worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
}

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

    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent"';

    access_log /var/log/nginx/access.log main;

    sendfile on;
    tcp_nopush on;
    keepalive_timeout 65;
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;

    # Upstream servers
    upstream api {
        server 127.0.0.1:3000;
    }

    server {
        listen 80;
        server_name _;

        # API routes
        location /api/ {
            proxy_pass http://api;
            proxy_http_version 1.1;
            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;
        }

        # Health check (direct to API)
        location /health {
            proxy_pass http://api/health;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
        }

        # Static assets
        location /assets/ {
            alias /app/ui/assets/;
            expires 1y;
            add_header Cache-Control "public, immutable";
        }

        # React SPA at root (catch-all)
        location / {
            alias /app/ui/;
            index index.html;
            try_files $uri $uri/ /index.html;
        }
    }
}