dotfiles/home-modules/helix.nix

{ pkgs, pkgs-unstable, lib, rice, ... }:
{
  home = {
    packages = with pkgs; [
      # nixfmt-classic # nix formater
      # nil # nix language server
      # nixd # specified in nixd.nix
      python311Packages.python-lsp-server
      jdt-language-server
      ruff
      ruff-lsp
      pyright
      lldb # debugger for llvm stuff
      yaml-language-server # yaml
      marksman # markdown
      vale-ls # style-checker lsp (needs vale)
      ltex-ls # Ltex (language tool)
    ] ++ (with pkgs-unstable; [
      bash-language-server
      helix
    ]);
    sessionVariables = {
      EDITOR = "hx";
      VISUAL = "hx";
    };
  };
  programs.helix = {
    enable = true;
    defaultEditor = true;
    package = pkgs-unstable.helix;
    settings = {
      # theme = "base16_terminal";
      theme = "base16";
      editor = {
        cursor-shape = {
          normal = "block";
          insert = "bar";
          select = "underline";
        };
        soft-wrap = {
          enable = true;
        };
        line-number = "relative";
        color-modes = true;
        bufferline = "always";
        popup-border = "all";
        completion-trigger-len = 1;
        completion-timeout = 5; 
        file-picker.hidden = false;
        middle-click-paste = false;
        cursorline = true;
        indent-guides = {
          render = true;
          character = "╎";
        };
        lsp.display-inlay-hints = true;
        statusline.center = [ "position-percentage" ];
        true-color = true;
        whitespace.characters = {
          newline = "↴";
          tab = "⇥";
          skip-levels = 1;
        };
      };
      keys.normal = {
        "C-g" = [ ":new" ":insert-output lazygit" ":buffer-close!" ":redraw" ];
        "A-`" = [ "no_op" ];
        "`"   = [ "no_op" ];
      };
      keys.normal."ö" = {
        "s" = [ "switch_case" ];
        "u" = [ "switch_to_uppercase" ];
        "l" = [ "switch_to_lowercase" ];
      };
    };
    languages = {
      language = [
        {
          name = "nix";
          language-servers = [ "nixd" "nil" ]; 
        }
        {
          name = "latex";
          language-servers = [ "texlab" "language-tool" ]; 
        }
        {
          name = "markdown";
          # language-servers = [ "marksman" "style-check" "language-tool" ];
          language-servers = [ "language-tool" "marksman" ];
          file-types = [ "md" "MD" ];
          scope = "text.<name>";
        }

        {
          name = "python";
          language-servers = [ "pyright" "ruff" ];
          formatter = {
            command = "ruff";
            args = [
              "format"
              "--line-length"
              "120"
              "-"
            ];
          };
          debugger = {
            name = "debugpy";
            transport = "stdio";
            command = "python";
            args = [ "-m" "debugpy.adapter" ];
            templates = [{
              name = "source";
              request = "launch";
              completion = [{
                name = "entrypoint";
                completion = "filename";
                default = ".";
              }];
              args = {
                mode = "debug";
                program = "{0}";
              };
            }];
          };
        }
      ];
      language-server = {
        "nixd" = {
          command = "nixd";
        };
        "style-check" = {
          command = lib.getExe pkgs.vale-ls; 
        };
        "language-tool" = {
          command = "${pkgs.ltex-ls}/bin/ltex-ls";
        };
        "ruff" = {
          command = "ruff-lsp";
          config.settings.args = [
            # Set line length
            "--line-length"
            "240"
            # Enable custom ruff rules
            # "--select" lib.concatStringsSep [ ]
          ];
        };
      };
    };
    themes = {
      base16 = with rice.color; {
        "attributes" = foreground; 
        "comment" = {
          "fg" = white.dark;
          "modifiers" = [ "italic" ];
        };
        "constant" = accent.bright; 
        "constant.character.escape" = special.bright;
        "constant.numeric" = foreground; 
        "constructor" = weird.base;
        "debug" = yellow.base;
        "diagnostic.modifiers" = [ "underlined" ];
        "diff.delta" = blue.bright; 
        "diff.minus" = negative.bright; 
        "diff.plus" = positive.bright; 
        "error" = red.base; 
        "function" = secondary.bright; 
        "hint" = tertiary.bright;
        "info" = foreground; 
        "keyword" = special.base;
        "label" = foreground;
        "namespace" = weird.bright;
        "operator" = foreground;
        "special" = special.base; 
        "string" = secondary.bright; 
        "type" = red.base; 
        "variable" = accent.base; 
        "variableother.member" = foreground; 
        "warning" = red.base; 

        "markup.heading" = accent.base; 
        "markup.bold" = {
          "fg" = tertiary.bright; 
          "modifiers" = [ "bold" ];
        };
        "italic" = {
          "fg" = secondary.bright;
          "modifiers" = [ "italic" ];
        };
        "markup.linktext" = accent.base; 
        "markup.linkurl" = {
          "fg" = tertiary.dark; 
          "modifiers" = [ "underlined" ];
        };
        "markup.list" = accent.bright; 
        "markup.quote" = weird.bright; 
        "markup.raw" = special.bright; 
        "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" = { # general background of the editor window
          "bg" = background;
        };
        "ui.bufferline" = { # the top line ("tab"-line)
          "fg" = accent.base;
          "bg" = black.base;
        };
        "ui.bufferline.active" = { # the active "tab"
          "fg" = background;
          "bg" = accent.base;
          "modifiers" = [ "bold" ];
        }; 
        "ui.cursor" = { # the cursor in Normal mode
          "fg" = foreground;
          "modifiers" = [ "reversed" ];
        };
        "ui.cursorline.primary" = { # the line on which the cursor is on
          "bg" = black.base;
        };
        "ui.cursor.match" = { # Matching bracket etc.
          "bg" = green.dark;
          "modifiers" = [ ];
        };
        "ui.gutter" = {
          "bg" = black.base;
        };
        "ui.help" = {
          "fg" = green.base;
          "bg" = black.base;
        };
        "ui.linenr" = {
          "fg" = white.dark;
          "bg" = black.base;
        };
        "ui.linenr.selected" = {
          "fg" = accent.bright;
          "modifiers" = [ "bold" ];
        };
        "ui.menu" = {
          "fg" = accent.base;
          "bg" = black.base;
        };
        "ui.menu.scroll" = {
          "fg" = yellow.dark;
          "bg" = background;
        };
        "ui.menu.selected" = {
          "fg" = red.base;
          "bg" = blue.dark;
        };
        "ui.popup" = {
          "bg" = black.base;
        };
        "ui.selection" = {
          "bg" = white.dark;
        };
        "ui.selection.primary" = {
          "bg" = black.bright;
        };
        "ui.statusline" = {
          "fg" = blue.bright;
          "bg" = black.base;
        };
        "ui.statusline.inactive" = {
          "fg" = red.bright;
          "bg" = red.dark;
        };
        "ui.statusline.insert" = {
          "fg" = green.bright;
          "bg" = green.dark;
        };
        "ui.statusline.normal" = {
          "fg" = yellow.bright;
          "bg" = yellow.dark;
        };
        "ui.statusline.select" = {
          "fg" = cyan.bright;
          "bg" = cyan.dark;
        };
        "ui.text" = foreground;
        "ui.text.focus" = accent.base;
        "ui.virtual.indent-guide" = {
          "fg" = black.bright;
        };
        "ui.virtual.inlay-hint" = {
          "fg" = weird.bright;
          "bg" = weird.dark;
        };
        "ui.virtual.ruler" = {
          "bg" = background;
        };
        "ui.window" = {
          "bg" = black.base;
        };
      };
    };
  };
}