{lib, ...}: let
  inherit (lib.options) mkOption mkEnableOption;
  inherit (lib.types) int str enum nullOr attrs;
  inherit (lib.nvim.types) mkPluginSetupOption luaInline;
in {
  options.vim.assistant = {
    codecompanion-nvim = {
      enable = mkEnableOption "complementary neovim plugin for codecompanion.nvim";

      setupOpts = mkPluginSetupOption "codecompanion-nvim" {
        opts = {
          send_code = mkEnableOption "code from being sent to the LLM.";

          log_level = mkOption {
            type = enum [
              "DEBUG"
              "INFO"
              "ERROR"
              "TRACE"
            ];
            default = "ERROR";
            description = "Change the level of logging.";
          };

          language = mkOption {
            type = str;
            default = "English";
            description = "Specify which language an LLM should respond in.";
          };
        };

        display = {
          diff = {
            enabled = mkEnableOption "a diff to be created so you can see the changes made by the LLM." // {default = true;};

            close_chat_at = mkOption {
              type = int;
              default = 240;
              description = "Close an open chat buffer if the total columns of your display are less than...";
            };

            layout = mkOption {
              type = enum [
                "vertical"
                "horizontal"
              ];
              default = "vertical";
              description = "Type of split for default provider.";
            };

            provider = mkOption {
              type = enum [
                "default"
                "mini_diff"
              ];
              default = "default";
              description = "The preferred kind of provider.";
            };
          };

          inline = {
            layout = mkOption {
              type = enum [
                "vertical"
                "horizontal"
                "buffer"
              ];
              default = "vertical";
              description = "Customize how output is created in new buffer.";
            };
          };

          chat = {
            show_header_separator = mkEnableOption "show header separators in the chat buffer? Set this to false if you're using an external markdown formatting plugin.";
            show_references = mkEnableOption "show references (from slash commands and variables) in the chat buffer." // {default = true;};
            show_settings = mkEnableOption "show LLM settings at the top of the chat buffer.";
            show_token_count = mkEnableOption "show the token count for each response." // {default = true;};
            start_in_insert_mode = mkEnableOption "open the chat buffer in insert mode.";
            auto_scroll = mkEnableOption "automatic page scrolling.";

            intro_message = mkOption {
              type = str;
              default = "Welcome to CodeCompanion ✨! Press ? for options.";
              description = "Message to appear in chat buffer.";
            };

            separator = mkOption {
              type = str;
              default = "─";
              description = "The separator between the different messages in the chat buffer.";
            };

            icons = {
              pinned_buffer = mkOption {
                type = str;
                default = " ";
                description = "The icon to represent a pinned buffer.";
              };

              watched_buffer = mkOption {
                type = str;
                default = "👀 ";
                description = "The icon to represent a watched buffer.";
              };
            };
          };

          action_palette = {
            width = mkOption {
              type = int;
              default = 95;
              description = "Width of the action palette.";
            };

            height = mkOption {
              type = int;
              default = 10;
              description = "Height of the action palette.";
            };

            prompt = mkOption {
              type = str;
              default = "Prompt ";
              description = "Prompt used for interactive LLM calls.";
            };

            provider = mkOption {
              type = enum [
                "default"
                "telescope"
                "mini_pick"
              ];
              default = "default";
              description = "Provider used for the action palette.";
            };

            opts = {
              show_default_actions = mkEnableOption "show the default actions in the action palette?" // {default = true;};
              show_default_prompt_library = mkEnableOption "show the default prompt library in the action palette?" // {default = true;};
            };
          };
        };

        adapters = mkOption {
          type = nullOr luaInline;
          default = null;
          description = "An adapter is what connects Neovim to an LLM.";
        };

        strategies = {
          chat = {
            adapter = mkOption {
              type = nullOr str;
              default = null;
              description = "Adapter used for the chat strategy.";
            };

            keymaps = mkOption {
              type = nullOr attrs;
              default = null;
              description = "Define or override the default keymaps.";
            };

            variables = mkOption {
              type = nullOr luaInline;
              default = null;
              description = "Define your own variables to share specific content.";
            };

            slash_commands = mkOption {
              type = nullOr luaInline;
              default = null;
              description = "Slash Commands (invoked with /) let you dynamically insert context into the chat buffer, such as file contents or date/time.";
            };

            tools = mkOption {
              type = nullOr attrs;
              default = null;
              description = "Tools perform specific tasks (e.g., running shell commands, editing buffers, etc.) when invoked by an LLM.";
            };

            roles = mkOption {
              type = nullOr luaInline;
              default = null;
              description = "The chat buffer places user and LLM responses under a H2 header. These can be customized in the configuration";
            };
          };

          inline = {
            adapter = mkOption {
              type = nullOr str;
              default = null;
              description = "Adapter used for the inline strategy.";
            };

            variables = mkOption {
              type = nullOr luaInline;
              default = null;
              description = "Define your own variables to share specific content.";
            };

            keymaps = {
              accept_change = {
                n = mkOption {
                  type = str;
                  default = "ga";
                  description = "Accept the suggested change.";
                };
              };

              reject_change = {
                n = mkOption {
                  type = str;
                  default = "gr";
                  description = "Reject the suggested change.";
                };
              };
            };
          };
        };

        prompt_library = mkOption {
          type = nullOr attrs;
          default = null;
          description = "A prompt library is a collection of prompts that can be used in the action palette.";
        };
      };
    };
  };
}