{ self, ... }:
let
  inherit (self.outputs) style;
in
{
  lib,
  config,
  ...
}:
{
  config = lib.mkIf config.programs.helix.enable {
    # helix rust debugger stuff
    # https://github.com/helix-editor/helix/wiki/Debugger-Configurations
    home.file."${config.xdg.configHome}/lldb_vscode_rustc_primer.py" = {
      text = ''
        import subprocess
        import pathlib
        import lldb

        # Determine the sysroot for the active Rust interpreter
        rustlib_etc = pathlib.Path(subprocess.getoutput('rustc --print sysroot')) / 'lib' / 'rustlib' / 'etc'
        if not rustlib_etc.exists():
            raise RuntimeError('Unable to determine rustc sysroot')

        # Load lldb_lookup.py and execute lldb_commands with the correct path
        lldb.debugger.HandleCommand(f"""command script import "{rustlib_etc / 'lldb_lookup.py'}" """)
        lldb.debugger.HandleCommand(f"""command source -s 0 "{rustlib_etc / 'lldb_commands'}" """)
      '';
    };

    /*
      NOTE: Currently, helix crashes when editing markdown in certain scenarios,
      presumably due to an old markdown treesitter grammar
      https://github.com/helix-editor/helix/issues/9011
      https://github.com/helix-editor/helix/issues/8821
      https://github.com/tree-sitter-grammars/tree-sitter-markdown/issues/114
    */

    programs.helix = {
      languages = {
        language-server = {
          lexical = {
            command = "lexical";
            args = [ "start" ];
          };

          /*
            next-ls = {
              command = "next-ls";
              args = ["--stdout"];
            };

            deno = {
              command = "deno";
              args = ["lsp"];
              config = {
                enable = true;
                lint = true;
                unstable = true;
              };
            };
          */
        };

        language = [
          /*
            {
              name = "heex";
              scope = "source.heex";
              injection-regex = "heex";
              language-servers = ["lexical"]; # "lexical" "next-ls" ?
              auto-format = true;
              file-types = ["heex"];
              roots = ["mix.exs" "mix.lock"];
              indent = {
                tab-width = 2;
                unit = "  ";
              };
            }
            {
              name = "elixir";
              language-servers = ["lexical"]; # "lexical" "next-ls" ?
              auto-format = true;
            }
          */
          {
            name = "rust";

            debugger = {
              name = "lldb-vscode";
              transport = "stdio";
              command = "lldb-vscode";
              templates = [
                {
                  name = "binary";
                  request = "launch";
                  completion = [
                    {
                      name = "binary";
                      completion = "filename";
                    }
                  ];
                  args = {
                    program = "{0}";
                    initCommands = [ "command script import ${config.xdg.configHome}/lldb_vscode_rustc_primer.py" ];
                  };
                }
              ];
            };
          }
          {
            name = "html";
            file-types = [ "html" ];
            scope = "source.html";
            auto-format = false;
          }
          {
            name = "nix";
            file-types = [ "nix" ];
            scope = "source.nix";
            auto-format = true;
            formatter = {
              command = "alejandra";
              args = [ "-" ];
            };
          }
          {
            name = "fish";
            file-types = [ "fish" ];
            scope = "source.fish";
            auto-format = true;
            indent = {
              tab-width = 2;
              unit = "\t";
            };
          }
          {
            name = "toml";
            file-types = [ "toml" ];
            scope = "source.toml";
            auto-format = true;
          }

          /*
            {
              name = "javascript";
              language-id = "javascript";
              grammar = "javascript";
              scope = "source.js";
              injection-regex = "^(js|javascript)$";
              file-types = ["js" "mjs"];
              shebangs = ["deno"];
              language-servers = ["deno"];
              roots = ["deno.jsonc" "deno.json"];
              formatter = {
                command = "deno";
                args = ["fmt"];
              };
              auto-format = true;
              comment-token = "//";
              indent = {
                tab-width = 2;
                unit = "\t";
              };
            }

            {
              name = "typescript";
              language-id = "typescript";
              grammar = "typescript";
              scope = "source.ts";
              injection-regex = "^(ts|typescript)$";
              file-types = ["ts"];
              shebangs = ["deno"];
              language-servers = ["deno"];
              roots = ["deno.jsonc" "deno.json"];
              formatter = {
                command = "deno";
                args = ["fmt"];
              };
              auto-format = true;
              comment-token = "//";
              indent = {
                tab-width = 2;
                unit = "\t";
              };
            }

            {
              name = "jsonc";
              language-id = "json";
              grammar = "jsonc";
              scope = "source.jsonc";
              injection-regex = "^(jsonc)$";
              roots = ["deno.jsonc" "deno.json"];
              file-types = ["jsonc"];
              language-servers = ["deno"];
              indent = {
                tab-width = 2;
                unit = "  ";
              };
              auto-format = true;
            }
          */
        ];
      };

      settings = {
        theme = "custom";

        editor = {
          soft-wrap.enable = true;
          auto-pairs = false;
          bufferline = "multiple";
          rulers = [
            81
            121
          ];
          cursorline = true;

          /*
            auto-save = false;
            completion-trigger-len = 1;
            color-modes = false;
            scrolloff = 8;
          */

          inline-diagnostics = {
            cursor-line = "hint";
            other-lines = "error";
          };

          cursor-shape = {
            normal = "block";
            insert = "bar";
            select = "underline";
          };

          file-picker.hidden = false;
          indent-guides = {
            render = true;
            character = "▏";
          };

          lsp = {
            display-messages = true;
            # display-inlay-hints = true;
          };
          statusline = {
            separator = " ";
            mode = {
              "normal" = "N";
              "insert" = "I";
              "select" = "S";
            };
            left = [
              "file-name"
              "mode"
              /*
                "selections"
                "primary-selection-length"
                "position"
                "position-percentage"
              */
              "spinner"
              "diagnostics"
              "workspace-diagnostics"
            ];
            /*
              center = ["file-name"];
              right = ["version-control" "total-line-numbers" "file-encoding"];
            */
          };
        };
        keys = {
          insert = {
            j = {
              k = "normal_mode";
              j = "normal_mode";
              K = "normal_mode";
              J = "normal_mode";
            };
          };

          normal = {
            "C-k" = "jump_view_up";
            "C-j" = "jump_view_down";
            "C-h" = "jump_view_left";
            "C-l" = "jump_view_right";
            "C-q" = ":quit-all!";
            # "L" = "repeat_last_motion";
            space = {
              q = ":reflow 80";
              Q = ":reflow 120";
              C = ":bc!";
              h = ":toggle lsp.display-inlay-hints";
              # O = ["select_textobject_inner WORD", ":pipe-to xargs xdg-open"];
            };
          };

          select = {
            space = {
              q = ":reflow 80";
              Q = ":reflow 120";
            };
            # "L" = "repeat_last_motion";
          };
        };
      };

      themes = with style.colors.withHashPrefix; {
        custom = {
          "type" = orange;

          "constructor" = blue;

          "constant" = orange;
          "constant.builtin" = orange;
          "constant.character" = yellow;
          "constant.character.escape" = orange;

          "string" = green;
          "string.regexp" = orange;
          "string.special" = blue;

          "comment" = {
            fg = fgdim;
            modifiers = [ "italic" ];
          };

          "variable" = text;
          "variable.parameter" = {
            fg = red;
            modifiers = [ "italic" ];
          };
          "variable.builtin" = red;
          "variable.other.member" = text;

          "label" = blue;

          "punctuation" = fgdim;
          "punctuation.special" = blue;

          "keyword" = purple;
          "keyword.storage.modifier.ref" = yellow;
          "keyword.control.conditional" = {
            fg = purple;
            modifiers = [ "italic" ];
          };

          "operator" = blue;

          "function" = blue;
          "function.macro" = purple;

          "tag" = purple;
          "attribute" = blue;

          "namespace" = {
            fg = blue;
            modifiers = [ "italic" ];
          };

          "special" = blue;

          "markup.heading.marker" = {
            fg = orange;
            modifiers = [ "bold" ];
          };
          "markup.heading.1" = blue;
          "markup.heading.2" = yellow;
          "markup.heading.3" = green;
          "markup.heading.4" = orange;
          "markup.heading.5" = red;
          "markup.heading.6" = fg3;
          "markup.list" = purple;
          "markup.bold" = {
            modifiers = [ "bold" ];
          };
          "markup.italic" = {
            modifiers = [ "italic" ];
          };
          "markup.strikethrough" = {
            modifiers = [ "crossed_out" ];
          };
          "markup.link.url" = {
            fg = red;
            modifiers = [ "underlined" ];
          };
          "markup.link.text" = blue;
          "markup.raw" = red;

          "diff.plus" = green;
          "diff.minus" = red;
          "diff.delta" = blue;

          "ui.linenr" = {
            fg = fgdim;
          };
          "ui.linenr.selected" = {
            fg = fg2;
          };

          "ui.statusline" = {
            fg = fgdim;
            bg = bg;
          };
          "ui.statusline.inactive" = {
            fg = fg3;
            bg = bg2;
          };
          "ui.statusline.normal" = {
            fg = bg;
            bg = purple;
            modifiers = [ "bold" ];
          };
          "ui.statusline.insert" = {
            fg = bg;
            bg = green;
            modifiers = [ "bold" ];
          };
          "ui.statusline.select" = {
            fg = bg;
            bg = red;
            modifiers = [ "bold" ];
          };

          "ui.popup" = {
            fg = text;
            bg = bg2;
          };
          "ui.window" = {
            fg = fgdim;
          };
          "ui.help" = {
            fg = fg2;
            bg = bg2;
          };

          "ui.bufferline" = {
            fg = fgdim;
            bg = bg2;
          };
          "ui.bufferline.background" = {
            bg = bg2;
          };

          "ui.text" = text;
          "ui.text.focus" = {
            fg = text;
            bg = bg3;
            modifiers = [ "bold" ];
          };
          "ui.text.inactive" = {
            fg = fg2;
          };

          "ui.virtual" = fg2;
          "ui.virtual.ruler" = {
            bg = bg3;
          };
          "ui.virtual.indent-guide" = bg3;
          "ui.virtual.inlay-hint" = {
            fg = bg3;
            bg = bg;
          };

          "ui.selection" = {
            bg = bg5;
          };

          "ui.cursor" = {
            fg = bg;
            bg = text;
          };
          "ui.cursor.primary" = {
            fg = bg;
            bg = red;
          };
          "ui.cursor.match" = {
            fg = orange;
            modifiers = [ "bold" ];
          };

          "ui.cursor.primary.normal" = {
            fg = bg;
            bg = text;
          };
          "ui.cursor.primary.insert" = {
            fg = bg;
            bg = text;
          };
          "ui.cursor.primary.select" = {
            fg = bg;
            bg = text;
          };

          "ui.cursor.normal" = {
            fg = bg;
            bg = fg;
          };
          "ui.cursor.insert" = {
            fg = bg;
            bg = fg;
          };
          "ui.cursor.select" = {
            fg = bg;
            bg = fg;
          };

          "ui.cursorline.primary" = {
            bg = bg3;
          };

          "ui.highlight" = {
            bg = bg3;
            fg = bg;
            modifiers = [ "bold" ];
          };

          "ui.menu" = {
            fg = fg3;
            bg = bg2;
          };
          "ui.menu.selected" = {
            fg = text;
            bg = bg3;
            modifiers = [ "bold" ];
          };

          "diagnostic.error" = {
            underline = {
              color = red;
              style = "curl";
            };
          };
          "diagnostic.warning" = {
            underline = {
              color = orange;
              style = "curl";
            };
          };
          "diagnostic.info" = {
            underline = {
              color = blue;
              style = "curl";
            };
          };
          "diagnostic.hint" = {
            underline = {
              color = blue;
              style = "curl";
            };
          };

          error = red;
          warning = orange;
          info = blue;
          hint = yellow;
          "ui.background" = {
            bg = bg;
            fg = fgdim;
          };

          /*
            "ui.cursorline.primary" = { bg = "default" }
            "ui.cursorline.secondary" = { bg = "default" }
          */
          "ui.cursorcolumn.primary" = {
            bg = bg3;
          };
          "ui.cursorcolumn.secondary" = {
            bg = bg3;
          };

          "ui.bufferline.active" = {
            fg = primary;
            bg = bg3;
            underline = {
              color = primary;
              style = "";
            };
          };
        };
      };
    };
  };
}