{
  lib,
  helpers,
}:
with lib; rec {
  settingsOptions = import ./settings-options.nix {inherit lib helpers;};

  settingsExample = {
    snippet.expand = "luasnip";
    mapping.__raw = ''
      cmp.mapping.preset.insert({
        ['<C-b>'] = cmp.mapping.scroll_docs(-4),
        ['<C-f>'] = cmp.mapping.scroll_docs(4),
        ['<C-Space>'] = cmp.mapping.complete(),
        ['<C-e>'] = cmp.mapping.abort(),
        ['<CR>'] = cmp.mapping.confirm({ select = true }),
      })
    '';
    sources.__raw = ''
      cmp.config.sources({
        { name = 'nvim_lsp' },
        { name = 'vsnip' },
        -- { name = 'luasnip' },
        -- { name = 'ultisnips' },
        -- { name = 'snippy' },
      }, {
        { name = 'buffer' },
      })
    '';
  };

  attrsOfOptions = with types;
    attrsOf (
      submodule {
        freeformType = attrsOf anything;
        options = settingsOptions;
      }
    );

  filetype = mkOption {
    type = attrsOfOptions;
    default = {};
    description = "Options for `cmp.filetype()`.";
    example = {
      python = {
        sources = [
          {name = "nvim_lsp";}
        ];
      };
    };
  };

  cmdline = mkOption {
    type = attrsOfOptions;
    default = {};
    description = "Options for `cmp.cmdline()`.";
    example = {
      "/" = {
        mapping.__raw = "cmp.mapping.preset.cmdline()";
        sources = [
          {name = "buffer";}
        ];
      };
      ":" = {
        mapping.__raw = "cmp.mapping.preset.cmdline()";
        sources = [
          {name = "path";}
          {
            name = "cmdline";
            option = {
              ignore_cmds = ["Man" "!"];
            };
          }
        ];
      };
    };
  };
}