{ config, pkgs, ... }:

{
  home = {
    sessionVariables = {
      EDITOR = "hx";
      VISUAL = "hx";
    };

    file.".config/helix/config.toml".text = ''
      theme = "monokai_pro_spectrum"

      [editor]
      cursorline = true
      true-color = true

      [editor.cursor-shape]
      insert = "bar"
      normal = "block"
      select = "underline"

      [editor.lsp]
      display-messages = true

      [editor.indent-guides]
      render = true

    '';

    file.".config/helix/languages.toml".text = ''
      [[language]]
      name = "nix"
      formatter = { command = "nixpkgs-fmt" }

      [[language]]
      name = "python"
      formatter = { command = "black", args = [ "-" ] }

      [[language]]
      name = "souffle"
      scope = "source.souffle"
      roots = []
      file-types = [ "dl" ]
      comment-token = "//"
      indent = { tab-width = 2, unit = "  " }

      [[grammar]]
      name = "souffle"
      source = { git = "https://github.com/langston-barrett/tree-sitter-souffle", rev = "8cc32019f6aa8d7ef98ff5abc643c8f35dfc1099" }
    '';

    file.".config/helix/runtime/queries/souffle/highlights.scm".text = ''
      [
        (pragma) @keyword
        (functor_decl) @keyword
        (component_decl) @keyword
        (component_init) @keyword
        (directive) @keyword
        (monotonic_rule) @keyword
        (subsumptive_rule) @keyword
        (fact) @keyword
        (relation_decl) @keyword
        (type_decl) @keyword
        (legacy_type_decl) @keyword
      ] @keyword

      [
        (primitive_type) @type
        (type_synonym) @type
        (subtype) @type
        (type_union) @type
        (type_record) @type
        (adt) @type
        (legacy_bare_type_decl) @type
      ] @type

      [
        (block_comment) @comment
        (line_comment) @comment
      ] @comment

      [
        (string) @string
      ] @string

      [
        (number) @constant.numeric
        (integer) @constant.numeric
        (decimal) @constant.numeric
        (unsigned) @constant.numeric
        (hex) @constant.numeric
        (binary) @constant.numeric
        (float) @constant.numeric
        (ipv4) @constant.numeric
      ] @constant.numeric

      [
        (ident) @variable
      ] @variable

      [
        (qualified_name) @entity
      ] @entity

      [
        (intrinsic_functor) @operator
      ] @operator
    '';

    packages = with pkgs.unstablePkgs; [
      black
      helix
      clang-tools
      rust-analyzer
      nil
      python310Packages.python-lsp-server
      texlab
      nodePackages.vscode-langservers-extracted
      nodePackages.typescript
      nodePackages.svelte-language-server
      nixpkgs-fmt
    ];
  };
}