user nginx;
worker_processes auto;
worker_cpu_affinity auto;
pid /run/nginx.pid;

events {
    worker_connections 4086;
    use epoll;
    multi_accept on;
}

http {
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    keepalive_requests 1000;
    types_hash_max_size 2048;

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

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

    gzip              on;
    gzip_vary         on;
    gzip_proxied      any;
    gzip_comp_level   6;
    gzip_buffers      16 8k;
    gzip_http_version 1.1;
    gzip_min_length   256;
    gzip_types        text/plain text/css text/xml text/javascript application/x-javascript application/xml
                      application/javascript application/json application/x-protobuf;

    proxy_cache_path    /var/cache/nginx/
                        levels=1:2
                        max_size=10g
                        inactive=60m
                        use_temp_path=off
                        keys_zone=backend_cache:10m;

    upstream tiles_upstream {
        server tiles:3000;
    }

    server {
        
        listen              80;

        server_name localhost martin.maplibre.org maplibre.org cloudflare.com;
        resolver 127.0.0.1;
        
        location / {
            root      /usr/share/nginx/html;
            try_files $uri /index.html;
        }

        location ~ /tiles/(?<fwd_path>.*) {
            proxy_set_header        Host $host;
            proxy_set_header        X-Forwarded-Proto "http";
            proxy_set_header        X-Real-IP $remote_addr;
            proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header        X-Forwarded-Host $host;
            proxy_set_header        X-Rewrite-URL $uri;
            proxy_redirect          off;

            proxy_connect_timeout   5m;
            proxy_send_timeout      5m;
            proxy_read_timeout      5m;
            send_timeout            5m;

            proxy_cache             backend_cache;
            proxy_cache_lock        on;
            proxy_cache_revalidate  on;
            proxy_cache_valid       200 204 302 1d;
            proxy_cache_valid       404 1m;
            proxy_cache_use_stale   error timeout http_500 http_502 http_503 http_504;
            add_header              X-Cache-Status $upstream_cache_status;

            proxy_pass              http://tiles_upstream/$fwd_path$is_args$args;
        }

        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
          root /usr/share/nginx/html;
        }
    }
}