{ lib, config, options, pkgs, ... }:
let
  inherit (builtins)
    readFile
    ;

  inherit (config.hardware)
    pulseaudio
    ;
in
{
  programs.sway = {
    enable = true;

    extraSessionCommands = ''
      export SDL_VIDEODRIVER=wayland
      # needs qt5.qtwayland in systemPackages
      export QT_QPA_PLATFORM=wayland
      export QT_WAYLAND_DISABLE_WINDOWDECORATION="1"
      # Fix for some Java AWT applications (e.g. Android Studio),
      # use this if they aren't displayed properly:
      export _JAVA_AWT_WM_NONREPARENTING=1
    '';

    extraPackages = with pkgs; options.programs.sway.extraPackages.default
    ++ [
      qt5.qtwayland
      alacritty
      volnoti
      wl-clipboard
      (waybar.override { pulseSupport = pulseaudio.enable; })
    ]
    ;
  };

  environment.etc = {
    "sway/config".text = let
      volnoti = pkgs.writeScript "volnoti.sh" (import ./volnoti.nix { inherit pkgs; });
    in
      ''
        set $volume ${volnoti}

        # set background
        output * bg ${pkgs.adapta-backgrounds}/share/backgrounds/adapta/tri-fadeno.jpg fill

        ${readFile ./config}
      '';

    "xdg/waybar".source = ./waybar;
  };

  programs.tmux.extraTmuxConf = lib.mkBefore ''
    set -g @override_copy_command 'wl-copy'
  '';

  services.redshift = {
    enable = true;
    temperature.night = 3200;
  };

  location = {
    latitude = 38.833881;
    longitude = -104.821365;
  };

  systemd.user.targets.sway-session = {
    enable = true;
    description = "sway compositor session";
    documentation = [ "man:systemd.special(7)" ];

    bindsTo = [ "graphical-session.target" ];
    wants = [ "graphical-session-pre.target" ];
    after = [ "graphical-session-pre.target" ];
    requiredBy = [ "graphical-session.target" "graphical-session-pre.target" ];
  };

  systemd.user.services.volnoti = {
    enable = true;
    description = "volnoti volume notification";
    documentation = [ "volnoti --help" ];
    wantedBy = [ "sway-session.target" ];

    script = ''${pkgs.volnoti}/bin/volnoti -n'';

    serviceConfig = {
      Restart = "always";
      RestartSec = 3;
    };
  };

  nixpkgs.overlays = let
    overlay = self: super: {
      redshift = super.redshift.overrideAttrs (
        o: {
          src = super.fetchFromGitHub {
            owner = "CameronNemo";
            repo = "redshift";
            rev = "39c162ca487a59857c2eac231318f4b28855798b";
            sha256 = "1in27draskwwi097wiam26bx2szcf58297am3gkyng1ms3rz6i58";
          };
        }
      );
      wl-clipboard = super.wl-clipboard.overrideAttrs (
        o: {
          src = super.fetchFromGitHub {
            owner = "bugaevc";
            repo = "wl-clipboard";
            rev = "c010972e6b0d2eb3002c49a6a1b5620ff5f7c910";
            sha256 = "020l3jy9gsj6gablwdfzp1wfa8yblay3axdjc56i9q8pbhz7g12j";
          };
        }
      );
    };
  in
    [ overlay ];
}