{ ... }:
{
  programs.nixvim = {
    plugins.bufferline =
      let
        mouse = {
          right =
            # Lua
            "'vertical sbuffer %d'";
          close =
            # Lua
            ''
              function(bufnum)
                require("mini.bufremove").delete(bufnum)
              end
            '';
        };
      in
      {
        enable = true;

        settings = {
          options = {
            mode = "buffers";
            always_show_bufferline = true;
            buffer_close_icon = "󰅖";
            close_command.__raw = mouse.close;
            close_icon = "";
            diagnostics = "nvim_lsp";
            diagnostics_indicator =
              # Lua
              ''
                function(count, level, diagnostics_dict, context)
                  local s = ""
                  for e, n in pairs(diagnostics_dict) do
                    local sym = e == "error" and " "
                    or (e == "warning" and " " or "" )
                    if(sym ~= "") then
                      s = s .. " " .. n .. sym
                    end
                  end
                  return s
                end
              '';
            # Will make sure all names in bufferline are unique
            enforce_regular_tabs = false;

            groups = {
              options = {
                toggle_hidden_on_enter = true;
              };

              items = [
                {
                  name = "Tests";
                  highlight = {
                    underline = true;
                    fg = "#a6da95";
                    sp = "#494d64";
                  };
                  priority = 2;
                  # icon = "";
                  matcher.__raw = ''
                    function(buf)
                      return buf.name:match('%test') or buf.name:match('%.spec')
                    end
                  '';
                }
                {
                  name = "Docs";
                  highlight = {
                    undercurl = true;
                    fg = "#ffffff";
                    sp = "#494d64";
                  };
                  auto_close = false;
                  matcher.__raw = ''
                    function(buf)
                      return buf.name:match('%.md') or buf.name:match('%.txt')
                    end
                  '';
                }
              ];
            };

            indicator = {
              style = "icon";
              icon = "▎";
            };

            left_trunc_marker = "";
            max_name_length = 18;
            max_prefix_length = 15;
            modified_icon = "●";

            numbers.__raw = ''
              function(opts)
                return string.format('%s·%s', opts.raise(opts.id), opts.lower(opts.ordinal))
              end
            '';

            persist_buffer_sort = true;
            right_mouse_command.__raw = mouse.right;
            right_trunc_marker = "";
            separator_style = "slant";
            show_buffer_close_icons = true;
            show_buffer_icons = true;
            show_close_icon = true;
            show_tab_indicators = true;
            sort_by = "extension";
            tab_size = 18;

            offsets = [
              {
                filetype = "neo-tree";
                text = "File Explorer";
                text_align = "center";
                highlight = "Directory";
              }
            ];
          };
        };
      };

    keymaps = [
      {
        mode = "n";
        key = "<leader>bP";
        action = "<cmd>BufferLineTogglePin<cr>";
        options = {
          desc = "Pin buffer toggle";
        };
      }
      {
        mode = "n";
        key = "<leader>bp";
        action = "<cmd>BufferLinePick<cr>";
        options = {
          desc = "Pick Buffer";
        };
      }
      {
        mode = "n";
        key = "<leader>bsd";
        action = "<cmd>BufferLineSortByDirectory<cr>";
        options = {
          desc = "Sort By Directory";
        };
      }
      {
        mode = "n";
        key = "<leader>bse";
        action = "<cmd>BufferLineSortByExtension<cr>";
        options = {
          desc = "Sort By Extension";
        };
      }
      {
        mode = "n";
        key = "<leader>bsr";
        action = "<cmd>BufferLineSortByRelativeDirectory<cr>";
        options = {
          desc = "Sort By Relative Directory";
        };
      }
    ];
  };
}