// CND Enterprise Integration Test
import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import { CND } from '../../dist/index.js';
import type { CNDConfig } from '../types.js';

describe('CND Enterprise Integration', () => {
  let cnd: CND;

  const testConfig: CNDConfig = {
    cbd: {
      host: 'localhost',
      port: 5000,
      database: 'test_db'
    },
    enterprise: {
      enabled: true,
      features: {
        serviceDiscovery: true,
        authentication: true,
        authorization: true,
        encryption: false, // Disabled for testing
        audit: true,
        monitoring: true,
        backup: false,
        clustering: false
      }
    },
    auth: {
      enabled: true,
      provider: 'internal',
      config: {
        secret: 'test-secret-key'
      },
      rbac: {
        enabled: true,
        roles: {
          admin: ['*'],
          user: ['read', 'write'],
          guest: ['read']
        },
        permissions: {
          'read': ['SELECT', 'VIEW'],
          'write': ['INSERT', 'UPDATE'],
          'admin': ['*']
        }
      }
    },
    serviceDiscovery: {
      enabled: true,
      serviceName: 'cnd-test',
      healthCheckInterval: 10000,
      tags: ['database', 'test']
    },
    security: {
      audit: {
        enabled: true,
        storage: 'database',
        retention: 30
      },
      rateLimit: {
        enabled: false, // Disabled for testing
        windowMs: 60000,
        maxRequests: 1000
      },
      encryption: {
        enabled: false,
        algorithm: 'aes-256-gcm'
      }
    },
    performance: {
      monitoring: {
        enabled: true,
        metricsPort: 9091 // Different port for testing
      }
    },
    realtime: {
      enabled: false // Disabled for testing
    },
    cache: {
      enabled: true,
      ttl: 300,
      distributed: false
    },
    logging: {
      enabled: true,
      level: 'info'
    }
  };

  beforeAll(async () => {
    // Skip connection for unit tests - would need real CBD instance
    cnd = new CND(testConfig);
    console.log('CND Enterprise instance created for testing');
  });

  afterAll(async () => {
    // Clean up if connected
    console.log('Test cleanup completed');
  });

  describe('Enterprise Features', () => {
    it('should initialize with enterprise features enabled', () => {
      expect(cnd.isEnterpriseEnabled()).toBe(true);
    });

    it('should list enabled features', () => {
      const features = cnd.getEnabledFeatures();
      expect(features).toContain('serviceDiscovery');
      expect(features).toContain('authentication');
      expect(features).toContain('audit');
      expect(features).toContain('monitoring');
    });

    it('should provide health check endpoint data structure', async () => {
      const healthCheck = await cnd.getHealthCheck();

      expect(healthCheck).toHaveProperty('status');
      expect(healthCheck).toHaveProperty('timestamp');
      expect(healthCheck).toHaveProperty('version');
      expect(healthCheck).toHaveProperty('uptime');
      expect(healthCheck).toHaveProperty('features');

      expect(healthCheck.features).toBeInstanceOf(Array);
      expect(healthCheck.features.length).toBeGreaterThan(0);
    });
  });

  describe('Authentication System', () => {
    it('should handle authentication without connection', async () => {
      // Mock authentication test - would need real implementation
      try {
        await cnd.authenticate('test', 'password');
      } catch (error) {
        // Expected to fail without connection
        expect(error.message).toContain('Authentication');
      }
    });

    it('should handle token validation without connection', async () => {
      try {
        await cnd.authenticateToken('fake-token');
      } catch (error) {
        // Expected to fail without connection
        expect(error.message).toContain('Authentication');
      }
    });

    it('should handle session validation', async () => {
      try {
        await cnd.validateSession('test-session-id');
      } catch (error) {
        // Expected to fail without connection
        expect(error.message).toContain('Authentication');
      }
    });
  });

  describe('Service Discovery', () => {
    it('should provide service discovery methods', () => {
      const services = cnd.findServices('test-service');
      expect(services).toBeInstanceOf(Array);
      expect(services.length).toBe(0); // No services without connection
    });

    it('should find services by tag', () => {
      const services = cnd.findServicesByTag('database');
      expect(services).toBeInstanceOf(Array);
    });

    it('should handle load balancing', () => {
      const instance = cnd.getNextInstance('test-service');
      expect(instance).toBeNull(); // No instances without connection
    });
  });

  describe('Metrics and Monitoring', () => {
    it('should provide health status', () => {
      const health = cnd.getHealthStatus();
      expect(health).toHaveProperty('status');
      expect(health).toHaveProperty('checks');
      expect(['healthy', 'warning', 'critical', 'unknown']).toContain(health.status);
    });

    it('should provide current metrics', () => {
      const metrics = cnd.getCurrentMetrics();
      // May be undefined without connection, but method should exist
      if (metrics) {
        expect(metrics).toHaveProperty('timestamp');
        expect(metrics).toHaveProperty('memory');
        expect(metrics).toHaveProperty('api');
      }
    });

    it('should export Prometheus metrics', () => {
      const prometheusMetrics = cnd.exportPrometheusMetrics();
      expect(typeof prometheusMetrics).toBe('string');
    });

    it('should provide metrics history', () => {
      const history = cnd.getMetricsHistory();
      expect(history).toBeInstanceOf(Array);
    });
  });

  describe('Audit System', () => {
    it('should provide audit log methods', async () => {
      const userLogs = await cnd.getUserAuditLogs('test-user');
      expect(userLogs).toBeInstanceOf(Array);
    });

    it('should provide resource audit logs', async () => {
      const resourceLogs = await cnd.getResourceAuditLogs('test-resource');
      expect(resourceLogs).toBeInstanceOf(Array);
    });

    it('should provide audit statistics', async () => {
      const stats = await cnd.getAuditStats();
      // May be undefined without connection
      if (stats) {
        expect(stats).toHaveProperty('totalEvents');
        expect(stats).toHaveProperty('uniqueUsers');
      }
    });
  });

  describe('Configuration Validation', () => {
    it('should validate enterprise configuration structure', () => {
      expect(testConfig.enterprise?.enabled).toBe(true);
      expect(testConfig.auth?.enabled).toBe(true);
      expect(testConfig.serviceDiscovery?.enabled).toBe(true);
      expect(testConfig.security?.audit?.enabled).toBe(true);
      expect(testConfig.performance?.monitoring?.enabled).toBe(true);
    });

    it('should handle RBAC configuration', () => {
      expect(testConfig.auth?.rbac?.enabled).toBe(true);
      expect(testConfig.auth?.rbac?.roles).toHaveProperty('admin');
      expect(testConfig.auth?.rbac?.roles).toHaveProperty('user');
      expect(testConfig.auth?.rbac?.permissions).toHaveProperty('read');
      expect(testConfig.auth?.rbac?.permissions).toHaveProperty('write');
    });
  });
});

// Integration test with mocked services
describe('CND Service Integration', () => {
  it('should integrate with Gateway service pattern', async () => {
    const gatewayConfig: CNDConfig = {
      cbd: {
        host: 'localhost',
        port: 5000,
        database: 'gateway_db'
      },
      enterprise: {
        enabled: true,
        features: {
          serviceDiscovery: true,
          authentication: true,
          monitoring: true,
          audit: true,
          authorization: false,
          encryption: false,
          backup: false,
          clustering: false
        }
      },
      serviceDiscovery: {
        enabled: true,
        serviceName: 'gateway-cnd',
        tags: ['gateway', 'api', 'routing']
      },
      auth: {
        enabled: true,
        provider: 'jwt',
        config: {
          secret: 'gateway-secret'
        }
      },
      performance: {
        monitoring: {
          enabled: true,
          metricsPort: 9090
        }
      }
    };

    const gatewayCND = new CND(gatewayConfig);
    expect(gatewayCND.isEnterpriseEnabled()).toBe(true);

    const features = gatewayCND.getEnabledFeatures();
    expect(features).toContain('serviceDiscovery');
    expect(features).toContain('authentication');
    expect(features).toContain('monitoring');
  });

  it('should integrate with AI service pattern', async () => {
    const aiConfig: CNDConfig = {
      cbd: {
        host: 'localhost',
        port: 5000,
        database: 'ai_db'
      },
      enterprise: {
        enabled: true,
        features: {
          serviceDiscovery: true,
          authentication: true,
          monitoring: true,
          audit: true,
          encryption: true,
          authorization: false,
          backup: false,
          clustering: false
        }
      },
      serviceDiscovery: {
        enabled: true,
        serviceName: 'ai-cnd',
        tags: ['ai', 'intelligence', 'ml']
      },
      security: {
        encryption: {
          enabled: true,
          algorithm: 'aes-256-gcm'
        },
        audit: {
          enabled: true,
          storage: 'database',
          retention: 90
        },
        rateLimit: {
          enabled: false,
          windowMs: 60000,
          maxRequests: 100
        }
      }
    };

    const aiCND = new CND(aiConfig);
    expect(aiCND.isEnterpriseEnabled()).toBe(true);

    const features = aiCND.getEnabledFeatures();
    expect(features).toContain('encryption');
    expect(features).toContain('audit');
  });
});

// Performance test
describe('CND Performance', () => {
  it('should handle rapid initialization', () => {
    const start = Date.now();

    for (let i = 0; i < 100; i++) {
      const testCND = new CND(testConfig);
      expect(testCND.isEnterpriseEnabled()).toBe(true);
    }

    const duration = Date.now() - start;
    expect(duration).toBeLessThan(1000); // Should initialize 100 instances in under 1 second
  });

  it('should provide consistent feature detection', () => {
    const instances = Array.from({ length: 10 }, () => new CND(testConfig));

    instances.forEach(instance => {
      const features = instance.getEnabledFeatures();
      expect(features).toContain('serviceDiscovery');
      expect(features).toContain('authentication');
      expect(features).toContain('monitoring');
    });
  });
});