{ config, lib, pkgs, ... }:

let
  inherit (lib.nix2lua) require pipe var call;
  cfg = config.plugins.navigation.nvim-tree;
in
{
  options.plugins.navigation.nvim-tree = with lib; {
    enable = mkEnableOption "nvim-tree";
    package = mkPackageOption pkgs.vimPlugins "nvim-tree-lua" { };
    settings = mkOption {
      type = types.attrs;
      default = { };
      description = ''
        `:help nvim-tree-setup`
      '';
    };
    disableNetrw = mkOption {
      type = types.bool;
      default = true;
      description = ''
        Disabling netrw is strongly advised.

        `:help nvim-tree-netrw`
      '';
    };
    keymap = {
      withDefault = mkOption {
        type = types.bool;
        default = true;
        description = "attach default mappings";
      };
      set = mkOption {
        type = with types; listOf keymap;
        default = [ ];
      };
    };
  };


  config = lib.mkIf cfg.enable {
    fn.nvim-tree-lua-on-attach = lib.mkIf (cfg.keymap.set != [ ]) {
      args = [ "bufnr" ];
      content = { bufnr }: {
        extra = lib.mkIf cfg.keymap.withDefault pipe [
          (require "nvim-tree.api")
          "config"
          "mappings"
          (call "default_on_attach" bufnr)
        ];

        vim.keymap.set = map (attrs: attrs // { buffer = bufnr; }) cfg.keymap.set;
      };
    };

    plugin.nvim-tree-lua = {
      name = "nvim-tree";
      package = cfg.package;
      setupSettings = lib.mkMerge [
        cfg.settings
        (lib.mkIf (cfg.keymap.set != [ ]) {
          on_attach = config.fn.nvim-tree-lua-on-attach.lambda;
        })
      ];
    };

    plugin.nvim-web-devicons = { };

    vim.g = lib.mkIf cfg.disableNetrw {
      loaded_netrw = 1;
      loaded_netrwPlugin = 1;
    };
  };
}