smartui-migration-tool/lib/simple-commands/transformation-engine.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 TransformationEngine extends Command {
  static description = 'Advanced transformation engine for comprehensive code migration';

  static flags = {
    path: Flags.string({
      char: 'p',
      description: 'Path to transform (default: current directory)',
      default: process.cwd()
    }),
    source: Flags.string({
      char: 's',
      description: 'Source platform (percy, applitools, saucelabs)',
      default: 'percy'
    }),
    target: Flags.string({
      char: 't',
      description: 'Target platform (smartui)',
      default: 'smartui'
    }),
    framework: Flags.string({
      char: 'f',
      description: 'Target framework (cypress, playwright, selenium)',
      default: 'cypress'
    }),
    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'
    }),
    output: Flags.string({
      char: 'o',
      description: 'Output directory for transformed files',
      default: 'transformed'
    }),
    dryrun: Flags.boolean({
      char: 'd',
      description: 'Perform dry run without making changes',
      default: false
    }),
    backup: Flags.boolean({
      char: 'b',
      description: 'Create backup of original files',
      default: true
    }),
    verbose: Flags.boolean({
      char: 'v',
      description: 'Enable verbose output',
      default: false
    })
  };

  async run() {
    const { flags } = await this.parse(TransformationEngine);
    
    console.log(chalk.blue.bold('\n🔄 Advanced Transformation Engine'));
    console.log(chalk.gray('Performing comprehensive code migration...\n'));

    try {
      // Create transformation engine
      const engine = this.createTransformationEngine();
      
      // Perform transformation
      const results = await this.performTransformation(flags, engine);
      
      // Display results
      this.displayResults(results, flags.verbose);
      
      // Save results
      if (flags.output) {
        await this.saveResults(results, flags.output);
        console.log(chalk.green(`\n✅ Transformation results saved to: ${flags.output}`));
      }
      
    } catch (error) {
      console.error(chalk.red(`\n❌ Error during transformation: ${error.message}`));
      this.exit(1);
    }
  }

  createTransformationEngine() {
    return {
      // Step-by-Step Transformation Planning
      planTransformation: (files, source, target, framework) => {
        const steps = [];
        
        // Step 1: Analyze source code
        steps.push({
          id: 'analyze',
          name: 'Analyze Source Code',
          description: 'Analyze source code for transformation opportunities',
          status: 'pending',
          files: files.length
        });
        
        // Step 2: Identify patterns
        steps.push({
          id: 'identify',
          name: 'Identify Patterns',
          description: 'Identify visual testing patterns and framework usage',
          status: 'pending',
          patterns: 0
        });
        
        // Step 3: Generate transformations
        steps.push({
          id: 'generate',
          name: 'Generate Transformations',
          description: 'Generate transformation rules and mappings',
          status: 'pending',
          transformations: 0
        });
        
        // Step 4: Apply transformations
        steps.push({
          id: 'apply',
          name: 'Apply Transformations',
          description: 'Apply transformations to source files',
          status: 'pending',
          files: 0
        });
        
        // Step 5: Validate results
        steps.push({
          id: 'validate',
          name: 'Validate Results',
          description: 'Validate transformed code for correctness',
          status: 'pending',
          issues: 0
        });
        
        return steps;
      },

      // Rollback Capabilities
      createRollbackPlan: (originalFiles, transformedFiles) => {
        const rollbackPlan = {
          steps: [],
          files: [],
          timestamp: new Date().toISOString()
        };
        
        // Create rollback steps
        rollbackPlan.steps.push({
          id: 'backup_original',
          name: 'Backup Original Files',
          description: 'Create backup of original files',
          status: 'pending'
        });
        
        rollbackPlan.steps.push({
          id: 'restore_files',
          name: 'Restore Original Files',
          description: 'Restore original files from backup',
          status: 'pending'
        });
        
        rollbackPlan.steps.push({
          id: 'cleanup',
          name: 'Cleanup',
          description: 'Clean up temporary files and backups',
          status: 'pending'
        });
        
        // Track files for rollback
        originalFiles.forEach(file => {
          rollbackPlan.files.push({
            original: file.path,
            backup: file.path + '.backup',
            transformed: file.path + '.transformed'
          });
        });
        
        return rollbackPlan;
      },

      // Validation Engine
      validateTransformation: (originalFile, transformedFile) => {
        const validation = {
          isValid: true,
          issues: [],
          warnings: [],
          suggestions: []
        };
        
        // Check syntax validity
        const syntaxCheck = this.checkSyntax(transformedFile.content, transformedFile.language);
        if (!syntaxCheck.isValid) {
          validation.isValid = false;
          validation.issues.push(...syntaxCheck.errors);
        }
        
        // Check for missing imports
        const importCheck = this.checkImports(transformedFile.content, transformedFile.language);
        if (importCheck.missing.length > 0) {
          validation.warnings.push(...importCheck.missing.map(imp => `Missing import: ${imp}`));
        }
        
        // Check for deprecated patterns
        const deprecationCheck = this.checkDeprecations(transformedFile.content, transformedFile.language);
        if (deprecationCheck.deprecated.length > 0) {
          validation.warnings.push(...deprecationCheck.deprecated.map(dep => `Deprecated pattern: ${dep}`));
        }
        
        // Check for performance issues
        const performanceCheck = this.checkPerformance(transformedFile.content, transformedFile.language);
        if (performanceCheck.issues.length > 0) {
          validation.suggestions.push(...performanceCheck.issues.map(perf => `Performance: ${perf}`));
        }
        
        return validation;
      },

      // Error Handling
      handleTransformationError: (error, file, step) => {
        const errorInfo = {
          file: file.path,
          step: step,
          error: error.message,
          timestamp: new Date().toISOString(),
          suggestions: []
        };
        
        // Provide specific suggestions based on error type
        if (error.message.includes('syntax')) {
          errorInfo.suggestions.push('Check syntax and fix any syntax errors');
        } else if (error.message.includes('import')) {
          errorInfo.suggestions.push('Check import statements and dependencies');
        } else if (error.message.includes('pattern')) {
          errorInfo.suggestions.push('Review pattern matching and transformation rules');
        } else {
          errorInfo.suggestions.push('Review the transformation logic and fix the issue');
        }
        
        return errorInfo;
      }
    };
  }

  async performTransformation(flags, engine) {
    const results = {
      timestamp: new Date().toISOString(),
      source: flags.source,
      target: flags.target,
      framework: flags.framework,
      path: flags.path,
      files: [],
      steps: [],
      transformations: [],
      validations: [],
      errors: [],
      rollbackPlan: null,
      summary: {}
    };

    // Find files to transform
    const files = await this.findFiles(flags);
    results.files = files;

    // Plan transformation
    results.steps = engine.planTransformation(files, flags.source, flags.target, flags.framework);

    // Create rollback plan
    results.rollbackPlan = engine.createRollbackPlan(files, []);

    // Perform transformation steps
    for (const step of results.steps) {
      try {
        step.status = 'in_progress';
        
        if (step.id === 'analyze') {
          await this.performAnalysis(files, step);
        } else if (step.id === 'identify') {
          await this.performPatternIdentification(files, step);
        } else if (step.id === 'generate') {
          await this.performTransformationGeneration(files, step, flags);
        } else if (step.id === 'apply') {
          await this.performTransformationApplication(files, step, flags, engine);
        } else if (step.id === 'validate') {
          await this.performValidation(files, step, engine);
        }
        
        step.status = 'completed';
        
      } catch (error) {
        step.status = 'failed';
        step.error = error.message;
        
        const errorInfo = engine.handleTransformationError(error, files[0], step.id);
        results.errors.push(errorInfo);
        
        if (flags.verbose) {
          console.error(chalk.red(`❌ Error in step ${step.id}: ${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 })));
    }
    
    // Read file contents
    for (const file of files) {
      try {
        const content = await fs.readFile(file.path, 'utf8');
        const language = this.detectLanguage(file.path);
        
        file.content = content;
        file.language = language;
        file.size = content.length;
        file.lines = content.split('\n').length;
        file.originalContent = content;
      } catch (error) {
        if (flags.verbose) {
          console.warn(chalk.yellow(`⚠️  Could not read file: ${file.path}`));
        }
      }
    }
    
    return files;
  }

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

  async performAnalysis(files, step) {
    step.analysis = {
      totalFiles: files.length,
      languages: {},
      patterns: {},
      complexity: 0
    };
    
    // Analyze languages
    files.forEach(file => {
      if (file.language) {
        step.analysis.languages[file.language] = (step.analysis.languages[file.language] || 0) + 1;
      }
    });
    
    // Analyze patterns
    files.forEach(file => {
      if (file.content) {
        const patterns = this.analyzePatterns(file.content, file.language);
        Object.entries(patterns).forEach(([pattern, count]) => {
          step.analysis.patterns[pattern] = (step.analysis.patterns[pattern] || 0) + count;
        });
      }
    });
    
    // Calculate complexity
    step.analysis.complexity = files.reduce((sum, file) => {
      return sum + (file.content ? this.calculateComplexity(file.content) : 0);
    }, 0);
  }

  async performPatternIdentification(files, step) {
    step.patterns = [];
    
    files.forEach(file => {
      if (file.content) {
        const patterns = this.identifyVisualTestingPatterns(file.content, file.language);
        patterns.forEach(pattern => {
          step.patterns.push({
            file: file.path,
            pattern: pattern.type,
            confidence: pattern.confidence,
            description: pattern.description
          });
        });
      }
    });
    
    step.patterns = step.patterns.length;
  }

  async performTransformationGeneration(files, step, flags) {
    step.transformations = [];
    
    // Generate transformation rules based on source and target
    const rules = this.generateTransformationRules(flags.source, flags.target, flags.framework);
    
    files.forEach(file => {
      if (file.content) {
        const transformations = this.generateFileTransformations(file, rules);
        step.transformations.push(...transformations);
      }
    });
    
    step.transformations = step.transformations.length;
  }

  async performTransformationApplication(files, step, flags, engine) {
    step.applied = 0;
    step.failed = 0;
    
    for (const file of files) {
      try {
        if (file.content) {
          // Apply transformations
          const transformedContent = this.applyTransformations(file.content, file.language, flags);
          
          if (transformedContent !== file.content) {
            file.transformedContent = transformedContent;
            file.isTransformed = true;
            step.applied++;
            
            // Create backup if requested
            if (flags.backup) {
              await fs.writeFile(file.path + '.backup', file.originalContent);
            }
            
            // Write transformed content if not dry run
            if (!flags.dryrun) {
              await fs.writeFile(file.path, transformedContent);
            }
          }
        }
      } catch (error) {
        step.failed++;
        const errorInfo = engine.handleTransformationError(error, file, 'apply');
        console.error(chalk.red(`❌ Failed to transform ${file.path}: ${error.message}`));
      }
    }
  }

  async performValidation(files, step, engine) {
    step.validations = [];
    step.issues = 0;
    
    for (const file of files) {
      if (file.isTransformed && file.transformedContent) {
        const validation = engine.validateTransformation(file, {
          content: file.transformedContent,
          language: file.language
        });
        
        step.validations.push({
          file: file.path,
          validation: validation
        });
        
        step.issues += validation.issues.length + validation.warnings.length;
      }
    }
  }

  analyzePatterns(content, language) {
    const patterns = {};
    
    // Visual testing patterns
    if (content.includes('percy') || content.includes('Percy')) {
      patterns.percy = (patterns.percy || 0) + 1;
    }
    
    if (content.includes('applitools') || content.includes('eyes')) {
      patterns.applitools = (patterns.applitools || 0) + 1;
    }
    
    if (content.includes('screenshot') || content.includes('snapshot')) {
      patterns.screenshot = (patterns.screenshot || 0) + 1;
    }
    
    // Framework patterns
    if (content.includes('cypress') || content.includes('cy.')) {
      patterns.cypress = (patterns.cypress || 0) + 1;
    }
    
    if (content.includes('playwright') || content.includes('page.')) {
      patterns.playwright = (patterns.playwright || 0) + 1;
    }
    
    if (content.includes('selenium') || content.includes('driver.')) {
      patterns.selenium = (patterns.selenium || 0) + 1;
    }
    
    return patterns;
  }

  identifyVisualTestingPatterns(content, language) {
    const patterns = [];
    
    // Percy patterns
    if (content.includes('percy.snapshot')) {
      patterns.push({
        type: 'percy_snapshot',
        confidence: 0.9,
        description: 'Percy snapshot call detected'
      });
    }
    
    if (content.includes('percy.capture')) {
      patterns.push({
        type: 'percy_capture',
        confidence: 0.9,
        description: 'Percy capture call detected'
      });
    }
    
    // Applitools patterns
    if (content.includes('eyes.check')) {
      patterns.push({
        type: 'applitools_check',
        confidence: 0.9,
        description: 'Applitools check call detected'
      });
    }
    
    if (content.includes('eyes.open')) {
      patterns.push({
        type: 'applitools_open',
        confidence: 0.9,
        description: 'Applitools open call detected'
      });
    }
    
    // Generic screenshot patterns
    if (content.includes('screenshot') || content.includes('snapshot')) {
      patterns.push({
        type: 'screenshot',
        confidence: 0.7,
        description: 'Screenshot/snapshot call detected'
      });
    }
    
    return patterns;
  }

  generateTransformationRules(source, target, framework) {
    const rules = {
      source: source,
      target: target,
      framework: framework,
      mappings: []
    };
    
    if (source === 'percy' && target === 'smartui') {
      rules.mappings.push({
        from: 'percy.snapshot',
        to: 'smartui.snapshot',
        description: 'Convert Percy snapshot to SmartUI snapshot'
      });
      
      rules.mappings.push({
        from: 'percy.capture',
        to: 'smartui.capture',
        description: 'Convert Percy capture to SmartUI capture'
      });
    }
    
    if (source === 'applitools' && target === 'smartui') {
      rules.mappings.push({
        from: 'eyes.check',
        to: 'smartui.check',
        description: 'Convert Applitools check to SmartUI check'
      });
      
      rules.mappings.push({
        from: 'eyes.open',
        to: 'smartui.open',
        description: 'Convert Applitools open to SmartUI open'
      });
    }
    
    return rules;
  }

  generateFileTransformations(file, rules) {
    const transformations = [];
    
    rules.mappings.forEach(mapping => {
      if (file.content.includes(mapping.from)) {
        transformations.push({
          file: file.path,
          mapping: mapping,
          occurrences: (file.content.match(new RegExp(mapping.from, 'g')) || []).length
        });
      }
    });
    
    return transformations;
  }

  applyTransformations(content, language, flags) {
    let transformedContent = content;
    
    // Apply Percy to SmartUI transformations
    if (flags.source === 'percy' && flags.target === 'smartui') {
      transformedContent = transformedContent.replace(/percy\.snapshot\(/g, 'smartui.snapshot(');
      transformedContent = transformedContent.replace(/percy\.capture\(/g, 'smartui.capture(');
    }
    
    // Apply Applitools to SmartUI transformations
    if (flags.source === 'applitools' && flags.target === 'smartui') {
      transformedContent = transformedContent.replace(/eyes\.check\(/g, 'smartui.check(');
      transformedContent = transformedContent.replace(/eyes\.open\(/g, 'smartui.open(');
    }
    
    // Add SmartUI imports if needed
    if (transformedContent.includes('smartui.') && !transformedContent.includes('import') && !transformedContent.includes('require')) {
      if (language === 'javascript' || language === 'typescript') {
        transformedContent = "import { smartui } from '@lambdatest/smartui';\n" + transformedContent;
      } else if (language === 'python') {
        transformedContent = "from lambdatest_smartui import smartui\n" + transformedContent;
      }
    }
    
    return transformedContent;
  }

  calculateComplexity(content) {
    // Simple complexity calculation
    const complexity = (content.match(/if|for|while|switch|catch/g) || []).length;
    return complexity;
  }

  checkSyntax(content, language) {
    // Simple syntax check - in a real implementation, this would use proper parsers
    const syntaxCheck = {
      isValid: true,
      errors: []
    };
    
    // Check for basic syntax issues
    if (language === 'javascript' || language === 'typescript') {
      // Check for unmatched braces
      const openBraces = (content.match(/\{/g) || []).length;
      const closeBraces = (content.match(/\}/g) || []).length;
      
      if (openBraces !== closeBraces) {
        syntaxCheck.isValid = false;
        syntaxCheck.errors.push('Unmatched braces detected');
      }
      
      // Check for unmatched parentheses
      const openParens = (content.match(/\(/g) || []).length;
      const closeParens = (content.match(/\)/g) || []).length;
      
      if (openParens !== closeParens) {
        syntaxCheck.isValid = false;
        syntaxCheck.errors.push('Unmatched parentheses detected');
      }
    }
    
    return syntaxCheck;
  }

  checkImports(content, language) {
    const importCheck = {
      missing: [],
      unused: []
    };
    
    // Check for missing SmartUI imports
    if (content.includes('smartui.') && !content.includes('smartui')) {
      importCheck.missing.push('@lambdatest/smartui');
    }
    
    return importCheck;
  }

  checkDeprecations(content, language) {
    const deprecationCheck = {
      deprecated: []
    };
    
    // Check for deprecated patterns
    if (content.includes('percy.') || content.includes('eyes.')) {
      deprecationCheck.deprecated.push('Legacy visual testing API usage');
    }
    
    return deprecationCheck;
  }

  checkPerformance(content, language) {
    const performanceCheck = {
      issues: []
    };
    
    // Check for performance issues
    if (content.includes('eval(')) {
      performanceCheck.issues.push('eval() usage can impact performance');
    }
    
    return performanceCheck;
  }

  generateSummary(results) {
    const summary = {
      totalFiles: results.files.length,
      transformedFiles: results.files.filter(f => f.isTransformed).length,
      totalSteps: results.steps.length,
      completedSteps: results.steps.filter(s => s.status === 'completed').length,
      failedSteps: results.steps.filter(s => s.status === 'failed').length,
      totalErrors: results.errors.length,
      totalValidations: results.validations.length,
      totalIssues: results.validations.reduce((sum, v) => sum + v.validation.issues.length, 0)
    };
    
    return summary;
  }

  displayResults(results, verbose) {
    console.log(chalk.green.bold('\n🔄 Transformation Engine Results'));
    console.log(chalk.gray('=' * 50));
    
    // Summary
    console.log(chalk.blue.bold('\n📊 Summary:'));
    console.log(`  Total files: ${results.summary.totalFiles}`);
    console.log(`  Transformed files: ${results.summary.transformedFiles}`);
    console.log(`  Completed steps: ${results.summary.completedSteps}/${results.summary.totalSteps}`);
    console.log(`  Failed steps: ${results.summary.failedSteps}`);
    console.log(`  Total errors: ${results.summary.totalErrors}`);
    console.log(`  Total issues: ${results.summary.totalIssues}`);
    
    // Steps
    console.log(chalk.blue.bold('\n📋 Steps:'));
    results.steps.forEach((step, index) => {
      const statusColor = step.status === 'completed' ? chalk.green : 
                         step.status === 'failed' ? chalk.red : 
                         step.status === 'in_progress' ? chalk.yellow : chalk.gray;
      
      console.log(`  ${index + 1}. ${statusColor(step.name)} (${step.status})`);
      console.log(`     ${step.description}`);
      
      if (step.status === 'failed' && step.error) {
        console.log(`     Error: ${step.error}`);
      }
    });
    
    // Errors
    if (results.errors.length > 0) {
      console.log(chalk.blue.bold('\n❌ Errors:'));
      results.errors.forEach((error, index) => {
        console.log(`  ${index + 1}. ${error.file}`);
        console.log(`     Step: ${error.step}`);
        console.log(`     Error: ${error.error}`);
        if (error.suggestions.length > 0) {
          console.log(`     Suggestions: ${error.suggestions.join(', ')}`);
        }
      });
    }
    
    // Validations
    if (results.validations.length > 0) {
      console.log(chalk.blue.bold('\n✅ Validations:'));
      results.validations.forEach((validation, index) => {
        const v = validation.validation;
        const statusColor = v.isValid ? chalk.green : chalk.red;
        console.log(`  ${index + 1}. ${path.basename(validation.file)} ${statusColor(v.isValid ? '✓' : '✗')}`);
        
        if (v.issues.length > 0) {
          console.log(`     Issues: ${v.issues.length}`);
        }
        
        if (v.warnings.length > 0) {
          console.log(`     Warnings: ${v.warnings.length}`);
        }
        
        if (v.suggestions.length > 0) {
          console.log(`     Suggestions: ${v.suggestions.length}`);
        }
      });
    }
    
    if (verbose) {
      console.log(chalk.blue.bold('\n🔍 Detailed Results:'));
      console.log(JSON.stringify(results, null, 2));
    }
  }

  async saveResults(results, outputDir) {
    await fs.ensureDir(outputDir);
    
    // Save main results
    await fs.writeJson(path.join(outputDir, 'transformation-results.json'), results, { spaces: 2 });
    
    // Save rollback plan
    if (results.rollbackPlan) {
      await fs.writeJson(path.join(outputDir, 'rollback-plan.json'), results.rollbackPlan, { spaces: 2 });
    }
    
    // Save individual file transformations
    const transformedFiles = results.files.filter(f => f.isTransformed);
    if (transformedFiles.length > 0) {
      const transformationsDir = path.join(outputDir, 'transformations');
      await fs.ensureDir(transformationsDir);
      
      for (const file of transformedFiles) {
        const relativePath = path.relative(results.path, file.path);
        const outputPath = path.join(transformationsDir, relativePath);
        await fs.ensureDir(path.dirname(outputPath));
        await fs.writeFile(outputPath, file.transformedContent);
      }
    }
  }
}

module.exports.default = TransformationEngine;