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

let
  moduleName = "hm-default-apps";
in
{
  # Ensure update-mime-database is available
  home.packages = with pkgs; [
    shared-mime-info
  ];

  # Teach the MIME DB that *.nix files are text/x-nix
  xdg.dataFile."mime/packages/custom-text-types.xml".text = ''
  <?xml version="1.0" encoding="UTF-8"?>
  <mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">

    <mime-type type="text/x-nix">
      <comment>Nix expression</comment>
      <sub-class-of type="text/plain"/>
      <glob pattern="*.nix"/>
    </mime-type>

    <mime-type type="text/x-ini">
      <comment>Configuration file</comment>
      <sub-class-of type="text/plain"/>
      <glob pattern="*.conf"/>
    </mime-type>

  </mime-info>
'';

  # Rebuild user MIME database after HM writes xdg.dataFile files
  home.activation.updateMimeDatabase =
    lib.hm.dag.entryAfter [ "writeBoundary" ] ''
      ${pkgs.shared-mime-info}/bin/update-mime-database ${config.xdg.dataHome}/mime
    '';

  xdg.mimeApps.enable = true;

  xdg.mimeApps.defaultApplications = {
    # Nix files
    "text/x-nix" = [ "org.kde.kate.desktop" ];
    "text/plain" = [ "org.kde.kate.desktop" ];
    "text/x-ini" = [ "org.kde.kate.desktop" ];
    "application/x-desktop" = [ "org.kde.kate.desktop" ];

    # Zen Browser (Flatpak)
    "x-scheme-handler/http"  = [ "app.zen_browser.zen.desktop" ];
    "x-scheme-handler/https" = [ "app.zen_browser.zen.desktop" ];
    "text/html"              = [ "app.zen_browser.zen.desktop" ];

    # Email
    "x-scheme-handler/mailto" = [ "eu.betterbird.Betterbird.desktop" ];
    "message/rfc822"          = [ "eu.betterbird.Betterbird.desktop" ];

    # Calendar (common handlers)
    "text/calendar"            = [ "eu.betterbird.Betterbird.desktop" ];
    "application/ics"          = [ "eu.betterbird.Betterbird.desktop" ];
    "application/calendar"     = [ "eu.betterbird.Betterbird.desktop" ];
    "x-scheme-handler/webcal"  = [ "eu.betterbird.Betterbird.desktop" ];
    "x-scheme-handler/webcals" = [ "eu.betterbird.Betterbird.desktop" ];

    # File manager
    "inode/directory" = [ "org.kde.dolphin.desktop" ];
  };
  home.file.".nixlog/loaded.${moduleName}-module-loaded".text = "loaded\n";
}