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

let
  cfg = config.nmasur.presets.programs.helix;
in

{

  options.nmasur.presets.programs.helix.enable = lib.mkEnableOption "Helix text editor";

  config = lib.mkIf cfg.enable {

    # Use Neovim as the editor for git commit messages
    programs.git.extraConfig.core.editor = lib.mkForce "${lib.getExe pkgs.helix}";
    programs.jujutsu.settings.ui.editor = lib.mkForce "${lib.getExe pkgs.helix}";

    # Set Neovim as the default app for text editing and manual pages
    home.sessionVariables = {
      EDITOR = lib.mkForce "${lib.getExe pkgs.helix}";
    };

    programs.helix = {

      enable = true;

      languages = {

        language-server.nixd = {
          command = "${pkgs.nixd}/bin/nixd";
        };

        language-server.fish-lsp = {
          command = "${pkgs.fish-lsp}/bin/fish-lsp";
        };

        language = [
          {
            name = "nix";
            auto-format = true;
            language-servers = [ "nixd" ];
          }
        ];

      };

      settings = {
        theme = "base16";
        editor = {
          # Change cursors depending on the mode
          cursor-shape = {
            insert = "bar";
            normal = "block";
            select = "underline";
          };

          # View line numbers relative to the current cursors
          line-number = "relative";

          # Show whitespace visible to the user
          # Waiting for trailing whitespace option ideally
          whitespace = {
            render = {
              # space = "all";
              tab = "all";
            };
            characters = {
              # space = "·";
              tab = "→";
            };
          };
        };
      };

      themes."${config.programs.helix.settings.theme}" = {
        "attributes" = config.theme.colors.base09;
        "comment" = {
          fg = config.theme.colors.base03;
          modifiers = [ "italic" ];
        };
        "constant" = config.theme.colors.base09;
        "constant.character.escape" = config.theme.colors.base0C;
        "constant.numeric" = config.theme.colors.base09;
        "constructor" = config.theme.colors.base0D;
        "debug" = config.theme.colors.base03;
        "diagnostic" = {
          modifiers = [ "underlined" ];
        };
        "diff.delta" = config.theme.colors.base09;
        "diff.minus" = config.theme.colors.base08;
        "diff.plus" = config.theme.colors.base0B;
        "error" = config.theme.colors.base08;
        "function" = config.theme.colors.base0D;
        "hint" = config.theme.colors.base03;
        "info" = config.theme.colors.base0D;
        "keyword" = config.theme.colors.base0E;
        "label" = config.theme.colors.base0E;
        "namespace" = config.theme.colors.base0E;
        "operator" = config.theme.colors.base05;
        "special" = config.theme.colors.base0D;
        "string" = config.theme.colors.base0B;
        "type" = config.theme.colors.base0A;
        "variable" = config.theme.colors.base08;
        "variable.other.member" = config.theme.colors.base0B;
        "warning" = config.theme.colors.base09;
        "markup.bold" = {
          fg = config.theme.colors.base0A;
          modifiers = [ "bold" ];
        };
        "markup.heading" = config.theme.colors.base0D;
        "markup.italic" = {
          fg = config.theme.colors.base0E;
          modifiers = [ "italic" ];
        };
        "markup.link.text" = config.theme.colors.base08;
        "markup.link.url" = {
          fg = config.theme.colors.base09;
          modifiers = [ "underlined" ];
        };
        "markup.list" = config.theme.colors.base08;
        "markup.quote" = config.theme.colors.base0C;
        "markup.raw" = config.theme.colors.base0B;
        "markup.strikethrough" = {
          modifiers = [ "crossed_out" ];
        };
        "diagnostic.hint" = {
          underline = {
            style = "curl";
          };
        };
        "diagnostic.info" = {
          underline = {
            style = "curl";
          };
        };
        "diagnostic.warning" = {
          underline = {
            style = "curl";
          };
        };
        "diagnostic.error" = {
          underline = {
            style = "curl";
          };
        };
        "ui.background" = {
          bg = config.theme.colors.base00;
        };
        "ui.bufferline.active" = {
          fg = config.theme.colors.base00;
          bg = config.theme.colors.base03;
          modifiers = [ "bold" ];
        };
        "ui.bufferline" = {
          fg = config.theme.colors.base04;
          bg = config.theme.colors.base00;
        };
        "ui.cursor" = {
          fg = config.theme.colors.base0A;
          modifiers = [ "reversed" ];
        };
        "ui.cursor.insert" = {
          fg = config.theme.colors.base0A;
          modifiers = [ "reversed" ];
        };
        "ui.cursorline.primary" = {
          fg = config.theme.colors.base05;
          bg = config.theme.colors.base01;
        };
        "ui.cursor.match" = {
          fg = config.theme.colors.base0A;
          modifiers = [ "reversed" ];
        };
        "ui.cursor.select" = {
          fg = config.theme.colors.base0A;
          modifiers = [ "reversed" ];
        };
        "ui.gutter" = {
          bg = config.theme.colors.base00;
        };
        "ui.help" = {
          fg = config.theme.colors.base06;
          bg = config.theme.colors.base01;
        };
        "ui.linenr" = {
          fg = config.theme.colors.base03;
          bg = config.theme.colors.base00;
        };
        "ui.linenr.selected" = {
          fg = config.theme.colors.base04;
          bg = config.theme.colors.base01;
          modifiers = [ "bold" ];
        };
        "ui.menu" = {
          fg = config.theme.colors.base05;
          bg = config.theme.colors.base01;
        };
        "ui.menu.scroll" = {
          fg = config.theme.colors.base03;
          bg = config.theme.colors.base01;
        };
        "ui.menu.selected" = {
          fg = config.theme.colors.base01;
          bg = config.theme.colors.base04;
        };
        "ui.popup" = {
          bg = config.theme.colors.base01;
        };
        "ui.selection" = {
          bg = config.theme.colors.base02;
        };
        "ui.selection.primary" = {
          bg = config.theme.colors.base03;
        };
        "ui.statusline" = {
          fg = config.theme.colors.base04;
          bg = config.theme.colors.base01;
        };
        "ui.statusline.inactive" = {
          bg = config.theme.colors.base01;
          fg = config.theme.colors.base03;
        };
        "ui.statusline.insert" = {
          fg = config.theme.colors.base00;
          bg = config.theme.colors.base0B;
        };
        "ui.statusline.normal" = {
          fg = config.theme.colors.base00;
          bg = config.theme.colors.base03;
        };
        "ui.statusline.select" = {
          fg = config.theme.colors.base00;
          bg = config.theme.colors.base0F;
        };
        "ui.text" = config.theme.colors.base05;
        "ui.text.focus" = config.theme.colors.base05;
        "ui.virtual.indent-guide" = {
          fg = config.theme.colors.base03;
        };
        "ui.virtual.inlay-hint" = {
          fg = config.theme.colors.base03;
        };
        "ui.virtual.ruler" = {
          bg = config.theme.colors.base01;
        };
        "ui.virtual.jump-label" = {
          fg = config.theme.colors.base0A;
          modifiers = [ "bold" ];
        };
        "ui.window" = {
          bg = config.theme.colors.base01;
        };
      };

    };

  };

}