worker_processes auto;

events {
    worker_connections 1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile      on;
    keepalive_timeout 65;

    gzip on;
    gzip_types text/css application/javascript application/json image/svg+xml;

    # Simple in-memory cache for upstream JSON responses so many globe
    # clients don't hammer the backend/SQLite on every poll.
    proxy_cache_path /tmp/newsatlas_cache levels=1:2 keys_zone=api_cache:10m max_size=100m inactive=5m;

    upstream backend {
        server backend:8000;
    }

    server {
        listen 80;
        server_name _;

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

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

        location /api/ {
            proxy_pass http://backend/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_cache api_cache;
            proxy_cache_valid 200 30s;
            proxy_cache_use_stale error timeout updating;
            add_header X-Cache-Status $upstream_cache_status;
        }

        location /healthz {
            access_log off;
            return 200 "ok\n";
        }
    }
}