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

{
  # Enable User Setup
  # https://rycee.gitlab.io/home-manager/index.html#sec-install-nix-darwin-module
  imports = [ <home-manager/nix-darwin> ];
  home-manager.useGlobalPkgs = true;

  # System settings
  # Explained: https://gist.github.com/MatthewEppelsheimer/2269385
  system.defaults = {
    NSGlobalDomain = {
      AppleKeyboardUIMode = 3;
      ApplePressAndHoldEnabled = false;
      InitialKeyRepeat = 12;   # Default: 15
      KeyRepeat = 1;           # Default: 2
      NSAutomaticCapitalizationEnabled = false;
      NSAutomaticDashSubstitutionEnabled = false;
      NSAutomaticPeriodSubstitutionEnabled = false;
      NSAutomaticQuoteSubstitutionEnabled = false;
      NSAutomaticSpellingCorrectionEnabled = false;
      NSNavPanelExpandedStateForSaveMode = true;
      NSNavPanelExpandedStateForSaveMode2 = true;
      _HIHideMenuBar = true;
    };

    dock = {
      autohide = true;
      mru-spaces = false;
      # orientation = "left";
      showhidden = true;
    };

    finder.AppleShowAllExtensions = true;
    finder.FXEnableExtensionChangeWarning = false;

    trackpad.Clicking = true;
    trackpad.TrackpadThreeFingerDrag = true;
  };

  # List packages installed in system profile. To search by name, run:
  # $ nix-env -qaP | grep wget
  environment.systemPackages = with pkgs; with pkgs.nodePackages; [
    config.programs.vim.package

    # rust cli tools
    bandwhich bat exa fd ripgrep tokei xsv

    # development
    amp curl git go golangci-lint hadolint hugo jq shellcheck #yq

    # git extras
    gitAndTools.hub gitAndTools.lab

    # nodePackages
    # npm ls -g --depth=0
    yaml-language-server bash-language-server typescript-language-server vscode-json-languageserver-bin
    dockerfile-language-server-nodejs js-beautify prettier serverless jsonlint
    # textlint textlint-rule-terminology textlint-rule-stop-words textlint-rule-write-good
    # TODO: (need derivations or switch tools)
    # markdown-spellcheck markdownlint-cli

    # shell
    antibody nix-zsh-completions direnv fzf tmux urlview whois zsh
    (pass.withExtensions (ext: with ext; [ pass-otp ]))

    # operations
    awscli bash-my-aws conftest k9s pulumi-bin openssh terraform tfsec vault
    # vault-token-helper ?

    # system info
    htop neofetch

    # utils
    nmap pandoc parallel enchant

    #darwin-zsh-completions
    #cachix
    # https://github.com/mlvzk/manix
  ];

  environment.variables.LANG = "en_US.UTF-8";
  # environment.systemPath = [
  #   "/Applications/Docker.app/Contents/Resources/bin"
  # ];

  environment.shells = with pkgs; [
    bashInteractive zsh
  ];
  environment.shellAliases.vim = "nvim";

  services.yabai = {
    enable = true;
    package = pkgs.yabai;
    enableScriptingAddition = true;
  };
  services.skhd.enable = true;
  services.spacebar = {
   enable = true;
   package = pkgs.spacebar;
   config = {
     position          = "top";
     text_font         = ''"Helvetica Neue:Bold:12.0"'';
     icon_font         = ''"FontAwesome:Regular:12.0"'';
     background_color  = "0xff202020";
     foreground_color  = "0xffa8a8a8";
     space_icon_strip  = "α β γ δ ε ζ η θ ι";
     power_icon_strip  = " ";
     space_icon        = "";
     clock_icon        = "";
     dnd_icon          = "";
     clock_format      = "%R";
     # debug_output      = "off";
   };
  };

  # launchd.user.agents.spacebar.serviceConfig.StandardErrorPath = "/tmp/spacebar.err.log";
  # launchd.user.agents.spacebar.serviceConfig.StandardOutPath = "/tmp/spacebar.out.log";

  # Recreate /run/current-system symlink after boot
  services.activate-system.enable = true;

  # TODO Fonts ?
  fonts = {
    enableFontDir = true;
    fonts = with pkgs; [
      (nerdfonts.override {
        fonts = ["Hack" "Iosevka" "FiraCode"
                 "JetBrainsMono" "Meslo" "RobotoMono" "SourceCodePro"];
      })
      noto-fonts
      open-sans
    ];
  };
  
  # Auto upgrade nix package and the daemon service.
  services.nix-daemon.enable = true;
  nix.package = pkgs.nix;

  # Allow suggestions and quick searches with nix-index
  programs.nix-index.enable = true;

  # Create /etc/bashrc that loads the nix-darwin environment.
  programs.bash.enable = true;
  programs.zsh.enable = true;  # default shell on catalina

  nixpkgs.config.allowUnfree = true;

  # Enable NUR
  nixpkgs.config.packageOverrides = pkgs: {
    nur = import (builtins.fetchTarball "https://github.com/nix-community/NUR/archive/master.tar.gz") {
      inherit pkgs;
    };
  };

  nix.useSandbox = true;
  nix.sandboxPaths = [ "/System/Library/Frameworks" "/System/Library/PrivateFrameworks" "/usr/lib" "/private/tmp" "/private/var/tmp" "/usr/bin/env" ];
  nix.trustedUsers =  [ "@admin" ];

  programs.vim.package = pkgs.neovim.override {
      vimAlias = true;
      configure = {
        packages.darwin.start = with pkgs.vimPlugins; [
          vim-airline vim-airline-themes vim-sensible vim-surround vim-fugitive
          ReplaceWithRegister polyglot fzfWrapper ale deoplete-nvim vim-nix
          awesome-vim-colorschemes
        ];

        customRC = ''
        set encoding=utf-8
        set hlsearch
        set list
        set number
        set visualbell
        set showcmd
        set splitright
        set ttyfast

        " last line
        set showmode
        set showcmd

        cnoremap %% <C-r>=expand('%:h') . '/'<CR>
        nnoremap // :nohlsearch<CR>

        let mapleader = ' '

        " fzf
        nnoremap <Leader>p :FZF<CR>

        " vim-surround
        vmap s S

        " ale
        nnoremap <Leader>d :ALEGoToDefinition<CR>
        nnoremap <Leader>D :ALEGoToDefinitionInVSplit<CR>
        nnoremap <Leader>k :ALESignature<CR>
        nnoremap <Leader>K :ALEHover<CR>
        nnoremap [a :ALEPreviousWrap<CR>
        nnoremap ]a :ALENextWrap<CR>

        " deoplete
        inoremap <expr><C-g> deoplete#undo_completion()
        inoremap <expr><C-l> deoplete#refresh()
        inoremap <silent><expr><C-Tab> deoplete#mappings#manual_complete()
        inoremap <silent><expr><Tab> pumvisible() ? "\<C-n>" : "\<TAB>"

        let g:deoplete#enable_at_startup = 1

        " theme
        set t_Co=256
        set background=dark
        let g:airline_theme='base16'
        let g:airline_powerline_fonts = 1
        colorscheme nord
        '';
      };
  };

  # User specific setup
  # home-manager.users.sme = { pkgs, ... }: {
  #   home.packages = with pkgs; [
  #     parallel
  #   ];
  # };

  # home-manager.users.sme.programs.firefox.extensions =
  #   with pkgs.nur.repos.rycee.firefox-addons; [
  #     ublock-origin browserpass vimium
  #   ];

  # Use a custom configuration.nix location.
  # $ darwin-rebuild switch -I darwin-config=$HOME/.config/nixpkgs/darwin/configuration.nix
  # environment.darwinConfig = "$HOME/.config/nixpkgs/darwin/configuration.nix";

  # Used for backwards compatibility, please read the changelog before changing.
  # $ darwin-rebuild changelog
  system.stateVersion = 4;
}