events {}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    # Logging
    access_log  /var/log/nginx/access.log;
    error_log   /var/log/nginx/error.log;

    # Performance
    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;
    keepalive_timeout  65;
    types_hash_max_size 2048;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/json application/javascript;

    server {
        listen 80;
        server_name _;

        root /usr/share/nginx/html;
        index index.html;

        # Health check endpoint for k8s
        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }

        # Proxy API requests to backend
        location /api/ {
            proxy_pass http://team-planner-backend-service:4001;
            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;
        }

        # SPA fallback - all routes go to index.html
        location / {
            try_files $uri $uri/ /index.html;
        }

        # Static assets with caching
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
        }
    }
}
