# Initial install:
#   Install nix: https://github.com/nixOS/nix-installer
#   sudo nix run nix-darwin -- switch --flake .#garak
#
# Update after that:
#   sudo darwin-rebuild switch --flake .#garak
#
# Manual:
#   Install rosetta to run x86_64 programs:
#   softwareupdate --install-rosetta --agree-to-license
#
#   Install homebrew for installing graphical apps:
#   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
{
  description = "nix-darwin system flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    nix-darwin.url = "github:nix-darwin/nix-darwin/master";
    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = inputs@{ self, nix-darwin, nixpkgs }:
  let
    configuration = { pkgs, ... }: {
      # List packages installed in system profile. To search by name, run:
      # $ nix-env -qaP | grep wget
      environment.systemPackages =
        [
          pkgs.tmux
          pkgs.htop
          pkgs.git
        ];

      # Necessary for using flakes on this system.
      nix.settings.experimental-features = "nix-command flakes";

      # Enable alternative shell support in nix-darwin.
      # programs.fish.enable = true;

      # Set Git commit hash for darwin-version.
      system.configurationRevision = self.rev or self.dirtyRev or null;

      # Used for backwards compatibility, please read the changelog before changing.
      # $ darwin-rebuild changelog
      system.stateVersion = 6;

      # The platform the configuration will be used on.
      nixpkgs.hostPlatform = "aarch64-darwin";

      # Identifies which user some settings apply to.
      system.primaryUser = "talexander";

      # Enable Linux VM for building Linux binaries.
      #
      # Test with:
      #   nix build --impure --expr '(with import <nixpkgs> { system = "aarch64-linux"; }; runCommand "foo" {} "uname -a > $out")'
      nix.linux-builder.enable = true;

      # system.defaults.CustomUserPreferences = {
      #   "com.apple.desktopservices" = {
      #     # Do not write .DS_Store files to external volumes
      #     DSDontWriteNetworkStores = true;
      #     DSDontWriteUSBStores = true;
      #   };
      #   "com.apple.screensaver" = {
      #     # Ask for password when returning from screensaver
      #     askForPassword = 1;
      #     askForPasswordDelay = 0;
      #   };
      #   "com.apple.SoftwareUpdate" = {
      #     AutomaticCheckEnabled = true;
      #     # Download updates in the background
      #     AutomaticDownload = 1;
      #   };
      # };

      # Use homebrew to install graphical apps from casks.
      # homebrew = {
      #   enable = false;

      #   casks = [
      #     "firefox"
      #   ];
      # };

      # system.defaults = {
      #   dock = {
      #     autohide = true;
      #   };
      # };

      environment.variables = {
        TERMINFO_DIRS = ["${pkgs.alacritty.terminfo.outPath}/share/terminfo"];
      };

      power = {
        sleep = {
          # sudo pmset -a displaysleep 10 sleep 0 disksleep 10
          # Other options to consider: lowpowermode 0 standby 0 hibernatemode 0 powernap 0
          #
          # Defaults:
          #   standby              0
          #   Sleep On Power Button 1
          #   autorestartatconnect 0
          #   autorestart          0
          #   powernap             1
          #   networkoversleep     0
          #   disksleep            10
          #   sleep                1
          #   ttyskeepawake        1
          #   displaysleep         10
          #   tcpkeepalive         1
          #   womp                 1
          #
          computer = "never";
          display = 10;
          harddisk = 10;
        };
      };
    };
  in
  {
    darwinConfigurations."garak" = nix-darwin.lib.darwinSystem {
      modules = [ configuration ];
    };
  };
}