import { Request, Response } from 'express';
import { JwtPayload } from 'jsonwebtoken';

export class SecurityTestService {
  /**
   * 测试接口安全
   * @param params 测试参数
   * @param traceInfo 追踪信息
   * @returns 安全测试结果
   */
  public static async testApiSecurity(
    params: {
      endpoints: Array<{
        url: string;
        method: 'GET' | 'POST' | 'PUT' | 'DELETE';
        headers?: Record<string, string>;
        body?: any;
      }>;
      securityStandards: string[];
    },
    traceInfo: {
      tenantId: string;
      shopId: string;
      taskId: string;
      traceId: string;
      businessType: 'TOC' | 'TOB';
    }
  ): Promise<{
    timestamp: string;
    endpointsTested: number;
    securityIssuesFound: number;
    results: Array<{
      endpoint: string;
      method: string;
      issues: Array<{
        type: string;
        severity: 'high' | 'medium' | 'low';
        description: string;
        recommendation: string;
      }>;
      status: 'secure' | 'insecure' | 'warning';
    }>;
    recommendations: string[];
  }> {
    try {
      const timestamp = new Date().toISOString();
      const results = [];
      let securityIssuesFound = 0;
      
      for (const endpoint of params.endpoints) {
        // 模拟接口安全测试
        const issues = [];
        
        // 检查是否使用HTTPS
        if (!endpoint.url.startsWith('https://')) {
          issues.push({
            type: 'insecure_transport',
            severity: 'high' as 'high',
            description: 'Endpoint uses HTTP instead of HTTPS',
            recommendation: 'Use HTTPS for all API endpoints',
          });
          securityIssuesFound++;
        }
        
        // 检查是否有CSRF保护
        if (!endpoint.headers?.['X-CSRF-Token']) {
          issues.push({
            type: 'csrf_vulnerability',
            severity: 'medium' as 'medium',
            description: 'Missing CSRF token header',
            recommendation: 'Implement CSRF token protection',
          });
          securityIssuesFound++;
        }
        
        // 检查是否有内容安全策略
        if (!endpoint.headers?.['Content-Security-Policy']) {
          issues.push({
            type: 'missing_csp',
            severity: 'low' as 'low',
            description: 'Missing Content-Security-Policy header',
            recommendation: 'Add Content-Security-Policy header',
          });
          securityIssuesFound++;
        }
        
        let status: 'secure' | 'insecure' | 'warning' = 'secure';
        if (issues.length > 0) {
          const hasHighSeverity = issues.some(issue => issue.severity === 'high');
          status = hasHighSeverity ? 'insecure' : 'warning';
        }
        
        results.push({
          endpoint: endpoint.url,
          method: endpoint.method,
          issues,
          status,
        });
      }
      
      // 生成安全建议
      const recommendations = [
        'Use HTTPS for all API endpoints',
        'Implement CSRF token protection',
        'Add Content-Security-Policy header',
        'Implement rate limiting to prevent brute force attacks',
        'Use strong password hashing algorithms',
        'Implement proper error handling to avoid information disclosure',
      ];
      
      return {
        timestamp,
        endpointsTested: params.endpoints.length,
        securityIssuesFound,
        results,
        recommendations,
      };
    } catch (error) {
      console.error('Error testing API security:', error);
      throw new Error('Failed to test API security');
    }
  }

  /**
   * 测试认证安全性
   * @param params 测试参数
   * @param traceInfo 追踪信息
   * @returns 认证安全测试结果
   */
  public static async testAuthenticationSecurity(
    params: {
      authEndpoints: Array<{
        url: string;
        method: 'GET' | 'POST' | 'PUT' | 'DELETE';
        body?: any;
      }>;
    },
    traceInfo: {
      tenantId: string;
      shopId: string;
      taskId: string;
      traceId: string;
      businessType: 'TOC' | 'TOB';
    }
  ): Promise<{
    timestamp: string;
    authEndpointsTested: number;
    securityIssuesFound: number;
    results: Array<{
      endpoint: string;
      method: string;
      issues: Array<{
        type: string;
        severity: 'high' | 'medium' | 'low';
        description: string;
        recommendation: string;
      }>;
      status: 'secure' | 'insecure' | 'warning';
    }>;
  }> {
    try {
      const timestamp = new Date().toISOString();
      const results = [];
      let securityIssuesFound = 0;
      
      for (const endpoint of params.authEndpoints) {
        // 模拟认证安全测试
        const issues = [];
        
        // 检查密码强度要求
        if (endpoint.body?.password && endpoint.body.password.length < 8) {
          issues.push({
            type: 'weak_password',
            severity: 'high' as 'high',
            description: 'Password length is less than 8 characters',
            recommendation: 'Enforce minimum password length of 8 characters',
          });
          securityIssuesFound++;
        }
        
        // 检查是否使用HTTPS
        if (!endpoint.url.startsWith('https://')) {
          issues.push({
            type: 'insecure_transport',
            severity: 'high' as 'high',
            description: 'Authentication endpoint uses HTTP instead of HTTPS',
            recommendation: 'Use HTTPS for all authentication endpoints',
          });
          securityIssuesFound++;
        }
        
        let status: 'secure' | 'insecure' | 'warning' = 'secure';
        if (issues.length > 0) {
          const hasHighSeverity = issues.some(issue => issue.severity === 'high');
          status = hasHighSeverity ? 'insecure' : 'warning';
        }
        
        results.push({
          endpoint: endpoint.url,
          method: endpoint.method,
          issues,
          status,
        });
      }
      
      return {
        timestamp,
        authEndpointsTested: params.authEndpoints.length,
        securityIssuesFound,
        results,
      };
    } catch (error) {
      console.error('Error testing authentication security:', error);
      throw new Error('Failed to test authentication security');
    }
  }

  /**
   * 测试授权安全性
   * @param params 测试参数
   * @param traceInfo 追踪信息
   * @returns 授权安全测试结果
   */
  public static async testAuthorizationSecurity(
    params: {
      protectedEndpoints: Array<{
        url: string;
        method: 'GET' | 'POST' | 'PUT' | 'DELETE';
        requiredRole: string;
        testRoles: string[];
      }>;
    },
    traceInfo: {
      tenantId: string;
      shopId: string;
      taskId: string;
      traceId: string;
      businessType: 'TOC' | 'TOB';
    }
  ): Promise<{
    timestamp: string;
    protectedEndpointsTested: number;
    authorizationIssuesFound: number;
    results: Array<{
      endpoint: string;
      method: string;
      requiredRole: string;
      testResults: Array<{
        role: string;
        authorized: boolean;
        expected: boolean;
        passed: boolean;
      }>;
      status: 'secure' | 'insecure' | 'warning';
    }>;
  }> {
    try {
      const timestamp = new Date().toISOString();
      const results = [];
      let authorizationIssuesFound = 0;
      
      for (const endpoint of params.protectedEndpoints) {
        // 模拟授权安全测试
        const testResults = [];
        
        for (const role of endpoint.testRoles) {
          const authorized = role === endpoint.requiredRole || role === 'ADMIN';
          const expected = role === endpoint.requiredRole || role === 'ADMIN';
          const passed = authorized === expected;
          
          if (!passed) {
            authorizationIssuesFound++;
          }
          
          testResults.push({
            role,
            authorized,
            expected,
            passed,
          });
        }
        
        const allPassed = testResults.every(result => result.passed);
        const status: 'secure' | 'insecure' | 'warning' = allPassed ? 'secure' : 'insecure';
        
        results.push({
          endpoint: endpoint.url,
          method: endpoint.method,
          requiredRole: endpoint.requiredRole,
          testResults,
          status,
        });
      }
      
      return {
        timestamp,
        protectedEndpointsTested: params.protectedEndpoints.length,
        authorizationIssuesFound,
        results,
      };
    } catch (error) {
      console.error('Error testing authorization security:', error);
      throw new Error('Failed to test authorization security');
    }
  }

  /**
   * 生成安全报告
   * @param params 报告参数
   * @param traceInfo 追踪信息
   * @returns 安全报告
   */
  public static async generateSecurityReport(
    params: {
      testResults: {
        apiSecurity?: any;
        authenticationSecurity?: any;
        authorizationSecurity?: any;
      };
    },
    traceInfo: {
      tenantId: string;
      shopId: string;
      taskId: string;
      traceId: string;
      businessType: 'TOC' | 'TOB';
    }
  ): Promise<{
    reportId: string;
    timestamp: string;
    summary: {
      totalTests: number;
      passedTests: number;
      failedTests: number;
      securityScore: number;
    };
    findings: Array<{
      category: string;
      issues: Array<{
        type: string;
        severity: 'high' | 'medium' | 'low';
        description: string;
        recommendation: string;
      }>;
    }>;
    recommendations: string[];
  }> {
    try {
      const reportId = `SECURITY-REPORT-${Date.now()}`;
      const timestamp = new Date().toISOString();
      const findings = [];
      let totalTests = 0;
      let failedTests = 0;
      
      // 处理API安全测试结果
      if (params.testResults.apiSecurity) {
        totalTests += params.testResults.apiSecurity.endpointsTested;
        failedTests += params.testResults.apiSecurity.securityIssuesFound;
        findings.push({
          category: 'API Security',
          issues: params.testResults.apiSecurity.results.flatMap(result => 
            result.issues.map(issue => ({
              type: issue.type,
              severity: issue.severity,
              description: issue.description,
              recommendation: issue.recommendation,
            }))
          ),
        });
      }
      
      // 处理认证安全测试结果
      if (params.testResults.authenticationSecurity) {
        totalTests += params.testResults.authenticationSecurity.authEndpointsTested;
        failedTests += params.testResults.authenticationSecurity.securityIssuesFound;
        findings.push({
          category: 'Authentication Security',
          issues: params.testResults.authenticationSecurity.results.flatMap(result => 
            result.issues.map(issue => ({
              type: issue.type,
              severity: issue.severity,
              description: issue.description,
              recommendation: issue.recommendation,
            }))
          ),
        });
      }
      
      // 处理授权安全测试结果
      if (params.testResults.authorizationSecurity) {
        totalTests += params.testResults.authorizationSecurity.protectedEndpointsTested;
        failedTests += params.testResults.authorizationSecurity.authorizationIssuesFound;
        findings.push({
          category: 'Authorization Security',
          issues: params.testResults.authorizationSecurity.results.flatMap(result => 
            result.testResults
              .filter(test => !test.passed)
              .map(test => ({
                type: 'authorization_bypass',
                severity: 'high' as 'high',
                description: `Role ${test.role} was ${test.authorized ? 'authorized' : 'denied'} access to endpoint ${result.endpoint}`,
                recommendation: 'Ensure proper authorization checks for all protected endpoints',
              }))
          ),
        });
      }
      
      const passedTests = totalTests - failedTests;
      const securityScore = totalTests > 0 ? Math.round((passedTests / totalTests) * 100) : 0;
      
      // 生成安全建议
      const recommendations = [
        'Implement HTTPS for all API endpoints',
        'Add CSRF token protection for state-changing requests',
        'Implement rate limiting to prevent brute force attacks',
        'Use strong password hashing algorithms',
        'Implement proper error handling to avoid information disclosure',
        'Regularly update dependencies to patch security vulnerabilities',
        'Implement a web application firewall (WAF)',
        'Conduct regular security audits and penetration testing',
      ];
      
      return {
        reportId,
        timestamp,
        summary: {
          totalTests,
          passedTests,
          failedTests,
          securityScore,
        },
        findings,
        recommendations,
      };
    } catch (error) {
      console.error('Error generating security report:', error);
      throw new Error('Failed to generate security report');
    }
  }
}
