# Heavily inspired by https://github.com/Stunkymonkey/nixos/blob/b061b1785b4d07f9032b8cf17e866ff9dbc947b0/modules/services/homer/config.nix
{
  config,
  lib,
  ...
}: {
  options.webapps = {
    dashboardCategories = lib.mkOption {
      type = lib.types.listOf (lib.types.submodule {
        options = {
          name = lib.mkOption {
            type = lib.types.str;
            description = ''
              Category name.
            '';
            example = "Applications";
          };
          tag = lib.mkOption {
            type = lib.types.str;
            description = ''
              Category tag.
            '';
            example = "app";
          };
        };
      });
      description = ''
        App categories to display on the dashboard.
      '';
      example = [
        {
          name = "Application";
          tag = "app";
        }
      ];
      default = [];
    };

    apps = lib.mkOption {
      type =
        lib.types.attrsOf
        (lib.types.submodule {
          options = {
            dashboard = {
              url = lib.mkOption {
                type = lib.types.nullOr lib.types.str;
                description = ''
                  Url to webapp
                '';
                example = "http://192.168.1.10:1234";
                default = null;
              };
              name = lib.mkOption {
                type = lib.types.nullOr lib.types.str;
                description = ''
                  Application name.
                '';
                example = "App";
                default = null;
              };
              description = lib.mkOption {
                type = lib.types.nullOr lib.types.str;
                description = ''
                  Application description.
                '';
                example = "An amazing app!";
                default = null;
              };
              category = lib.mkOption {
                type = lib.types.nullOr lib.types.str;
                description = ''
                  App category tag.
                '';
                example = "app";
                default = null;
              };
              icon = lib.mkOption {
                type = lib.types.nullOr lib.types.str;
                description = ''
                  Font Awesome application icon.
                '';
                example = "rss";
                default = null;
              };
              type = lib.mkOption {
                type = lib.types.nullOr lib.types.str;
                description = ''
                  application type.
                '';
                example = "Ping";
                default = "Ping";
              };
              method = lib.mkOption {
                type = lib.types.enum ["get" "head"];
                description = ''
                  method of request used
                '';
                example = "get";
                default = "head";
              };
            };
          };
        });
      description = ''
        Defines a web application.
      '';
      default = {};
    };
  };

  config = let
    cfg = config.webapps;
  in {
    lib.webapps.homerServices = let
      apps = builtins.filter (a: a.dashboard.name != null) (lib.attrValues cfg.apps);
    in
      lib.forEach cfg.dashboardCategories (
        cat: let
          catApps = lib.sort (a: b: a.dashboard.name < b.dashboard.name) (
            builtins.filter
            (a:
              a.dashboard.category
              != null
              && a.dashboard.category == cat.tag
              || a.dashboard.category == null && cat.tag == "misc")
            apps
          );
        in {
          inherit (cat) name;
          items = lib.forEach catApps (a: {
            inherit (a.dashboard) method name type url;
            subtitle = a.dashboard.description;
            icon = lib.optionalString (a.dashboard.icon != null) "fas fa-${a.dashboard.icon}";
            target = "_blank";
          });
        }
      );
  };
}