#!/usr/bin/env bash
set -euo pipefail

# Create a corrected nginx.conf
cat > /tmp/nginx.conf << 'EOF'
server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # Redirect API requests to the backend service
    location /api/ {
        # Important: use backend-service.sk1.svc.cluster.local for the full internal DNS name
        proxy_pass http://backend-service.sk1.svc.cluster.local:4000/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        
        # Add debugging headers
        add_header X-Debug-Target "backend-service.sk1.svc.cluster.local:4000" always;
    }

    # Serve static assets
    location / {
        try_files $uri $uri/ /index.html;
    }
}
EOF

# Create a ConfigMap from this nginx.conf
kubectl create configmap nginx-config -n sk1 --from-file=/tmp/nginx.conf --dry-run=client -o yaml | kubectl apply -f -

# Update the frontend deployment to use this ConfigMap
cat > /tmp/frontend-deployment-update.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  name: frontend
  namespace: sk1
spec:
  template:
    spec:
      containers:
      - name: frontend
        volumeMounts:
        - name: nginx-config
          mountPath: /etc/nginx/conf.d/default.conf
          subPath: nginx.conf
      volumes:
      - name: nginx-config
        configMap:
          name: nginx-config
EOF

# Apply the update as a patch
kubectl patch deployment frontend -n sk1 --patch-file /tmp/frontend-deployment-update.yaml