{ pkgs, ... }:
let
  tree-sitter-url = "https://raw.githubusercontent.com/nvim-treesitter/nvim-treesitter/692b051b09935653befdb8f7ba8afdb640adf17b/runtime/queries/menhir/";
in
{
  programs.helix = {
    enable = true;
    defaultEditor = true;
    settings = {
      theme = "adwaita-light";
      editor.lsp.display-messages = true;
      editor.inline-diagnostics.cursor-line = "hint";
      editor.rulers = [ 81 ];
      editor.gutters.layout = [
        "diff"
        "diagnostics"
      ];
      keys.insert.j.k = "normal_mode";
    };
    languages = {
      language-server.tinymist = {
        config.exportPdf = "onSave";
        config.outputPath = "$root/$dir/out/$name";
      };
      language-server.scls = {
        command = "simple-completion-language-server";
        config.feature_words = false;
        config.feature_snippets = true;
        config.snippets_first = true;
        config.snippets_inline_by_word_tail = false;
        config.feature_unicode_input = true;
        config.feature_paths = false;
        config.feature_citations = false;
        environment.RUST_LOG = "info,simple-completion-language-server=info";
        environment.LOG_FILE = "/tmp/completion.log";
      };
      language-server.ocamllsp = {
        command = "ocamllsp";
        args = [ "--fallback-read-dot-merlin" ];
      };
      language-server.menhir-lsp = {
        command = "menhir-lsp";
      };
      language = [
        {
          name = "typst";
          language-servers = [
            "tinymist"
            "scls"
          ];
        }
        {
          name = "menhir";
          file-types = [ "mly" ];
          language-servers = [
            "menhir-lsp"
            "ocamllsp"
          ];
          scope = "source.menhir";
        }
      ];
      grammar = [
        {
          name = "menhir";
          source = {
            git = "https://github.com/Kerl13/tree-sitter-menhir";
            rev = "be8866a6bcc2b563ab0de895af69daeffa88fe70";
          };
        }
      ];
    };
    extraPackages = with pkgs; [
      simple-completion-language-server
      nixfmt-rfc-style
      nil
    ];
  };

  home.file.helix-unicode-input = {
    target = ".config/helix/unicode-input/base.toml";
    source = ./base.toml;
  };
  home.file.helix-menhir-queries-highlights = {
    target = ".config/helix/runtime/queries/menhir/highlights.scm";
    source = pkgs.fetchurl {
      url = tree-sitter-url + "highlights.scm";
      sha256 = "1pgn6prbday0vf82g27l01233ng7i5h95vmijs65r7ynb021grkl";
    };
  };
  home.file.helix-menhir-queries-injections = {
    target = ".config/helix/runtime/queries/menhir/injections.scm";
    source = pkgs.fetchurl {
      url = tree-sitter-url + "injections.scm";
      sha256 = "1m29zbrgrk29imha6lpn7an2c4198fi1a8l1q85ibnp5y8ds0v5v";
    };
  };
}