{ config, lib, pkgs, ... }:
let

  errorPages = pkgs.fetchgit {
    url = "https://git.ingolf-wagner.de/palo/http-errors.git";
    rev = "a6bfef1fa69e2cb836a51af265f5d4f2a615d77a";
    sha256 = "0lypdggya80gwmz18bdpspisw5wyy4invpri42zaq5xb3808hqyl";
  };

  error = {
    extraConfig = ''
      error_page 400 /errors/400.html;
      error_page 401 /errors/401.html;
      error_page 402 /errors/402.html;
      error_page 403 /errors/403.html;
      error_page 404 /errors/404.html;
      error_page 405 /errors/405.html;
      error_page 406 /errors/406.html;
      error_page 500 /errors/500.html;
      error_page 501 /errors/501.html;
      error_page 502 /errors/502.html;
      error_page 503 /errors/503.html;
      error_page 504 /errors/504.html;
    '';
    locations."^~ /errors/" = {
      extraConfig = "internal;";
      root = "${errorPages}/";
    };
  };
in {

  networking.firewall.allowedTCPPorts = [ 80 443 4443 ];
  networking.firewall.allowedUDPPorts = [ 80 443 4443 ];

  services.nginx = {
    enable = true;
    recommendedProxySettings = true;
    virtualHosts = {

      "git.ingolf-wagner.de" = {
        listen = [
          {
            addr = "0.0.0.0";
            port = 4443;
            ssl = true;
          }
          {
            addr = "0.0.0.0";
            port = 80;
            ssl = false;
          }
        ];
        forceSSL = true;
        enableACME = true;
        extraConfig = error.extraConfig;

        locations = {
          "/" = { proxyPass = "http://workhorse.private:3000"; };
        } // error.locations;
      };

      "paste.ingolf-wagner.de" = {
        listen = [
          {
            addr = "0.0.0.0";
            port = 4443;
            ssl = true;
          }
          {
            addr = "0.0.0.0";
            port = 80;
            ssl = false;
          }
        ];
        forceSSL = true;
        enableACME = true;
        extraConfig = error.extraConfig;
        locations = {
          "/" = { proxyPass = "http://workhorse.private:8000"; };
        } // error.locations;
      };

      "travel.ingolf-wagner.de" = {
        listen = [
          {
            addr = "0.0.0.0";
            port = 4443;
            ssl = true;
          }
          {
            addr = "0.0.0.0";
            port = 80;
            ssl = false;
          }
        ];
        forceSSL = true;
        enableACME = true;
        extraConfig = error.extraConfig;
        locations = {
          "/" = {
            root = "/srv/www/travel";
            extraConfig = ''
              if (-d $request_filename) {
                rewrite [^/]$ $scheme://$http_host$request_uri/ permanent;
              }
            '';
          };
        } // error.locations;
      };

      "tech.ingolf-wagner.de" = {
        listen = [
          {
            addr = "0.0.0.0";
            port = 4443;
            ssl = true;
          }
          {
            addr = "0.0.0.0";
            port = 80;
            ssl = false;
          }
        ];
        forceSSL = true;
        enableACME = true;
        extraConfig = error.extraConfig;
        locations = {
          "/" = {
            root = "/srv/www/tech";
            extraConfig = ''
              if (-d $request_filename) {
                rewrite [^/]$ $scheme://$http_host$request_uri/ permanent;
              }
            '';
          };
        } // error.locations;
      };

      "terranix.org" = {
        listen = [
          {
            addr = "0.0.0.0";
            port = 4443;
            ssl = true;
          }
          {
            addr = "0.0.0.0";
            port = 80;
            ssl = false;
          }
        ];
        forceSSL = true;
        enableACME = true;
        extraConfig = error.extraConfig;
        locations = {
          "/" = {
            root = "/srv/www/terranix";
            extraConfig = ''
              if (-d $request_filename) {
                rewrite [^/]$ $scheme://$http_host$request_uri/ permanent;
              }
            '';
          };
        } // error.locations;
      };

      "chat.ingolf-wagner.de" = {
        listen = [
          {
            addr = "0.0.0.0";
            port = 4443;
            ssl = true;
          }
          {
            addr = "0.0.0.0";
            port = 80;
            ssl = false;
          }
        ];
        forceSSL = true;
        enableACME = true;
        extraConfig = error.extraConfig;
        locations = {
          "/" = {
            proxyPass = "http://chat.workhorse.private";
            proxyWebsockets = true;
            extraConfig = ''
              sub_filter "http://chat.ingolf-wagner.de" "https://chat.ingolf-wagner.de";
              sub_filter "chat.workhorse.private" "chat.ingolf-wagner.de";
            '';
          };
        } // error.locations;
      };

      "nextcloud.ingolf-wagner.de" = {
        listen = [
          {
            addr = "0.0.0.0";
            port = 4443;
            ssl = true;
          }
          {
            addr = "0.0.0.0";
            port = 80;
            ssl = false;
          }
        ];
        forceSSL = true;
        enableACME = true;
        extraConfig = error.extraConfig;
        locations = {
          "/" = {
            proxyPass = "http://nextcloud.workhorse.private";
            extraConfig = ''
              sub_filter "http://nextcloud.ingolf-wagner.de" "https://nextcloud.ingolf-wagner.de";
              sub_filter "nextcloud.workhorse.private" "nextcloud.ingolf-wagner.de";
              # used for view/edit office file via Office Online Server
              client_max_body_size 0;
            '';
          };
          "= /.well-known/carddav" = {
            priority = 210;
            extraConfig = "return 301 $scheme://$host/remote.php/dav;";
          };
          "= /.well-known/caldav" = {
            priority = 210;
            extraConfig = "return 301 $scheme://$host/remote.php/dav;";
          };

        } // error.locations;
      };

      "gaykraft.com" = {
        listen = [
          {
            addr = "0.0.0.0";
            port = 4443;
            ssl = true;
          }
          {
            addr = "0.0.0.0";
            port = 80;
            ssl = false;
          }
        ];
        forceSSL = true;
        enableACME = true;
        extraConfig = error.extraConfig;
        locations = {
          "/" = { root = "/srv/www/gaykraft"; };
        } // error.locations;
      };

    };
  };

  services.sslh = {
    enable = true;
    listenAddress = "0.0.0.0";
    port = 443;
    verbose = false;
    transparent = true;
    appendConfig = # json
      ''
        protocols:
        (
          { name: "ssh"; service: "ssh"; host: "localhost"; port: "2222"; probe: "builtin"; },
          { name: "ssl"; host: "localhost"; port: "4443"; probe: "builtin"; },
          { name: "tinc"; host: "localhost"; port: "655"; probe: "builtin"; }
        );
      '';
  };

  systemd.services."socat-proxy" = {
    wantedBy = [ "sslh.service" "multi-user.target" ];
    after = [ "sslh.service" ];
    script = ''
      ${pkgs.socat}/bin/socat TCP-LISTEN:2222,fork TCP:workhorse.private:2222
    '';
    #serviceConfig.User = "sslh";
  };

}