export class CodeReviewerAgent extends BaseAgent {
  private codeAnalyzer: CodeAnalyzer;
  private securityScanner: SecurityScanner;
  private performanceAnalyzer: PerformanceAnalyzer;
  private architectureValidator: ArchitectureValidator;
  
  constructor(config: ReviewerAgentConfig) {
    super(config);
    this.type = AgentType.CODE_REVIEWER;
    this.capabilities = [
      'code_review',
      'security_analysis',
      'performance_review',
      'architecture_validation',
      'best_practices_enforcement',
      'documentation_review',
      'tdd_compliance_check'
    ];
  }
  
  async initialize(): Promise<void> {
    await super.initialize();
    await this.loadReviewRules();
    await this.initializeAnalyzers();
    await this.setupReviewEnvironment();
  }
  
  async processTask(task: Task): Promise<TaskResult> {
    switch (task.type) {
      case 'review_pull_request':
        return await this.reviewPullRequest(task);
      case 'security_audit':
        return await this.performSecurityAudit(task);
      case 'performance_analysis':
        return await this.analyzePerformance(task);
      case 'architecture_review':
        return await this.reviewArchitecture(task);
      case 'approve_release':
        return await this.approveRelease(task);
      default:
        throw new Error(`Unknown task type: ${task.type}`);
    }
  }
}

interface ReviewerAgentState extends AgentState {
  activeReviews: Map<string, ReviewSession>;
  reviewHistory: ReviewHistory[];
  codeMetrics: CodeMetrics;
  securityFindings: SecurityFinding[];
  performanceBaseline: PerformanceBaseline;
}

interface ReviewSession {
  id: string;
  pullRequestId: string;
  startTime: Date;
  findings: Finding[];
  suggestions: Suggestion[];
  decision?: ReviewDecision;
  iterations: ReviewIteration[];
}

interface Finding {
  id: string;
  severity: 'critical' | 'major' | 'minor' | 'info';
  type: FindingType;
  file: string;
  line: number;
  description: string;
  suggestion: string;
  category: string;
}

class CodeReviewer {
  async reviewPullRequest(
    pullRequest: PullRequest
  ): Promise<ReviewResult> {
    const review = new ReviewSession();
    
    // Fetch PR details and changes
    const changes = await this.fetchPRChanges(pullRequest);
    
    // Run multiple analysis passes
    const analyses = await Promise.all([
      this.analyzeCodeQuality(changes),
      this.analyzeSecurity(changes),
      this.analyzePerformance(changes),
      this.analyzeArchitecture(changes),
      this.analyzeTestCoverage(changes),
      this.analyzeDocumentation(changes),
      this.analyzeTDDCompliance(changes)
    ]);
    
    // Consolidate findings
    const findings = this.consolidateFindings(analyses);
    
    // Generate improvement suggestions
    const suggestions = await this.generateSuggestions(findings);
    
    // Make review decision
    const decision = await this.makeReviewDecision(findings);
    
    return {
      pullRequestId: pullRequest.id,
      decision: decision,
      findings: findings,
      suggestions: suggestions,
      metrics: await this.calculateMetrics(changes)
    };
  }
  
  private async analyzeCodeQuality(
    changes: CodeChanges
  ): Promise<QualityAnalysis> {
    const issues: CodeIssue[] = [];
    
    for (const file of changes.files) {
      // Check coding standards
      const standardsIssues = await this.checkCodingStandards(file);
      issues.push(...standardsIssues);
      
      // Detect code smells
      const codeSmells = await this.detectCodeSmells(file);
      issues.push(...codeSmells);
      
      // Check complexity
      const complexityIssues = await this.analyzeComplexity(file);
      issues.push(...complexityIssues);
      
      // Validate naming conventions
      const namingIssues = await this.checkNamingConventions(file);
      issues.push(...namingIssues);
    }
    
    return {
      category: 'code_quality',
      issues: issues,
      score: this.calculateQualityScore(issues)
    };
  }
}

class SecurityAnalyzer {
  async analyzeSecurity(
    changes: CodeChanges
  ): Promise<SecurityAnalysis> {
    const vulnerabilities: Vulnerability[] = [];
    
    // Check for common vulnerabilities
    vulnerabilities.push(...await this.checkSQLInjection(changes));
    vulnerabilities.push(...await this.checkXSS(changes));
    vulnerabilities.push(...await this.checkAuthentication(changes));
    vulnerabilities.push(...await this.checkAuthorization(changes));
    vulnerabilities.push(...await this.checkCryptography(changes));
    vulnerabilities.push(...await this.checkDependencies(changes));
    
    // Check for sensitive data exposure
    const dataExposure = await this.checkSensitiveDataExposure(changes);
    vulnerabilities.push(...dataExposure);
    
    // Validate input sanitization
    const inputValidation = await this.checkInputValidation(changes);
    vulnerabilities.push(...inputValidation);
    
    return {
      category: 'security',
      vulnerabilities: vulnerabilities,
      riskLevel: this.calculateRiskLevel(vulnerabilities),
      recommendations: await this.generateSecurityRecommendations(vulnerabilities)
    };
  }
  
  private async checkSQLInjection(
    changes: CodeChanges
  ): Promise<Vulnerability[]> {
    const vulnerabilities: Vulnerability[] = [];
    
    for (const file of changes.files) {
      // Check for raw SQL queries
      const sqlPatterns = [
        /query\s*\(\s*['"`].*\$\{.*\}.*['"`]\s*\)/g,
        /execute\s*\(\s*['"`].*\+.*['"`]\s*\)/g,
        /raw\s*\(\s*['"`].*%s.*['"`].*%.*\)/g
      ];
      
      for (const pattern of sqlPatterns) {
        const matches = file.content.matchAll(pattern);
        for (const match of matches) {
          vulnerabilities.push({
            type: 'SQL_INJECTION',
            severity: 'critical',
            file: file.path,
            line: this.getLineNumber(file.content, match.index),
            description: 'Potential SQL injection vulnerability',
            recommendation: 'Use parameterized queries or prepared statements'
          });
        }
      }
    }
    
    return vulnerabilities;
  }
}

class PerformanceAnalyzer {
  async analyzePerformance(
    changes: CodeChanges
  ): Promise<PerformanceAnalysis> {
    const issues: PerformanceIssue[] = [];
    
    for (const file of changes.files) {
      // Check algorithm complexity
      const complexityIssues = await this.analyzeAlgorithmComplexity(file);
      issues.push(...complexityIssues);
      
      // Detect N+1 query problems
      const queryIssues = await this.detectNPlusOneQueries(file);
      issues.push(...queryIssues);
      
      // Check for memory leaks
      const memoryIssues = await this.detectMemoryLeaks(file);
      issues.push(...memoryIssues);
      
      // Analyze async operations
      const asyncIssues = await this.analyzeAsyncOperations(file);
      issues.push(...asyncIssues);
      
      // Check caching opportunities
      const cachingOpportunities = await this.identifyCachingOpportunities(file);
      issues.push(...cachingOpportunities);
    }
    
    return {
      category: 'performance',
      issues: issues,
      impact: this.calculatePerformanceImpact(issues),
      optimizations: await this.suggestOptimizations(issues)
    };
  }
  
  private async analyzeAlgorithmComplexity(
    file: CodeFile
  ): Promise<PerformanceIssue[]> {
    const issues: PerformanceIssue[] = [];
    
    // Parse AST to analyze loops and recursive functions
    const ast = await this.parseAST(file.content);
    const functions = this.extractFunctions(ast);
    
    for (const func of functions) {
      const complexity = this.calculateComplexity(func);
      
      if (complexity.time > 'O(n²)') {
        issues.push({
          type: 'HIGH_COMPLEXITY',
          severity: 'major',
          file: file.path,
          line: func.line,
          description: `Function has ${complexity.time} time complexity`,
          impact: 'May cause performance issues with large datasets',
          suggestion: 'Consider optimizing algorithm or using more efficient data structures'
        });
      }
    }
    
    return issues;
  }
}

class ArchitectureValidator {
  async validateArchitecture(
    changes: CodeChanges,
    projectArchitecture: Architecture
  ): Promise<ArchitectureValidation> {
    const violations: ArchitectureViolation[] = [];
    
    // Check layer violations
    const layerViolations = await this.checkLayerViolations(
      changes,
      projectArchitecture.layers
    );
    violations.push(...layerViolations);
    
    // Validate dependency rules
    const dependencyViolations = await this.validateDependencies(
      changes,
      projectArchitecture.dependencyRules
    );
    violations.push(...dependencyViolations);
    
    // Check design pattern compliance
    const patternViolations = await this.checkDesignPatterns(
      changes,
      projectArchitecture.patterns
    );
    violations.push(...patternViolations);
    
    // Validate API contracts
    const apiViolations = await this.validateAPIContracts(
      changes,
      projectArchitecture.apiSpecs
    );
    violations.push(...apiViolations);
    
    return {
      category: 'architecture',
      violations: violations,
      compliance: this.calculateCompliance(violations),
      recommendations: await this.generateArchitectureRecommendations(violations)
    };
  }
}

// Review feedback
interface ReviewFeedback {
  type: 'REVIEW_FEEDBACK';
  from: 'reviewer-agent';
  to: 'coder-agent';
  payload: {
    pullRequestId: string;
    decision: 'approved' | 'changes_requested' | 'rejected';
    findings: Finding[];
    suggestions: Suggestion[];
    requiredChanges: RequiredChange[];
  };
}

// Clarification request
interface ClarificationRequest {
  type: 'CLARIFICATION_REQUEST';
  from: 'reviewer-agent';
  to: 'coder-agent';
  payload: {
    pullRequestId: string;
    questions: Question[];
    codeContext: CodeContext;
  };
}

// Review complete notification
interface ReviewCompleteNotification {
  type: 'REVIEW_COMPLETE';
  from: 'reviewer-agent';
  to: 'pm-agent';
  payload: {
    pullRequestId: string;
    decision: ReviewDecision;
    criticalFindings: number;
    estimatedFixTime: number;
    blockingIssues: Issue[];
  };
}

// Quality metrics report
interface QualityMetricsReport {
  type: 'QUALITY_METRICS';
  from: 'reviewer-agent';
  to: 'pm-agent';
  payload: {
    period: string;
    codeQualityScore: number;
    securityScore: number;
    technicalDebtTrend: Trend;
    topIssues: Issue[];
  };
}

class TDDComplianceAnalyzer {
  async analyzeTDDCompliance(
    changes: CodeChanges,
    pullRequest: PullRequest
  ): Promise<TDDAnalysis> {
    const violations: TDDViolation[] = [];
    
    // Check if tests exist for all new code
    const testCoverage = await this.verifyTestCoverage(changes);
    if (testCoverage.percentage < 100) {
      violations.push({
        type: 'MISSING_TESTS',
        severity: 'major',
        description: `Test coverage is ${testCoverage.percentage}%, should be 100%`,
        uncoveredCode: testCoverage.uncoveredLines
      });
    }
    
    // Verify tests were written first (check commit history)
    const testFirstViolations = await this.verifyTestFirst(pullRequest);
    violations.push(...testFirstViolations);
    
    // Check for mocks in tests
    const mockViolations = await this.checkForMocks(changes);
    violations.push(...mockViolations);
    
    // Verify tests are meaningful
    const meaningfulnessIssues = await this.verifyTestMeaningfulness(changes);
    violations.push(...meaningfulnessIssues);
    
    return {
      category: 'tdd_compliance',
      violations: violations,
      compliant: violations.length === 0,
      recommendations: await this.generateTDDRecommendations(violations)
    };
  }
  
  private async checkForMocks(
    changes: CodeChanges
  ): Promise<TDDViolation[]> {
    const violations: TDDViolation[] = [];
    
    for (const file of changes.files) {
      if (file.path.includes('.test.') || file.path.includes('.spec.')) {
        // Check for mock usage patterns
        const mockPatterns = [
          /mock\(/gi,
          /\.mock\(/gi,
          /jest\.mock/gi,
          /sinon\./gi,
          /createMock/gi,
          /@Mock/gi
        ];
        
        for (const pattern of mockPatterns) {
          const matches = file.content.matchAll(pattern);
          for (const match of matches) {
            violations.push({
              type: 'MOCK_USAGE',
              severity: 'major',
              file: file.path,
              line: this.getLineNumber(file.content, match.index),
              description: 'Mock usage detected - TDD requires real implementations',
              suggestion: 'Use real implementations instead of mocks'
            });
          }
        }
      }
    }
    
    return violations;
  }
}

interface ReviewerAgentMetrics {
  // Review efficiency
  averageReviewTime: number;           // minutes per PR
  reviewThroughput: number;            // PRs reviewed per day
  reviewIterations: number;            // avg iterations to approval
  
  // Review quality
  falsePositiveRate: number;           // % incorrect findings
  falseNegativeRate: number;           // % missed issues
  findingSeverityAccuracy: number;     // % correct severity
  
  // Impact metrics
  bugsPreventedRate: number;           // % bugs caught in review
  securityIssuesCaught: number;        // security issues per sprint
  performanceIssuesCaught: number;     // perf issues per sprint
  
  // Developer satisfaction
  feedbackQualityScore: number;        // 0-100 rating
  suggestionAdoptionRate: number;      // % suggestions implemented
  developerSatisfaction: number;       // 0-100 rating
}

class ReviewerPerformanceOptimizer {
  async optimizePerformance(
    metrics: ReviewerAgentMetrics
  ): Promise<Optimization[]> {
    const optimizations = [];
    
    // Optimize review speed
    if (metrics.averageReviewTime > 30) {
      optimizations.push({
        area: 'review_process',
        action: 'parallelize_analysis_tasks',
        expected: '40% faster reviews'
      });
    }
    
    // Improve accuracy
    if (metrics.falsePositiveRate > 0.15) {
      optimizations.push({
        area: 'detection_rules',
        action: 'tune_detection_thresholds',
        expected: '50% reduction in false positives'
      });
    }
    
    // Enhance feedback quality
    if (metrics.feedbackQualityScore < 80) {
      optimizations.push({
        area: 'feedback_generation',
        action: 'improve_suggestion_specificity',
        expected: '25% better satisfaction'
      });
    }
    
    return optimizations;
  }
}

enum ReviewerAgentError {
  PR_ACCESS_DENIED = 'PR_ACCESS_DENIED',
  ANALYSIS_TIMEOUT = 'ANALYSIS_TIMEOUT',
  INVALID_CODE_FORMAT = 'INVALID_CODE_FORMAT',
  RULE_CONFIGURATION_ERROR = 'RULE_CONFIGURATION_ERROR',
  DEPENDENCY_SCAN_FAILURE = 'DEPENDENCY_SCAN_FAILURE'
}

class ReviewerErrorHandler {
  async handle(
    error: ReviewerAgentError,
    context: ErrorContext
  ): Promise<Resolution> {
    switch (error) {
      case ReviewerAgentError.PR_ACCESS_DENIED:
        return await this.requestPRAccess(context);
        
      case ReviewerAgentError.ANALYSIS_TIMEOUT:
        return await this.splitAnalysisTask(context);
        
      case ReviewerAgentError.INVALID_CODE_FORMAT:
        return await this.attemptCodeParsing(context);
        
      case ReviewerAgentError.DEPENDENCY_SCAN_FAILURE:
        return await this.fallbackDependencyCheck(context);
        
      default:
        return await this.notifyPMAgent(error, context);
    }
  }
}

import { CodeReviewerAgent } from '@autosdlc/agents';

const agent = new CodeReviewerAgent({
  id: 'reviewer-001',
  mcpServerUrl: process.env.MCP_SERVER_URL,
  config: {
    reviewDepth: 'standard',
    autoApproveEnabled: true,
    securityScanLevel: 'comprehensive',
    performanceAnalysis: true
  }
});

await agent.initialize();
await agent.start();

console.log('Code Reviewer Agent ready for reviews');

// Listen for review requests
agent.on('task:review_pull_request', async (task) => {
  try {
    const pr = task.payload.pullRequest;
    
    // Perform comprehensive review
    const reviewResult = await agent.reviewPullRequest(pr);
    
    // Send feedback to coder
    await agent.sendFeedback({
      to: pr.authorAgentId,
      pullRequestId: pr.id,
      result: reviewResult
    });
    
    // Update PR status
    await agent.updatePRStatus(pr.id, reviewResult.decision);
    
    // Notify PM of completion
    await agent.notifyReviewComplete(task.id, reviewResult);
    
  } catch (error) {
    await agent.handleError(error, task);
  }
});