import { Logger } from '../utils/logger';

/**
 * @interface TestRunnerConfig
 * @description Configuration for the Comprehensive Test Runner.
 */
export interface TestRunnerConfig {
  testCoverageTarget: number; // e.g., 0.95 for 95%
  performanceSlaMs: number; // e.g., 100 for 100ms
  // Add paths to test directories, reporting options, etc.
}

/**
 * @interface TestRunnerOperations
 * @description Defines operations for running a comprehensive test suite.
 */
export interface TestRunnerOperations {
  runAllTests(): Promise<any>;
  runUnitTests(): Promise<any>;
  runIntegrationTests(): Promise<any>;
  runPerformanceTests(): Promise<any>;
  runSecurityTests(): Promise<any>;
  generateReport(): Promise<any>;
}

/**
 * @class ComprehensiveTestRunner
 * @description Orchestrates and executes a comprehensive test suite including unit, integration, performance, and security tests.
 */
export class ComprehensiveTestRunner implements TestRunnerOperations {
  private config: TestRunnerConfig;
  private logger: Logger;

  constructor(config: TestRunnerConfig) {
    this.config = config;
    this.logger = new Logger('ComprehensiveTestRunner');
    this.logger.info('Comprehensive Test Runner initialized.');
  }

  /**
   * Runs all types of tests (unit, integration, performance, security).
   * @returns {Promise<any>} Consolidated test results.
   */
  public async runAllTests(): Promise<any> {
    this.logger.info('Running all tests...');
    const unitResults = await this.runUnitTests();
    const integrationResults = await this.runIntegrationTests();
    const performanceResults = await this.runPerformanceTests();
    const securityResults = await this.runSecurityTests();

    const overallResults = {
      unit: unitResults,
      integration: integrationResults,
      performance: performanceResults,
      security: securityResults,
      overallCoverage: this.calculateOverallCoverage(unitResults, integrationResults),
      performanceMet: performanceResults.overallLatencyMs <= this.config.performanceSlaMs,
    };
    this.logger.info('All tests completed.', overallResults);
    return overallResults;
  }

  /**
   * Runs unit tests.
   * @returns {Promise<any>} Unit test results.
   */
  public async runUnitTests(): Promise<any> {
    this.logger.info('Running unit tests (conceptual)...');
    // In a real scenario, this would invoke a test runner like Jest or Mocha.
    await new Promise(resolve => setTimeout(resolve, 500));
    const results = { passed: 95, failed: 5, coverage: 0.92 };
    this.logger.debug('Unit test results:', results);
    return results;
  }

  /**
   * Runs integration tests.
   * @returns {Promise<any>} Integration test results.
   */
  public async runIntegrationTests(): Promise<any> {
    this.logger.info('Running integration tests (conceptual)...');
    // This would involve testing interactions between components and GCP services.
    await new Promise(resolve => setTimeout(resolve, 1000));
    const results = { passed: 80, failed: 2, coverage: 0.85 };
    this.logger.debug('Integration test results:', results);
    return results;
  }

  /**
   * Runs performance tests (load, stress, latency).
   * @returns {Promise<any>} Performance test results.
   */
  public async runPerformanceTests(): Promise<any> {
    this.logger.info('Running performance tests (conceptual)...');
    // This would involve tools like JMeter, K6, or custom load generators.
    await new Promise(resolve => setTimeout(resolve, 1500));
    const results = { overallLatencyMs: 85, throughputOpsPerSec: 1200, memoryUsageMb: 500 };
    this.logger.debug('Performance test results:', results);
    return results;
  }

  /**
   * Runs security tests (penetration, vulnerability scans).
   * @returns {Promise<any>} Security test results.
   */
  public async runSecurityTests(): Promise<any> {
    this.logger.info('Running security tests (conceptual)...');
    // This would involve tools like OWASP ZAP, Nessus, or custom security scripts.
    await new Promise(resolve => setTimeout(resolve, 1200));
    const results = { vulnerabilitiesFound: 3, criticalVulnerabilities: 0, complianceScore: 0.98 };
    this.logger.debug('Security test results:', results);
    return results;
  }

  /**
   * Generates a comprehensive test report.
   * @returns {Promise<any>} The test report.
   */
  public async generateReport(): Promise<any> {
    this.logger.info('Generating comprehensive test report (conceptual)...');
    // This would aggregate results from all test types into a human-readable report.
    await new Promise(resolve => setTimeout(resolve, 300));
    const report = { summary: 'All tests passed with minor issues.', details: 'See attached logs.' };
    this.logger.debug('Test report generated.', report);
    return report;
  }

  /**
   * Calculates overall test coverage.
   * @param {any} unitResults Unit test results.
   * @param {any} integrationResults Integration test results.
   * @returns {number} Overall coverage percentage.
   */
  private calculateOverallCoverage(unitResults: any, integrationResults: any): number {
    const totalCoverage = (unitResults.coverage * 0.6 + integrationResults.coverage * 0.4); // Weighted average
    return parseFloat(totalCoverage.toFixed(2));
  }
}