nixos-config/user/neomutt/default.nix

{ pkgs, lib, config, ... }:
let
  inherit (pkgs.uservars) key;
  inherit (lib) toUpper;

  mkControlBind = key: ''"^${ key }"'';
  mkAltBind = key: ''"\e${ key }"'';

  mkDirectionBinds' = filter: modes: commands: map
    (direction: lib.mkIf (lib.hasAttr direction commands) {
      map = modes;
      key = filter key.${direction};
      action = commands.${direction};
    }) [ "left" "down" "up" "right" ];

  mkDirectionBinds = mkDirectionBinds' (x: x);
  mkDirectionBindsControl = mkDirectionBinds' mkControlBind;

in
{
  programs.neomutt.enable = true;
  programs.neomutt.sidebar.enable = false;
  programs.neomutt.sort = "reverse-date";
  programs.neomutt.binds =
    (mkDirectionBindsControl [ "index" "pager" ] {
      up = "half-up";
      down = "half-down";
    }) ++
    (mkDirectionBindsControl [ "index" "pager" ] {
      left = "sidebar-toggle-visible";
      down = "sidebar-next";
      up = "sidebar-prev";
      right = "sidebar-open";
    }) ++
    (mkDirectionBinds [ "index" ] {
      left = "noop";
      down = "next-entry";
      up = "previous-entry";
      right = "display-message";
    }) ++
    (mkDirectionBinds [ "pager" ] {
      left = "exit";
      down = "next-line";
      up = "previous-line";
      right = "view-attachments";
    }) ++
    (mkDirectionBinds [ "attach" ] {
      left = "exit";
      down = "next-entry";
      up = "previous-entry";
      right = "view-mailcap";
    }) ++ [
      # {
      #   map = [ "index" ];
      #   key = key.left;
      #   action = "noop";
      # }
      # {
      #   map = [ "index" ];
      #   key = key.down;
      #   action = "next-entry";
      # }
      # {
      #   map = [ "index" ];
      #   key = key.up;
      #   action = "previous-entry";
      # }
      # {
      #   map = [ "index" ];
      #   key = key.right;
      #   action = "display-message";
      # }

      # {
      #   map = [ "attach" ];
      #   key = key.left;
      #   action = "exit";
      # }
      # {
      #   map = [ "attach" ];
      #   key = key.down;
      #   action = "next-entry";
      # }
      # {
      #   map = [ "attach" ];
      #   key = key.up;
      #   action = "previous-entry";
      # }
      # {
      #   map = [ "attach" ];
      #   key = key.right;
      #   action = "view-mailcap";
      # }

      # {
      #   map = [ "pager" ];
      #   key = key.left;
      #   action = "exit";
      # }
      # {
      #   map = [ "pager" ];
      #   key = key.down;
      #   action = "next-line";
      # }
      # {
      #   map = [ "pager" ];
      #   key = key.up;
      #   action = "previous-line";
      # }
      # {
      #   map = [ "pager" ];
      #   key = key.right;
      #   action = "view-attachments";
      # }

      # {
      #   map = [ "index" "pager" "browser" ];
      #   key = toUpper key.up;
      #   action = "half-up";
      # }
      # {
      #   map = [ "index" "pager" "browser" ];
      #   key = toUpper key.down;
      #   action = "half-down";
      # }

      {
        map = [ "browser" ];
        key = key.left;
        action = "goto-parent";
      }

      # {
      #   map = [ "index" "pager" ];
      #   key = mkControlBind key.down;
      #   action = "sidebar-next";
      # }
      # {
      #   map = [ "index" "pager" ];
      #   key = mkControlBind key.up;
      #   action = "sidebar-prev";
      # }
      # {
      #   map = [ "index" "pager" ];
      #   key = mkControlBind key.right;
      #   action = "sidebar-open";
      # }
      # {
      #   map = [ "index" "pager" ];
      #   key = mkControlBind key.left;
      #   action = "sidebar-toggle-visible";
      # }

    ];
  programs.neomutt.extraConfig = ''
    source extra
  '';
  xdg.configFile."neomutt/extra".source = config.lib.file.mkOutOfStoreSymlink "/home/lelgenio/projects/nixos-config/user/neomutt/neomuttrc";
}