export class CoderAgent extends BaseAgent {
  private codeGenerator: CodeGenerator;
  private testRunner: TestRunner;
  private tddImplementer: TDDImplementer;
  private documentationEngine: DocumentationEngine;
  private codeAnalyzer: CodeAnalyzer;
  private workingDir: string = './agents/coder-agent';
  
  constructor(config: CoderAgentConfig) {
    super(config);
    this.type = AgentType.CODER;
    this.capabilities = [
      'tdd_implementation',
      'code_generation',
      'test_verification',
      'documentation_writing',
      'refactoring',
      'bug_fixing',
      'api_development'
    ];
  }
  
  async initialize(): Promise<void> {
    await super.initialize();
    await this.loadLanguageModels();
    await this.initializeCodeTemplates();
    await this.setupDevelopmentEnvironment();
    await this.initializeClaudeCode();
    await this.startMCPServer(8083); // Agent as MCP server
  }
  
  async processTask(task: Task): Promise<TaskResult> {
    // Update Agent_Output.md with task start
    await this.updateAgentOutput({
      status: 'processing',
      currentTask: task.type,
      timestamp: new Date()
    });
    
    let result: TaskResult;
    switch (task.type) {
      case 'tdd_implementation':
        result = await this.implementWithTDD(task);
        break;
      case 'implement_feature':
        result = await this.implementFeature(task);
        break;
      case 'fix_bug':
        result = await this.fixBug(task);
        break;
      case 'verify_tests_red':
        result = await this.verifyTestsRed(task);
        break;
      case 'refactor_code':
        result = await this.refactorCode(task);
        break;
      case 'generate_documentation':
        result = await this.generateDocumentation(task);
        break;
      default:
        throw new Error(`Unknown task type: ${task.type}`);
    }
    
    // Update Agent_Output.md with task completion
    await this.updateAgentOutput({
      status: 'idle',
      lastCompletedTask: task.type,
      lastResult: result.success ? 'success' : 'failed',
      testStatus: result.testsPassing ? 'green' : 'red',
      timestamp: new Date()
    });
    
    return result;
  }
}

interface CoderAgentState extends AgentState {
  currentImplementation: Implementation;
  codebaseContext: CodebaseContext;
  testCoverage: TestCoverage;
  technicalDebt: TechnicalDebt[];
  performanceMetrics: CodePerformanceMetrics;
}

interface Implementation {
  id: string;
  taskId: string;
  githubIssue: number;
  branch: string;
  files: ImplementedFile[];
  tests: TestFile[];
  status: ImplementationStatus;
  pullRequestUrl?: string;
}

interface CodebaseContext {
  projectStructure: ProjectStructure;
  dependencies: Dependency[];
  codingStandards: CodingStandard[];
  architecturePatterns: Pattern[];
  existingAPIs: API[];
}

class CodeGenerator {
  async generateCode(
    specification: TechnicalSpecification,
    context: CodebaseContext
  ): Promise<GeneratedCode> {
    // Analyze specification
    const analysis = await this.analyzeSpecification(specification);
    
    // Determine implementation approach
    const approach = await this.determineApproach(analysis, context);
    
    // Generate code structure
    const structure = await this.generateStructure(approach);
    
    // Implement each component
    const implementations = await Promise.all(
      structure.components.map(component => 
        this.implementComponent(component, context)
      )
    );
    
    // Integrate components
    const integratedCode = await this.integrateComponents(implementations);
    
    // Optimize and refine
    return await this.optimizeCode(integratedCode);
  }
  
  private async implementComponent(
    component: Component,
    context: CodebaseContext
  ): Promise<ComponentImplementation> {
    const template = await this.selectTemplate(component.type);
    const customized = await this.customizeTemplate(template, component);
    const validated = await this.validateImplementation(customized);
    
    return {
      component: component,
      code: validated,
      dependencies: await this.resolveDependencies(component),
      interfaces: await this.defineInterfaces(component)
    };
  }
}

class TDDImplementer {
  async implementWithTDD(
    failingTests: TestSuite,
    specification: TechnicalSpecification
  ): Promise<TDDImplementation> {
    // Step 1: Verify all tests are red
    const redVerification = await this.verifyTestsRed(failingTests);
    if (!redVerification.allRed) {
      throw new Error('Not all tests are failing. Cannot proceed with TDD.');
    }
    
    // Step 2: Analyze failing tests to understand requirements
    const requirements = await this.analyzeTestRequirements(failingTests);
    
    // Step 3: Implement minimal code to pass tests
    let implementation = await this.implementMinimalCode(requirements);
    
    // Step 4: Run tests iteratively until all pass
    let testResults = await this.runTests(failingTests, implementation);
    let iterations = 0;
    
    while (!testResults.allPassing && iterations < 10) {
      // Analyze failures and adjust implementation
      const failures = this.analyzeFailures(testResults);
      implementation = await this.adjustImplementation(implementation, failures);
      
      // Re-run tests
      testResults = await this.runTests(failingTests, implementation);
      iterations++;
      
      // Update progress in Agent_Output.md
      await this.updateTDDProgress({
        iteration: iterations,
        passingTests: testResults.passing,
        totalTests: testResults.total,
        currentStatus: 'implementing'
      });
    }
    
    // Step 5: Refactor while keeping tests green
    const refactoredCode = await this.refactorCode(implementation, failingTests);
    
    // Verify tests still pass after refactoring
    const finalResults = await this.runTests(failingTests, refactoredCode);
    if (!finalResults.allPassing) {
      throw new Error('Refactoring broke tests!');
    }
    
    return {
      implementation: refactoredCode,
      testResults: finalResults,
      iterations: iterations,
      coverage: await this.calculateCoverage(refactoredCode)
    };
  }
  
  private async verifyTestsRed(tests: TestSuite): Promise<RedVerification> {
    // Run tests without any implementation
    const results = await this.testRunner.run(tests, null);
    
    return {
      allRed: results.failing === results.total,
      results: results,
      missingTests: results.total === 0
    };
  }
  
  private async implementMinimalCode(
    requirements: TestRequirements
  ): Promise<Implementation> {
    // Implement just enough to make tests pass
    const minimalImpl = {
      files: [],
      dependencies: requirements.dependencies
    };
    
    for (const req of requirements.functionRequirements) {
      const impl = await this.implementFunction(req, {
        minimal: true,
        noExtraFeatures: true,
        justPassTests: true
      });
      minimalImpl.files.push(impl);
    }
    
    return minimalImpl;
  }
}

// Test Runner without mocks
class TestRunner {
  async run(
    tests: TestSuite,
    implementation: Implementation | null
  ): Promise<TestResults> {
    // Set up real test environment
    const testEnv = await this.setupRealEnvironment();
    
    // Deploy implementation if provided
    if (implementation) {
      await this.deployImplementation(implementation, testEnv);
    }
    
    // Run tests against real implementation
    const results = {
      total: tests.tests.length,
      passing: 0,
      failing: 0,
      failures: []
    };
    
    for (const test of tests.tests) {
      try {
        // Run test without mocks
        await this.executeTest(test, testEnv);
        results.passing++;
      } catch (error) {
        results.failing++;
        results.failures.push({
          test: test.name,
          error: error.message,
          stack: error.stack
        });
      }
    }
    
    // Clean up
    await this.teardownEnvironment(testEnv);
    
    return results;
  }
}

class BugFixer {
  async fixBug(
    bugReport: BugReport,
    codebase: Codebase
  ): Promise<BugFix> {
    // Reproduce the bug
    const reproduction = await this.reproduceBug(bugReport);
    
    // Identify root cause
    const rootCause = await this.identifyRootCause(reproduction, codebase);
    
    // Generate fix strategies
    const strategies = await this.generateFixStrategies(rootCause);
    
    // Implement best strategy
    const implementation = await this.implementFix(
      strategies[0], 
      rootCause
    );
    
    // Verify fix
    const verification = await this.verifyFix(implementation, bugReport);
    
    // Add regression tests
    const regressionTests = await this.createRegressionTests(
      bugReport, 
      implementation
    );
    
    return {
      bug: bugReport,
      rootCause: rootCause,
      fix: implementation,
      tests: regressionTests,
      verification: verification
    };
  }
}

class CodeRefactorer {
  async refactorCode(
    code: Code,
    goals: RefactoringGoal[]
  ): Promise<RefactoredCode> {
    // Analyze current code
    const analysis = await this.analyzeCode(code);
    
    // Identify refactoring opportunities
    const opportunities = await this.identifyOpportunities(analysis, goals);
    
    // Plan refactoring steps
    const plan = await this.createRefactoringPlan(opportunities);
    
    // Execute refactoring
    let refactoredCode = code;
    for (const step of plan.steps) {
      refactoredCode = await this.executeRefactoringStep(
        step, 
        refactoredCode
      );
      
      // Ensure tests still pass
      const testsPass = await this.runTests(refactoredCode);
      if (!testsPass) {
        throw new Error(`Refactoring broke tests at step: ${step.name}`);
      }
    }
    
    // Verify improvements
    const improvements = await this.measureImprovements(
      code, 
      refactoredCode
    );
    
    return {
      original: code,
      refactored: refactoredCode,
      improvements: improvements,
      plan: plan
    };
  }
}

// Task receipt acknowledgment
interface TaskAcknowledgment {
  type: 'TASK_ACKNOWLEDGED';
  from: 'coder-agent';
  to: 'pm-agent';
  payload: {
    taskId: string;
    estimatedCompletion: Date;
    dependencies: string[];
    risks: Risk[];
  };
}

// Implementation complete notification
interface ImplementationComplete {
  type: 'IMPLEMENTATION_COMPLETE';
  from: 'coder-agent';
  to: 'pm-agent';
  payload: {
    taskId: string;
    pullRequestUrl: string;
    filesChanged: number;
    testCoverage: number;
    documentation: boolean;
  };
}

// Review request
interface ReviewRequest {
  type: 'REVIEW_REQUEST';
  from: 'coder-agent';
  to: 'reviewer-agent';
  payload: {
    pullRequestId: string;
    urgency: 'low' | 'medium' | 'high';
    focusAreas: string[];
    context: ReviewContext;
  };
}

// Review feedback response
interface ReviewFeedbackResponse {
  type: 'FEEDBACK_ADDRESSED';
  from: 'coder-agent';
  to: 'reviewer-agent';
  payload: {
    pullRequestId: string;
    feedbackId: string;
    changes: Change[];
    explanation: string;
  };
}

interface CoderAgentMetrics {
  // Productivity metrics
  linesOfCodePerHour: number;
  featuresImplementedPerSprint: number;
  averageImplementationTime: number;
  
  // Quality metrics
  defectDensity: number;              // bugs per 1000 lines
  testCoverage: number;               // percentage
  codeComplexity: number;             // cyclomatic complexity
  documentationCompleteness: number;   // percentage
  
  // Efficiency metrics
  firstTimeSuccessRate: number;       // % PRs approved without changes
  reworkRate: number;                 // % code requiring changes
  buildSuccessRate: number;           // % builds passing
  
  // Collaboration metrics
  reviewTurnaroundTime: number;       // hours
  communicationResponseTime: number;   // minutes
}

class CoderPerformanceOptimizer {
  async optimizePerformance(
    metrics: CoderAgentMetrics
  ): Promise<Optimization[]> {
    const optimizations = [];
    
    // Optimize code quality
    if (metrics.defectDensity > 5) {
      optimizations.push({
        area: 'testing',
        action: 'increase_test_coverage',
        expected: '40% reduction in defects'
      });
    }
    
    // Optimize productivity
    if (metrics.averageImplementationTime > 240) { // 4 hours
      optimizations.push({
        area: 'templates',
        action: 'expand_code_templates',
        expected: '30% faster implementation'
      });
    }
    
    // Optimize collaboration
    if (metrics.firstTimeSuccessRate < 0.7) {
      optimizations.push({
        area: 'standards',
        action: 'improve_coding_standards_adherence',
        expected: '25% improvement in first-time success'
      });
    }
    
    return optimizations;
  }
}

enum CoderAgentError {
  SPECIFICATION_UNCLEAR = 'SPECIFICATION_UNCLEAR',
  DEPENDENCY_CONFLICT = 'DEPENDENCY_CONFLICT',
  TEST_FAILURE = 'TEST_FAILURE',
  BUILD_FAILURE = 'BUILD_FAILURE',
  MERGE_CONFLICT = 'MERGE_CONFLICT',
  PERFORMANCE_REGRESSION = 'PERFORMANCE_REGRESSION'
}

class CoderAgentErrorHandler {
  async handle(
    error: CoderAgentError, 
    context: ErrorContext
  ): Promise<Resolution> {
    switch (error) {
      case CoderAgentError.SPECIFICATION_UNCLEAR:
        return await this.requestClarification(context);
        
      case CoderAgentError.DEPENDENCY_CONFLICT:
        return await this.resolveDependencyConflict(context);
        
      case CoderAgentError.TEST_FAILURE:
        return await this.debugAndFixTests(context);
        
      case CoderAgentError.MERGE_CONFLICT:
        return await this.resolveMergeConflict(context);
        
      case CoderAgentError.PERFORMANCE_REGRESSION:
        return await this.optimizePerformance(context);
        
      default:
        return await this.escalateToPM(error, context);
    }
  }
}

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

const agent = new CoderAgent({
  id: 'coder-001',
  mcpServerUrl: process.env.MCP_SERVER_URL,
  config: {
    languages: ['typescript', 'python'],
    frameworks: ['react', 'fastapi'],
    testingFramework: 'jest',
    codeQuality: {
      linting: true,
      formatting: true,
      coverageThreshold: 80
    }
  }
});

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

console.log('Coder Agent ready for implementation tasks');

// Listen for implementation tasks
agent.on('task:implement_feature', async (task) => {
  try {
    // Parse GitHub issue
    const issue = await agent.parseGitHubIssue(task.payload.issueNumber);
    
    // Create feature branch
    await agent.createFeatureBranch(issue);
    
    // Implement feature
    const implementation = await agent.implementFeature({
      specification: task.payload.specification,
      issue: issue,
      context: await agent.getCodebaseContext()
    });
    
    // Write tests
    const tests = await agent.writeTests(implementation);
    
    // Create pull request
    const pr = await agent.createPullRequest({
      implementation,
      tests,
      issue
    });
    
    // Notify completion
    await agent.notifyCompletion(task.id, pr);
  } catch (error) {
    await agent.handleError(error, task);
  }
});