apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ include "oramap.fullname" . }}-nginx-config
  labels:
    app: {{ include "oramap.name" . }}-frontend
    chart: {{ include "oramap.chart" . }}
    release: {{ .Release.Name }}
    heritage: {{ .Release.Service }}
data:
  default.conf: |
    server {
        listen 80;
        server_name _;
        root /usr/share/nginx/html;
        index index.html;

        # Gzip compression
        gzip on;
        gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

        # Main location
        location / {
            try_files $uri $uri/ /index.html;
        }

        # API proxy to backend service in Kubernetes
        location /api/ {
            proxy_pass http://{{ include "oramap.fullname" . }}-backend:{{ .Values.service.backend.port }};
            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;
            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;
        }

        # Cache static assets
        location ~* \.(jpg|jpeg|png|gif|ico|css|js|svg)$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
        }
    }