# Copyright (c) 2019-2020, see AUTHORS. Licensed under MIT License, see LICENSE.

{ config ? null
, extraModules ? [ ]
, extraSpecialArgs ? { }
, pkgs ? import <nixpkgs> { }
, home-manager-path ? <home-manager>
, isFlake ? false
}:

with pkgs.lib;

let
  defaultConfigFile = "${builtins.getEnv "HOME"}/.config/nixpkgs/nix-on-droid.nix";

  configModule =
    if config != null then config
    else if builtins.pathExists defaultConfigFile then defaultConfigFile
    else pkgs.config.nix-on-droid or (throw "No config file found! Create one in ~/.config/nixpkgs/nix-on-droid.nix");

  rawModule = evalModules {
    modules = [
      {
        _module.args =
          {
            inherit home-manager-path isFlake;
            pkgs = mkDefault pkgs;
          }
          // extraSpecialArgs;
      }
      configModule
    ]
    ++ extraModules
    ++ import ./module-list.nix { inherit pkgs isFlake; };
  };

  failedAssertions = map (x: x.message) (filter (x: !x.assertion) rawModule.config.assertions);

  module =
    if failedAssertions != [ ]
    then throw "\nFailed assertions:\n${concatMapStringsSep "\n" (x: "- ${x}") failedAssertions}"
    else showWarnings rawModule.config.warnings rawModule;
in

{
  inherit (module.config.build) activationPackage;
  inherit (module) config options;
}