{
  lib,
  pkgs,
  libraries,
  config,
  ...
}: let
  index2tag = input: builtins.toString (libraries.base.pow 2 (input - 1));

  mkTagCommand = name: index: [name (index2tag index)];
  mkSpawn' = pkg: binaryName: args: {
    command = [
      "spawn"
      "${lib.getExe' pkgs binaryName} ${args}"
    ];

    description = "${binaryName} ${args}";
  };
  mkSpawn = pkg: args: (mkSpawn' pkg pkg.meta.mainProgram args);

  cfg = config.soispha.programs.river;
in {
  soispha.programs.river.init.mappings.keymap = lib.mkIf cfg.enable {
    "<SUPER_LEFT>" = {
      # Change focus
      "f" = {
        "t" = ["focus-view" "next"];
        "n" = ["focus-view" "previous"];
        "<Ctrl-t>" = ["focus-output" "next"];
        "<Ctrl-n>" = ["focus-output" "previous"];
      };

      # Spawn standard programs
      "r" = {
        "a" = mkSpawn pkgs.alacritty "";
        "b" = mkSpawn pkgs.tskm "open select";
        "k" = mkSpawn pkgs.keepassxc "";
        "s" = mkSpawn pkgs.signal-desktop "";
        "p" = mkSpawn pkgs.screenshot_persistent "";
      };

      # Client changes
      "c" = {
        "f" = ["toggle-fullscreen"];
        "c" = ["close"];
        "<SPACE>" = ["toggle-float"];
        "<ENTER>" = ["zoom"];
        "o" = ["send-to-output" "next"];
        "t" = ["swap" "next"];
        "n" = ["swap" "previous"];
      };

      # River compositor control.
      "x" = {
        "q" = ["exit"];
        "l" = mkSpawn pkgs.lock "";
      };

      # Media control
      "m" = {
        "r" = mkSpawn' pkgs.wireplumber "wpctl" "set-volume @DEFAULT_SINK@ 5%+";
        "l" = mkSpawn' pkgs.wireplumber "wpctl" "set-volume @DEFAULT_SINK@ 5%-";
        "m" = mkSpawn pkgs.mpp "toggle";
      };

      # Select tags to view.
      "v" = {
        "0" = ["set-view-tags" (builtins.toString ((libraries.base.pow 2 32) - 1))];
        "p" = ["send-to-previous-tags"];

        "1" = mkTagCommand "set-view-tags" 1;
        "2" = mkTagCommand "set-view-tags" 2;
        "3" = mkTagCommand "set-view-tags" 3;
        "4" = mkTagCommand "set-view-tags" 4;
        "5" = mkTagCommand "set-view-tags" 5;
        "6" = mkTagCommand "set-view-tags" 6;
        "7" = mkTagCommand "set-view-tags" 7;
        "8" = mkTagCommand "set-view-tags" 8;
        "9" = mkTagCommand "set-view-tags" 9;

        # Add tags to view.
        "a" = {
          "1" = mkTagCommand "toggle-view-tags" 1;
          "2" = mkTagCommand "toggle-view-tags" 2;
          "3" = mkTagCommand "toggle-view-tags" 3;
          "4" = mkTagCommand "toggle-view-tags" 4;
          "5" = mkTagCommand "toggle-view-tags" 5;
          "6" = mkTagCommand "toggle-view-tags" 6;
          "7" = mkTagCommand "toggle-view-tags" 7;
          "8" = mkTagCommand "toggle-view-tags" 8;
          "9" = mkTagCommand "toggle-view-tags" 9;
        };
      };

      # Select tags to focus.
      "f" = {
        "0" = ["set-focused-tags" (builtins.toString ((libraries.base.pow 2 32) - 1))];
        "p" = ["focus-previous-tags"];

        "1" = mkTagCommand "set-focused-tags" 1;
        "2" = mkTagCommand "set-focused-tags" 2;
        "3" = mkTagCommand "set-focused-tags" 3;
        "4" = mkTagCommand "set-focused-tags" 4;
        "5" = mkTagCommand "set-focused-tags" 5;
        "6" = mkTagCommand "set-focused-tags" 6;
        "7" = mkTagCommand "set-focused-tags" 7;
        "8" = mkTagCommand "set-focused-tags" 8;
        "9" = mkTagCommand "set-focused-tags" 9;
      };
    };

    # Audio
    "<MEDIA_RAISEVOLUME>" = {
      command = mkSpawn' pkgs.wireplumber "wpctl" "set-volume @DEFAULT_SINK@ 5%+";
      allow_locked = true;
    };
    "<MEDIA_LOWERVOLUME>" = {
      command = mkSpawn' pkgs.wireplumber "wpctl" "set-volume @DEFAULT_SINK@ 5%-";
      allow_locked = true;
    };
    "<MEDIA_MUTEVOLUME>" = {
      command = mkSpawn pkgs.mpp "toggle";
      allow_locked = true;
    };

    # Mouse
    "<Meta-<MOUSE_LEFT>>" = ["move-view"];
    "<Meta-<MOUSE_RIGHT>>" = ["resize-view"];

    # Lock screen.
    "<Meta-L>" = mkSpawn pkgs.lock "";

    # Screenshot
    "<PRINTSCREEN>" = mkSpawn pkgs.screenshot_persistent "";
  };
}