{ nix2lua, vim, ... }:

with nix2lua.lib;

let
  defaultCmpKeymaps = {
    "<C-b>" = call "cmp.mapping.scroll_docs" (- 4);
    "<C-d>" = call "cmp.mapping.scroll_docs" 4;
    "<C-Space>" = call0 "cmp.mapping.complete";
    "<C-e>" = call0 "cmp.mapping.abort";
    "<CR>" = call "cmp.mapping.confirm" { select = true; };
  };
in

{ cmpKeymaps ? defaultCmpKeymaps
, extraCmpKeymaps ? { }
, cmpSources ? { }
}:

{
  luasnip = true;
  cmp-luasnip = true;

  nvim-cmp = [
    (vim.opt "completeopt" [ "menu" "menuone" "noselect" ])

    (local (set "cmp" (require "cmp")))

    (pipe1
      (var "cmp")
      (call "setup" {
        snippet.exand = lambda [ "args" ]
          (pipe1 (require "luasnip") (call "lsp_expand" (var "args")));

        mapping = call "cmp.mapping.preset.insert" (cmpKeymaps // extraCmpKeymaps);

        sources = call "cmp.config.sources" cmpSources;
      })
    )
  ];
}