---
# Namespace for serverless components
apiVersion: v1
kind: Namespace
metadata:
  name: devcontainers
  labels:
    app.kubernetes.io/name: devcontainer
    app.kubernetes.io/component: serverless

---
# Secret for GitHub tokens, VNC passwords, etc.
apiVersion: v1
kind: Secret
metadata:
  name: devcontainer-serverless-secrets
  namespace: devcontainers
type: Opaque
stringData:
  # Update these values as needed
  GITHUB_TOKEN: ""
  VNC_PASSWORD: "changeme"
  ANTHROPIC_API_KEY: ""
  GIT_USER_NAME: "DevContainer User"
  GIT_USER_EMAIL: "devcontainer@example.com"

---
# Routing proxy deployment (handles GitHub repo extraction)
apiVersion: apps/v1
kind: Deployment
metadata:
  name: devcontainer-routing-proxy
  namespace: devcontainers
  labels:
    app.kubernetes.io/name: devcontainer
    app.kubernetes.io/component: routing-proxy
spec:
  replicas: 2  # High availability
  selector:
    matchLabels:
      app.kubernetes.io/name: devcontainer
      app.kubernetes.io/component: routing-proxy
  template:
    metadata:
      labels:
        app.kubernetes.io/name: devcontainer
        app.kubernetes.io/component: routing-proxy
    spec:
      containers:
      - name: routing-proxy
        image: ghcr.io/cpfarhood/devcontainer-routing-proxy:latest
        ports:
        - containerPort: 8080
          name: http
        env:
        - name: DEVCONTAINER_SERVICE_URL
          value: "devcontainer-serverless.devcontainers.svc.cluster.local"
        resources:
          requests:
            memory: "64Mi"
            cpu: "100m"
          limits:
            memory: "256Mi"
            cpu: "500m"
        livenessProbe:
          httpGet:
            path: /health
            port: 8080
          initialDelaySeconds: 5
          periodSeconds: 10
        readinessProbe:
          httpGet:
            path: /health
            port: 8080
          initialDelaySeconds: 2
          periodSeconds: 5

---
# Service for routing proxy
apiVersion: v1
kind: Service
metadata:
  name: devcontainer-routing-proxy
  namespace: devcontainers
  labels:
    app.kubernetes.io/name: devcontainer
    app.kubernetes.io/component: routing-proxy
spec:
  type: ClusterIP
  ports:
  - port: 80
    targetPort: 8080
    name: http
  selector:
    app.kubernetes.io/name: devcontainer
    app.kubernetes.io/component: routing-proxy

---
# Knative Service (auto-scaling devcontainer instances)
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
  name: devcontainer-serverless
  namespace: devcontainers
  annotations:
    # Scale to zero when not in use (saves resources)
    autoscaling.knative.dev/minScale: "0"
    autoscaling.knative.dev/maxScale: "10"
    # Keep instances warm for 5 minutes after last request
    autoscaling.knative.dev/scale-to-zero-grace-period: "5m"
    # Target 1 concurrent request per pod (ensures isolation)
    autoscaling.knative.dev/target: "1"
    # Custom domain (optional - configure after Authentik setup)
    # serving.knative.dev/domain: "devcontainer.farh.net"
spec:
  template:
    metadata:
      annotations:
        # Container port for VNC web interface
        autoscaling.knative.dev/targetPort: "5800"
        # Timeout for cold starts (dev containers need time to initialize)
        serving.knative.dev/timeoutSeconds: "600"  # 10 minutes for repo cloning
        # Resource allocation per instance
        autoscaling.knative.dev/class: "kpa.autoscaling.knative.dev"
        autoscaling.knative.dev/metric: "concurrency"
    spec:
      # Give containers more time to start (repo cloning + IDE launch)
      timeoutSeconds: 600  # 10 minutes
      containers:
      - name: devcontainer
        image: ghcr.io/cpfarhood/devcontainer:latest
        ports:
        - containerPort: 5800
          name: vnc-web
        env:
        # Flag to indicate serverless mode
        - name: SERVERLESS_MODE
          value: "true"
        - name: DYNAMIC_GITHUB_ROUTING
          value: "true"
        - name: IDE
          value: "vscode"
        - name: DISPLAY_WIDTH
          value: "1920"
        - name: DISPLAY_HEIGHT
          value: "1080"
        - name: SECURE_CONNECTION
          value: "0"
        - name: USER_ID
          value: "1000"
        - name: GROUP_ID
          value: "1000"
        # Enable file manager for easy upload/download
        - name: WEB_FILE_MANAGER
          value: "1"
        - name: WEB_FILE_MANAGER_ALLOWED_PATHS
          value: "/workspace,/config"
        # Happy Coder config (ephemeral in serverless mode)
        - name: HAPPY_HOME_DIR
          value: "/tmp/.happy"
        - name: HAPPY_EXPERIMENTAL
          value: "true"
        # Use secrets for sensitive data
        envFrom:
        - secretRef:
            name: devcontainer-serverless-secrets
            optional: false
        resources:
          requests:
            memory: "1Gi"
            cpu: "500m"
          limits:
            memory: "4Gi"
            cpu: "2000m"
        volumeMounts:
        - name: tmp-home
          mountPath: /config
        - name: shm
          mountPath: /dev/shm
        # Readiness probe - VNC must be ready
        readinessProbe:
          httpGet:
            path: /
            port: 5800
          initialDelaySeconds: 60
          periodSeconds: 10
          timeoutSeconds: 5
          failureThreshold: 10
        # Liveness probe - ensure container stays healthy
        livenessProbe:
          httpGet:
            path: /
            port: 5800
          initialDelaySeconds: 120
          periodSeconds: 30
          timeoutSeconds: 10
          failureThreshold: 3
      volumes:
      - name: tmp-home
        emptyDir: {}  # Ephemeral - each instance gets fresh home
      - name: shm
        emptyDir:
          medium: Memory
          sizeLimit: 2Gi

---
# Ingress for the routing proxy (will be secured by Authentik)
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: devcontainer-serverless-ingress
  namespace: devcontainers
  annotations:
    # Authentik forward auth annotations
    nginx.ingress.kubernetes.io/auth-url: http://authentik.authentik.svc.cluster.local/outpost.goauthentik.io/auth/nginx
    nginx.ingress.kubernetes.io/auth-signin: https://auth.farh.net/outpost.goauthentik.io/start?rd=$escaped_request_uri
    nginx.ingress.kubernetes.io/auth-response-headers: X-Authentik-Username,X-Authentik-Groups,X-Authentik-Email,X-Authentik-Name
    nginx.ingress.kubernetes.io/auth-snippet: |
      proxy_set_header X-Forwarded-Host $http_host;

    # SSL and general settings
    cert-manager.io/cluster-issuer: "letsencrypt-prod"
    nginx.ingress.kubernetes.io/ssl-redirect: "true"
    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"

    # WebSocket support for VNC
    nginx.ingress.kubernetes.io/proxy-read-timeout: "3600"
    nginx.ingress.kubernetes.io/proxy-send-timeout: "3600"

    # Large file upload support (for file manager)
    nginx.ingress.kubernetes.io/client-max-body-size: "100m"
    nginx.ingress.kubernetes.io/proxy-body-size: "100m"
spec:
  tls:
  - hosts:
    - devcontainer.farh.net
    secretName: devcontainer-serverless-tls
  rules:
  - host: devcontainer.farh.net
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: devcontainer-routing-proxy
            port:
              number: 80