apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-router-config
  namespace: syncthing
data:
  default.conf: |
    server {
        listen 80;
        server_name _;

        # Route assets based on cookie or referer
        location / {
            # Check cookie first
            if ($cookie_syncthing_instance = "nas") {
                proxy_pass http://syncthing-nas:8384;
            }
            if ($cookie_syncthing_instance = "master") {
                proxy_pass http://syncthing-master:8384;
            }
            if ($cookie_syncthing_instance = "iris") {
                proxy_pass http://syncthing-khv:8384;
            }

            # Check referer as fallback
            if ($http_referer ~ "/nas") {
                proxy_pass http://syncthing-nas:8384;
            }
            if ($http_referer ~ "/master") {
                proxy_pass http://syncthing-master:8384;
            }
            if ($http_referer ~ "/iris") {
                proxy_pass http://syncthing-khv:8384;
            }

            # Default to nas if no match
            proxy_pass http://syncthing-nas:8384;
            
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
        }
    }
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: syncthing-router
  namespace: syncthing
spec:
  replicas: 1
  selector:
    matchLabels:
      app: syncthing-router
  template:
    metadata:
      labels:
        app: syncthing-router
    spec:
      containers:
      - name: nginx
        image: nginx:alpine
        ports:
        - containerPort: 80
        volumeMounts:
        - name: config
          mountPath: /etc/nginx/conf.d
      volumes:
      - name: config
        configMap:
          name: nginx-router-config
---
apiVersion: v1
kind: Service
metadata:
  name: syncthing-router
  namespace: syncthing
spec:
  selector:
    app: syncthing-router
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80