{ pkgs, lib, ... }:

let
  # Format: "<remote>:<app-id>"
  flatpakApps = [
    "flathub:in.cinny.Cinny"
  ];

  installScript = pkgs.writeShellScript "flatpak-setup" ''
    ${pkgs.flatpak}/bin/flatpak remote-add --if-not-exists flathub \
      https://dl.flathub.org/repo/flathub.flatpakrepo

    ${lib.concatMapStringsSep "\n" (
      entry:
      let
        parts = lib.splitString ":" entry;
        remote = lib.elemAt parts 0;
        appId = lib.elemAt parts 1;
      in
      ''
        ${pkgs.flatpak}/bin/flatpak install --assumeyes --noninteractive \
          ${remote} ${appId} || true
      ''
    ) flatpakApps}
  '';
in
{
  services.flatpak.enable = true;

  environment.sessionVariables = {
    XDG_DATA_DIRS = [
      "/var/lib/flatpak/exports/share"
      "\${HOME}/.local/share/flatpak/exports/share"
    ];
  };

  system.activationScripts.flatpakSetup = {
    text = ''
      ${installScript}
    '';
    deps = [ ];
  };
}