{ pkgs, config, lib, ... }:
with lib;
let
  json = pkgs.formats.json {};
  cfg = config.services.webhook;
  debug = config.my.debug;
in
{
  options.services.webhook = {
    enable = mkEnableOption "Set up webhooks";
    pkg = mkOption {
      type = types.package;
      default = pkgs.webhook;
      description = "`webhook` package to use";
    };
    hostname = mkOption {
      type = types.str;
      description = "The vhost on which webhook will listen";
    };
    endPoint = mkOption {
      type = types.str;
      default = "hooks";
      description = "The endpoint of the webhooks";
    };
    hooks = mkOption {
      type = json.type;
      description = "Configuration for this webhook, check <link xlink:href="https://github.com/adnanh/webhook/blob/master/docs/Hook-Definition.md"/> for supported values";
    };
    internalPort = mkOption {
      type = types.int;
      default = 9000;
      description = "The local port used to (proxy)pass requests from nginx to webhook";
    };
  };
  config = mkIf cfg.enable {
    services.nginx = {
      enable = true;
      virtualHosts."${cfg.hostname}" = {
        locations."${cfg.endPoint}".proxyPass = "http://127.0.0.1:${toString cfg.internalPort}/hooks";
        enableACME = if debug then false else true;
      };
    };
    systemd.services.webhook = {
      enable = true;
      unitConfig = {
        Description = "Small server for creating HTTP hooks";
        Documentation = "https://github.com/adnanh/webhook/";
      };
      script = "${cfg.pkg}/bin/webhook -nopanic -ip \"127.0.0.1\" -port \"${toString cfg.internalPort}\" -verbose -hooks ${json.generate "conf.json" cfg.hooks}";
      wantedBy = [ "mulit-user.target" ];
   };
  };
}