openapi: 3.0.0
info:
  title: Authentication API
  version: 1.0.0
  description: Authentication and authorization service

servers:
  - url: https://api.example.com/v1
    description: Production
  - url: https://staging-api.example.com/v1
    description: Staging

components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

    apiKey:
      type: apiKey
      in: header
      name: X-API-Key

  schemas:
    User:
      type: object
      properties:
        id:
          type: string
          format: uuid
        email:
          type: string
          format: email
        roles:
          type: array
          items:
            $ref: '#/components/schemas/Role'

    Error:
      type: object
      required: [code, message]
      properties:
        code:
          type: string
        message:
          type: string
        details:
          type: object

paths:
  /auth/login:
    post:
      summary: User login
      operationId: login
      tags: [Authentication]
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required: [email, password]
              properties:
                email:
                  type: string
                password:
                  type: string
      responses:
        200:
          description: Successful login
          content:
            application/json:
              schema:
                type: object
                properties:
                  token:
                    type: string
                  refreshToken:
                    type: string
                  user:
                    $ref: '#/components/schemas/User'

# Kubernetes Deployment Architecture
apiVersion: apps/v1
kind: Deployment
metadata:
  name: auth-service
  labels:
    app: auth-service
spec:
  replicas: 3
  selector:
    matchLabels:
      app: auth-service
  template:
    metadata:
      labels:
        app: auth-service
    spec:
      containers:
      - name: auth-service
        image: auth-service:latest
        ports:
        - containerPort: 3000
        env:
        - name: NODE_ENV
          value: "production"
        - name: DATABASE_URL
          valueFrom:
            secretKeyRef:
              name: db-secret
              key: url
        resources:
          requests:
            memory: "256Mi"
            cpu: "250m"
          limits:
            memory: "512Mi"
            cpu: "500m"
        livenessProbe:
          httpGet:
            path: /health
            port: 3000
          initialDelaySeconds: 30
          periodSeconds: 10
        readinessProbe:
          httpGet:
            path: /ready
            port: 3000
          initialDelaySeconds: 5
          periodSeconds: 5
---
apiVersion: v1
kind: Service
metadata:
  name: auth-service
spec:
  selector:
    app: auth-service
  ports:
  - protocol: TCP
    port: 80
    targetPort: 3000
  type: ClusterIP