# ============================================
# Document Translation API - Kubernetes Deployment
# ============================================
# Apply with: kubectl apply -f k8s/

apiVersion: v1
kind: Namespace
metadata:
  name: translate-api
  labels:
    app: translate-api

---
# ConfigMap for application settings
apiVersion: v1
kind: ConfigMap
metadata:
  name: translate-config
  namespace: translate-api
data:
  TRANSLATION_SERVICE: "ollama"
  OLLAMA_BASE_URL: "http://ollama-service:11434"
  OLLAMA_MODEL: "llama3"
  MAX_FILE_SIZE_MB: "50"
  RATE_LIMIT_REQUESTS_PER_MINUTE: "60"
  RATE_LIMIT_TRANSLATIONS_PER_MINUTE: "10"
  LOG_LEVEL: "INFO"

---
# Secret for sensitive data
apiVersion: v1
kind: Secret
metadata:
  name: translate-secrets
  namespace: translate-api
type: Opaque
stringData:
  ADMIN_USERNAME: "admin"
  ADMIN_PASSWORD: "changeme123"  # Change in production!
  DEEPL_API_KEY: ""
  OPENAI_API_KEY: ""

---
# Backend Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: backend
  namespace: translate-api
  labels:
    app: backend
spec:
  replicas: 2
  selector:
    matchLabels:
      app: backend
  template:
    metadata:
      labels:
        app: backend
    spec:
      containers:
        - name: backend
          image: translate-api-backend:latest
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 8000
          envFrom:
            - configMapRef:
                name: translate-config
            - secretRef:
                name: translate-secrets
          resources:
            requests:
              memory: "512Mi"
              cpu: "250m"
            limits:
              memory: "2Gi"
              cpu: "1000m"
          readinessProbe:
            httpGet:
              path: /health
              port: 8000
            initialDelaySeconds: 10
            periodSeconds: 10
          livenessProbe:
            httpGet:
              path: /health
              port: 8000
            initialDelaySeconds: 30
            periodSeconds: 30
          volumeMounts:
            - name: uploads
              mountPath: /app/uploads
            - name: outputs
              mountPath: /app/outputs
      volumes:
        - name: uploads
          persistentVolumeClaim:
            claimName: uploads-pvc
        - name: outputs
          persistentVolumeClaim:
            claimName: outputs-pvc

---
# Backend Service
apiVersion: v1
kind: Service
metadata:
  name: backend-service
  namespace: translate-api
spec:
  selector:
    app: backend
  ports:
    - port: 8000
      targetPort: 8000
  type: ClusterIP

---
# Frontend Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: frontend
  namespace: translate-api
  labels:
    app: frontend
spec:
  replicas: 2
  selector:
    matchLabels:
      app: frontend
  template:
    metadata:
      labels:
        app: frontend
    spec:
      containers:
        - name: frontend
          image: translate-api-frontend:latest
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 3000
          env:
            - name: NEXT_PUBLIC_API_URL
              value: "http://backend-service:8000"
          resources:
            requests:
              memory: "128Mi"
              cpu: "100m"
            limits:
              memory: "512Mi"
              cpu: "500m"
          readinessProbe:
            httpGet:
              path: /
              port: 3000
            initialDelaySeconds: 10
            periodSeconds: 10

---
# Frontend Service
apiVersion: v1
kind: Service
metadata:
  name: frontend-service
  namespace: translate-api
spec:
  selector:
    app: frontend
  ports:
    - port: 3000
      targetPort: 3000
  type: ClusterIP

---
# Ingress for external access
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: translate-ingress
  namespace: translate-api
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/proxy-body-size: "100m"
    nginx.ingress.kubernetes.io/proxy-read-timeout: "600"
    nginx.ingress.kubernetes.io/proxy-send-timeout: "600"
    cert-manager.io/cluster-issuer: "letsencrypt-prod"
spec:
  tls:
    - hosts:
        - translate.yourdomain.com
      secretName: translate-tls
  rules:
    - host: translate.yourdomain.com
      http:
        paths:
          - path: /api
            pathType: Prefix
            backend:
              service:
                name: backend-service
                port:
                  number: 8000
          - path: /translate
            pathType: Prefix
            backend:
              service:
                name: backend-service
                port:
                  number: 8000
          - path: /health
            pathType: Prefix
            backend:
              service:
                name: backend-service
                port:
                  number: 8000
          - path: /admin
            pathType: Prefix
            backend:
              service:
                name: backend-service
                port:
                  number: 8000
          - path: /
            pathType: Prefix
            backend:
              service:
                name: frontend-service
                port:
                  number: 3000

---
# Persistent Volume Claims
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: uploads-pvc
  namespace: translate-api
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Gi

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: outputs-pvc
  namespace: translate-api
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 20Gi

---
# Horizontal Pod Autoscaler for Backend
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: backend-hpa
  namespace: translate-api
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: backend
  minReplicas: 2
  maxReplicas: 10
  metrics:
    - type: Resource
      resource:
        name: cpu
        target:
          type: Utilization
          averageUtilization: 70
    - type: Resource
      resource:
        name: memory
        target:
          type: Utilization
          averageUtilization: 80