cloud-host/backend/src/kubernetes/kubernetes.service.spec.ts

import { AppRuntime, DatabaseType } from '../common/enums';

/**
 * Tests for KubernetesService.buildHelmValues (private method).
 * We extract and test the logic directly since it's critical for Helm deployments.
 */
describe('buildHelmValues logic', () => {
  const domain = 'apps.cloudhost.local';

  function buildHelmValues(app: any, imageUri: string): Record<string, any> {
    const isWordPress = app.runtime === AppRuntime.WORDPRESS;
    const hasDb = app.databaseType !== DatabaseType.NONE;
    const isPostgres = app.databaseType === DatabaseType.POSTGRESQL;

    return {
      app: {
        name: app.name,
        namespace: `user-${app.userId.split('-')[0]}`,
        runtime: app.runtime,
        image: imageUri,
        port: app.port,
        replicas: app.replicas,
      },
      resources: {
        cpuRequest: app.cpuRequest,
        cpuLimit: app.cpuLimit,
        memoryRequest: app.memoryRequest,
        memoryLimit: app.memoryLimit,
      },
      envVars: app.envVars || {},
      ingress: {
        enabled: true,
        subdomain: app.subdomain || app.name,
        domain: domain,
        clusterIssuer: 'letsencrypt-prod',
      },
      database: {
        enabled: hasDb,
        type: app.databaseType,
        version: app.dbVersion || (isPostgres ? '16' : '8.0'),
        username: app.dbUsername || 'appuser',
        password: app.dbPassword || 'generated-password',
        storageSize: app.dbStorageSize || '1Gi',
        resources: {
          cpuRequest: '100m',
          cpuLimit: '500m',
          memoryRequest: '256Mi',
          memoryLimit: '512Mi',
        },
      },
      wordpress: {
        enabled: isWordPress,
        wpContentStorageSize: '2Gi',
      },
      changeCause: `Deploy ${imageUri} at 2024-01-01T00:00:00.000Z`,
    };
  }

  const baseApp = {
    name: 'my-app',
    userId: 'abc123-def456',
    runtime: AppRuntime.NODEJS,
    port: 3000,
    replicas: 1,
    cpuRequest: '100m',
    cpuLimit: '500m',
    memoryRequest: '128Mi',
    memoryLimit: '512Mi',
    databaseType: DatabaseType.NONE,
    envVars: {},
    subdomain: 'my-app-abc123',
  };

  it('should set correct namespace from userId', () => {
    const values = buildHelmValues(baseApp, 'registry/my-app:123');
    expect(values.app.namespace).toBe('user-abc123');
  });

  it('should disable database when type is NONE', () => {
    const values = buildHelmValues(baseApp, 'registry/my-app:123');
    expect(values.database.enabled).toBe(false);
  });

  it('should enable database for PostgreSQL', () => {
    const app = { ...baseApp, databaseType: DatabaseType.POSTGRESQL, dbUsername: 'pguser', dbPassword: 'secret' };
    const values = buildHelmValues(app, 'registry/my-app:123');
    expect(values.database.enabled).toBe(true);
    expect(values.database.type).toBe('postgresql');
    expect(values.database.version).toBe('16');
    expect(values.database.username).toBe('pguser');
  });

  it('should enable database for MySQL with correct default version', () => {
    const app = { ...baseApp, databaseType: DatabaseType.MYSQL };
    const values = buildHelmValues(app, 'registry/my-app:123');
    expect(values.database.enabled).toBe(true);
    expect(values.database.version).toBe('8.0');
  });

  it('should enable wordpress flags for wordpress runtime', () => {
    const app = { ...baseApp, runtime: AppRuntime.WORDPRESS, databaseType: DatabaseType.MYSQL };
    const values = buildHelmValues(app, 'registry/wp:1');
    expect(values.wordpress.enabled).toBe(true);
    expect(values.database.enabled).toBe(true);
  });

  it('should not enable wordpress for nodejs runtime', () => {
    const values = buildHelmValues(baseApp, 'registry/my-app:123');
    expect(values.wordpress.enabled).toBe(false);
  });

  it('should use subdomain from app if provided', () => {
    const values = buildHelmValues(baseApp, 'registry/my-app:123');
    expect(values.ingress.subdomain).toBe('my-app-abc123');
  });

  it('should fallback subdomain to app name', () => {
    const app = { ...baseApp, subdomain: undefined };
    const values = buildHelmValues(app, 'registry/my-app:123');
    expect(values.ingress.subdomain).toBe('my-app');
  });

  it('should use custom dbVersion when provided', () => {
    const app = { ...baseApp, databaseType: DatabaseType.POSTGRESQL, dbVersion: '15' };
    const values = buildHelmValues(app, 'registry/my-app:123');
    expect(values.database.version).toBe('15');
  });

  it('should default dbStorageSize to 1Gi', () => {
    const app = { ...baseApp, databaseType: DatabaseType.POSTGRESQL };
    const values = buildHelmValues(app, 'registry/my-app:123');
    expect(values.database.storageSize).toBe('1Gi');
  });

  it('should use custom dbStorageSize when provided', () => {
    const app = { ...baseApp, databaseType: DatabaseType.POSTGRESQL, dbStorageSize: '5Gi' };
    const values = buildHelmValues(app, 'registry/my-app:123');
    expect(values.database.storageSize).toBe('5Gi');
  });

  it('should pass envVars as empty object when not set', () => {
    const app = { ...baseApp, envVars: undefined };
    const values = buildHelmValues(app, 'registry/my-app:123');
    expect(values.envVars).toEqual({});
  });

  it('should pass envVars when set', () => {
    const app = { ...baseApp, envVars: { NODE_ENV: 'production', API_KEY: '12345' } };
    const values = buildHelmValues(app, 'registry/my-app:123');
    expect(values.envVars).toEqual({ NODE_ENV: 'production', API_KEY: '12345' });
  });

  it('should set image correctly in app values', () => {
    const values = buildHelmValues(baseApp, 'registry.local:5000/abc123/my-app:1700000000');
    expect(values.app.image).toBe('registry.local:5000/abc123/my-app:1700000000');
  });
});

describe('generatePassword', () => {
  function generatePassword(length = 24): string {
    const chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    let password = '';
    for (let i = 0; i < length; i++) {
      password += chars.charAt(Math.floor(Math.random() * chars.length));
    }
    return password;
  }

  it('should generate password of specified length', () => {
    expect(generatePassword(16)).toHaveLength(16);
    expect(generatePassword(32)).toHaveLength(32);
    expect(generatePassword()).toHaveLength(24);
  });

  it('should only contain alphanumeric characters (no shell-unsafe chars)', () => {
    for (let i = 0; i < 100; i++) {
      const pw = generatePassword();
      expect(pw).toMatch(/^[a-zA-Z0-9]+$/);
    }
  });

  it('should generate unique passwords', () => {
    const passwords = new Set<string>();
    for (let i = 0; i < 50; i++) {
      passwords.add(generatePassword());
    }
    // With 62^24 possibilities, all 50 should be unique
    expect(passwords.size).toBe(50);
  });
});