neovim-flake/modules/terminal/toggleterm/config.nix

{
  config,
  lib,
  ...
}: let
  inherit (builtins) toJSON;
  inherit (lib) mkMerge mkIf mkBinding nvim getExe;

  cfg = config.vim.terminal.toggleterm;
in {
  config = mkMerge [
    (
      mkIf cfg.enable {
        vim.startPlugins = [
          "toggleterm-nvim"
        ];

        vim.maps.normal = mkBinding cfg.mappings.open "<Cmd>execute v:count . \"ToggleTerm\"<CR>" "Toggle terminal";

        vim.luaConfigRC.toggleterm = nvim.dag.entryAnywhere ''
          require("toggleterm").setup({
            open_mapping = null,
            direction = '${toString cfg.direction}',
            -- TODO: this should probably be turned into a module that uses the lua function if and only if the user has not set it
            size = function(term)
              if term.direction == "horizontal" then
                return 15
              elseif term.direction == "vertical" then
                return vim.o.columns * 0.4
              end
            end,
            winbar = {
              enabled = '${toString cfg.enable_winbar}',
              name_formatter = function(term) --  term: Terminal
                return term.name
              end
            },
          })
        '';
      }
    )
    (
      mkIf (cfg.enable && cfg.lazygit.enable)
      {
        vim.startPlugins = lib.optionals (cfg.lazygit.package != null) [
          cfg.lazygit.package
        ];
        vim.luaConfigRC.toggleterm-lazygit = nvim.dag.entryAfter ["toggleterm"] ''
          local terminal = require 'toggleterm.terminal'
          local lazygit = terminal.Terminal:new({
            cmd = '${
            if (cfg.lazygit.package != null)
            then getExe cfg.lazygit.package
            else "lazygit"
          }',
            direction = '${cfg.lazygit.direction}',
            hidden = true,
            on_open = function(term)
              vim.cmd("startinsert!")
            end
          })

          vim.keymap.set('n', ${toJSON cfg.lazygit.mappings.open}, function() lazygit:toggle() end, {silent = true, noremap = true, desc = 'Open lazygit [toggleterm]'})
        '';
      }
    )
  ];
}