nixconfig/modules/server/nginx/default.nix

{ config, lib, pkgs, ... }:
let
  cfg = config.syscfg.server;
  containers = cfg.containers; 
  faviconOverride = {
    " ~* /favicon\.(ico|png|svg|jpg)$" = {
      extraConfig = ''
        add_header Content-Type image/svg+xml;
        return 200 '<svg xmlns="http://www.w3.org/2000/svg" id="Layer_1" data-name="Layer 1" viewBox="0 0 50 50"><defs><style>.cls-1{fill:#fd4b2d;}</style></defs><path class="cls-1" d="M30.83,5A23.23,23.23,0,0,0,10.41,67.13h10.8C26,63,32.94,61.8,38,67.13H49.39C44.93,61.09,38.24,55,30.83,55Z"/><path class="cls-1" d="M46.25,28.11c-14.89,31.15-41,4.6-25-11H10.41c-8.47,14.76,3.24,34.68,20.42,34.23,13.28,0,24.24-19.72,24.24-23.21,0-1.54-2.14-6.25-5.68-11H38A40.52,40.52,0,0,1,46.25,78.11Zm.4-.91Z"/></svg>';
      '';
      # proxyPass = "http://127.0.0.1:9000";
    };
  };
  # Function to convert your container config into an NGINX vhost
  mkVhost = container: {
    forceSSL = true;
    # quic = true;
    # http3 = true;
    useACMEHost = "${cfg.hostDomain}";
    locations = faviconOverride // {
      "/" = {
        proxyPass = "http://${container.ip}:${toString container.port}";
        proxyWebsockets = true; # Recommended for modern apps
      };
    };
  };
  
in {
  config = lib.mkIf ( config.syscfg.server.web) {
    security.acme = {
      acceptTerms = true;
      defaults.email = "admin@domain.org";

      certs."${cfg.hostDomain}" = {
        domain = "*.${cfg.hostDomain}";
        extraDomainNames = [ "${cfg.hostDomain}" ]; # Adds the root too
        dnsProvider = "infomaniak";
        credentialsFile = config.sops.secrets."INFOMANIAK_API_KEY".path; # File containing your API token (e.g. CLOUDFLARE_DNS_API_TOKEN=...)
        group = "nginx"; 
      };
    };

    services.nginx = {
      enable = true;
      recommendedProxySettings = true;
      recommendedTlsSettings = true;
      recommendedGzipSettings = true;

      # appendHttpConfig = ''
      #   add_header Alt-Svc 'h3=":443"; ma=86400';
      # '';
      commonHttpConfig = ''
        proxy_buffer_size 32k;
        proxy_buffers 8 16k;
        proxy_busy_buffers_size 48k;
        port_in_redirect off;
      '';

      virtualHosts = {
        "_" = {
          default = true;
          forceSSL = true;
          # quic = true;
          # http3 = true;
          useACMEHost = "${cfg.hostDomain}";
          
          locations = {
            "/" = {
              extraConfig = ''
              return 404;
              '';
            };
          };
        };
        "sec.${cfg.hostDomain}" = {
          forceSSL = true;
          # quic = true;
          # http3 = true;
          useACMEHost = "${cfg.hostDomain}";
          
          locations = {
            "/" = {
              recommendedProxySettings = true;
              proxyWebsockets = true;
              proxyPass= "http://${cfg.containers.authentik.subdomain}.${cfg.hostDomain}";

              extraConfig = ''
                auth_request     /outpost.goauthentik.io/auth/nginx;
                error_page       401 = @goauthentik_proxy_signin;
                auth_request_set $auth_cookie $upstream_http_set_cookie;
                add_header       Set-Cookie $auth_cookie;
                
                auth_request_set $authentik_username $upstream_http_x_authentik_username;
                auth_request_set $authentik_groups $upstream_http_x_authentik_groups;
                auth_request_set $authentik_entitlements $upstream_http_x_authentik_entitlements;
                auth_request_set $authentik_email $upstream_http_x_authentik_email;
                auth_request_set $authentik_name $upstream_http_x_authentik_name;
                auth_request_set $authentik_uid $upstream_http_x_authentik_uid;

                proxy_set_header X-authentik-username $authentik_username;
                proxy_set_header X-authentik-groups $authentik_groups;
                proxy_set_header X-authentik-entitlements $authentik_entitlements;
                proxy_set_header X-authentik-email $authentik_email;
                proxy_set_header X-authentik-name $authentik_name;
                proxy_set_header X-authentik-uid $authentik_uid;
              '';
            };

            "/outpost.goauthentik.io" = {
              proxyPass = "http://${config.syscfg.server.containers.authentik.ip}:${toString config.syscfg.server.containers.authentik.port}/outpost.goauthentik.io";
              extraConfig = ''
                proxy_set_header        X-Original-URL $scheme://$http_host$request_uri;
                add_header              Set-Cookie $auth_cookie;
                auth_request_set        $auth_cookie $upstream_http_set_cookie;
                proxy_pass_request_body off;
                proxy_set_header        Content-Length "";
              '';
            };
          };
          extraConfig = ''
            location @goauthentik_proxy_signin {
                internal;
                add_header Set-Cookie $auth_cookie;
                return 302 https://${cfg.containers.authentik.subdomain}.${cfg.hostDomain}/outpost.goauthentik.io/start?rd=$scheme://$http_host$request_uri;
            }
          '';
        };
      } //lib.mapAttrs' (name: v: 
        lib.nameValuePair "${v.subdomain}.${cfg.hostDomain}" (mkVhost v)
      ) containers;
    };
  };
}