
        if (code.includes('addEventListener') && !code.includes('removeEventListener')) {
          insights.push({
            type: 'performance',
            severity: 'high',
            confidence: 90,
            issue: 'Potential memory leak',
            description: 'Event listeners added but not removed',
            suggestion: 'Ensure event listeners are properly removed in cleanup',
            impact: 'Prevents memory leaks in long-running applications'
          });
        }
        
        // Detect inefficient DOM queries
        if (code.includes('document.getElementById') && code.includes('for')) {
          insights.push({
            type: 'performance',
            severity: 'medium',
            confidence: 80,
            issue: 'Inefficient DOM queries in loop',
            description: 'DOM queries inside loops can be expensive',
            suggestion: 'Cache DOM elements outside the loop',
            impact: 'Reduces DOM traversal overhead'
          });
        }
        
        return insights;
      },

      // Security Analysis
      analyzeSecurity: async (code, context) => {
        const insights = [];
        
        // Detect SQL injection vulnerabilities
        if (code.includes('query') && code.includes('+') && code.includes('userInput')) {
          insights.push({
            type: 'security',
            severity: 'critical',
            confidence: 95,
            issue: 'Potential SQL injection',
            description: 'User input directly concatenated into query',
            suggestion: 'Use parameterized queries or prepared statements',
            impact: 'Prevents SQL injection attacks'
          });
        }
        
        // Detect XSS vulnerabilities
        if (code.includes('innerHTML') && code.includes('userInput')) {
          insights.push({
            type: 'security',
            severity: 'high',
            confidence: 90,
            issue: 'Potential XSS vulnerability',
            description: 'User input directly inserted into innerHTML',
            suggestion: 'Use textContent or sanitize input before insertion',
            impact: 'Prevents cross-site scripting attacks'
          });
        }
        
        // Detect hardcoded secrets
        if (code.includes('password') && code.includes('=') && code.includes('"')) {
          insights.push({
            type: 'security',
            severity: 'high',
            confidence: 85,
            issue: 'Hardcoded credentials',
            description: 'Credentials appear to be hardcoded in source',
            suggestion: 'Use environment variables or secure credential storage',
            impact: 'Prevents credential exposure in source code'
          });
        }
        
        return insights;
      },

      // Code Quality Analysis
      analyzeQuality: async (code, context) => {
        const insights = [];
        
        // Detect code complexity
        const complexity = this.calculateComplexity(code);
        if (complexity > 10) {
          insights.push({
            type: 'quality',
            severity: 'medium',
            confidence: 80,
            issue: 'High cyclomatic complexity',
            description: `Function has complexity of ${complexity}`,
            suggestion: 'Break down into smaller, more focused functions',
            impact: 'Improves readability and maintainability'
          });
        }
        
        // Detect long functions
        const lines = code.split('\n').length;
        if (lines > 50) {
          insights.push({
            type: 'quality',
            severity: 'low',
            confidence: 75,
            issue: 'Long function',
            description: `Function has ${lines} lines`,
            suggestion: 'Consider breaking into smaller functions',
            impact: 'Improves readability and testability'
          });
        }
        
        // Detect duplicate code
        if (this.detectDuplicates(code)) {
          insights.push({
            type: 'quality',
            severity: 'medium',
            confidence: 85,
            issue: 'Duplicate code detected',
            description: 'Similar code blocks found',
            suggestion: 'Extract common functionality into reusable functions',
            impact: 'Reduces maintenance overhead and improves consistency'
          });
        }
        
        return insights;
      },

      // Maintainability Analysis
      analyzeMaintainability: async (code, context) => {
        const insights = [];
        
        // Detect missing documentation
        if (!code.includes('/**') && !code.includes('//') && code.includes('function')) {
          insights.push({
            type: 'maintainability',
            severity: 'low',
            confidence: 70,
            issue: 'Missing documentation',
            description: 'Functions lack proper documentation',
            suggestion: 'Add JSDoc comments for better understanding',
            impact: 'Improves code understanding and maintenance'
          });
        }
        
        // Detect magic numbers
        if (/\d{3,}/.test(code)) {
          insights.push({
            type: 'maintainability',
            severity: 'low',
            confidence: 75,
            issue: 'Magic numbers detected',
            description: 'Large numbers without clear meaning',
            suggestion: 'Use named constants for better readability',
            impact: 'Improves code clarity and maintainability'
          });
        }
        
        // Detect inconsistent naming
        if (this.detectInconsistentNaming(code)) {
          insights.push({
            type: 'maintainability',
            severity: 'low',
            confidence: 80,
            issue: 'Inconsistent naming convention',
            description: 'Mixed naming styles detected',
            suggestion: 'Follow consistent naming conventions',
            impact: 'Improves code consistency and readability'
          });
        }
        
        return insights;
      },

      // AI-Powered Predictions
      generatePredictions: async (code, context) => {
        const predictions = [];
        
        // Predict potential bugs
        if (code.includes('async') && code.includes('await') && !code.includes('try')) {
          predictions.push({
            type: 'bug_prediction',
            confidence: 85,
            prediction: 'Potential unhandled promise rejection',
            description: 'Async function without error handling',
            probability: 0.75,
            impact: 'high'
          });
        }
        
        // Predict performance issues
        if (code.includes('forEach') && code.includes('await')) {
          predictions.push({
            type: 'performance_prediction',
            confidence: 90,
            prediction: 'Inefficient async iteration',
            description: 'Sequential await in forEach instead of parallel execution',
            probability: 0.85,
            impact: 'medium'
          });
        }
        
        // Predict maintenance issues
        if (code.includes('any') && code.includes('TypeScript')) {
          predictions.push({
            type: 'maintainability_prediction',
            confidence: 80,
            prediction: 'Type safety issues',
            description: 'Use of any type reduces TypeScript benefits',
            probability: 0.70,
            impact: 'medium'
          });
        }
        
        return predictions;
      },

      // Code Generation Suggestions
      generateCodeSuggestions: async (code, context) => {
        const suggestions = [];
        
        // Suggest modern JavaScript features
        if (code.includes('function(') && !code.includes('=>')) {
          suggestions.push({
            type: 'modernization',
            confidence: 85,
            suggestion: 'Convert to arrow function',
            description: 'Arrow functions provide cleaner syntax',
            code: code.replace(/function\s*\([^)]*\)\s*{/, '($1) => {'),
            impact: 'improves_readability'
          });
        }
        
        // Suggest async/await
        if (code.includes('.then(') && code.includes('.catch(')) {
          suggestions.push({
            type: 'modernization',
            confidence: 90,
            suggestion: 'Convert to async/await',
            description: 'Async/await provides cleaner promise handling',
            code: this.convertToAsyncAwait(code),
            impact: 'improves_readability'
          });
        }
        
        // Suggest destructuring
        if (code.includes('obj.') && code.includes('obj.')) {
          suggestions.push({
            type: 'modernization',
            confidence: 80,
            suggestion: 'Use destructuring',
            description: 'Destructuring provides cleaner object access',
            code: this.suggestDestructuring(code),
            impact: 'improves_readability'
          });
        }
        
        return suggestions;
      }
    };
  }

  async performAIAnalysis(files, flags, analyzer) {
    const results = {
      timestamp: new Date().toISOString(),
      model: flags.model,
      analysis: flags.analysis,
      confidence: flags.confidence,
      files: [],
      insights: [],
      predictions: [],
      suggestions: [],
      summary: {}
    };

    for (const file of files) {
      try {
        const content = await fs.readFile(file.path, 'utf8');
        const context = {
          filename: file.path,
          language: this.detectLanguage(file.path),
          framework: this.detectFramework(content),
          size: content.length
        };

        const fileResults = {
          file: file.path,
          context,
          insights: [],
          predictions: [],
          suggestions: []
        };

        // Perform analysis based on flags
        if (flags.analysis === 'all' || flags.analysis === 'performance') {
          const performanceInsights = await analyzer.analyzePerformance(content, context);
          fileResults.insights.push(...performanceInsights);
        }

        if (flags.analysis === 'all' || flags.analysis === 'security') {
          const securityInsights = await analyzer.analyzeSecurity(content, context);
          fileResults.insights.push(...securityInsights);
        }

        if (flags.analysis === 'all' || flags.analysis === 'quality') {
          const qualityInsights = await analyzer.analyzeQuality(content, context);
          fileResults.insights.push(...qualityInsights);
        }

        if (flags.analysis === 'all' || flags.analysis === 'maintainability') {
          const maintainabilityInsights = await analyzer.analyzeMaintainability(content, context);
          fileResults.insights.push(...maintainabilityInsights);
        }

        // Generate predictions
        const predictions = await analyzer.generatePredictions(content, context);
        fileResults.predictions = predictions;

        // Generate suggestions
        const suggestions = await analyzer.generateCodeSuggestions(content, context);
        fileResults.suggestions = suggestions;

        // Filter by confidence threshold
        fileResults.insights = fileResults.insights.filter(insight => insight.confidence >= flags.confidence);
        fileResults.predictions = fileResults.predictions.filter(prediction => prediction.confidence >= flags.confidence);
        fileResults.suggestions = fileResults.suggestions.filter(suggestion => suggestion.confidence >= flags.confidence);

        results.files.push(fileResults);
        results.insights.push(...fileResults.insights);
        results.predictions.push(...fileResults.predictions);
        results.suggestions.push(...fileResults.suggestions);

      } catch (error) {
        results.files.push({
          file: file.path,
          error: error.message
        });
      }
    }

    // Generate summary
    results.summary = this.generateSummary(results);

    return results;
  }

  async findFiles(flags) {
    const includePatterns = flags.include.split(',');
    const excludePatterns = flags.exclude.split(',');
    
    const files = [];
    
    for (const pattern of includePatterns) {
      const matches = glob.sync(pattern, {
        cwd: flags.path,
        absolute: true,
        ignore: excludePatterns
      });
      
      files.push(...matches.map(file => ({ path: file })));
    }
    
    return files;
  }

  detectLanguage(filePath) {
    const ext = path.extname(filePath).toLowerCase();
    const languageMap = {
      '.js': 'javascript',
      '.ts': 'typescript',
      '.jsx': 'javascript',
      '.tsx': 'typescript',
      '.py': 'python',
      '.java': 'java',
      '.cs': 'csharp'
    };
    return languageMap[ext] || 'unknown';
  }

  detectFramework(content) {
    if (content.includes('react') || content.includes('React')) return 'react';
    if (content.includes('angular') || content.includes('Angular')) return 'angular';
    if (content.includes('vue') || content.includes('Vue')) return 'vue';
    if (content.includes('cypress') || content.includes('Cypress')) return 'cypress';
    if (content.includes('playwright') || content.includes('Playwright')) return 'playwright';
    return 'unknown';
  }

  calculateComplexity(code) {
    // Simple cyclomatic complexity calculation
    const complexityKeywords = ['if', 'else', 'for', 'while', 'switch', 'case', 'catch', '&&', '||', '?'];
    let complexity = 1; // Base complexity
    
    for (const keyword of complexityKeywords) {
      const regex = new RegExp(`\\b${keyword}\\b`, 'g');
      const matches = code.match(regex);
      if (matches) {
        complexity += matches.length;
      }
    }
    
    return complexity;
  }

  detectDuplicates(code) {
    // Simple duplicate detection
    const lines = code.split('\n');
    const lineCounts = {};
    
    for (const line of lines) {
      const trimmed = line.trim();
      if (trimmed.length > 10) { // Only consider substantial lines
        lineCounts[trimmed] = (lineCounts[trimmed] || 0) + 1;
      }
    }
    
    return Object.values(lineCounts).some(count => count > 2);
  }

  detectInconsistentNaming(code) {
    const camelCase = /[a-z][a-zA-Z0-9]*/g;
    const snakeCase = /[a-z][a-z0-9_]*/g;
    const pascalCase = /[A-Z][a-zA-Z0-9]*/g;
    
    const camelMatches = code.match(camelCase) || [];
    const snakeMatches = code.match(snakeCase) || [];
    const pascalMatches = code.match(pascalCase) || [];
    
    return camelMatches.length > 0 && snakeMatches.length > 0 && pascalMatches.length > 0;
  }

  convertToAsyncAwait(code) {
    // Simple conversion example
    return code.replace(/\.then\(([^)]+)\)\.catch\(([^)]+)\)/g, 'try { $1 } catch (error) { $2 }');
  }

  suggestDestructuring(code) {
    // Simple destructuring suggestion
    return code.replace(/const\s+(\w+)\s*=\s*(\w+)\.(\w+);/g, 'const { $3: $1 } = $2;');
  }

  generateSummary(results) {
    const totalFiles = results.files.length;
    const filesWithIssues = results.files.filter(f => f.insights && f.insights.length > 0).length;
    const totalInsights = results.insights.length;
    const totalPredictions = results.predictions.length;
    const totalSuggestions = results.suggestions.length;
    
    const severityCounts = {
      critical: results.insights.filter(i => i.severity === 'critical').length,
      high: results.insights.filter(i => i.severity === 'high').length,
      medium: results.insights.filter(i => i.severity === 'medium').length,
      low: results.insights.filter(i => i.severity === 'low').length
    };
    
    return {
      totalFiles,
      filesWithIssues,
      totalInsights,
      totalPredictions,
      totalSuggestions,
      severityCounts,
      averageConfidence: totalInsights > 0 ? 
        (results.insights.reduce((sum, i) => sum + i.confidence, 0) / totalInsights).toFixed(2) : 0
    };
  }

  async saveResults(results, outputFile) {
    await fs.writeJson(outputFile, results, { spaces: 2 });
  }

  async startInteractiveMode(results, analyzer) {
    console.log(chalk.blue.bold('\n🔍 Interactive Analysis Mode'));
    console.log(chalk.gray('Ask questions about your code analysis...\n'));
    
    // Simulate interactive questions
    const questions = [
      'What are the most critical issues in my code?',
      'How can I improve performance?',
      'What security vulnerabilities should I address first?',
      'Are there any code quality improvements I can make?'
    ];
    
    for (const question of questions) {
      console.log(chalk.cyan(`\n❓ ${question}`));
      const answer = this.generateAnswer(question, results);
      console.log(chalk.white(`💡 ${answer}`));
    }
  }

  generateAnswer(question, results) {
    if (question.includes('critical')) {
      const criticalIssues = results.insights.filter(i => i.severity === 'critical');
      return criticalIssues.length > 0 ? 
        `Found ${criticalIssues.length} critical issues. Focus on: ${criticalIssues[0].issue}` :
        'No critical issues found. Your code looks good!';
    }
    
    if (question.includes('performance')) {
      const perfIssues = results.insights.filter(i => i.type === 'performance');
      return perfIssues.length > 0 ? 
        `Found ${perfIssues.length} performance issues. Consider: ${perfIssues[0].suggestion}` :
        'No performance issues detected.';
    }
    
    if (question.includes('security')) {
      const secIssues = results.insights.filter(i => i.type === 'security');
      return secIssues.length > 0 ? 
        `Found ${secIssues.length} security issues. Address: ${secIssues[0].issue}` :
        'No security vulnerabilities detected.';
    }
    
    if (question.includes('quality')) {
      const qualIssues = results.insights.filter(i => i.type === 'quality');
      return qualIssues.length > 0 ? 
        `Found ${qualIssues.length} quality issues. Improve: ${qualIssues[0].suggestion}` :
        'Code quality looks good!';
    }
    
    return 'Analysis complete. Review the detailed results for specific recommendations.';
  }

  displayResults(results, verbose) {
    console.log(chalk.green.bold('\n🤖 AI Analysis Results'));
    console.log(chalk.gray('=' * 50));
    
    // Summary
    console.log(chalk.blue.bold('\n📊 Summary:'));
    console.log(`  Total files analyzed: ${results.summary.totalFiles}`);
    console.log(`  Files with issues: ${results.summary.filesWithIssues}`);
    console.log(`  Total insights: ${results.summary.totalInsights}`);
    console.log(`  Total predictions: ${results.summary.totalPredictions}`);
    console.log(`  Total suggestions: ${results.summary.totalSuggestions}`);
    console.log(`  Average confidence: ${results.summary.averageConfidence}%`);
    
    // Severity breakdown
    console.log(chalk.blue.bold('\n⚠️  Issues by Severity:'));
    console.log(`  Critical: ${chalk.red(results.summary.severityCounts.critical)}`);
    console.log(`  High: ${chalk.yellow(results.summary.severityCounts.high)}`);
    console.log(`  Medium: ${chalk.blue(results.summary.severityCounts.medium)}`);
    console.log(`  Low: ${chalk.gray(results.summary.severityCounts.low)}`);
    
    // Top insights
    if (results.insights.length > 0) {
      console.log(chalk.blue.bold('\n🔍 Top Insights:'));
      const topInsights = results.insights
        .sort((a, b) => b.confidence - a.confidence)
        .slice(0, 5);
      
      topInsights.forEach((insight, index) => {
        const severity = insight.severity === 'critical' ? chalk.red('🔴') :
                        insight.severity === 'high' ? chalk.yellow('🟡') :
                        insight.severity === 'medium' ? chalk.blue('🔵') : chalk.gray('⚪');
        
        console.log(`  ${index + 1}. ${severity} ${insight.issue} (${insight.confidence}%)`);
        console.log(`     ${insight.description}`);
        console.log(`     💡 ${insight.suggestion}`);
      });
    }
    
    // Predictions
    if (results.predictions.length > 0) {
      console.log(chalk.blue.bold('\n🔮 AI Predictions:'));
      results.predictions.forEach((prediction, index) => {
        console.log(`  ${index + 1}. ${prediction.prediction} (${prediction.confidence}%)`);
        console.log(`     ${prediction.description}`);
        console.log(`     Probability: ${(prediction.probability * 100).toFixed(1)}%`);
      });
    }
    
    // Suggestions
    if (results.suggestions.length > 0) {
      console.log(chalk.blue.bold('\n💡 Code Suggestions:'));
      results.suggestions.forEach((suggestion, index) => {
        console.log(`  ${index + 1}. ${suggestion.suggestion} (${suggestion.confidence}%)`);
        console.log(`     ${suggestion.description}`);
      });
    }
    
    if (verbose) {
      console.log(chalk.blue.bold('\n🔍 Detailed Results:'));
      console.log(JSON.stringify(results, null, 2));
    }
  }
}

module.exports.default = AICodeAnalyzer;