# nixos-config - My current NixOS configuration
#
# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
# SPDX-License-Identifier: GPL-3.0-or-later
#
# This file is part of my nixos-config.
#
# You should have received a copy of the License along with this program.
# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
{
  pkgs,
  lib,
  config,
  ...
}: let
  lf-wrapper = pkgs.writeShellApplication {
    name = "lf-wrapper";

    runtimeInputs = [pkgs.lf pkgs.alacritty];
    inheritPath = true;

    text = builtins.readFile ./scripts/lf-wrapper.sh;
  };

  url-handler = pkgs.writeShellApplication {
    name = "url-handler";

    runtimeInputs = [pkgs.rofi pkgs.libnotify pkgs.zathura pkgs.tskm];

    # We need to run the browser in tskm or nvim and alacritty.
    inheritPath = true;

    text = builtins.readFile ./scripts/url-handler.sh;
  };

  tfcConfigFile = (pkgs.formats.ini {}).generate "xdg-desktop-portal-termfilechooser.ini" {
    filechooser = {
      default_dir = "/tmp";
      cmd = "${lib.getExe lf-wrapper}";
    };
  };

  cfg = config.soispha.xdg;
in {
  options.soispha.xdg = {
    enable = lib.mkEnableOption "xdg";
  };

  config = lib.mkIf cfg.enable {
    home-manager.users.soispha.xdg = let
      inherit (config.home-manager.users.soispha.home) homeDirectory;
    in {
      enable = true;

      configFile."xdg-desktop-portal-termfilechooser/config".source = tfcConfigFile;

      configHome = "${homeDirectory}/.config";
      dataHome = "${homeDirectory}/.local/share";
      stateHome = "${homeDirectory}/.local/state";
      cacheHome = "${homeDirectory}/.cache";

      userDirs = {
        enable = true;

        # TODO: We shouldn't build on these variables to exist, but currently my config
        # might expect them. So let's just keep it. See here for a full explanation:
        # https://github.com/nix-community/home-manager/pull/7937#issuecomment-3372232126
        # <2026-04-14>
        setSessionVariables = true;

        createDirectories = true;

        documents = "${homeDirectory}/documents/general";
        download = "/tmp/download";
        music = "${homeDirectory}/media/music";
        pictures = "${homeDirectory}/media/pictures";
        videos = "${homeDirectory}/media/videos";

        templates = null;
        publicShare = null;
        desktop = null;
      };

      desktopEntries = {
        url-handler = {
          name = "url-handler";
          genericName = "Web Browser";
          exec = "${lib.getExe url-handler} %u";
          terminal = false;
          categories = [
            "Application"
            "Network"
            "WebBrowser"
          ];
          mimeType = [
            "text/html"
            "text/xml"
            "x-scheme-handler/http"
            "x-scheme-handler/https"
            "x-scheme-handler/about"
            "x-scheme-handler/unknown"
          ];
        };
      };
    };

    xdg = {
      mime = {
        enable = true;
        defaultApplications = {
          "application/pdf" = ["url-handler.desktop"];
          "application/x-pdf" = ["url-handler.desktop"];

          "text/html" = ["url-handler.desktop"];
          "text/xml" = ["url-handler.desktop"];
          "x-scheme-handler/http" = ["url-handler.desktop"];
          "x-scheme-handler/https" = ["url-handler.desktop"];
          "x-scheme-handler/about" = ["url-handler.desktop"];
          "x-scheme-handler/unknown" = ["url-handler.desktop"];
        };
      };

      portal = {
        enable = true;
        wlr = {
          enable = true;
        };

        config = {
          common = {
            default = ["wlr"];
            "org.freedesktop.impl.portal.FileChooser" = ["termfilechooser"];
          };

          # TODO: Also activate, when on another wlr-based compositor <2023-11-25>
          river = {
            default = ["wlr"];
            "org.freedesktop.impl.portal.FileChooser" = ["termfilechooser"];
          };
        };

        extraPortals = [
          pkgs.xdg-desktop-portal-wlr
          pkgs.xdg-desktop-portal-termfilechooser
        ];
      };
    };

    services.dbus.enable = true;

    systemd.user.services.xdg-desktop-portal-termfilechooser = {
      serviceConfig.ExecStart = [
        ""
        "${pkgs.xdg-desktop-portal-termfilechooser}/libexec/xdg-desktop-portal-termfilechooser --loglevel=TRACE"
      ];
    };
  };
}